SCIP
Solving Constraint Integer Programs
Solving Constraint Integer Programs
LP management methods and data structures.
In LP management, we have to differ between the current LP and the SCIP_LP stored in the LP solver. All LP methods affect the current LP only. Before solving the current LP with the LP solver or setting an LP state, the LP solvers data has to be updated to the current LP with a call to lpFlush().
Definition in file lp.c.
#include <assert.h>#include <math.h>#include <limits.h>#include <string.h>#include "scip/def.h"#include "scip/set.h"#include "scip/stat.h"#include "scip/intervalarith.h"#include "scip/clock.h"#include "scip/misc.h"#include "scip/lp.h"#include "scip/var.h"#include "scip/prob.h"#include "scip/sol.h"#include "scip/solve.h"#include "scip/event.h"#include "scip/pub_message.h"#include "lpi/lpi.h"Go to the source code of this file.
Macros | |
| #define | debugRowPrint(x, y) |
| #define | debugColPrint(x, y) |
| #define | checkRow(row) |
| #define | checkRowSqrnorm(row) |
| #define | checkRowSumnorm(row) |
| #define | checkRowObjprod(row) |
| #define | checkLinks(lp) |
| #define | lpCutoffDisabled(set) (set->lp_disablecutoff == 1 || (set->nactivepricers > 0 && set->lp_disablecutoff == 2)) |
| #define | DIVESTACKINITSIZE 100 |
| #define | MAXNUMTROUBLELPMSGS 10 |
| #define | FEASTOLTIGHTFAC 0.001 |
| #define | DIVESTACKGROWFACT 1.5 |
Variables | |
| static const SCIP_Real | scalars [] = {3.0, 5.0, 7.0, 9.0, 11.0, 13.0, 15.0, 17.0, 19.0} |
| static const int | nscalars = 9 |
| #define debugRowPrint | ( | x, | |
| y | |||
| ) |
Definition at line 105 of file lp.c.
Referenced by lpFlushAddRows(), and rowScale().
| #define debugColPrint | ( | x, | |
| y | |||
| ) |
Definition at line 138 of file lp.c.
Referenced by lpFlushAddCols().
| #define checkRow | ( | row | ) |
Definition at line 652 of file lp.c.
Referenced by rowSortNonLP(), and SCIProwEnsureSize().
| #define checkRowSqrnorm | ( | row | ) |
Definition at line 725 of file lp.c.
Referenced by SCIProwGetNorm(), and SCIProwGetObjParallelism().
| #define checkRowSumnorm | ( | row | ) |
Definition at line 726 of file lp.c.
Referenced by SCIProwGetSumNorm().
| #define checkRowObjprod | ( | row | ) |
Definition at line 727 of file lp.c.
Referenced by SCIProwGetObjParallelism().
| #define checkLinks | ( | lp | ) |
Definition at line 1581 of file lp.c.
Referenced by colLink(), colUnlink(), lpDelColset(), lpDelRowset(), lpSolve(), rowEventSideChanged(), rowLink(), SCIPcolAddCoef(), SCIPcolChgCoef(), SCIPcolDelCoef(), SCIPcolIncCoef(), SCIPlpAddCol(), SCIPlpAddRow(), SCIPlpFlush(), SCIPlpMarkFlushed(), SCIPlpShrinkCols(), SCIPlpShrinkRows(), SCIProwAddCoef(), SCIProwChgCoef(), SCIProwDelCoef(), and SCIProwIncCoef().
| #define lpCutoffDisabled | ( | set | ) | (set->lp_disablecutoff == 1 || (set->nactivepricers > 0 && set->lp_disablecutoff == 2)) |
should the objective limit of the LP solver be disabled
Definition at line 2599 of file lp.c.
Referenced by lpSetUobjlim(), lpSolve(), SCIPlpSetCutoffbound(), and SCIPlpSolveAndEval().
| #define DIVESTACKINITSIZE 100 |
Definition at line 8811 of file lp.c.
Referenced by SCIPlpCreate().
| #define MAXNUMTROUBLELPMSGS 10 |
maximal number of verblevel-high messages about numerical trouble in LP that will be printed when this number is reached and display/verblevel is not full, then further messages are suppressed in this run
Definition at line 11083 of file lp.c.
Referenced by lpNumericalTroubleMessage().
| #define FEASTOLTIGHTFAC 0.001 |
Definition at line 11144 of file lp.c.
Referenced by lpSolveStable().
| #define DIVESTACKGROWFACT 1.5 |
Definition at line 15416 of file lp.c.
Referenced by SCIPlpRecordOldRowSideDive().
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ensures, that chgcols array can store at least num entries
| lp | current LP data |
| set | global SCIP settings |
| num | minimum number of entries to store |
Definition at line 147 of file lp.c.
References BMSreallocMemoryArray, SCIP_Lp::chgcols, SCIP_Lp::chgcolssize, SCIP_Lp::nchgcols, SCIP_ALLOC, SCIP_OKAY, and SCIPsetCalcMemGrowSize().
Referenced by insertColChgcols().
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ensures, that chgrows array can store at least num entries
| lp | current LP data |
| set | global SCIP settings |
| num | minimum number of entries to store |
Definition at line 170 of file lp.c.
References BMSreallocMemoryArray, SCIP_Lp::chgrows, SCIP_Lp::chgrowssize, SCIP_Lp::nchgrows, SCIP_ALLOC, SCIP_OKAY, and SCIPsetCalcMemGrowSize().
Referenced by rowSideChanged().
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ensures, that lpicols array can store at least num entries
| lp | current LP data |
| set | global SCIP settings |
| num | minimum number of entries to store |
Definition at line 193 of file lp.c.
References BMSreallocMemoryArray, SCIP_Lp::lpicols, SCIP_Lp::lpicolssize, SCIP_Lp::nlpicols, SCIP_ALLOC, SCIP_OKAY, and SCIPsetCalcMemGrowSize().
Referenced by lpFlushAddCols().
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ensures, that lpirows array can store at least num entries
| lp | current LP data |
| set | global SCIP settings |
| num | minimum number of entries to store |
Definition at line 216 of file lp.c.
References BMSreallocMemoryArray, SCIP_Lp::lpirows, SCIP_Lp::lpirowssize, SCIP_Lp::nlpirows, SCIP_ALLOC, SCIP_OKAY, and SCIPsetCalcMemGrowSize().
Referenced by lpFlushAddRows().
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ensures, that cols array can store at least num entries
| lp | current LP data |
| set | global SCIP settings |
| num | minimum number of entries to store |
Definition at line 239 of file lp.c.
References BMSreallocMemoryArray, SCIP_Lp::cols, SCIP_Lp::colssize, SCIP_Lp::ncols, SCIP_ALLOC, SCIP_OKAY, and SCIPsetCalcMemGrowSize().
Referenced by SCIPlpAddCol().
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ensures, that lazy cols array can store at least num entries
| lp | current LP data |
| set | global SCIP settings |
| num | minimum number of entries to store |
Definition at line 262 of file lp.c.
References BMSreallocMemoryArray, SCIP_Lp::lazycols, SCIP_Lp::lazycolssize, SCIP_Lp::nlazycols, SCIP_ALLOC, SCIP_OKAY, and SCIPsetCalcMemGrowSize().
Referenced by SCIPlpAddCol().
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ensures, that rows array can store at least num entries
| lp | current LP data |
| set | global SCIP settings |
| num | minimum number of entries to store |
Definition at line 285 of file lp.c.
References BMSreallocMemoryArray, SCIP_Lp::nrows, SCIP_Lp::rows, SCIP_Lp::rowssize, SCIP_ALLOC, SCIP_OKAY, and SCIPsetCalcMemGrowSize().
Referenced by SCIPlpAddRow().
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ensures, that row array of column can store at least num entries
| col | LP column |
| blkmem | block memory |
| set | global SCIP settings |
| num | minimum number of entries to store |
Definition at line 308 of file lp.c.
References BMSreallocBlockMemoryArray, SCIP_Col::len, SCIP_Col::linkpos, NULL, SCIP_Col::rows, SCIP_ALLOC, SCIP_OKAY, SCIPsetCalcMemGrowSize(), SCIP_Col::size, and SCIP_Col::vals.
Referenced by colAddCoef().
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save current LP values dependent on the solution
| lp | LP data |
| stat | problem statistics |
| blkmem | block memory |
Definition at line 335 of file lp.c.
References BMSallocMemory, SCIP_LpSolVals::dualchecked, SCIP_Lp::dualchecked, SCIP_LpSolVals::dualfeasible, SCIP_Lp::dualfeasible, SCIP_LpSolVals::lpissolved, SCIP_LpSolVals::lpobjval, SCIP_Lp::lpobjval, SCIP_LpSolVals::lpsolstat, SCIP_Lp::lpsolstat, NULL, SCIP_LpSolVals::primalchecked, SCIP_Lp::primalchecked, SCIP_LpSolVals::primalfeasible, SCIP_Lp::primalfeasible, SCIP_ALLOC, SCIP_OKAY, SCIP_LpSolVals::solisbasic, SCIP_Lp::solisbasic, SCIP_Lp::solved, and SCIP_Lp::storedsolvals.
Referenced by SCIPlpStartDive().
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restore LP solution values in column
| lp | LP data |
| blkmem | block memory |
| validlp | number of lp for which restored values are valid |
Definition at line 369 of file lp.c.
References SCIP_LpSolVals::dualchecked, SCIP_Lp::dualchecked, SCIP_LpSolVals::dualfeasible, SCIP_Lp::dualfeasible, FALSE, SCIP_LpSolVals::lpissolved, SCIP_LpSolVals::lpobjval, SCIP_Lp::lpobjval, SCIP_LpSolVals::lpsolstat, SCIP_Lp::lpsolstat, NULL, SCIP_LpSolVals::primalchecked, SCIP_Lp::primalchecked, SCIP_LpSolVals::primalfeasible, SCIP_Lp::primalfeasible, SCIP_INVALID, SCIP_LPSOLSTAT_INFEASIBLE, SCIP_LPSOLSTAT_ITERLIMIT, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_LPSOLSTAT_OBJLIMIT, SCIP_LPSOLSTAT_OPTIMAL, SCIP_LPSOLSTAT_TIMELIMIT, SCIP_LPSOLSTAT_UNBOUNDEDRAY, SCIP_OKAY, SCIP_LpSolVals::solisbasic, SCIP_Lp::solisbasic, SCIP_Lp::solved, SCIP_Lp::storedsolvals, SCIP_Lp::validfarkaslp, and SCIP_Lp::validsollp.
Referenced by SCIPlpEndDive().
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save current LP solution values stored in each column
| col | LP column |
| blkmem | block memory |
Definition at line 427 of file lp.c.
References SCIP_ColSolVals::basisstatus, SCIP_Col::basisstatus, BMSallocBlockMemory, NULL, SCIP_ColSolVals::primsol, SCIP_Col::primsol, SCIP_ColSolVals::redcost, SCIP_Col::redcost, SCIP_ALLOC, SCIP_OKAY, and SCIP_Col::storedsolvals.
Referenced by SCIPlpStartDive().
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restore LP solution values in column
| col | LP column |
| blkmem | block memory |
| validlp | number of lp for which restored values are valid |
| freebuffer | should buffer for LP solution values be freed? |
Definition at line 454 of file lp.c.
References SCIP_ColSolVals::basisstatus, SCIP_Col::basisstatus, BMSfreeBlockMemoryNull, NULL, SCIP_ColSolVals::primsol, SCIP_Col::primsol, SCIP_ColSolVals::redcost, SCIP_Col::redcost, SCIP_BASESTAT_ZERO, SCIP_OKAY, SCIP_Col::storedsolvals, SCIP_Col::validfarkaslp, and SCIP_Col::validredcostlp.
Referenced by SCIPlpEndDive().
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save current LP solution values stored in each column
| row | LP row |
| blkmem | block memory |
| infeasible | is the solution infeasible? |
Definition at line 501 of file lp.c.
References SCIP_RowSolVals::activity, SCIP_Row::activity, SCIP_RowSolVals::basisstatus, SCIP_Row::basisstatus, BMSallocBlockMemory, SCIP_Row::dualfarkas, SCIP_RowSolVals::dualsol, SCIP_Row::dualsol, NULL, SCIP_ALLOC, SCIP_BASESTAT_BASIC, SCIP_INVALID, SCIP_OKAY, and SCIP_Row::storedsolvals.
Referenced by SCIPlpStartDive().
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restore LP solution values in row
| row | LP column |
| blkmem | block memory |
| validlp | number of lp for which restored values are valid |
| freebuffer | should buffer for LP solution values be freed? |
| infeasible | is the solution infeasible? |
Definition at line 538 of file lp.c.
References SCIP_RowSolVals::activity, SCIP_Row::activity, SCIP_RowSolVals::basisstatus, SCIP_Row::basisstatus, BMSfreeBlockMemoryNull, SCIP_Row::dualfarkas, SCIP_RowSolVals::dualsol, SCIP_Row::dualsol, NULL, SCIP_BASESTAT_BASIC, SCIP_INVALID, SCIP_OKAY, SCIP_Row::storedsolvals, and SCIP_Row::validactivitylp.
Referenced by SCIPlpEndDive().
| SCIP_RETCODE SCIProwEnsureSize | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| int | num | ||
| ) |
ensures, that column array of row can store at least num entries
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| num | minimum number of entries to store |
Definition at line 586 of file lp.c.
References BMSreallocBlockMemoryArray, checkRow, SCIP_Row::cols, SCIP_Row::cols_index, FALSE, SCIP_Col::index, SCIP_Row::len, SCIP_Row::linkpos, SCIP_Row::lpcolssorted, SCIP_Row::nlpcols, SCIP_Row::nonlpcolssorted, NULL, SCIP_ALLOC, SCIP_Bool, SCIP_OKAY, SCIPsetCalcMemGrowSize(), SCIP_Row::size, TRUE, and SCIP_Row::vals.
Referenced by rowAddCoef(), SCIPaddVarsToRow(), and SCIPaddVarsToRowSameCoef().
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
Definition at line 736 of file lp.c.
References SCIP_Lp::looseobjval, SCIP_Lp::looseobjvalid, NULL, SCIP_Prob::nvars, SCIP_Lp::rellooseobjval, SCIP_Real, SCIP_VARSTATUS_LOOSE, SCIPsetIsInfinity(), SCIPsetIsNegative(), SCIPsetIsPositive(), SCIPvarGetLbLocal(), SCIPvarGetObj(), SCIPvarGetStatus(), SCIPvarGetUbLocal(), TRUE, and SCIP_Prob::vars.
Referenced by getFiniteLooseObjval(), and SCIPlpGetObjval().
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
Definition at line 778 of file lp.c.
References NULL, SCIP_Prob::nvars, SCIP_Lp::pseudoobjval, SCIP_Lp::pseudoobjvalid, SCIP_Lp::relpseudoobjval, SCIPsetIsInfinity(), SCIPsetIsNegative(), SCIPsetIsPositive(), SCIPvarGetLbLocal(), SCIPvarGetObj(), SCIPvarGetUbLocal(), TRUE, and SCIP_Prob::vars.
Referenced by getFinitePseudoObjval(), and SCIPlpGetPseudoObjval().
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| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
Definition at line 820 of file lp.c.
References SCIP_Lp::glbpseudoobjval, SCIP_Lp::glbpseudoobjvalid, NULL, SCIP_Prob::nvars, SCIP_Lp::relglbpseudoobjval, SCIPsetIsInfinity(), SCIPsetIsNegative(), SCIPsetIsPositive(), SCIPvarGetLbGlobal(), SCIPvarGetObj(), SCIPvarGetUbGlobal(), TRUE, and SCIP_Prob::vars.
Referenced by SCIPlpGetGlobalPseudoObjval().
gets finite part of objective value of current LP that results from LOOSE variables only
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
Definition at line 862 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::looseobjval, SCIP_Lp::looseobjvalid, SCIP_Lp::looseobjvalinf, SCIP_Lp::nloosevars, NULL, and recomputeLooseObjectiveValue().
Referenced by lpSolve(), lpSolveStable(), SCIPcolGetStrongbranch(), SCIPcolGetStrongbranches(), SCIPlpComputeRelIntPoint(), SCIPlpGetLooseObjval(), and SCIPlpSolveAndEval().
gets finite part of pseudo objective value of current LP
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
Definition at line 884 of file lp.c.
References NULL, SCIP_Lp::pseudoobjval, SCIP_Lp::pseudoobjvalid, and recomputePseudoObjectiveValue().
Referenced by SCIPlpGetModifiedPseudoObjval().
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sorts column entries of linked rows currently in the LP such that lower row indices precede higher ones
| col | column to be sorted |
Definition at line 926 of file lp.c.
References SCIP_Row::cols, SCIP_Col::linkpos, SCIP_Row::linkpos, SCIP_Col::lprowssorted, SCIP_Col::nlprows, NULL, SCIP_Col::rows, SCIPsortPtrRealInt(), TRUE, and SCIP_Col::vals.
Referenced by colSearchCoef(), and SCIPcolSort().
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sorts column entries of unlinked rows or rows currently not in the LP such that lower row indices precede higher ones
| col | column to be sorted |
Definition at line 959 of file lp.c.
References SCIP_Row::cols, SCIP_Col::len, SCIP_Col::linkpos, SCIP_Row::linkpos, SCIP_Col::nlprows, SCIP_Col::nonlprowssorted, NULL, SCIP_Col::rows, SCIPsortPtrRealInt(), TRUE, and SCIP_Col::vals.
Referenced by colSearchCoef(), and SCIPcolSort().
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sorts row entries of linked columns currently in the LP such that lower column indices precede higher ones
| row | row to be sorted |
Definition at line 990 of file lp.c.
References SCIP_Row::cols, SCIP_Row::cols_index, SCIP_Row::delaysort, SCIP_Col::linkpos, SCIP_Row::linkpos, SCIP_Row::lpcolssorted, SCIP_Row::nlpcols, NULL, SCIP_Col::rows, SCIPsortIntPtrIntReal(), TRUE, and SCIP_Row::vals.
Referenced by rowSearchCoef(), SCIPlpComputeRelIntPoint(), and SCIProwSort().
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sorts row entries of unlinked columns or columns currently not in the LP such that lower column indices precede higher ones
| row | row to be sorted |
Definition at line 1023 of file lp.c.
References checkRow, SCIP_Row::cols, SCIP_Row::cols_index, SCIP_Row::delaysort, SCIP_Row::len, SCIP_Col::linkpos, SCIP_Row::linkpos, SCIP_Row::nlpcols, SCIP_Row::nonlpcolssorted, NULL, SCIP_Col::rows, SCIPsortIntPtrIntReal(), TRUE, and SCIP_Row::vals.
Referenced by rowSearchCoef(), and SCIProwSort().
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searches coefficient in part of the column, returns position in col vector or -1 if not found
| col | column to be searched in |
| row | coefficient to be searched for |
| minpos | first position of search range |
| maxpos | last position of search range |
Definition at line 1058 of file lp.c.
References SCIP_Row::index, SCIP_Col::linkpos, SCIP_Row::lppos, NULL, and SCIP_Col::rows.
Referenced by colSearchCoef().
searches coefficient in column, returns position in col vector or -1 if not found
| col | column to be searched in |
| row | coefficient to be searched for |
Definition at line 1094 of file lp.c.
References colSearchCoefPart(), colSortLP(), colSortNonLP(), SCIP_Col::len, SCIP_Row::lppos, SCIP_Col::lprowssorted, SCIP_Col::nlprows, SCIP_Col::nonlprowssorted, NULL, and SCIP_Col::nunlinked.
Referenced by SCIPcolChgCoef(), SCIPcolDelCoef(), and SCIPcolIncCoef().
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searches coefficient in part of the row, returns position in col vector or -1 if not found
| row | row to be searched in |
| col | coefficient to be searched for |
| minpos | first position of search range |
| maxpos | last position of search range |
Definition at line 1133 of file lp.c.
References SCIP_Row::cols, SCIP_Row::cols_index, SCIP_Col::index, SCIP_Row::linkpos, SCIP_Col::lppos, and NULL.
Referenced by rowSearchCoef().
searches coefficient in row, returns position in row vector or -1 if not found; if the sorting of the row is delayed, returns -1
| row | row to be searched in |
| col | coefficient to be searched for |
Definition at line 1172 of file lp.c.
References SCIP_Row::cols, SCIP_Row::delaysort, SCIP_Row::len, SCIP_Row::lpcolssorted, SCIP_Col::lppos, SCIP_Row::nlpcols, SCIP_Row::nonlpcolssorted, NULL, SCIP_Row::nunlinked, rowSearchCoefPart(), rowSortLP(), and rowSortNonLP().
Referenced by SCIProwChgCoef(), SCIProwDelCoef(), and SCIProwIncCoef().
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moves a coefficient in a column to a different place, and updates all corresponding data structures
| col | LP column |
| oldpos | old position of coefficient |
| newpos | new position of coefficient |
Definition at line 1225 of file lp.c.
References SCIP_Row::cols, FALSE, SCIP_Col::linkpos, SCIP_Row::linkpos, SCIP_Row::lppos, SCIP_Col::lprowssorted, SCIP_Col::nonlprowssorted, NULL, SCIP_Col::rows, and SCIP_Col::vals.
Referenced by colAddCoef(), and colDelCoefPos().
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swaps two coefficients in a column, and updates all corresponding data structures
| col | LP column |
| pos1 | position of first coefficient |
| pos2 | position of second coefficient |
Definition at line 1261 of file lp.c.
References SCIP_Row::cols, FALSE, SCIP_Col::linkpos, SCIP_Row::linkpos, SCIP_Row::lppos, SCIP_Col::lprowssorted, SCIP_Col::nonlprowssorted, NULL, SCIP_Col::rows, SCIP_Real, and SCIP_Col::vals.
Referenced by rowAddCoef(), rowUpdateAddLP(), and rowUpdateDelLP().
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moves a coefficient in a row to a different place, and updates all corresponding data structures
| row | LP row |
| oldpos | old position of coefficient |
| newpos | new position of coefficient |
Definition at line 1321 of file lp.c.
References SCIP_Row::cols, SCIP_Row::cols_index, FALSE, SCIP_Col::linkpos, SCIP_Row::linkpos, SCIP_Row::lpcolssorted, SCIP_Col::lppos, SCIP_Row::nonlpcolssorted, NULL, SCIP_Col::rows, and SCIP_Row::vals.
Referenced by rowAddCoef(), and rowDelCoefPos().
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swaps two coefficients in a row, and updates all corresponding data structures
| row | LP row |
| pos1 | position of first coefficient |
| pos2 | position of second coefficient |
Definition at line 1358 of file lp.c.
References SCIP_Row::cols, SCIP_Row::cols_index, FALSE, SCIP_Col::index, SCIP_Col::linkpos, SCIP_Row::linkpos, SCIP_Row::lpcolssorted, SCIP_Col::lppos, SCIP_Row::nonlpcolssorted, NULL, SCIP_Col::rows, SCIP_Real, and SCIP_Row::vals.
Referenced by colAddCoef(), colUpdateAddLP(), and colUpdateDelLP().
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issues a ROWCOEFCHANGED event on the given row
| row | row which coefficient has changed |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| col | the column which coefficient has changed |
| oldval | old value of the coefficient |
| newval | new value of the coefficient |
Definition at line 1423 of file lp.c.
References SCIP_Row::eventfilter, SCIP_EventFilter::eventmask, SCIP_EventFilter::len, NULL, SCIP_CALL, SCIP_EVENTTYPE_ROWCOEFCHANGED, SCIP_OKAY, SCIPeventCreateRowCoefChanged(), and SCIPeventqueueAdd().
Referenced by rowAddCoef(), rowChgCoefPos(), and rowDelCoefPos().
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issues a ROWCONSTCHANGED event on the given row
| row | row which coefficient has changed |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| oldval | old value of the constant |
| newval | new value of the constant |
Definition at line 1453 of file lp.c.
References SCIP_Row::eventfilter, SCIP_EventFilter::eventmask, SCIP_EventFilter::len, NULL, SCIP_CALL, SCIP_EVENTTYPE_ROWCONSTCHANGED, SCIP_OKAY, SCIPeventCreateRowConstChanged(), and SCIPeventqueueAdd().
Referenced by SCIProwChgConstant().
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issues a ROWSIDECHANGED event on the given row
| row | row which coefficient has changed |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| side | the side that has changed |
| oldval | old value of side |
| newval | new value of side |
Definition at line 1481 of file lp.c.
References checkLinks, SCIP_Row::cols, SCIP_Lp::cols, SCIP_Row::dualfarkas, SCIP_Row::dualsol, EPSEQ, SCIP_Row::eventfilter, SCIP_EventFilter::eventmask, FALSE, SCIP_Col::farkascoef, SCIP_Lp::flushed, SCIP_Col::len, SCIP_EventFilter::len, SCIP_Row::len, SCIP_Col::linkpos, SCIP_Row::linkpos, SCIP_Lp::lpifirstchgcol, SCIP_Lp::lpifirstchgrow, SCIP_Col::lppos, SCIP_Row::lppos, SCIP_Lp::ncols, SCIP_Row::nlpcols, SCIP_Col::nlprows, SCIP_Lp::nrows, NULL, SCIP_Col::nunlinked, SCIP_Row::nunlinked, SCIP_Col::primsol, SCIP_Col::rows, SCIP_Lp::rows, SCIP_Bool, SCIP_CALL, SCIP_EVENTTYPE_ROWSIDECHANGED, SCIP_OKAY, SCIPeventCreateRowSideChanged(), SCIPeventqueueAdd(), TRUE, SCIP_Col::vals, and SCIP_Row::vals.
Referenced by SCIProwChgLhs(), and SCIProwChgRhs().
announces, that the given coefficient in the constraint matrix changed
| row | LP row |
| col | LP col |
| lp | current LP data |
Definition at line 1590 of file lp.c.
References SCIP_Col::coefchanged, SCIP_Row::coefchanged, FALSE, SCIP_Lp::flushed, SCIP_Lp::lpifirstchgcol, SCIP_Lp::lpifirstchgrow, SCIP_Col::lpipos, SCIP_Row::lpipos, SCIP_Row::maxactivity, SCIP_Row::minactivity, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, NULL, SCIP_Row::pseudoactivity, rowAddCoef(), SCIP_INVALID, SCIP_Real, TRUE, SCIP_Row::validactivitybdsdomchg, and SCIP_Row::validpsactivitydomchg.
Referenced by colAddCoef(), colChgCoefPos(), colDelCoefPos(), rowAddCoef(), rowChgCoefPos(), and rowDelCoefPos().
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adds a previously non existing coefficient to an LP row
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| col | LP column |
| val | value of coefficient |
| linkpos | position of row in the column's row array, or -1 |
Definition at line 1992 of file lp.c.
References coefChanged(), colAddCoef(), SCIP_Row::cols, SCIP_Row::cols_index, colSwapCoefs(), FALSE, SCIP_Col::index, SCIP_Row::integral, SCIP_Row::len, SCIP_Col::linkpos, SCIP_Row::linkpos, SCIP_Row::lpcolssorted, SCIP_Col::lppos, SCIP_Row::lppos, SCIP_Col::lprowssorted, SCIP_Row::name, SCIP_Row::nlocks, SCIP_Row::nlpcols, SCIP_Col::nlprows, SCIP_Row::nonlpcolssorted, NULL, SCIP_Col::nunlinked, SCIP_Row::nunlinked, rowAddNorms(), rowEventCoefChanged(), rowMoveCoef(), SCIP_Col::rows, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPcolIsIntegral(), SCIPerrorMessage, SCIProwEnsureSize(), SCIPsetDebugMsg, SCIPsetIsIntegral(), SCIPsetIsZero(), SCIPsetRound(), SCIPvarGetName(), SCIPvarGetProbindex(), TRUE, SCIP_Row::vals, SCIP_Col::var, and SCIP_Col::var_probindex.
Referenced by coefChanged(), colAddCoef(), colLink(), SCIProwAddCoef(), SCIProwChgCoef(), and SCIProwIncCoef().
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static |
adds a previously non existing coefficient to an LP column
| col | LP column |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| row | LP row |
| val | value of coefficient |
| linkpos | position of column in the row's col array, or -1 |
Definition at line 1655 of file lp.c.
References coefChanged(), colEnsureSize(), colMoveCoef(), SCIP_Row::cols, FALSE, SCIP_Row::index, SCIP_Col::len, SCIP_Col::linkpos, SCIP_Row::linkpos, SCIP_Row::lpcolssorted, SCIP_Col::lppos, SCIP_Row::lppos, SCIP_Col::lprowssorted, SCIP_Row::name, SCIP_Row::nlpcols, SCIP_Col::nlprows, SCIP_Col::nonlprowssorted, NULL, SCIP_Col::nunlinked, SCIP_Row::nunlinked, rowAddCoef(), SCIP_Col::rows, rowSwapCoefs(), SCIP_CALL, SCIP_OKAY, SCIPsetDebugMsg, SCIPsetIsIntegral(), SCIPsetIsZero(), SCIPsetRound(), SCIPvarGetName(), SCIP_Col::vals, and SCIP_Col::var.
Referenced by rowAddCoef(), rowLink(), SCIPcolAddCoef(), SCIPcolChgCoef(), and SCIPcolIncCoef().
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deletes coefficient at given position from column
| col | column to be changed |
| set | global SCIP settings |
| lp | current LP data |
| pos | position in column vector to delete |
Definition at line 1776 of file lp.c.
References coefChanged(), colMoveCoef(), SCIP_Row::cols, SCIP_Col::len, SCIP_Col::linkpos, SCIP_Row::lppos, SCIP_Col::nlprows, NULL, SCIP_Col::nunlinked, SCIP_Col::rows, SCIP_OKAY, and SCIP_Col::var.
Referenced by colChgCoefPos(), rowUnlink(), SCIPcolDelCoef(), and SCIProwDelCoef().
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changes a coefficient at given position of an LP column
| col | LP column |
| set | global SCIP settings |
| lp | current LP data |
| pos | position in column vector to change |
| val | value of coefficient |
Definition at line 1821 of file lp.c.
References coefChanged(), colDelCoefPos(), SCIP_Row::cols, SCIP_Col::linkpos, NULL, SCIP_Col::rows, SCIP_CALL, SCIP_OKAY, SCIPsetIsEQ(), SCIPsetIsIntegral(), SCIPsetIsZero(), SCIPsetRound(), SCIP_Col::vals, and SCIP_Col::var.
Referenced by rowScale(), SCIPcolChgCoef(), SCIPcolIncCoef(), SCIProwChgCoef(), and SCIProwIncCoef().
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update row norms after addition of coefficient
| row | LP row |
| set | global SCIP settings |
| col | column of added coefficient |
| val | value of added coefficient |
| updateidxvals | update min/max idx and min/max val? |
Definition at line 1865 of file lp.c.
References SCIP_Col::index, SCIP_Col::lppos, MAX, SCIP_Row::maxidx, SCIP_Row::maxval, MIN, SCIP_Row::minidx, SCIP_Row::minval, NULL, SCIP_Row::nummaxval, SCIP_Row::numminval, SCIP_Row::objprod, REALABS, SCIP_Real, SCIPsetIsGE(), SCIPsetIsGT(), SCIPsetIsLE(), SCIPsetIsLT(), SCIPsetIsZero(), SCIP_Row::sqrnorm, SCIP_Row::sumnorm, and SCIP_Col::unchangedobj.
Referenced by colUpdateAddLP(), rowAddCoef(), rowCalcNorms(), and rowChgCoefPos().
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update row norms after deletion of coefficient
| row | LP row |
| set | global SCIP settings |
| col | column of deleted coefficient |
| val | value of deleted coefficient |
| forcenormupdate | should the norms be updated even if lppos of column is -1? |
| updateindex | should the minimal/maximal column index of row be updated? |
| updateval | should the minimal/maximal value of row be updated? |
Definition at line 1934 of file lp.c.
References FALSE, SCIP_Col::index, SCIP_Col::lppos, MAX, SCIP_Row::maxidx, SCIP_Row::maxval, SCIP_Row::minidx, SCIP_Row::minval, NULL, SCIP_Row::nummaxval, SCIP_Row::numminval, SCIP_Row::objprod, REALABS, SCIP_Real, SCIPsetIsGE(), SCIPsetIsLE(), SCIPsetIsZero(), SCIP_Row::sqrnorm, SCIP_Row::sumnorm, SCIP_Col::unchangedobj, and SCIP_Row::validminmaxidx.
Referenced by colUpdateDelLP(), rowChgCoefPos(), and rowDelCoefPos().
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deletes coefficient at given position from row
| row | row to be changed |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| pos | position in row vector to delete |
Definition at line 2133 of file lp.c.
References coefChanged(), SCIP_Row::cols, FALSE, SCIP_Row::len, SCIP_Row::linkpos, SCIP_Row::lpcolssorted, SCIP_Col::lppos, SCIP_Row::name, SCIP_Row::nlocks, SCIP_Row::nlpcols, NULL, SCIP_Row::nunlinked, rowDelNorms(), rowEventCoefChanged(), rowMoveCoef(), SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_Real, SCIPerrorMessage, TRUE, and SCIP_Row::vals.
Referenced by colUnlink(), rowChgCoefPos(), SCIPcolDelCoef(), and SCIProwDelCoef().
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changes a coefficient at given position of an LP row
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| pos | position in row vector to change |
| val | value of coefficient |
Definition at line 2193 of file lp.c.
References coefChanged(), SCIP_Row::cols, FALSE, SCIP_Row::integral, SCIP_Row::name, SCIP_Row::nlocks, NULL, rowAddNorms(), rowDelCoefPos(), rowDelNorms(), rowEventCoefChanged(), SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_Real, SCIPcolIsIntegral(), SCIPerrorMessage, SCIPsetIsEQ(), SCIPsetIsIntegral(), SCIPsetIsZero(), SCIPsetRound(), TRUE, and SCIP_Row::vals.
Referenced by rowScale(), SCIPcolChgCoef(), SCIPcolIncCoef(), SCIProwChgCoef(), and SCIProwIncCoef().
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notifies LP row, that its sides were changed
| row | LP row |
| set | global SCIP settings |
| lp | current LP data |
| sidetype | type of side: left or right hand side |
Definition at line 2249 of file lp.c.
References SCIP_Lp::chgrows, ensureChgrowsSize(), FALSE, SCIP_Lp::flushed, SCIP_Row::lhschanged, SCIP_Row::lpipos, SCIP_Lp::nchgrows, NULL, SCIP_Row::rhschanged, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_SIDETYPE_LEFT, SCIP_SIDETYPE_RIGHT, SCIPABORT, SCIPerrorMessage, and TRUE.
Referenced by SCIProwChgConstant(), SCIProwChgLhs(), and SCIProwChgRhs().
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insert column coefficients in corresponding rows
| col | column data |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
Definition at line 2302 of file lp.c.
References checkLinks, SCIP_Row::cols, SCIP_Col::linkpos, SCIP_Row::linkpos, SCIP_Col::nlprows, NULL, SCIP_Col::nunlinked, rowAddCoef(), SCIP_Col::rows, SCIP_CALL, SCIP_OKAY, SCIPsetDebugMsg, SCIPsetIsZero(), SCIPvarGetName(), SCIP_Col::vals, and SCIP_Col::var.
Referenced by lpFlushAddCols().
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removes column coefficients from corresponding rows
| col | column data |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
Definition at line 2346 of file lp.c.
References checkLinks, SCIP_Row::cols, SCIP_Col::len, SCIP_Col::linkpos, NULL, SCIP_Col::nunlinked, rowDelCoefPos(), SCIP_Col::rows, SCIP_CALL, SCIP_OKAY, SCIPsetDebugMsg, SCIPvarGetName(), and SCIP_Col::var.
Referenced by SCIPcolFree().
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insert row coefficients in corresponding columns
| row | row data |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
Definition at line 2385 of file lp.c.
References checkLinks, colAddCoef(), SCIP_Row::cols, SCIP_Col::linkpos, SCIP_Row::linkpos, SCIP_Row::name, SCIP_Row::nlpcols, NULL, SCIP_Row::nunlinked, SCIP_Col::rows, SCIP_CALL, SCIP_OKAY, SCIPsetDebugMsg, SCIPsetIsZero(), and SCIP_Row::vals.
Referenced by lpFlushAddRows().
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removes row coefficients from corresponding columns
| row | row data |
| set | global SCIP settings |
| lp | current LP data |
Definition at line 2428 of file lp.c.
References colDelCoefPos(), SCIP_Row::cols, SCIP_Row::len, SCIP_Row::linkpos, SCIP_Row::name, NULL, SCIP_Row::nunlinked, SCIP_Col::rows, SCIP_CALL, SCIP_OKAY, and SCIPsetDebugMsg.
Referenced by SCIProwFree().
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sets parameter of type int in LP solver, ignoring unknown parameters
| lp | current LP data |
| lpparam | LP parameter |
| value | value to set parameter to |
| success | pointer to store whether the parameter was successfully changed |
Definition at line 2467 of file lp.c.
References FALSE, SCIP_Lp::lpi, NULL, SCIP_OKAY, SCIP_PARAMETERUNKNOWN, SCIPlpiSetIntpar(), and TRUE.
Referenced by lpSetBoolpar(), lpSetFastmip(), lpSetIterationLimit(), lpSetPricing(), lpSetRandomseed(), lpSetScaling(), lpSetSolutionPolishing(), lpSetThreads(), lpSetTiming(), and SCIPlpCreate().
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sets parameter of type SCIP_Bool in LP solver, ignoring unknown parameters
| lp | current LP data |
| lpparam | LP parameter |
| value | value to set parameter to |
| success | pointer to store whether the parameter was successfully changed |
Definition at line 2494 of file lp.c.
References lpSetIntpar().
Referenced by lpSetFromscratch(), lpSetLPInfo(), lpSetPresolving(), and SCIPlpCreate().
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sets parameter of type SCIP_Real in LP solver, ignoring unknown parameters
| lp | current LP data |
| lpparam | LP parameter |
| value | value to set parameter to |
| success | pointer to store whether the parameter was successfully changed |
Definition at line 2506 of file lp.c.
References FALSE, SCIP_Lp::lpi, NULL, SCIP_OKAY, SCIP_PARAMETERUNKNOWN, SCIPlpiSetRealpar(), and TRUE.
Referenced by lpAlgorithm(), lpSetBarrierconvtol(), lpSetConditionLimit(), lpSetDualfeastol(), lpSetFeastol(), lpSetRowrepswitch(), lpSetUobjlim(), and SCIPlpCreate().
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checks, that parameter of type int in LP solver has the given value, ignoring unknown parameters
| lp | current LP data |
| lpparam | LP parameter |
| value | value parameter should have |
Definition at line 2534 of file lp.c.
References SCIP_Lp::lpi, NULL, SCIP_OKAY, SCIP_PARAMETERUNKNOWN, and SCIPlpiGetIntpar().
Referenced by lpCheckBoolpar(), lpSetFastmip(), lpSetIterationLimit(), lpSetPricing(), lpSetScaling(), lpSetThreads(), and lpSetTiming().
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checks, that parameter of type SCIP_Bool in LP solver has the given value, ignoring unknown parameters
| lp | current LP data |
| lpparam | LP parameter |
| value | value parameter should have |
Definition at line 2559 of file lp.c.
References lpCheckIntpar().
Referenced by lpSetFromscratch(), lpSetLPInfo(), and lpSetPresolving().
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checks, that parameter of type SCIP_Real in LP solver has the given value, ignoring unknown parameters
| lp | current LP data |
| lpparam | LP parameter |
| value | value parameter should have |
Definition at line 2570 of file lp.c.
References SCIP_Lp::lpi, NULL, SCIP_OKAY, SCIP_PARAMETERUNKNOWN, SCIP_Real, and SCIPlpiGetRealpar().
Referenced by lpSetBarrierconvtol(), lpSetConditionLimit(), lpSetDualfeastol(), lpSetFeastol(), lpSetRowrepswitch(), and lpSetUobjlim().
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sets the upper objective limit of the LP solver
| lp | current LP data |
| set | global SCIP settings |
| uobjlim | new feasibility tolerance |
Definition at line 2603 of file lp.c.
References FALSE, lpCheckRealpar(), lpCutoffDisabled, SCIP_Lp::lpi, SCIP_Lp::lpiuobjlim, SCIP_Lp::lpobjval, lpSetRealpar(), SCIP_Lp::lpsolstat, NULL, SCIP_Lp::primalchecked, SCIP_Lp::primalfeasible, SCIP_Bool, SCIP_CALL, SCIP_INVALID, SCIP_LPPAR_UOBJLIM, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_OKAY, SCIPlpiInfinity(), SCIPsetIsInfinity(), and SCIP_Lp::solved.
Referenced by lpSolveStable().
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sets the feasibility tolerance of the LP solver
| lp | current LP data |
| feastol | new feasibility tolerance |
| success | pointer to store whether the parameter was successfully changed |
Definition at line 2646 of file lp.c.
References FALSE, lpCheckRealpar(), SCIP_Lp::lpifeastol, SCIP_Lp::lpobjval, lpSetRealpar(), SCIP_Lp::lpsolstat, SCIP_Lp::nrows, NULL, SCIP_Lp::primalchecked, SCIP_Lp::primalfeasible, SCIP_CALL, SCIP_INVALID, SCIP_LPPAR_FEASTOL, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_OKAY, and SCIP_Lp::solved.
Referenced by lpSolveStable().
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sets the reduced costs feasibility tolerance of the LP solver
| lp | current LP data |
| dualfeastol | new reduced costs feasibility tolerance |
| success | pointer to store whether the parameter was successfully changed |
Definition at line 2683 of file lp.c.
References SCIP_Lp::dualchecked, SCIP_Lp::dualfeasible, FALSE, lpCheckRealpar(), SCIP_Lp::lpidualfeastol, SCIP_Lp::lpobjval, lpSetRealpar(), SCIP_Lp::lpsolstat, SCIP_Lp::nrows, NULL, SCIP_CALL, SCIP_INVALID, SCIP_LPPAR_DUALFEASTOL, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_OKAY, and SCIP_Lp::solved.
Referenced by lpSolveStable().
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static |
sets the convergence tolerance used in barrier algorithm of the LP solver
| lp | current LP data |
| barrierconvtol | new convergence tolerance used in barrier algorithm |
| success | pointer to store whether the parameter was successfully changed |
Definition at line 2720 of file lp.c.
References SCIP_Lp::dualchecked, SCIP_Lp::dualfeasible, FALSE, SCIP_Lp::lastlpalgo, lpCheckRealpar(), SCIP_Lp::lpibarrierconvtol, SCIP_Lp::lpobjval, lpSetRealpar(), SCIP_Lp::lpsolstat, SCIP_Lp::nrows, NULL, SCIP_CALL, SCIP_INVALID, SCIP_LPALGO_BARRIER, SCIP_LPALGO_BARRIERCROSSOVER, SCIP_LPPAR_BARRIERCONVTOL, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_OKAY, and SCIP_Lp::solved.
Referenced by lpSolveStable().
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sets the FROMSCRATCH setting of the LP solver
| lp | current LP data |
| fromscratch | new FROMSCRATCH setting |
| success | pointer to store whether the parameter was successfully changed |
Definition at line 2758 of file lp.c.
References FALSE, lpCheckBoolpar(), SCIP_Lp::lpifromscratch, lpSetBoolpar(), NULL, SCIP_CALL, SCIP_LPPAR_FROMSCRATCH, and SCIP_OKAY.
Referenced by lpSolveStable(), and SCIPlpSolveAndEval().
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sets the FASTMIP setting of the LP solver
| lp | current LP data |
| fastmip | new FASTMIP setting |
| success | pointer to store whether the parameter was successfully changed |
Definition at line 2783 of file lp.c.
References FALSE, lpCheckIntpar(), SCIP_Lp::lpifastmip, lpSetIntpar(), NULL, SCIP_CALL, SCIP_LPPAR_FASTMIP, and SCIP_OKAY.
Referenced by lpSolveStable().
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sets the SCALING setting of the LP solver
| lp | current LP data |
| scaling | new SCALING setting |
| success | pointer to store whether the parameter was successfully changed |
Definition at line 2809 of file lp.c.
References FALSE, lpCheckIntpar(), SCIP_Lp::lpiscaling, lpSetIntpar(), NULL, SCIP_CALL, SCIP_LPPAR_SCALING, and SCIP_OKAY.
Referenced by lpSolveStable().
|
static |
sets the number of THREADS of the LP solver
| lp | current LP data |
| threads | new number of threads used to solve the LP |
| success | pointer to store whether the parameter was successfully changed |
Definition at line 2834 of file lp.c.
References FALSE, lpCheckIntpar(), SCIP_Lp::lpithreads, lpSetIntpar(), NULL, SCIP_CALL, SCIP_LPPAR_THREADS, and SCIP_OKAY.
Referenced by lpSolveStable().
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sets the PRESOLVING setting of the LP solver
| lp | current LP data |
| presolving | new PRESOLVING setting |
| success | pointer to store whether the parameter was successfully changed |
Definition at line 2859 of file lp.c.
References FALSE, lpCheckBoolpar(), SCIP_Lp::lpipresolving, lpSetBoolpar(), NULL, SCIP_CALL, SCIP_LPPAR_PRESOLVING, and SCIP_OKAY.
Referenced by lpSolveStable().
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sets the ROWREPSWITCH setting of the LP solver
| lp | current LP data |
| rowrepswitch | new ROWREPSWITCH value |
| success | pointer to store whether the parameter was successfully changed |
Definition at line 2884 of file lp.c.
References FALSE, lpCheckRealpar(), SCIP_Lp::lpirowrepswitch, lpSetRealpar(), NULL, SCIP_CALL, SCIP_LPPAR_ROWREPSWITCH, and SCIP_OKAY.
Referenced by lpSolveStable().
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static |
sets the iteration limit of the LP solver
| lp | current LP data |
| itlim | maximal number of LP iterations to perform, or -1 for no limit |
Definition at line 2909 of file lp.c.
References FALSE, lpCheckIntpar(), SCIP_Lp::lpiitlim, SCIP_Lp::lpobjval, lpSetIntpar(), SCIP_Lp::lpsolstat, NULL, SCIP_Bool, SCIP_CALL, SCIP_INVALID, SCIP_LPPAR_LPITLIM, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_OKAY, and SCIP_Lp::solved.
Referenced by lpSolveStable(), and SCIPlpEndDive().
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sets the pricing strategy of the LP solver
| lp | current LP data |
| pricing | pricing strategy |
Definition at line 2945 of file lp.c.
References lpCheckIntpar(), SCIP_Lp::lpipricing, lpSetIntpar(), NULL, SCIP_Bool, SCIP_CALL, SCIP_LPPAR_PRICING, and SCIP_OKAY.
Referenced by lpSetPricingChar().
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static |
sets the pricing strategy of the LP solver (given the character representation of the strategy)
| lp | current LP data |
| pricingchar | character representing the pricing strategy |
Definition at line 2968 of file lp.c.
References lpSetPricing(), SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_PRICING_AUTO, SCIP_PRICING_DEVEX, SCIP_PRICING_FULL, SCIP_PRICING_LPIDEFAULT, SCIP_PRICING_PARTIAL, SCIP_PRICING_STEEP, SCIP_PRICING_STEEPQSTART, and SCIPerrorMessage.
Referenced by lpSolveStable().
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static |
sets the verbosity of the LP solver
| lp | current LP data |
| lpinfo | should the LP solver display status messages? |
Definition at line 3010 of file lp.c.
References lpCheckBoolpar(), SCIP_Lp::lpilpinfo, lpSetBoolpar(), NULL, SCIP_Bool, SCIP_CALL, SCIP_LPPAR_LPINFO, and SCIP_OKAY.
Referenced by lpSolveStable().
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static |
sets the CONDITIONLIMIT setting of the LP solver
| lp | current LP data |
| condlimit | new CONDITIONLIMIT value |
| success | pointer to store whether the parameter was successfully changed |
Definition at line 3033 of file lp.c.
References FALSE, lpCheckRealpar(), SCIP_Lp::lpiconditionlimit, lpSetRealpar(), NULL, SCIP_CALL, SCIP_LPPAR_CONDITIONLIMIT, and SCIP_OKAY.
Referenced by lpSolveStable().
|
static |
sets the type of timer of the LP solver
| lp | current LP data |
| timing | new timing value |
| enabled | is timing enabled? |
| success | pointer to store whether the parameter was successfully changed |
Definition at line 3058 of file lp.c.
References FALSE, lpCheckIntpar(), SCIP_Lp::lpitiming, lpSetIntpar(), NULL, SCIP_CALL, SCIP_CLOCKTYPE_CPU, SCIP_CLOCKTYPE_WALL, SCIP_LPPAR_TIMING, and SCIP_OKAY.
Referenced by lpSolveStable().
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static |
sets the initial random seed of the LP solver
| lp | current LP data |
| randomseed | new initial random seed |
| success | pointer to store whether the parameter was successfully changed |
Definition at line 3092 of file lp.c.
References FALSE, SCIP_Lp::lpirandomseed, lpSetIntpar(), NULL, SCIP_CALL, SCIP_LPPAR_RANDOMSEED, SCIP_OKAY, and TRUE.
Referenced by lpSolveStable().
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sets the LP solution polishing method
| lp | current LP data |
| polishing | LP solution polishing activated (0: disabled, 1: enabled) |
| success | pointer to store whether the parameter was successfully changed |
Definition at line 3122 of file lp.c.
References FALSE, SCIP_Lp::lpisolutionpolishing, lpSetIntpar(), NULL, SCIP_CALL, SCIP_LPPAR_POLISHING, and SCIP_OKAY.
Referenced by lpSolveStable().
| SCIP_RETCODE SCIPcolCreate | ( | SCIP_COL ** | col, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_VAR * | var, | ||
| int | len, | ||
| SCIP_ROW ** | rows, | ||
| SCIP_Real * | vals, | ||
| SCIP_Bool | removable | ||
| ) |
creates an LP column
| col | pointer to column data |
| blkmem | block memory |
| set | global SCIP settings |
| stat | problem statistics |
| var | variable, this column represents |
| len | number of nonzeros in the column |
| rows | array with rows of column entries |
| vals | array with coefficients of column entries |
| removable | should the column be removed from the LP due to aging or cleanup? |
Definition at line 3148 of file lp.c.
References BMSallocBlockMemory, BMSallocBlockMemoryArray, BMSduplicateBlockMemoryArray, FALSE, SCIP_Stat::ncolidx, NULL, SCIP_Var::obj, SCIP_ALLOC, SCIP_BASESTAT_ZERO, SCIP_INVALID, SCIP_OKAY, SCIPsetIsZero(), SCIPstatIncrement, SCIPvarGetLbLazy(), SCIPvarGetLbLocal(), SCIPvarGetObj(), SCIPvarGetProbindex(), SCIPvarGetUbLazy(), SCIPvarGetUbLocal(), SCIPvarGetUnchangedObj(), SCIPvarIsIntegral(), and TRUE.
Referenced by SCIPvarColumn().
| SCIP_RETCODE SCIPcolFree | ( | SCIP_COL ** | col, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp | ||
| ) |
frees an LP column
| col | pointer to LP column |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
Definition at line 3246 of file lp.c.
References BMSfreeBlockMemory, BMSfreeBlockMemoryArrayNull, BMSfreeBlockMemoryNull, colUnlink(), NULL, SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, and SCIPvarGetStatus().
Referenced by SCIPvarLoose(), and varFree().
| void SCIPcolPrint | ( | SCIP_COL * | col, |
| SCIP_MESSAGEHDLR * | messagehdlr, | ||
| FILE * | file | ||
| ) |
output column to file stream
| col | LP column |
| messagehdlr | message handler |
| file | output file (or NULL for standard output) |
Definition at line 3276 of file lp.c.
References SCIP_Col::lb, SCIP_Col::len, SCIP_Row::name, NULL, SCIP_Col::obj, SCIP_Col::rows, SCIPmessageFPrintInfo(), SCIP_Col::ub, SCIP_Col::vals, and SCIP_Col::var.
| SCIP_RETCODE SCIPcolAddCoef | ( | SCIP_COL * | col, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_ROW * | row, | ||
| SCIP_Real | val | ||
| ) |
adds a previously non existing coefficient to an LP column
| col | LP column |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| row | LP row |
| val | value of coefficient |
Definition at line 3316 of file lp.c.
References checkLinks, colAddCoef(), SCIP_Lp::diving, NULL, SCIP_CALL, and SCIP_OKAY.
| SCIP_RETCODE SCIPcolDelCoef | ( | SCIP_COL * | col, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_ROW * | row | ||
| ) |
deletes existing coefficient from column
| col | column to be changed |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| row | coefficient to be deleted |
Definition at line 3337 of file lp.c.
References checkLinks, colDelCoefPos(), SCIP_Row::cols, SCIP_Row::cols_index, colSearchCoef(), SCIP_Lp::diving, SCIP_Col::index, SCIP_Col::linkpos, SCIP_Row::name, NULL, rowDelCoefPos(), SCIP_Col::rows, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPerrorMessage, SCIPsetIsEQ(), SCIPvarGetName(), SCIP_Col::vals, SCIP_Row::vals, and SCIP_Col::var.
| SCIP_RETCODE SCIPcolChgCoef | ( | SCIP_COL * | col, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_ROW * | row, | ||
| SCIP_Real | val | ||
| ) |
changes or adds a coefficient to an LP column
| col | LP column |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| row | LP row |
| val | value of coefficient |
Definition at line 3382 of file lp.c.
References checkLinks, colAddCoef(), colChgCoefPos(), SCIP_Row::cols, SCIP_Row::cols_index, colSearchCoef(), SCIP_Lp::diving, SCIP_Col::index, SCIP_Col::linkpos, NULL, rowChgCoefPos(), SCIP_Col::rows, SCIP_CALL, SCIP_OKAY, SCIPsetIsEQ(), SCIP_Col::vals, and SCIP_Row::vals.
| SCIP_RETCODE SCIPcolIncCoef | ( | SCIP_COL * | col, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_ROW * | row, | ||
| SCIP_Real | incval | ||
| ) |
increases value of an existing or non-existing coefficient in an LP column
| col | LP column |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| row | LP row |
| incval | value to add to the coefficient |
Definition at line 3433 of file lp.c.
References checkLinks, colAddCoef(), colChgCoefPos(), SCIP_Row::cols, SCIP_Row::cols_index, colSearchCoef(), SCIP_Lp::diving, SCIP_Col::index, SCIP_Col::linkpos, NULL, rowChgCoefPos(), SCIP_Col::rows, SCIP_CALL, SCIP_OKAY, SCIPsetIsEQ(), SCIPsetIsZero(), SCIP_Col::vals, and SCIP_Row::vals.
|
static |
insert column in the chgcols list (if not already there)
| col | LP column to change |
| set | global SCIP settings |
| lp | current LP data |
Definition at line 3488 of file lp.c.
References SCIP_Lp::chgcols, ensureChgcolsSize(), FALSE, SCIP_Lp::flushed, SCIP_Col::lbchanged, SCIP_Lp::nchgcols, SCIP_Col::objchanged, SCIP_CALL, SCIP_OKAY, and SCIP_Col::ubchanged.
Referenced by SCIPcolChgLb(), SCIPcolChgObj(), SCIPcolChgUb(), and updateLazyBounds().
|
static |
Is the new value reliable or may we have cancellation?
| set | global SCIP settings |
| newvalue | new value |
| oldvalue | old reliable value |
Definition at line 3513 of file lp.c.
References NULL, REALABS, SCIP_INVALID, SCIP_Real, and SCIPsetIsZero().
Referenced by lpUpdateObjNorms().
|
static |
update norms of objective function vector
| lp | current LP data |
| set | global SCIP settings |
| oldobj | old objective value of variable |
| newobj | new objective value of variable |
Definition at line 3531 of file lp.c.
References isNewValueUnreliable(), MAX, SCIP_Lp::objsqrnorm, SCIP_Lp::objsqrnormunreliable, SCIP_Lp::objsumnorm, REALABS, SCIP_Real, SCIPsetIsGE(), SCIPsetIsLT(), and TRUE.
Referenced by lpDelColset(), SCIPcolChgObj(), SCIPlpAddCol(), and SCIPlpShrinkCols().
| SCIP_RETCODE SCIPcolChgObj | ( | SCIP_COL * | col, |
| SCIP_SET * | set, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | newobj | ||
| ) |
changes objective value of column
| col | LP column to change |
| set | global SCIP settings |
| lp | current LP data |
| newobj | new objective value |
Definition at line 3567 of file lp.c.
References SCIP_Lp::divingobjchg, FALSE, SCIP_Lp::flushed, insertColChgcols(), SCIP_Col::lb, SCIP_Col::lpipos, lpUpdateObjNorms(), SCIP_Lp::nchgcols, NULL, SCIP_Col::obj, SCIP_Col::objchanged, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPsetDebugMsg, SCIPsetIsEQ(), SCIPsetIsZero(), SCIPvarGetCol(), SCIPvarGetName(), SCIPvarGetStatus(), SCIPvarGetUnchangedObj(), TRUE, SCIP_Col::ub, SCIP_Col::unchangedobj, and SCIP_Col::var.
Referenced by SCIPeventProcess(), SCIPlpEndDive(), and SCIPvarChgObjDive().
| SCIP_RETCODE SCIPcolChgLb | ( | SCIP_COL * | col, |
| SCIP_SET * | set, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | newlb | ||
| ) |
changes lower bound of column
| col | LP column to change |
| set | global SCIP settings |
| lp | current LP data |
| newlb | new lower bound value |
Definition at line 3626 of file lp.c.
References FALSE, SCIP_Lp::flushed, insertColChgcols(), SCIP_Col::lb, SCIP_Col::lbchanged, SCIP_Col::lpipos, SCIP_Lp::nchgcols, NULL, SCIP_Col::obj, SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIPsetDebugMsg, SCIPsetIsEQ(), SCIPsetIsZero(), SCIPvarGetCol(), SCIPvarGetName(), SCIPvarGetStatus(), TRUE, and SCIP_Col::var.
Referenced by SCIPeventProcess(), SCIPlpEndDive(), and SCIPvarChgLbDive().
| SCIP_RETCODE SCIPcolChgUb | ( | SCIP_COL * | col, |
| SCIP_SET * | set, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | newub | ||
| ) |
changes upper bound of column
| col | LP column to change |
| set | global SCIP settings |
| lp | current LP data |
| newub | new upper bound value |
Definition at line 3671 of file lp.c.
References FALSE, SCIP_Lp::flushed, insertColChgcols(), SCIP_Col::lpipos, SCIP_Lp::nchgcols, NULL, SCIP_Col::obj, SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIPsetDebugMsg, SCIPsetIsEQ(), SCIPsetIsZero(), SCIPvarGetCol(), SCIPvarGetName(), SCIPvarGetStatus(), TRUE, SCIP_Col::ub, SCIP_Col::ubchanged, and SCIP_Col::var.
Referenced by SCIPeventProcess(), SCIPlpEndDive(), and SCIPvarChgUbDive().
calculates the reduced costs of a column using the given dual solution vector
| col | LP column |
| dualsol | dual solution vector for current LP rows |
Definition at line 3716 of file lp.c.
References SCIP_Col::linkpos, SCIP_Row::lppos, SCIP_Col::nlprows, NULL, SCIP_Col::nunlinked, SCIP_Col::obj, SCIP_Col::rows, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPvarGetCol(), SCIPvarGetStatus(), SCIP_Col::vals, and SCIP_Col::var.
Referenced by undoBdchgsDualsol().
calculates the reduced costs of a column using the dual solution stored in the rows
| col | LP column |
Definition at line 3768 of file lp.c.
References SCIP_Row::dualsol, SCIP_Col::linkpos, SCIP_Row::lppos, SCIP_Col::nlprows, NULL, SCIP_Col::nunlinked, SCIP_Col::obj, SCIP_Col::rows, SCIP_INVALID, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPvarGetCol(), SCIPvarGetStatus(), SCIP_Col::vals, and SCIP_Col::var.
Referenced by SCIPcolGetRedcost().
gets the reduced costs of a column in last LP or after recalculation
| col | LP column |
| stat | problem statistics |
| lp | current LP data |
Definition at line 3821 of file lp.c.
References colCalcInternalRedcost(), SCIP_Stat::lpcount, NULL, SCIP_Col::redcost, SCIP_INVALID, SCIP_Col::validredcostlp, and SCIP_Lp::validsollp.
Referenced by getImplVarRedcost(), SCIPcolGetFeasibility(), SCIPgetColRedcost(), SCIPprobUpdateBestRootSol(), and SCIPvarGetImplRedcost().
gets the feasibility of (the dual row of) a column in last LP or after recalculation
| col | LP column |
| set | global SCIP settings |
| stat | problem statistics |
| lp | current LP data |
Definition at line 3845 of file lp.c.
References SCIP_Col::lb, SCIP_Stat::lpcount, NULL, REALABS, SCIP_Real, SCIPcolGetRedcost(), SCIPsetInfinity(), SCIPsetIsEQ(), SCIPsetIsNegative(), SCIPsetIsPositive(), SCIP_Col::ub, and SCIP_Lp::validsollp.
Referenced by SCIPpricestoreAddProbVars().
calculates the Farkas coefficient y^T A_i of a column i using the given dual Farkas vector y
| col | LP column |
| dualfarkas | dense dual Farkas vector for current LP rows |
Definition at line 3899 of file lp.c.
References SCIP_Col::linkpos, SCIP_Row::lppos, SCIP_Col::nlprows, NULL, SCIP_Col::nunlinked, SCIP_Col::rows, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPvarGetCol(), SCIPvarGetStatus(), SCIP_Col::vals, and SCIP_Col::var.
gets the Farkas coefficient y^T A_i of a column i in last LP (which must be infeasible)
| col | LP column |
Definition at line 3951 of file lp.c.
References SCIP_Row::dualfarkas, SCIP_Col::linkpos, SCIP_Row::lppos, SCIP_Col::nlprows, NULL, SCIP_Col::nunlinked, SCIP_Col::rows, SCIP_INVALID, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPvarGetCol(), SCIPvarGetStatus(), SCIP_Col::vals, and SCIP_Col::var.
Referenced by SCIPcolGetFarkasCoef().
gets the Farkas coefficient of a column in last LP (which must be infeasible)
| col | LP column |
| stat | problem statistics |
| lp | current LP data |
Definition at line 4004 of file lp.c.
References colCalcInternalFarkasCoef(), SCIP_Col::farkascoef, SCIP_Stat::lpcount, NULL, SCIP_INVALID, SCIP_Col::validfarkaslp, and SCIP_Lp::validfarkaslp.
Referenced by SCIPcolGetFarkasValue(), and SCIPgetColFarkasCoef().
gets the Farkas value of a column in last LP (which must be infeasible), i.e. the Farkas coefficient y^T A_i times the best bound for this coefficient, i.e. max{y^T A_i x_i | lb <= x_i <= ub}
| col | LP column |
| stat | problem statistics |
| lp | current LP data |
Definition at line 4030 of file lp.c.
References SCIP_Col::lb, NULL, SCIP_Real, SCIPcolGetFarkasCoef(), and SCIP_Col::ub.
Referenced by SCIPpricestoreAddProbVars().
| SCIP_RETCODE SCIPlpStartStrongbranch | ( | SCIP_LP * | lp | ) |
start strong branching - call before any strong branching
| lp | LP data |
Definition at line 4049 of file lp.c.
References SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPlpiStartStrongbranch(), SCIP_Lp::strongbranching, and TRUE.
Referenced by SCIPstartStrongbranch().
| SCIP_RETCODE SCIPlpEndStrongbranch | ( | SCIP_LP * | lp | ) |
end strong branching - call after any strong branching
| lp | LP data |
Definition at line 4064 of file lp.c.
References FALSE, SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPlpiEndStrongbranch(), and SCIP_Lp::strongbranching.
Referenced by SCIPendStrongbranch().
| void SCIPcolSetStrongbranchData | ( | SCIP_COL * | col, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | lpobjval, | ||
| SCIP_Real | primsol, | ||
| SCIP_Real | sbdown, | ||
| SCIP_Real | sbup, | ||
| SCIP_Bool | sbdownvalid, | ||
| SCIP_Bool | sbupvalid, | ||
| SCIP_Longint | iter, | ||
| int | itlim | ||
| ) |
sets strong branching information for a column variable
| col | LP column |
| set | global SCIP settings |
| stat | dynamic problem statistics |
| lp | LP data |
| lpobjval | objective value of the current LP |
| primsol | primal solution value of the column in the current LP |
| sbdown | dual bound after branching column down |
| sbup | dual bound after branching column up |
| sbdownvalid | is the returned down value a valid dual bound? |
| sbupvalid | is the returned up value a valid dual bound? |
| iter | total number of strong branching iterations |
| itlim | iteration limit applied to the strong branching call |
Definition at line 4079 of file lp.c.
References SCIP_Lp::cols, SCIP_Lp::cutoffbound, SCIP_Stat::lpcount, SCIP_Col::lpipos, SCIP_Col::lppos, MIN, SCIP_Lp::ncols, SCIP_Stat::nnodes, SCIP_Col::nsbcalls, SCIP_Stat::nsbdivinglps, NULL, SCIP_Col::sbdown, SCIP_Col::sbdownvalid, SCIP_Col::sbitlim, SCIP_Col::sblpobjval, SCIP_Col::sbnode, SCIP_Col::sbsolval, SCIP_Col::sbup, SCIP_Col::sbupvalid, SCIP_VARSTATUS_COLUMN, SCIPcolIsIntegral(), SCIPstatAdd, SCIPstatIncrement, SCIPvarGetCol(), SCIPvarGetStatus(), SCIPvarIsIntegral(), SCIP_Lp::strongbranchprobing, SCIP_Col::validsblp, and SCIP_Col::var.
Referenced by SCIPgetVarStrongbranchWithPropagation().
| void SCIPcolInvalidateStrongbranchData | ( | SCIP_COL * | col, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_LP * | lp | ||
| ) |
invalidates strong branching information for a column variable
| col | LP column |
| set | global SCIP settings |
| stat | dynamic problem statistics |
| lp | LP data |
Definition at line 4133 of file lp.c.
References SCIP_Lp::cols, FALSE, SCIP_Col::lpipos, SCIP_Col::lppos, SCIP_Lp::ncols, NULL, SCIP_Col::sbdown, SCIP_Col::sbdownvalid, SCIP_Col::sbitlim, SCIP_Col::sblpobjval, SCIP_Col::sbnode, SCIP_Col::sbsolval, SCIP_Col::sbup, SCIP_Col::sbupvalid, SCIP_INVALID, SCIP_VARSTATUS_COLUMN, SCIPcolIsIntegral(), SCIPvarGetCol(), SCIPvarGetStatus(), SCIPvarIsIntegral(), SCIP_Lp::strongbranchprobing, SCIP_Col::validsblp, and SCIP_Col::var.
Referenced by SCIPgetVarStrongbranchWithPropagation().
| SCIP_RETCODE SCIPcolGetStrongbranch | ( | SCIP_COL * | col, |
| SCIP_Bool | integral, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_PROB * | prob, | ||
| SCIP_LP * | lp, | ||
| int | itlim, | ||
| SCIP_Real * | down, | ||
| SCIP_Real * | up, | ||
| SCIP_Bool * | downvalid, | ||
| SCIP_Bool * | upvalid, | ||
| SCIP_Bool * | lperror | ||
| ) |
gets strong branching information on a column variable
| col | LP column |
| integral | should integral strong branching be performed? |
| set | global SCIP settings |
| stat | dynamic problem statistics |
| prob | problem data |
| lp | LP data |
| itlim | iteration limit for strong branchings |
| down | stores dual bound after branching column down |
| up | stores dual bound after branching column up |
| downvalid | stores whether the returned down value is a valid dual bound, or NULL; otherwise, it can only be used as an estimate value |
| upvalid | stores whether the returned up value is a valid dual bound, or NULL; otherwise, it can only be used as an estimate value |
| lperror | pointer to store whether an unresolved LP error occurred |
Definition at line 4168 of file lp.c.
References SCIP_Lp::cols, SCIP_Lp::cutoffbound, FALSE, SCIP_Lp::flushed, getFiniteLooseObjval(), SCIP_Lp::looseobjvalinf, SCIP_Stat::lpcount, SCIP_Lp::lpi, SCIP_Col::lpipos, SCIP_Lp::lpobjval, SCIP_Col::lppos, SCIP_Lp::lpsolstat, MIN, SCIP_Lp::ncols, SCIP_Stat::nduallpiterations, SCIP_Stat::nduallps, SCIP_Stat::ndualresolvelpiterations, SCIP_Stat::ndualresolvelps, SCIP_Stat::nnodes, SCIP_Stat::nprimallpiterations, SCIP_Stat::nprimallps, SCIP_Stat::nprimalresolvelpiterations, SCIP_Stat::nprimalresolvelps, SCIP_Col::nsbcalls, SCIP_Stat::nsbdivinglps, NULL, SCIP_Col::primsol, SCIP_Col::sbdown, SCIP_Col::sbdownvalid, SCIP_Col::sbitlim, SCIP_Col::sblpobjval, SCIP_Col::sbnode, SCIP_Col::sbsolval, SCIP_Col::sbup, SCIP_Col::sbupvalid, SCIP_Bool, SCIP_CALL, SCIP_INVALID, SCIP_LPERROR, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPclockStart(), SCIPclockStop(), SCIPcolIsIntegral(), SCIPlpGetObjval(), SCIPlpiStrongbranchFrac(), SCIPlpiStrongbranchInt(), SCIPsetDebugMsg, SCIPsetInfinity(), SCIPsetIsFeasIntegral(), SCIPsetIsIntegral(), SCIPstatAdd, SCIPstatIncrement, SCIPvarGetCol(), SCIPvarGetName(), SCIPvarGetStatus(), SCIPvarIsIntegral(), SCIP_Lp::solved, SCIP_Lp::strongbranching, SCIP_Stat::strongbranchtime, TRUE, SCIP_Col::validsblp, SCIP_Lp::validsollp, and SCIP_Col::var.
Referenced by SCIPgetVarStrongbranchFrac(), and SCIPgetVarStrongbranchInt().
| SCIP_RETCODE SCIPcolGetStrongbranches | ( | SCIP_COL ** | cols, |
| int | ncols, | ||
| SCIP_Bool | integral, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_PROB * | prob, | ||
| SCIP_LP * | lp, | ||
| int | itlim, | ||
| SCIP_Real * | down, | ||
| SCIP_Real * | up, | ||
| SCIP_Bool * | downvalid, | ||
| SCIP_Bool * | upvalid, | ||
| SCIP_Bool * | lperror | ||
| ) |
gets strong branching information on column variables
| cols | LP columns |
| ncols | number of columns |
| integral | should integral strong branching be performed? |
| set | global SCIP settings |
| stat | dynamic problem statistics |
| prob | problem data |
| lp | LP data |
| itlim | iteration limit for strong branchings |
| down | stores dual bounds after branching columns down |
| up | stores dual bounds after branching columns up |
| downvalid | stores whether the returned down values are valid dual bounds, or NULL; otherwise, they can only be used as an estimate value |
| upvalid | stores whether the returned up values are valid dual bounds, or NULL; otherwise, they can only be used as an estimate value |
| lperror | pointer to store whether an unresolved LP error occurred |
Definition at line 4327 of file lp.c.
References SCIP_Lp::cols, SCIP_Lp::cutoffbound, FALSE, SCIP_Lp::flushed, getFiniteLooseObjval(), SCIP_Lp::looseobjvalinf, SCIP_Stat::lpcount, SCIP_Lp::lpi, SCIP_Col::lpipos, SCIP_Col::lppos, SCIP_Lp::lpsolstat, MIN, SCIP_Lp::ncols, SCIP_Stat::nduallpiterations, SCIP_Stat::nduallps, SCIP_Stat::ndualresolvelpiterations, SCIP_Stat::ndualresolvelps, SCIP_Stat::nnodes, SCIP_Stat::nprimallpiterations, SCIP_Stat::nprimallps, SCIP_Stat::nprimalresolvelpiterations, SCIP_Stat::nprimalresolvelps, SCIP_Col::nsbcalls, SCIP_Stat::nsbdivinglps, NULL, SCIP_Col::primsol, SCIP_Col::sbdown, SCIP_Col::sbdownvalid, SCIP_Col::sbitlim, SCIP_Col::sblpobjval, SCIP_Col::sbnode, SCIP_Col::sbsolval, SCIP_Col::sbup, SCIP_Col::sbupvalid, SCIP_Bool, SCIP_CALL, SCIP_INVALID, SCIP_LPERROR, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPclockStart(), SCIPclockStop(), SCIPcolIsIntegral(), SCIPlpGetObjval(), SCIPlpiStrongbranchesFrac(), SCIPlpiStrongbranchesInt(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPsetInfinity(), SCIPsetIsFeasIntegral(), SCIPstatAdd, SCIPvarGetCol(), SCIPvarGetStatus(), SCIPvarIsIntegral(), SCIP_Lp::solved, SCIP_Stat::strongbranchtime, TRUE, SCIP_Col::validsblp, SCIP_Lp::validsollp, and SCIP_Col::var.
Referenced by SCIPgetVarsStrongbranchesFrac(), and SCIPgetVarsStrongbranchesInt().
| void SCIPcolGetStrongbranchLast | ( | SCIP_COL * | col, |
| SCIP_Real * | down, | ||
| SCIP_Real * | up, | ||
| SCIP_Bool * | downvalid, | ||
| SCIP_Bool * | upvalid, | ||
| SCIP_Real * | solval, | ||
| SCIP_Real * | lpobjval | ||
| ) |
gets last strong branching information available for a column variable; returns values of SCIP_INVALID, if strong branching was not yet called on the given column; keep in mind, that the returned old values may have nothing to do with the current LP solution
| col | LP column |
| down | stores dual bound after branching column down, or NULL |
| up | stores dual bound after branching column up, or NULL |
| downvalid | stores whether the returned down value is a valid dual bound, or NULL; otherwise, it can only be used as an estimate value |
| upvalid | stores whether the returned up value is a valid dual bound, or NULL; otherwise, it can only be used as an estimate value |
| solval | stores LP solution value of column at last strong branching call, or NULL |
| lpobjval | stores LP objective value at last strong branching call, or NULL |
Definition at line 4563 of file lp.c.
References NULL, SCIP_Col::sbdown, SCIP_Col::sbdownvalid, SCIP_Col::sblpobjval, SCIP_Col::sbsolval, SCIP_Col::sbup, and SCIP_Col::sbupvalid.
Referenced by SCIPgetVarStrongbranchLast().
| SCIP_Longint SCIPcolGetStrongbranchLPAge | ( | SCIP_COL * | col, |
| SCIP_STAT * | stat | ||
| ) |
if strong branching was already applied on the column at the current node, returns the number of LPs solved after the LP where the strong branching on this column was applied; if strong branching was not yet applied on the column at the current node, returns INT_MAX
| col | LP column |
| stat | dynamic problem statistics |
Definition at line 4595 of file lp.c.
References SCIP_Stat::lpcount, SCIP_Stat::nnodes, SCIP_Stat::nsbdivinglps, NULL, SCIP_Col::sbnode, SCIP_LONGINT_MAX, and SCIP_Col::validsblp.
Referenced by SCIPgetVarStrongbranchLPAge().
marks a column to be not removable from the LP in the current node because it became obsolete
| col | LP column |
| stat | problem statistics |
Definition at line 4607 of file lp.c.
References SCIP_Stat::nnodes, NULL, and SCIP_Col::obsoletenode.
Referenced by SCIPmarkColNotRemovableLocal().
calculates row norms and min/maxidx from scratch, and checks for sorting
| row | LP row |
| set | global SCIP settings |
Definition at line 4627 of file lp.c.
References SCIP_Row::cols, SCIP_Row::cols_index, SCIP_Col::index, SCIP_Row::linkpos, SCIP_Row::lpcolssorted, SCIP_Col::lppos, SCIP_Row::maxidx, SCIP_Row::maxval, SCIP_Row::minidx, SCIP_Row::minval, SCIP_Row::nlpcols, SCIP_Row::nonlpcolssorted, NULL, SCIP_Row::nummaxval, SCIP_Row::numminval, SCIP_Row::objprod, rowAddNorms(), SCIPsetInfinity(), SCIPsetIsZero(), SCIP_Row::sqrnorm, SCIP_Row::sumnorm, TRUE, SCIP_Row::validminmaxidx, and SCIP_Row::vals.
Referenced by rowMerge(), SCIPlpAddRow(), and SCIProwCreate().
calculates min/maxval and min/maxidx from scratch
| row | LP row |
| set | global SCIP settings |
Definition at line 4686 of file lp.c.
References SCIP_Row::cols, SCIP_Col::index, SCIP_Row::len, MAX, SCIP_Row::maxidx, SCIP_Row::maxval, MIN, SCIP_Row::minidx, SCIP_Row::minval, NULL, SCIP_Row::nummaxval, SCIP_Row::numminval, REALABS, SCIP_Real, SCIPsetInfinity(), SCIPsetIsGE(), SCIPsetIsGT(), SCIPsetIsLE(), SCIPsetIsLT(), SCIPsetIsZero(), TRUE, SCIP_Row::validminmaxidx, and SCIP_Row::vals.
Referenced by SCIProwGetMaxidx(), SCIProwGetMaxval(), SCIProwGetMinidx(), and SCIProwGetMinval().
|
static |
checks, whether the given scalar scales the given value to an integral number with error in the given bounds
| val | value that should be scaled to an integral value |
| scalar | scalar that should be tried |
| mindelta | minimal relative allowed difference of scaled coefficient s*c and integral i |
| maxdelta | maximal relative allowed difference of scaled coefficient s*c and integral i |
| intval | pointer to store the scaled integral value, or NULL |
Definition at line 4746 of file lp.c.
References FALSE, NULL, SCIP_Real, SCIPrelDiff(), and TRUE.
Referenced by rowScale(), and SCIProwCalcIntegralScalar().
|
static |
scales row with given factor, and rounds coefficients to integers if close enough; the constant is automatically moved to the sides; if the row's activity is proven to be integral, the sides are automatically rounded to the next integer
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| stat | problem statistics |
| lp | current LP data |
| scaleval | value to scale row with |
| integralcontvars | should the coefficients of the continuous variables also be made integral, if they are close to integral values? |
| minrounddelta | minimal relative difference of scaled coefficient s*c and integral i, upto which the integral is used instead of the scaled real coefficient |
| maxrounddelta | maximal relative difference of scaled coefficient s*c and integral i upto which the integral is used instead of the scaled real coefficient |
Definition at line 4786 of file lp.c.
References colChgCoefPos(), SCIP_Row::cols, SCIP_Row::constant, debugRowPrint, FALSE, SCIP_Row::integral, isIntegralScalar(), SCIP_Col::lb, SCIP_Row::len, SCIP_Row::lhs, SCIP_Row::linkpos, SCIP_Row::local, SCIP_Row::modifiable, SCIP_Row::name, NULL, SCIP_Row::rhs, rowChgCoefPos(), SCIP_Col::rows, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPcolIsIntegral(), SCIProwChgConstant(), SCIProwChgLhs(), SCIProwChgRhs(), SCIPsetDebugMsg, SCIPsetInfinity(), SCIPsetIsEQ(), SCIPsetIsInfinity(), SCIPsetIsIntegral(), SCIPsetIsPositive(), SCIPsetIsZero(), SCIPsetSumCeil(), SCIPsetSumFloor(), SCIPvarGetLbGlobal(), SCIPvarGetUbGlobal(), TRUE, SCIP_Col::ub, SCIP_Row::validactivitylp, SCIP_Col::vals, SCIP_Row::vals, and SCIP_Col::var.
Referenced by SCIProwMakeIntegral().
| SCIP_RETCODE SCIProwCreate | ( | SCIP_ROW ** | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_LP * | lp, | ||
| const char * | name, | ||
| int | len, | ||
| SCIP_COL ** | cols, | ||
| SCIP_Real * | vals, | ||
| SCIP_Real | lhs, | ||
| SCIP_Real | rhs, | ||
| SCIP_ROWORIGINTYPE | origintype, | ||
| void * | origin, | ||
| SCIP_Bool | local, | ||
| SCIP_Bool | modifiable, | ||
| SCIP_Bool | removable | ||
| ) |
creates and captures an LP row
| row | pointer to LP row data |
| blkmem | block memory |
| set | global SCIP settings |
| stat | problem statistics |
| lp | current LP data |
| name | name of row |
| len | number of nonzeros in the row |
| cols | array with columns of row entries |
| vals | array with coefficients of row entries |
| lhs | left hand side of row |
| rhs | right hand side of row |
| origintype | type of origin of row |
| origin | pointer to constraint handler or separator who created the row (NULL if unkown) |
| local | is row only valid locally? |
| modifiable | is row modifiable during node processing (subject to column generation)? |
| removable | should the row be removed from the LP due to aging or cleanup? |
Definition at line 4957 of file lp.c.
References BMSallocBlockMemory, BMSallocBlockMemoryArray, BMSduplicateBlockMemoryArray, FALSE, SCIP_Col::index, SCIP_Stat::nrowidx, NULL, rowCalcNorms(), SCIP_ALLOC, SCIP_BASESTAT_BASIC, SCIP_CALL, SCIP_INVALID, SCIP_OKAY, SCIPeventfilterCreate(), SCIProwCapture(), SCIPsetInfinity(), SCIPsetIsIntegral(), SCIPsetIsZero(), SCIPsetRound(), SCIPstatIncrement, SCIPvarIsIntegral(), TRUE, and SCIP_Col::var.
Referenced by SCIPcreateEmptyRowCons(), SCIPcreateEmptyRowSepa(), SCIPcreateEmptyRowUnspec(), SCIPcreateRowCons(), SCIPcreateRowSepa(), SCIPcreateRowUnspec(), and SCIPreoptApplyCuts().
| SCIP_RETCODE SCIProwFree | ( | SCIP_ROW ** | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_LP * | lp | ||
| ) |
frees an LP row
| row | pointer to LP row |
| blkmem | block memory |
| set | global SCIP settings |
| lp | current LP data |
Definition at line 5097 of file lp.c.
References BMSfreeBlockMemory, BMSfreeBlockMemoryArray, BMSfreeBlockMemoryArrayNull, BMSfreeBlockMemoryNull, NULL, rowUnlink(), SCIP_CALL, SCIP_OKAY, and SCIPeventfilterFree().
Referenced by SCIProwRelease().
| void SCIProwPrint | ( | SCIP_ROW * | row, |
| SCIP_MESSAGEHDLR * | messagehdlr, | ||
| FILE * | file | ||
| ) |
output row to file stream
| row | LP row |
| messagehdlr | message handler |
| file | output file (or NULL for standard output) |
Definition at line 5129 of file lp.c.
References SCIP_Row::cols, SCIP_Row::constant, SCIP_Row::len, SCIP_Row::lhs, SCIP_Row::name, NULL, REALABS, SCIP_Row::rhs, SCIP_DEFAULT_EPSILON, SCIP_VARSTATUS_COLUMN, SCIPmessageFPrintInfo(), SCIPvarGetName(), SCIPvarGetStatus(), SCIP_Row::vals, and SCIP_Col::var.
Referenced by SCIPprintRow().
| void SCIProwCapture | ( | SCIP_ROW * | row | ) |
increases usage counter of LP row
| row | LP row |
Definition at line 5169 of file lp.c.
References SCIP_Row::name, SCIP_Row::nlocks, NULL, SCIP_Row::nuses, and SCIPdebugMessage.
Referenced by cutCreate(), forkCreate(), forkFree(), lpFlushAddRows(), pseudoforkCreate(), SCIPcaptureRow(), SCIPlpAddRow(), SCIProwCreate(), SCIPsepastoreAddCut(), and SCIPsepastoreApplyCuts().
| SCIP_RETCODE SCIProwRelease | ( | SCIP_ROW ** | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_LP * | lp | ||
| ) |
decreases usage counter of LP row, and frees memory if necessary
| row | pointer to LP row |
| blkmem | block memory |
| set | global SCIP settings |
| lp | current LP data |
Definition at line 5182 of file lp.c.
References NULL, SCIP_CALL, SCIP_OKAY, SCIProwFree(), and SCIPsetDebugMsg.
Referenced by cutFree(), forkFree(), lpDelRowset(), lpFlushDelRows(), pseudoforkFree(), SCIPlpFree(), SCIPlpShrinkRows(), SCIPreleaseRow(), SCIPreoptApplyCuts(), SCIPsepastoreAddCut(), SCIPsepastoreApplyCuts(), SCIPsepastoreClearCuts(), sepastoreDelCut(), and subrootFree().
| SCIP_RETCODE SCIProwAddCoef | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_COL * | col, | ||
| SCIP_Real | val | ||
| ) |
adds a previously non existing coefficient to an LP row
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| col | LP column |
| val | value of coefficient |
Definition at line 5239 of file lp.c.
References checkLinks, SCIP_Lp::diving, SCIP_Row::lppos, NULL, rowAddCoef(), SCIP_CALL, and SCIP_OKAY.
| SCIP_RETCODE SCIProwDelCoef | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_COL * | col | ||
| ) |
deletes coefficient from row
| row | row to be changed |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| col | coefficient to be deleted |
Definition at line 5260 of file lp.c.
References checkLinks, colDelCoefPos(), SCIP_Row::cols, SCIP_Row::cols_index, SCIP_Row::delaysort, SCIP_Lp::diving, SCIP_Col::index, SCIP_Row::linkpos, SCIP_Row::lppos, SCIP_Row::name, NULL, rowDelCoefPos(), SCIP_Col::rows, rowSearchCoef(), SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPerrorMessage, SCIPsetIsEQ(), SCIPvarGetName(), SCIP_Col::vals, SCIP_Row::vals, and SCIP_Col::var.
| SCIP_RETCODE SCIProwChgCoef | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_COL * | col, | ||
| SCIP_Real | val | ||
| ) |
changes or adds a coefficient to an LP row
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| col | LP column |
| val | value of coefficient |
Definition at line 5306 of file lp.c.
References checkLinks, colChgCoefPos(), SCIP_Row::cols, SCIP_Row::cols_index, SCIP_Row::delaysort, SCIP_Lp::diving, SCIP_Col::index, SCIP_Row::linkpos, SCIP_Row::lppos, NULL, rowAddCoef(), rowChgCoefPos(), SCIP_Col::rows, rowSearchCoef(), SCIP_CALL, SCIP_OKAY, SCIPsetIsEQ(), SCIP_Col::vals, and SCIP_Row::vals.
| SCIP_RETCODE SCIProwIncCoef | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_COL * | col, | ||
| SCIP_Real | incval | ||
| ) |
increases value of an existing or non-existing coefficient in an LP row
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| col | LP column |
| incval | value to add to the coefficient |
Definition at line 5358 of file lp.c.
References checkLinks, colChgCoefPos(), SCIP_Row::cols, SCIP_Row::cols_index, SCIP_Lp::diving, SCIP_Col::index, SCIP_Row::linkpos, SCIP_Row::lppos, NULL, rowAddCoef(), rowChgCoefPos(), SCIP_Col::rows, rowSearchCoef(), SCIP_CALL, SCIP_OKAY, SCIPsetIsEQ(), SCIPsetIsZero(), SCIP_Row::validactivitylp, SCIP_Col::vals, and SCIP_Row::vals.
Referenced by SCIPvarAddToRow().
| SCIP_RETCODE SCIProwChgConstant | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | constant | ||
| ) |
changes constant value of a row
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| stat | problem statistics |
| eventqueue | event queue |
| lp | current LP data |
| constant | new constant value |
Definition at line 5415 of file lp.c.
References SCIP_Row::constant, SCIP_Lp::diving, SCIP_Stat::domchgcount, SCIP_Row::lhs, SCIP_Row::lppos, SCIP_Row::maxactivity, SCIP_Row::minactivity, NULL, SCIP_Row::pseudoactivity, REALABS, SCIP_Row::rhs, rowEventConstantChanged(), rowSideChanged(), SCIP_CALL, SCIP_INVALID, SCIP_OKAY, SCIP_Real, SCIP_SIDETYPE_LEFT, SCIP_SIDETYPE_RIGHT, SCIPsetIsEQ(), SCIPsetIsInfinity(), SCIP_Row::validactivitybdsdomchg, and SCIP_Row::validpsactivitydomchg.
Referenced by rowScale(), and SCIProwAddConstant().
| SCIP_RETCODE SCIProwAddConstant | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | addval | ||
| ) |
add constant value to a row
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| stat | problem statistics |
| eventqueue | event queue |
| lp | current LP data |
| addval | constant value to add to the row |
Definition at line 5470 of file lp.c.
References SCIP_Row::constant, SCIP_Lp::diving, SCIP_Row::lhs, SCIP_Row::lppos, NULL, REALABS, SCIP_Row::rhs, SCIP_CALL, SCIP_OKAY, SCIProwChgConstant(), SCIPsetIsInfinity(), and SCIPsetIsZero().
Referenced by SCIPvarAddToRow().
| SCIP_RETCODE SCIProwChgLhs | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | lhs | ||
| ) |
changes left hand side of LP row
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| lhs | new left hand side |
Definition at line 5496 of file lp.c.
References SCIP_Lp::diving, SCIP_Row::lhs, NULL, rowEventSideChanged(), rowSideChanged(), SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_SIDETYPE_LEFT, and SCIPsetIsEQ().
Referenced by rowScale(), SCIPchgRowLhs(), SCIPchgRowLhsDive(), and SCIPlpEndDive().
| SCIP_RETCODE SCIProwChgRhs | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | rhs | ||
| ) |
changes right hand side of LP row
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lp | current LP data |
| rhs | new right hand side |
Definition at line 5528 of file lp.c.
References SCIP_Lp::diving, NULL, SCIP_Row::rhs, rowEventSideChanged(), rowSideChanged(), SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_SIDETYPE_RIGHT, and SCIPsetIsEQ().
Referenced by rowScale(), SCIPchgRowRhs(), SCIPchgRowRhsDive(), and SCIPlpEndDive().
| SCIP_RETCODE SCIProwChgLocal | ( | SCIP_ROW * | row, |
| SCIP_Bool | local | ||
| ) |
changes the local flag of LP row
| row | LP row |
| local | new value for local flag |
Definition at line 5560 of file lp.c.
References SCIP_Row::local, NULL, and SCIP_OKAY.
Referenced by SCIPsepastoreAddCut().
| SCIP_RETCODE SCIProwCalcIntegralScalar | ( | SCIP_ROW * | row, |
| SCIP_SET * | set, | ||
| SCIP_Real | mindelta, | ||
| SCIP_Real | maxdelta, | ||
| SCIP_Longint | maxdnom, | ||
| SCIP_Real | maxscale, | ||
| SCIP_Bool | usecontvars, | ||
| SCIP_Real * | intscalar, | ||
| SCIP_Bool * | success | ||
| ) |
tries to find a value, such that all row coefficients, if scaled with this value become integral
| row | LP row |
| set | global SCIP settings |
| mindelta | minimal relative allowed difference of scaled coefficient s*c and integral i |
| maxdelta | maximal relative allowed difference of scaled coefficient s*c and integral i |
| maxdnom | maximal denominator allowed in rational numbers |
| maxscale | maximal allowed scalar |
| usecontvars | should the coefficients of the continuous variables also be made integral? |
| intscalar | pointer to store scalar that would make the coefficients integral, or NULL |
| success | stores whether returned value is valid |
Definition at line 5577 of file lp.c.
References SCIP_Row::cols, SCIP_Row::cols_index, FALSE, isIntegralScalar(), SCIP_Row::len, MIN, nscalars, NULL, REALABS, SCIP_Bool, SCIP_INVALID, SCIP_Longint, SCIP_OKAY, SCIP_Real, SCIP_REAL_MAX, SCIP_VARSTATUS_COLUMN, SCIPcalcGreComDiv(), SCIPcolIsIntegral(), SCIPdebug, SCIPrealToRational(), SCIProwGetName(), SCIPsetDebugMsg, SCIPsetIsInfinity(), SCIPsetIsPositive(), SCIPsetIsZero(), SCIPvarGetCol(), SCIPvarGetStatus(), TRUE, SCIP_Row::vals, and SCIP_Col::var.
Referenced by SCIPcalcRowIntegralScalar(), and SCIProwMakeIntegral().
| SCIP_RETCODE SCIProwMakeIntegral | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_STAT * | stat, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | mindelta, | ||
| SCIP_Real | maxdelta, | ||
| SCIP_Longint | maxdnom, | ||
| SCIP_Real | maxscale, | ||
| SCIP_Bool | usecontvars, | ||
| SCIP_Bool * | success | ||
| ) |
tries to scale row, s.t. all coefficients become integral
| row | LP row |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| stat | problem statistics |
| lp | current LP data |
| mindelta | minimal relative allowed difference of scaled coefficient s*c and integral i |
| maxdelta | maximal relative allowed difference of scaled coefficient s*c and integral i |
| maxdnom | maximal denominator allowed in rational numbers |
| maxscale | maximal value to scale row with |
| usecontvars | should the coefficients of the continuous variables also be made integral? |
| success | stores whether row could be made rational |
Definition at line 5811 of file lp.c.
References NULL, rowScale(), SCIP_CALL, SCIP_OKAY, SCIP_Real, and SCIProwCalcIntegralScalar().
Referenced by SCIPmakeRowIntegral().
sorts row, and merges equal column entries (resulting from lazy sorting and adding) into a single entry; removes zero entries from row the row must not be linked to the columns; otherwise, we would need to update the columns as well, which is too expensive
| row | row to be sorted |
| set | global SCIP settings |
Definition at line 5879 of file lp.c.
References SCIP_Row::cols, SCIP_Row::cols_index, SCIP_Row::delaysort, SCIP_Col::index, SCIP_Row::integral, SCIP_Row::len, SCIP_Row::linkpos, SCIP_Row::lpcolssorted, SCIP_Row::name, SCIP_Row::nlpcols, SCIP_Row::nonlpcolssorted, NULL, SCIP_Row::nunlinked, rowCalcNorms(), SCIP_Real, SCIPcolIsIntegral(), SCIProwSort(), SCIPsetDebugMsg, SCIPsetIsIntegral(), SCIPsetIsZero(), SCIPsetRound(), TRUE, and SCIP_Row::vals.
Referenced by SCIProwForceSort().
| void SCIProwDelaySort | ( | SCIP_ROW * | row | ) |
enables delaying of row sorting
| row | LP row |
Definition at line 5978 of file lp.c.
References SCIP_Row::delaysort, NULL, and TRUE.
Referenced by SCIPaddVarsToRow(), SCIPaddVarsToRowSameCoef(), and SCIPcacheRowExtensions().
disables delaying of row sorting, sorts row and merges coefficients with equal columns
| row | LP row |
| set | global SCIP settings |
Definition at line 5989 of file lp.c.
References SCIP_Row::delaysort, FALSE, NULL, and rowMerge().
Referenced by SCIPaddVarsToRow(), SCIPaddVarsToRowSameCoef(), and SCIPflushRowExtensions().
recalculates the current activity of a row
| row | LP row |
| stat | problem statistics |
Definition at line 6002 of file lp.c.
References SCIP_Row::activity, SCIP_Row::cols, SCIP_Row::constant, SCIP_Row::linkpos, SCIP_Stat::lpcount, SCIP_Col::lppos, SCIP_Row::nlpcols, NULL, SCIP_Row::nunlinked, SCIP_Col::primsol, SCIP_INVALID, SCIP_Row::validactivitylp, and SCIP_Row::vals.
Referenced by SCIPrecalcRowActivity(), SCIPrecalcRowLPActivity(), and SCIProwGetLPActivity().
returns the activity of a row in the current LP solution
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics |
| lp | current LP data |
Definition at line 6054 of file lp.c.
References SCIP_Row::activity, SCIP_Interval::inf, SCIP_Stat::lpcount, MAX, MIN, NULL, SCIP_INVALID, SCIP_Real, SCIProwRecalcLPActivity(), SCIPsetInfinity(), SCIP_Row::validactivitylp, and SCIP_Lp::validsollp.
Referenced by SCIPgetRowActivity(), SCIPgetRowLPActivity(), SCIPgetRowSolActivity(), and SCIProwGetLPFeasibility().
| SCIP_Real SCIProwGetLPFeasibility | ( | SCIP_ROW * | row, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_LP * | lp | ||
| ) |
returns the feasibility of a row in the current LP solution: negative value means infeasibility
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics |
| lp | current LP data |
Definition at line 6084 of file lp.c.
References SCIP_Row::lhs, MIN, NULL, SCIP_Row::rhs, SCIP_Real, and SCIProwGetLPActivity().
Referenced by SCIPcutpoolSeparate(), SCIPgetRowFeasibility(), SCIPgetRowLPFeasibility(), SCIPgetRowSolFeasibility(), SCIProwGetLPEfficacy(), sepastoreApplyBdchg(), and sepastoreApplyCut().
returns the feasibility of a row in the relaxed solution solution: negative value means infeasibility
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics |
Definition at line 6104 of file lp.c.
References SCIP_Row::cols, SCIP_Row::constant, SCIP_Interval::inf, SCIP_Row::lhs, SCIP_Row::linkpos, SCIP_Col::lppos, MAX, MIN, SCIP_Row::nlpcols, NULL, SCIP_Row::nunlinked, SCIP_Row::rhs, SCIP_Real, SCIPsetInfinity(), SCIPvarGetRelaxSol(), SCIP_Row::vals, and SCIP_Col::var.
Referenced by SCIProwGetRelaxEfficacy(), sepastoreApplyBdchg(), and sepastoreApplyCut().
returns the feasibility of a row in the current NLP solution: negative value means infeasibility
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics |
Definition at line 6166 of file lp.c.
References SCIP_Row::cols, SCIP_Row::constant, SCIP_Interval::inf, SCIP_Row::lhs, SCIP_Row::linkpos, SCIP_Col::lppos, MAX, MIN, SCIP_Row::nlpcols, NULL, SCIP_Row::nunlinked, SCIP_Row::rhs, SCIP_Real, SCIPsetInfinity(), SCIPvarGetNLPSol(), SCIP_Row::vals, and SCIP_Col::var.
Referenced by SCIProwGetNLPEfficacy(), sepastoreApplyBdchg(), and sepastoreApplyCut().
calculates the current pseudo activity of a row
| row | row data |
| stat | problem statistics |
Definition at line 6225 of file lp.c.
References SCIP_Row::cols, SCIP_Row::constant, SCIP_Stat::domchgcount, EPSISINT, SCIP_Row::integral, SCIP_Row::len, SCIP_Row::linkpos, SCIP_Col::lppos, NULL, SCIP_Row::pseudoactivity, SCIP_DEFAULT_SUMEPSILON, SCIP_VARSTATUS_COLUMN, SCIPcolGetBestBound(), SCIPvarGetStatus(), SCIP_Row::validpsactivitydomchg, SCIP_Row::vals, and SCIP_Col::var.
Referenced by SCIPrecalcRowActivity(), SCIPrecalcRowPseudoActivity(), and SCIProwGetPseudoActivity().
returns the pseudo activity of a row in the current pseudo solution
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics |
Definition at line 6252 of file lp.c.
References SCIP_Stat::domchgcount, SCIP_Interval::inf, MAX, MIN, NULL, SCIP_Row::pseudoactivity, SCIP_INVALID, SCIP_Real, SCIProwRecalcPseudoActivity(), SCIPsetInfinity(), and SCIP_Row::validpsactivitydomchg.
Referenced by SCIPgetRowActivity(), SCIPgetRowPseudoActivity(), SCIPgetRowSolActivity(), and SCIProwGetPseudoFeasibility().
returns the pseudo feasibility of a row in the current pseudo solution: negative value means infeasibility
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics |
Definition at line 6280 of file lp.c.
References SCIP_Row::lhs, MIN, NULL, SCIP_Row::rhs, SCIP_Real, and SCIProwGetPseudoActivity().
Referenced by SCIPgetRowFeasibility(), SCIPgetRowPseudoFeasibility(), and SCIPgetRowSolFeasibility().
| SCIP_Real SCIProwGetSolActivity | ( | SCIP_ROW * | row, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_SOL * | sol | ||
| ) |
returns the activity of a row for a given solution
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
| sol | primal CIP solution |
Definition at line 6296 of file lp.c.
References SCIP_Row::cols, SCIP_Row::constant, SCIP_Interval::inf, SCIP_Col::lb, SCIP_Row::len, SCIP_Row::lhs, SCIP_Row::linkpos, SCIP_Col::lppos, MAX, MIN, NULL, SCIP_Row::rhs, SCIP_Real, SCIP_UNKNOWN, SCIPsetInfinity(), SCIPsetIsInfinity(), SCIPsolGetVal(), SCIP_Col::ub, SCIP_Row::vals, and SCIP_Col::var.
Referenced by SCIPgetRowSolActivity(), SCIProwGetSolFeasibility(), and SCIPsolAdjustImplicitSolVals().
| SCIP_Real SCIProwGetSolFeasibility | ( | SCIP_ROW * | row, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_SOL * | sol | ||
| ) |
returns the feasibility of a row for the given solution
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
| sol | primal CIP solution |
Definition at line 6338 of file lp.c.
References SCIP_Row::lhs, MIN, NULL, SCIP_Row::rhs, SCIP_Real, and SCIProwGetSolActivity().
Referenced by SCIPcutpoolSeparate(), SCIPgetRowSolFeasibility(), and SCIProwGetSolEfficacy().
calculates minimal and maximal activity of row w.r.t. the column's bounds
| row | row data |
| set | global SCIP settings |
| stat | problem statistics data |
Definition at line 6356 of file lp.c.
References SCIP_Row::cols, SCIP_Row::constant, SCIP_Stat::domchgcount, EPSISINT, FALSE, SCIP_Row::integral, SCIP_Col::lb, SCIP_Row::len, SCIP_Row::linkpos, SCIP_Col::lppos, SCIP_Row::maxactivity, SCIP_Row::minactivity, NULL, REALABS, SCIP_Bool, SCIP_DEFAULT_SUMEPSILON, SCIP_Real, SCIPsetInfinity(), SCIPsetIsInfinity(), SCIP_Col::ub, SCIP_Row::validactivitybdsdomchg, and SCIP_Row::vals.
Referenced by SCIProwGetMaxActivity(), and SCIProwGetMinActivity().
returns the minimal activity of a row w.r.t. the columns' bounds
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
Definition at line 6416 of file lp.c.
References SCIP_Stat::domchgcount, SCIP_Row::maxactivity, SCIP_Row::minactivity, NULL, rowCalcActivityBounds(), SCIP_INVALID, and SCIP_Row::validactivitybdsdomchg.
Referenced by SCIPaddCut(), SCIPgetRowMinActivity(), SCIPlpRemoveRedundantRows(), SCIProwIsRedundant(), sepastoreIsCutRedundant(), and sepastoreIsCutRedundantOrInfeasible().
returns the maximal activity of a row w.r.t. the columns' bounds
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
Definition at line 6437 of file lp.c.
References SCIP_Stat::domchgcount, SCIP_Row::maxactivity, SCIP_Row::minactivity, NULL, rowCalcActivityBounds(), SCIP_INVALID, and SCIP_Row::validactivitybdsdomchg.
Referenced by SCIPaddCut(), SCIPgetRowMaxActivity(), SCIPlpRemoveRedundantRows(), SCIProwIsRedundant(), sepastoreIsCutRedundant(), and sepastoreIsCutRedundantOrInfeasible().
returns whether the row is unmodifiable and redundant w.r.t. the columns' bounds
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
Definition at line 6458 of file lp.c.
References FALSE, SCIP_Row::lhs, SCIP_Row::modifiable, NULL, SCIP_Row::rhs, SCIP_Real, SCIProwGetMaxActivity(), SCIProwGetMinActivity(), SCIPsetIsFeasGT(), SCIPsetIsFeasLT(), SCIPsetIsInfinity(), and TRUE.
Referenced by SCIPlpRemoveRedundantRows().
gets maximal absolute value of row vector coefficients
| row | LP row |
| set | global SCIP settings |
Definition at line 6489 of file lp.c.
References SCIP_Row::len, SCIP_Row::maxval, NULL, SCIP_Row::nummaxval, and rowCalcIdxsAndVals().
Referenced by SCIP_DECL_HASHKEYVAL(), SCIPgetRowMaxCoef(), SCIProwGetLPEfficacy(), SCIProwGetNLPEfficacy(), SCIProwGetRelaxEfficacy(), and SCIProwGetSolEfficacy().
gets minimal absolute value of row vector's non-zero coefficients
| row | LP row |
| set | global SCIP settings |
Definition at line 6505 of file lp.c.
References SCIP_Row::len, SCIP_Row::minval, NULL, SCIP_Row::numminval, and rowCalcIdxsAndVals().
Referenced by SCIP_DECL_HASHKEYVAL(), and SCIPgetRowMinCoef().
gets maximal column index of row entries
| row | LP row |
| set | global SCIP settings |
Definition at line 6521 of file lp.c.
References SCIP_Row::len, SCIP_Row::maxidx, NULL, rowCalcIdxsAndVals(), and SCIP_Row::validminmaxidx.
Referenced by SCIPcutpoolAddNewRow(), and SCIPcutpoolAddRow().
gets minimal column index of row entries
| row | LP row |
| set | global SCIP settings |
Definition at line 6537 of file lp.c.
References SCIP_Row::len, SCIP_Row::minidx, NULL, rowCalcIdxsAndVals(), and SCIP_Row::validminmaxidx.
returns row's efficacy with respect to the current LP solution: e = -feasibility/norm
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
| lp | current LP data |
Definition at line 6553 of file lp.c.
References SCIP_Row::len, MAX, NULL, SCIP_Real, SCIPABORT, SCIPerrorMessage, SCIProwGetLPFeasibility(), SCIProwGetMaxval(), SCIProwGetNorm(), SCIProwGetSumNorm(), and SCIPsetSumepsilon().
Referenced by computeScore(), SCIPgetCutEfficacy(), and SCIProwIsLPEfficacious().
| SCIP_Bool SCIProwIsLPEfficacious | ( | SCIP_ROW * | row, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_LP * | lp, | ||
| SCIP_Bool | root | ||
| ) |
returns whether the row's efficacy with respect to the current LP solution is greater than the minimal cut efficacy
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
| lp | current LP data |
| root | should the root's minimal cut efficacy be used? |
Definition at line 6594 of file lp.c.
References SCIP_Real, SCIProwGetLPEfficacy(), and SCIPsetIsEfficacious().
Referenced by SCIPcutpoolSeparate(), and SCIPisCutEfficacious().
| SCIP_Real SCIProwGetSolEfficacy | ( | SCIP_ROW * | row, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_SOL * | sol | ||
| ) |
returns row's efficacy with respect to the given primal solution: e = -feasibility/norm
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
| sol | primal CIP solution |
Definition at line 6610 of file lp.c.
References SCIP_Row::len, MAX, NULL, SCIP_Real, SCIPABORT, SCIPerrorMessage, SCIProwGetMaxval(), SCIProwGetNorm(), SCIProwGetSolFeasibility(), SCIProwGetSumNorm(), and SCIPsetSumepsilon().
Referenced by SCIPgetCutEfficacy(), and SCIProwIsSolEfficacious().
| SCIP_Bool SCIProwIsSolEfficacious | ( | SCIP_ROW * | row, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_SOL * | sol, | ||
| SCIP_Bool | root | ||
| ) |
returns whether the row's efficacy with respect to the given primal solution is greater than the minimal cut efficacy
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
| sol | primal CIP solution |
| root | should the root's minimal cut efficacy be used? |
Definition at line 6653 of file lp.c.
References SCIP_Real, SCIProwGetSolEfficacy(), and SCIPsetIsEfficacious().
Referenced by SCIPcutpoolSeparate(), and SCIPisCutEfficacious().
returns row's efficacy with respect to the relaxed solution: e = -feasibility/norm
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
Definition at line 6669 of file lp.c.
References SCIP_Row::len, MAX, NULL, SCIP_Real, SCIPABORT, SCIPerrorMessage, SCIProwGetMaxval(), SCIProwGetNorm(), SCIProwGetRelaxFeasibility(), SCIProwGetSumNorm(), and SCIPsetSumepsilon().
Referenced by computeScore().
returns row's efficacy with respect to the NLP solution: e = -feasibility/norm
| row | LP row |
| set | global SCIP settings |
| stat | problem statistics data |
Definition at line 6709 of file lp.c.
References SCIP_Row::len, MAX, NULL, SCIP_Real, SCIPABORT, SCIPerrorMessage, SCIProwGetMaxval(), SCIProwGetNLPFeasibility(), SCIProwGetNorm(), SCIProwGetSumNorm(), and SCIPsetSumepsilon().
Referenced by computeScore().
returns the discrete scalar product of the coefficient vectors of the two given rows
| row1 | first LP row |
| row2 | second LP row |
Definition at line 7110 of file lp.c.
References SCIP_Row::cols, SCIP_Row::cols_index, FALSE, SCIP_Col::index, SCIP_Row::len, SCIP_Row::lpcolssorted, SCIP_Col::lppos, MAX, SCIP_Row::nlpcols, SCIP_Row::nonlpcolssorted, NULL, SCIP_Row::nunlinked, SCIP_Bool, SCIProwSort(), SCIPswapPointers(), and TRUE.
Referenced by SCIProwGetParallelism().
gets parallelism of row with objective function: if the returned value is 1, the row is parallel to the objective function, if the value is 0, it is orthogonal to the objective function
| row | LP row |
| set | global SCIP settings |
| lp | current LP data |
Definition at line 7545 of file lp.c.
References checkRowObjprod, checkRowSqrnorm, MAX, MIN, NULL, SCIP_Row::objprod, SCIP_Lp::objsqrnorm, SCIP_Lp::objsqrnormunreliable, REALABS, SCIP_Real, SCIPlpRecalculateObjSqrNorm(), SCIPsetIsPositive(), SCIPsetIsSumGE(), SCIPsetIsSumLE(), and SCIP_Row::sqrnorm.
Referenced by SCIPsepastoreAddCut().
| SCIP_RETCODE SCIProwCatchEvent | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTTYPE | eventtype, | ||
| SCIP_EVENTHDLR * | eventhdlr, | ||
| SCIP_EVENTDATA * | eventdata, | ||
| int * | filterpos | ||
| ) |
includes event handler with given data in row's event filter
| row | row |
| blkmem | block memory |
| set | global SCIP settings |
| eventtype | event type to catch |
| eventhdlr | event handler to call for the event processing |
| eventdata | event data to pass to the event handler for the event processing |
| filterpos | pointer to store position of event filter entry, or NULL |
Definition at line 7578 of file lp.c.
References SCIP_Row::eventfilter, SCIP_Row::name, NULL, SCIP_CALL, SCIP_EVENTTYPE_FORMAT, SCIP_EVENTTYPE_ROWCHANGED, SCIP_OKAY, SCIPeventfilterAdd(), and SCIPsetDebugMsg.
Referenced by SCIPcatchRowEvent().
| SCIP_RETCODE SCIProwDropEvent | ( | SCIP_ROW * | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTTYPE | eventtype, | ||
| SCIP_EVENTHDLR * | eventhdlr, | ||
| SCIP_EVENTDATA * | eventdata, | ||
| int | filterpos | ||
| ) |
deletes event handler with given data from row's event filter
| row | row |
| blkmem | block memory |
| set | global SCIP settings |
| eventtype | event type mask of dropped event |
| eventhdlr | event handler to call for the event processing |
| eventdata | event data to pass to the event handler for the event processing |
| filterpos | position of event filter entry returned by SCIPvarCatchEvent(), or -1 |
Definition at line 7602 of file lp.c.
References SCIP_Row::eventfilter, SCIP_Row::name, NULL, SCIP_CALL, SCIP_OKAY, SCIPeventfilterDel(), and SCIPsetDebugMsg.
Referenced by SCIPdropRowEvent().
marks a row to be not removable from the LP in the current node because it became obsolete
| row | LP row |
| stat | problem statistics |
Definition at line 7623 of file lp.c.
References SCIP_Stat::nnodes, NULL, and SCIP_Row::obsoletenode.
Referenced by SCIPmarkRowNotRemovableLocal().
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resets column data to represent a column not in the LP solver
| col | column to be marked deleted |
Definition at line 7642 of file lp.c.
References SCIP_Col::basisstatus, FALSE, SCIP_Col::farkascoef, SCIP_Col::lpipos, NULL, SCIP_Col::primsol, SCIP_Col::redcost, SCIP_Col::sbdown, SCIP_Col::sbdownvalid, SCIP_Col::sbitlim, SCIP_Col::sbup, SCIP_Col::sbupvalid, SCIP_BASESTAT_ZERO, SCIP_INVALID, SCIP_Col::validfarkaslp, and SCIP_Col::validredcostlp.
Referenced by lpDelColset(), and lpFlushDelCols().
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applies all cached column removals to the LP solver
| lp | current LP data |
Definition at line 7664 of file lp.c.
References SCIP_Col::coefchanged, SCIP_Lp::cols, SCIP_Lp::diving, FALSE, SCIP_Lp::flushdeletedcols, SCIP_Lp::lpi, SCIP_Lp::lpicols, SCIP_Lp::lpifirstchgcol, SCIP_Col::lpipos, SCIP_Lp::lpobjval, SCIP_Lp::lpsolstat, markColDeleted(), SCIP_Lp::ncols, SCIP_Lp::nlpicols, NULL, SCIP_Lp::primalchecked, SCIP_Lp::primalfeasible, SCIP_CALL, SCIP_INVALID, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_OKAY, SCIPdebugMessage, SCIPlpiDelCols(), SCIP_Lp::solved, TRUE, and SCIP_Lp::updateintegrality.
Referenced by SCIPlpFlush().
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computes for the given column the lower and upper bound that should be flushed into the LP depending on lazy bounds and diving mode; in diving mode, lazy bounds are ignored, i.e., the bounds are explicitly added to the LP in any case
| lp | current LP data |
| set | global SCIP settings |
| col | column to compute bounds for |
| lpiinf | infinity value if the LP solver |
| lb | pointer to store the new lower bound |
| ub | pointer to store the new upper bound |
Definition at line 7715 of file lp.c.
References SCIP_Col::lazylb, SCIP_Col::lazyub, SCIP_Col::lb, NULL, SCIPlpDiving(), SCIPsetIsGE(), SCIPsetIsInfinity(), SCIPsetIsLE(), and SCIP_Col::ub.
Referenced by lpFlushAddCols(), and lpFlushChgCols().
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applies all cached column additions to the LP solver
| lp | current LP data |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
Definition at line 7750 of file lp.c.
References SCIP_Col::coefchanged, colLink(), SCIP_Lp::cols, computeLPBounds(), debugColPrint, SCIP_Lp::diving, SCIP_Lp::dualchecked, SCIP_Lp::dualfeasible, ensureLpicolsSize(), FALSE, SCIP_Col::farkascoef, SCIP_Lp::flushaddedcols, SCIP_Col::flushedlb, SCIP_Col::flushedobj, SCIP_Col::flushedub, SCIP_Col::lbchanged, SCIP_Col::len, SCIP_Lp::lpi, SCIP_Lp::lpicols, SCIP_Lp::lpifirstchgcol, SCIP_Col::lpipos, SCIP_Row::lpipos, SCIP_Lp::lpobjval, SCIP_Col::lppos, SCIP_Lp::lpsolstat, SCIP_Lp::ncols, SCIP_Lp::nlpicols, SCIP_Col::nlprows, NULL, SCIP_Col::obj, SCIP_Col::objchanged, SCIP_Col::primsol, SCIP_Col::redcost, SCIP_Col::rows, SCIP_Col::sbdown, SCIP_Col::sbdownvalid, SCIP_Col::sbitlim, SCIP_Col::sbup, SCIP_Col::sbupvalid, SCIP_CALL, SCIP_INVALID, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPlpiAddCols(), SCIPlpiInfinity(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPvarGetCol(), SCIPvarGetName(), SCIPvarGetStatus(), SCIP_Lp::solved, TRUE, SCIP_Col::ubchanged, SCIP_Lp::updateintegrality, SCIP_Col::validfarkaslp, SCIP_Col::validredcostlp, SCIP_Col::vals, and SCIP_Col::var.
Referenced by SCIPlpFlush().
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static |
resets row data to represent a row not in the LP solver
| row | row to be marked deleted |
Definition at line 7908 of file lp.c.
References SCIP_Row::activity, SCIP_Row::basisstatus, SCIP_Row::dualfarkas, SCIP_Row::dualsol, SCIP_Row::lpipos, NULL, SCIP_BASESTAT_BASIC, SCIP_INVALID, and SCIP_Row::validactivitylp.
Referenced by lpDelRowset(), and lpFlushDelRows().
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applies all cached row removals to the LP solver
| lp | current LP data |
| blkmem | block memory |
| set | global SCIP settings |
Definition at line 7924 of file lp.c.
References SCIP_Row::coefchanged, SCIP_Lp::dualchecked, SCIP_Lp::dualfeasible, FALSE, SCIP_Lp::flushdeletedrows, SCIP_Lp::lpi, SCIP_Lp::lpifirstchgrow, SCIP_Row::lpipos, SCIP_Lp::lpirows, SCIP_Lp::lpobjval, SCIP_Lp::lpsolstat, markRowDeleted(), SCIP_Lp::nlpirows, SCIP_Lp::nrows, NULL, SCIP_Lp::rows, SCIP_CALL, SCIP_INVALID, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_OKAY, SCIPlpiDelRows(), SCIProwRelease(), SCIPsetDebugMsg, SCIP_Lp::solved, and TRUE.
Referenced by SCIPlpFlush().
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applies all cached row additions and removals to the LP solver
| lp | current LP data |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
Definition at line 7973 of file lp.c.
References SCIP_Row::activity, SCIP_Row::coefchanged, SCIP_Row::cols, SCIP_Row::constant, debugRowPrint, SCIP_Row::dualfarkas, SCIP_Row::dualsol, ensureLpirowsSize(), FALSE, SCIP_Lp::flushaddedrows, SCIP_Row::flushedlhs, SCIP_Row::flushedrhs, SCIP_Row::len, SCIP_Row::lhs, SCIP_Row::lhschanged, SCIP_Lp::lpi, SCIP_Lp::lpifirstchgrow, SCIP_Col::lpipos, SCIP_Row::lpipos, SCIP_Lp::lpirows, SCIP_Lp::lpobjval, SCIP_Row::lppos, SCIP_Lp::lpsolstat, SCIP_Row::name, SCIP_Row::nlpcols, SCIP_Lp::nlpirows, SCIP_Lp::nrows, NULL, SCIP_Lp::primalchecked, SCIP_Lp::primalfeasible, SCIP_Row::rhs, SCIP_Row::rhschanged, rowLink(), SCIP_Lp::rows, SCIP_CALL, SCIP_INVALID, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_OKAY, SCIP_Real, SCIPlpiAddRows(), SCIPlpiInfinity(), SCIProwCapture(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetDebugMsgPrint, SCIPsetFreeBufferArray, SCIPsetIsInfinity(), SCIPvarGetName(), SCIP_Lp::solved, TRUE, SCIP_Row::validactivitylp, SCIP_Row::vals, and SCIP_Col::var.
Referenced by SCIPlpFlush().
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applies all cached column bound and objective changes to the LP
| lp | current LP data |
| set | global SCIP settings |
Definition at line 8121 of file lp.c.
References SCIP_Lp::chgcols, computeLPBounds(), SCIP_Lp::dualchecked, SCIP_Lp::dualfeasible, FALSE, SCIP_Col::flushedlb, SCIP_Col::flushedobj, SCIP_Col::flushedub, SCIP_Col::lbchanged, SCIP_Lp::lpi, SCIP_Col::lpipos, SCIP_Lp::lpobjval, SCIP_Lp::lpsolstat, SCIP_Lp::nchgcols, SCIP_Lp::ncols, NULL, SCIP_Col::obj, SCIP_Col::objchanged, SCIP_Lp::primalchecked, SCIP_Lp::primalfeasible, SCIP_Bool, SCIP_CALL, SCIP_INVALID, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPlpiChgBounds(), SCIPlpiChgObj(), SCIPlpiGetBounds(), SCIPlpiGetObj(), SCIPlpiGetSolverName(), SCIPlpiInfinity(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPsetIsFeasEQ(), SCIPsetIsInfinity(), SCIPvarGetCol(), SCIPvarGetStatus(), SCIP_Lp::solved, SCIP_Col::ubchanged, and SCIP_Col::var.
Referenced by SCIPlpFlush().
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applies all cached row side changes to the LP
| lp | current LP data |
| set | global SCIP settings |
Definition at line 8269 of file lp.c.
References SCIP_Lp::chgrows, SCIP_Row::constant, FALSE, SCIP_Row::flushedlhs, SCIP_Row::flushedrhs, SCIP_Row::lhs, SCIP_Row::lhschanged, SCIP_Lp::lpi, SCIP_Row::lpipos, SCIP_Lp::lpobjval, SCIP_Lp::lpsolstat, SCIP_Lp::nchgrows, SCIP_Lp::nrows, NULL, SCIP_Lp::primalchecked, SCIP_Lp::primalfeasible, SCIP_Row::rhs, SCIP_Row::rhschanged, SCIP_Bool, SCIP_CALL, SCIP_INVALID, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_OKAY, SCIP_Real, SCIPlpiChgSides(), SCIPlpiGetSides(), SCIPlpiGetSolverName(), SCIPlpiInfinity(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPsetIsInfinity(), SCIPsetIsSumEQ(), and SCIP_Lp::solved.
Referenced by SCIPlpFlush().
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copy integrality information to the LP
| lp | current LP data |
| set | global SCIP settings |
Definition at line 8368 of file lp.c.
References SCIP_Lp::cols, FALSE, SCIP_Lp::lpi, SCIP_Lp::ncols, NULL, SCIP_CALL, SCIP_OKAY, SCIPcolGetVar(), SCIPlpiSetIntegralityInformation(), SCIPsetAllocBufferArray, SCIPsetFreeBufferArray, SCIPvarIsBinary(), SCIPvarIsIntegral(), and SCIP_Lp::updateintegrality.
Referenced by lpSolveStable().
| SCIP_RETCODE SCIPlpFlush | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue | ||
| ) |
applies all cached changes to the LP solver
| lp | current LP data |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
Definition at line 8416 of file lp.c.
References checkLinks, FALSE, SCIP_Lp::flushaddedcols, SCIP_Lp::flushaddedrows, SCIP_Lp::flushdeletedcols, SCIP_Lp::flushdeletedrows, SCIP_Lp::flushed, lpFlushAddCols(), lpFlushAddRows(), lpFlushChgCols(), lpFlushChgRows(), lpFlushDelCols(), lpFlushDelRows(), SCIP_Lp::lpi, SCIP_Lp::lpifirstchgcol, SCIP_Lp::lpifirstchgrow, SCIP_Lp::nchgcols, SCIP_Lp::nchgrows, SCIP_Lp::ncols, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, SCIP_Lp::nrows, NULL, SCIP_CALL, SCIP_OKAY, SCIPlpiGetNCols(), SCIPlpiGetNRows(), SCIPsetDebugMsg, and TRUE.
Referenced by focusnodeCleanupVars(), lpFlushAndSolve(), priceAndCutLoop(), SCIPflushLP(), SCIPlpEndDive(), SCIPlpReset(), SCIPlpSetState(), SCIPlpSolveAndEval(), SCIPtreeEndProbing(), SCIPwriteLP(), and SCIPwriteMIP().
| SCIP_RETCODE SCIPlpMarkFlushed | ( | SCIP_LP * | lp, |
| SCIP_SET * | set | ||
| ) |
marks the LP to be flushed, even if the LP thinks it is not flushed
| lp | current LP data |
| set | global SCIP settings |
Definition at line 8470 of file lp.c.
References checkLinks, SCIP_Lp::chgcols, SCIP_Lp::chgrows, SCIP_Col::coefchanged, SCIP_Row::coefchanged, SCIP_Lp::cols, SCIP_Row::constant, FALSE, SCIP_Lp::flushed, SCIP_Col::flushedlb, SCIP_Row::flushedlhs, SCIP_Col::flushedobj, SCIP_Row::flushedrhs, SCIP_Col::flushedub, SCIP_Col::lb, SCIP_Col::lbchanged, SCIP_Row::lhs, SCIP_Row::lhschanged, SCIP_Lp::lpi, SCIP_Lp::lpicols, SCIP_Lp::lpifirstchgcol, SCIP_Lp::lpifirstchgrow, SCIP_Col::lpipos, SCIP_Row::lpipos, SCIP_Lp::lpirows, SCIP_Lp::nchgcols, SCIP_Lp::nchgrows, SCIP_Lp::ncols, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, SCIP_Lp::nrows, NULL, SCIP_Col::obj, SCIP_Col::objchanged, SCIP_Row::rhs, SCIP_Row::rhschanged, SCIP_Lp::rows, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPlpiGetBounds(), SCIPlpiGetObj(), SCIPlpiGetSides(), SCIPlpiGetSolverName(), SCIPlpiInfinity(), SCIPsetIsInfinity(), SCIPsetIsSumEQ(), SCIPvarGetCol(), SCIPvarGetStatus(), TRUE, SCIP_Col::ub, SCIP_Col::ubchanged, and SCIP_Col::var.
updates link data after addition of column
| col | LP column |
| set | global SCIP settings |
Definition at line 8598 of file lp.c.
References SCIP_Row::cols, FALSE, SCIP_Col::len, SCIP_Col::linkpos, SCIP_Row::linkpos, SCIP_Row::lpcolssorted, SCIP_Col::lppos, SCIP_Row::nlpcols, NULL, rowAddNorms(), SCIP_Col::rows, rowSwapCoefs(), and SCIP_Row::vals.
Referenced by SCIPlpAddCol().
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updates link data after addition of row
| row | LP row |
Definition at line 8638 of file lp.c.
References SCIP_Row::cols, colSwapCoefs(), FALSE, SCIP_Row::len, SCIP_Col::linkpos, SCIP_Row::linkpos, SCIP_Row::lppos, SCIP_Col::lprowssorted, SCIP_Col::nlprows, NULL, and SCIP_Col::rows.
Referenced by SCIPlpAddRow().
updates link data after removal of column
| col | LP column |
| set | global SCIP settings |
Definition at line 8673 of file lp.c.
References SCIP_Row::cols, FALSE, SCIP_Col::len, SCIP_Col::linkpos, SCIP_Row::linkpos, SCIP_Col::lppos, SCIP_Row::nlpcols, SCIP_Row::nonlpcolssorted, NULL, rowDelNorms(), SCIP_Col::rows, rowSwapCoefs(), TRUE, and SCIP_Row::vals.
Referenced by lpDelColset(), and SCIPlpShrinkCols().
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updates link data after removal of row
| row | LP row |
Definition at line 8712 of file lp.c.
References SCIP_Row::cols, colSwapCoefs(), FALSE, SCIP_Row::len, SCIP_Col::linkpos, SCIP_Row::linkpos, SCIP_Row::lppos, SCIP_Col::nlprows, SCIP_Col::nonlprowssorted, NULL, and SCIP_Col::rows.
Referenced by lpDelRowset(), and SCIPlpShrinkRows().
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| lp | LP data object |
| initsize | initial size of the arrays |
Definition at line 8746 of file lp.c.
References BMSallocMemoryArray, SCIP_Lp::divechgrows, SCIP_Lp::divechgsides, SCIP_Lp::divechgsidessize, SCIP_Lp::divechgsidetypes, SCIP_Lp::ndivechgsides, NULL, SCIP_ALLOC, and SCIP_OKAY.
Referenced by SCIPlpCreate().
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| lp | LP data object |
| minsize | minimal number of elements |
| growfact | growing factor |
Definition at line 8768 of file lp.c.
References BMSreallocMemoryArray, SCIP_Lp::divechgrows, SCIP_Lp::divechgsides, SCIP_Lp::divechgsidessize, SCIP_Lp::divechgsidetypes, MAX, SCIP_Lp::ndivechgsides, NULL, SCIP_ALLOC, and SCIP_OKAY.
Referenced by SCIPlpRecordOldRowSideDive().
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| lp | LP data object |
Definition at line 8794 of file lp.c.
References BMSfreeMemoryArrayNull, SCIP_Lp::divechgrows, SCIP_Lp::divechgsides, SCIP_Lp::divechgsidessize, SCIP_Lp::divechgsidetypes, SCIP_Lp::ndivechgsides, and NULL.
Referenced by SCIPlpFree().
| SCIP_RETCODE SCIPlpCreate | ( | SCIP_LP ** | lp, |
| SCIP_SET * | set, | ||
| SCIP_MESSAGEHDLR * | messagehdlr, | ||
| SCIP_STAT * | stat, | ||
| const char * | name | ||
| ) |
creates empty LP data object
| lp | pointer to LP data object |
| set | global SCIP settings |
| messagehdlr | message handler |
| stat | problem statistics |
| name | problem name |
Definition at line 8814 of file lp.c.
References allocDiveChgSideArrays(), BMSallocMemory, DIVESTACKINITSIZE, FALSE, SCIP_Stat::lpcount, lpSetBoolpar(), lpSetIntpar(), lpSetRealpar(), NULL, SCIP_ALLOC, SCIP_Bool, SCIP_CALL, SCIP_INVALID, SCIP_LPALGO_DUALSIMPLEX, SCIP_LPPAR_BARRIERCONVTOL, SCIP_LPPAR_CONDITIONLIMIT, SCIP_LPPAR_DUALFEASTOL, SCIP_LPPAR_FASTMIP, SCIP_LPPAR_FEASTOL, SCIP_LPPAR_FROMSCRATCH, SCIP_LPPAR_LPINFO, SCIP_LPPAR_LPITLIM, SCIP_LPPAR_POLISHING, SCIP_LPPAR_PRESOLVING, SCIP_LPPAR_PRICING, SCIP_LPPAR_RANDOMSEED, SCIP_LPPAR_ROWREPSWITCH, SCIP_LPPAR_SCALING, SCIP_LPPAR_THREADS, SCIP_LPPAR_TIMING, SCIP_LPPAR_UOBJLIM, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OBJSEN_MINIMIZE, SCIP_OKAY, SCIP_PRICING_AUTO, SCIP_VERBLEVEL_FULL, SCIPlpiCreate(), SCIPlpiGetSolverName(), SCIPlpiInfinity(), SCIPmessagePrintVerbInfo(), SCIPsetBarrierconvtol(), SCIPsetDualfeastol(), SCIPsetInfinity(), SCIPsetLpfeastol(), and TRUE.
Referenced by SCIPtransformProb().
| SCIP_RETCODE SCIPlpFree | ( | SCIP_LP ** | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter | ||
| ) |
frees LP data object
| lp | pointer to LP data object |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| eventfilter | global event filter |
Definition at line 9073 of file lp.c.
References BMSfreeMemory, BMSfreeMemoryArrayNull, BMSfreeMemoryNull, freeDiveChgSideArrays(), NULL, SCIP_CALL, SCIP_OKAY, SCIPlpClear(), SCIPlpiFree(), and SCIProwRelease().
Referenced by freeTransform().
| SCIP_RETCODE SCIPlpReset | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter | ||
| ) |
resets the LP to the empty LP by removing all columns and rows from LP, releasing all rows, and flushing the changes to the LP solver
| lp | LP data |
| blkmem | block memory |
| set | global SCIP settings |
| stat | problem statistics |
| eventqueue | event queue |
| eventfilter | global event filter |
Definition at line 9117 of file lp.c.
References SCIP_Lp::dualchecked, SCIP_Lp::dualfeasible, FALSE, SCIP_Lp::lastlpalgo, SCIP_Stat::lpcount, SCIP_Lp::lpobjval, SCIP_Lp::lpsolstat, NULL, SCIP_Lp::primalchecked, SCIP_Lp::primalfeasible, SCIP_CALL, SCIP_LPALGO_DUALSIMPLEX, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIPlpClear(), SCIPlpFlush(), SCIP_Lp::solisbasic, SCIP_Lp::solved, TRUE, SCIP_Lp::validfarkaslp, and SCIP_Lp::validsollp.
Referenced by freeReoptSolve(), freeSolve(), and initSolve().
| SCIP_RETCODE SCIPlpAddCol | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_COL * | col, | ||
| int | depth | ||
| ) |
adds a column to the LP
| lp | LP data |
| set | global SCIP settings |
| col | LP column |
| depth | depth in the tree where the column addition is performed |
Definition at line 9148 of file lp.c.
References SCIP_Col::age, checkLinks, SCIP_Lp::cols, colUpdateAddLP(), SCIP_Lp::diving, ensureColsSize(), ensureLazycolsSize(), FALSE, SCIP_Lp::flushed, SCIP_Col::integral, SCIP_Lp::lazycols, SCIP_Col::lazylb, SCIP_Col::lazyub, SCIP_Col::lb, SCIP_Col::len, SCIP_Col::lpdepth, SCIP_Col::lppos, lpUpdateObjNorms(), SCIP_Row::name, SCIP_Lp::ncols, SCIP_Lp::nlazycols, SCIP_Lp::nremovablecols, SCIP_Lp::nrows, NULL, SCIP_Col::obj, SCIP_Col::removable, SCIP_Col::rows, SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIPsetDebugMsg, SCIPsetDebugMsgPrint, SCIPsetIsInfinity(), SCIPvarGetCol(), SCIPvarGetName(), SCIPvarGetStatus(), SCIPvarIsIntegral(), SCIP_Col::ub, SCIP_Col::unchangedobj, SCIP_Col::vals, and SCIP_Col::var.
Referenced by forkAddLP(), pseudoforkAddLP(), SCIPpricestoreApplyVars(), and subrootConstructLP().
| SCIP_RETCODE SCIPlpAddRow | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter, | ||
| SCIP_ROW * | row, | ||
| int | depth | ||
| ) |
adds a row to the LP and captures it
| lp | LP data |
| blkmem | block memory buffers |
| set | global SCIP settings |
| eventqueue | event queue |
| eventfilter | global event filter |
| row | LP row |
| depth | depth in the tree where the row addition is performed |
Definition at line 9207 of file lp.c.
References SCIP_Row::age, checkLinks, SCIP_Row::cols, SCIP_Row::constant, ensureRowsSize(), SCIP_EventFilter::eventmask, FALSE, SCIP_Lp::flushed, SCIP_EventFilter::len, SCIP_Row::len, SCIP_Row::lhs, SCIP_Row::lpdepth, SCIP_Row::lppos, SCIP_Row::name, SCIP_Lp::ncols, SCIP_Lp::nremovablerows, SCIP_Lp::nrows, NULL, SCIP_Row::removable, SCIP_Row::rhs, rowCalcNorms(), SCIP_Lp::rows, rowUpdateAddLP(), SCIP_CALL, SCIP_EVENTTYPE_ROWADDEDLP, SCIP_OKAY, SCIPeventCreateRowAddedLP(), SCIPeventqueueAdd(), SCIProwCapture(), SCIProwLock(), SCIPsetDebugMsg, SCIPsetDebugMsgPrint, SCIPsetIsZero(), SCIPvarGetName(), SCIP_Row::vals, and SCIP_Col::var.
Referenced by forkAddLP(), pseudoforkAddLP(), SCIPaddRowDive(), SCIPaddRowProbing(), sepastoreApplyCut(), and subrootConstructLP().
method checks if all columns in the lazycols array have at least one lazy bound and also have a counter part in the cols array; furthermore, it is checked if columns in the cols array which have a lazy bound have a counter part in the lazycols array
| lp | LP data |
| set | global SCIP settings |
Definition at line 9278 of file lp.c.
References SCIP_Lp::cols, FALSE, SCIP_Lp::lazycols, SCIP_Col::lazylb, SCIP_Col::lazyub, SCIP_Lp::ncols, SCIP_Lp::nlazycols, NULL, SCIP_Bool, SCIPsetIsInfinity(), and TRUE.
Referenced by lpDelColset(), and SCIPlpShrinkCols().
| SCIP_RETCODE SCIPlpShrinkCols | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| int | newncols | ||
| ) |
removes all columns after the given number of cols from the LP
| lp | LP data |
| set | global SCIP settings |
| newncols | new number of columns in the LP |
Definition at line 9331 of file lp.c.
References checkLazyColArray(), checkLinks, SCIP_Lp::cols, colUpdateDelLP(), SCIP_Lp::diving, FALSE, SCIP_Lp::flushed, SCIP_Lp::lazycols, SCIP_Col::len, SCIP_Col::lpdepth, SCIP_Lp::lpifirstchgcol, SCIP_Col::lppos, lpUpdateObjNorms(), MIN, SCIP_Lp::ncols, SCIP_Lp::nlazycols, SCIP_Lp::nremovablecols, NULL, SCIP_Col::removable, SCIP_Col::rows, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIPsetDebugMsg, SCIPvarGetCol(), SCIPvarGetStatus(), SCIP_Col::unchangedobj, and SCIP_Col::var.
Referenced by focusnodeCleanupVars(), focusnodeToFork(), SCIPlpClear(), SCIPtreeLoadLP(), and treeBacktrackProbing().
| SCIP_RETCODE SCIPlpShrinkRows | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter, | ||
| int | newnrows | ||
| ) |
removes and releases all rows after the given number of rows from the LP
| lp | LP data |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| eventfilter | global event filter |
| newnrows | new number of rows in the LP |
Definition at line 9403 of file lp.c.
References checkLinks, SCIP_Row::cols, SCIP_EventFilter::eventmask, FALSE, SCIP_Lp::flushed, SCIP_EventFilter::len, SCIP_Row::len, SCIP_Row::lpdepth, SCIP_Lp::lpifirstchgrow, SCIP_Row::lppos, MIN, SCIP_Lp::nremovablerows, SCIP_Lp::nrows, NULL, SCIP_Row::removable, SCIP_Lp::rows, rowUpdateDelLP(), SCIP_CALL, SCIP_EVENTTYPE_ROWDELETEDLP, SCIP_OKAY, SCIPeventCreateRowDeletedLP(), SCIPeventqueueAdd(), SCIProwRelease(), SCIProwUnlock(), and SCIPsetDebugMsg.
Referenced by focusnodeToFork(), SCIPlpClear(), SCIPlpEndDive(), SCIPtreeLoadLP(), and treeBacktrackProbing().
| SCIP_RETCODE SCIPlpClear | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter | ||
| ) |
removes all columns and rows from LP, releases all rows
| lp | LP data |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| eventfilter | global event filter |
Definition at line 9469 of file lp.c.
References SCIP_Lp::diving, NULL, SCIP_CALL, SCIP_OKAY, SCIPlpShrinkCols(), SCIPlpShrinkRows(), and SCIPsetDebugMsg.
Referenced by SCIPlpFree(), SCIPlpReset(), and SCIPtreeLoadLP().
| void SCIPlpMarkSize | ( | SCIP_LP * | lp | ) |
remembers number of columns and rows to track the newly added ones
| lp | current LP data |
Definition at line 9488 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::firstnewcol, SCIP_Lp::firstnewrow, SCIP_Lp::ncols, SCIP_Lp::nrows, and NULL.
Referenced by SCIPnodeFocus(), SCIPtreeLoadLP(), and treeCreateProbingNode().
| void SCIPlpSetSizeMark | ( | SCIP_LP * | lp, |
| int | nrows, | ||
| int | ncols | ||
| ) |
sets the remembered number of columns and rows to the given values
| lp | current LP data |
| nrows | number of rows to set the size marker to |
| ncols | number of columns to set the size marker to |
Definition at line 9500 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::firstnewcol, SCIP_Lp::firstnewrow, and NULL.
Referenced by treeBacktrackProbing().
| SCIP_RETCODE SCIPlpGetBasisInd | ( | SCIP_LP * | lp, |
| int * | basisind | ||
| ) |
gets all indices of basic columns and rows: index i >= 0 corresponds to column i, index i < 0 to row -i-1
| lp | LP data |
| basisind | pointer to store basis indices ready to keep number of rows entries |
Definition at line 9514 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, SCIPlpiGetBasisInd(), SCIP_Lp::solisbasic, and SCIP_Lp::solved.
Referenced by SCIPgetLPBasisInd().
| SCIP_RETCODE SCIPlpGetBase | ( | SCIP_LP * | lp, |
| int * | cstat, | ||
| int * | rstat | ||
| ) |
gets current basis status for columns and rows; arrays must be large enough to store the basis status
| lp | LP data |
| cstat | array to store column basis status, or NULL |
| rstat | array to store row basis status, or NULL |
Definition at line 9531 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, SCIPlpiGetBase(), SCIP_Lp::solisbasic, and SCIP_Lp::solved.
| SCIP_RETCODE SCIPlpGetBInvRow | ( | SCIP_LP * | lp, |
| int | r, | ||
| SCIP_Real * | coef, | ||
| int * | inds, | ||
| int * | ninds | ||
| ) |
gets a row from the inverse basis matrix B^-1
| lp | LP data |
| r | row number |
| coef | pointer to store the coefficients of the row |
| inds | array to store the non-zero indices, or NULL |
| ninds | pointer to store the number of non-zero indices, or NULL (-1: if we do not store sparsity informations) |
Definition at line 9548 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, SCIPlpiGetBInvRow(), SCIP_Lp::solisbasic, and SCIP_Lp::solved.
Referenced by SCIPgetLPBInvRow().
| SCIP_RETCODE SCIPlpGetBInvCol | ( | SCIP_LP * | lp, |
| int | c, | ||
| SCIP_Real * | coef, | ||
| int * | inds, | ||
| int * | ninds | ||
| ) |
gets a column from the inverse basis matrix B^-1
| lp | LP data |
| c | column number of B^-1; this is NOT the number of the column in the LP returned by SCIPcolGetLPPos(); you have to call SCIPgetBasisInd() to get the array which links the B^-1 column numbers to the row and column numbers of the LP! c must be between 0 and nrows-1, since the basis has the size nrows * nrows |
| coef | pointer to store the coefficients of the column |
| inds | array to store the non-zero indices, or NULL |
| ninds | pointer to store the number of non-zero indices, or NULL (-1: if we do not store sparsity informations) |
Definition at line 9570 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, SCIPlpiGetBInvCol(), SCIP_Lp::solisbasic, and SCIP_Lp::solved.
Referenced by SCIPgetLPBInvCol().
| SCIP_RETCODE SCIPlpGetBInvARow | ( | SCIP_LP * | lp, |
| int | r, | ||
| SCIP_Real * | binvrow, | ||
| SCIP_Real * | coef, | ||
| int * | inds, | ||
| int * | ninds | ||
| ) |
gets a row from the product of inverse basis matrix B^-1 and coefficient matrix A (i.e. from B^-1 * A)
| lp | LP data |
| r | row number |
| binvrow | row in B^-1 from prior call to SCIPlpGetBInvRow(), or NULL |
| coef | pointer to store the coefficients of the row |
| inds | array to store the non-zero indices, or NULL |
| ninds | pointer to store the number of non-zero indices, or NULL (-1: if we do not store sparsity informations) |
Definition at line 9596 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, SCIPlpiGetBInvARow(), SCIP_Lp::solisbasic, and SCIP_Lp::solved.
Referenced by SCIPgetLPBInvARow().
| SCIP_RETCODE SCIPlpGetBInvACol | ( | SCIP_LP * | lp, |
| int | c, | ||
| SCIP_Real * | coef, | ||
| int * | inds, | ||
| int * | ninds | ||
| ) |
gets a column from the product of inverse basis matrix B^-1 and coefficient matrix A (i.e. from B^-1 * A), i.e., it computes B^-1 * A_c with A_c being the c'th column of A
| lp | LP data |
| c | column number which can be accessed by SCIPcolGetLPPos() |
| coef | pointer to store the coefficients of the column |
| inds | array to store the non-zero indices, or NULL |
| ninds | pointer to store the number of non-zero indices, or NULL (-1: if we do not store sparsity informations) |
Definition at line 9621 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, SCIPlpiGetBInvACol(), SCIP_Lp::solisbasic, and SCIP_Lp::solved.
Referenced by SCIPgetLPBInvACol().
| SCIP_RETCODE SCIPlpSumRows | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_PROB * | prob, | ||
| SCIP_Real * | weights, | ||
| SCIP_REALARRAY * | sumcoef, | ||
| SCIP_Real * | sumlhs, | ||
| SCIP_Real * | sumrhs | ||
| ) |
calculates a weighted sum of all LP rows; for negative weights, the left and right hand side of the corresponding LP row are swapped in the summation
| lp | LP data |
| set | global SCIP settings |
| prob | problem data |
| weights | row weights in row summation |
| sumcoef | array to store sum coefficients indexed by variables' probindex |
| sumlhs | pointer to store the left hand side of the row summation |
| sumrhs | pointer to store the right hand side of the row summation |
Definition at line 9645 of file lp.c.
References SCIP_Row::cols, SCIP_Row::cols_index, SCIP_Row::constant, FALSE, SCIP_Row::len, SCIP_Row::lhs, SCIP_Lp::nrows, NULL, SCIP_Prob::nvars, SCIP_Row::rhs, SCIP_Lp::rows, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIPrealarrayClear(), SCIPrealarrayExtend(), SCIPrealarrayIncVal(), SCIPsetInfinity(), SCIPsetIsInfinity(), SCIPsetIsZero(), SCIPvarGetCol(), SCIPvarGetProbindex(), SCIPvarGetStatus(), SCIP_Row::vals, SCIP_Col::var, and SCIP_Col::var_probindex.
Referenced by SCIPsumLPRows().
| SCIP_RETCODE SCIPlpGetState | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_LPISTATE ** | lpistate | ||
| ) |
stores LP state (like basis information) into LP state object
| lp | LP data |
| blkmem | block memory |
| lpistate | pointer to LP state information (like basis information) |
Definition at line 9731 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, NULL, SCIP_CALL, SCIP_OKAY, SCIPlpiGetState(), and SCIP_Lp::solved.
Referenced by forkCreate(), forkFree(), probingnodeUpdate(), and SCIPtreeStartProbing().
| SCIP_RETCODE SCIPlpSetState | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LPISTATE * | lpistate, | ||
| SCIP_Bool | wasprimfeas, | ||
| SCIP_Bool | wasprimchecked, | ||
| SCIP_Bool | wasdualfeas, | ||
| SCIP_Bool | wasdualchecked | ||
| ) |
loads LP state (like basis information) into solver
| lp | LP data |
| blkmem | block memory |
| set | global SCIP settings |
| eventqueue | event queue |
| lpistate | LP state information (like basis information) |
| wasprimfeas | primal feasibility when LP state information was stored |
| wasprimchecked | true if the LP solution has passed the primal feasibility check |
| wasdualfeas | dual feasibility when LP state information was stored |
| wasdualchecked | true if the LP solution has passed the dual feasibility check |
Definition at line 9755 of file lp.c.
References SCIP_Lp::dualchecked, SCIP_Lp::dualfeasible, FALSE, SCIP_Lp::flushed, SCIP_Lp::lpi, NULL, SCIP_Lp::primalchecked, SCIP_Lp::primalfeasible, SCIP_CALL, SCIP_OKAY, SCIPlpFlush(), SCIPlpiHasStateBasis(), SCIPlpiSetState(), SCIP_Lp::solisbasic, and SCIP_Lp::solved.
Referenced by SCIPlpEndDive(), SCIPtreeEndProbing(), SCIPtreeLoadLPState(), and SCIPtreeLoadProbingLPState().
| SCIP_RETCODE SCIPlpFreeState | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_LPISTATE ** | lpistate | ||
| ) |
frees LP state information
| lp | LP data |
| blkmem | block memory |
| lpistate | pointer to LP state information (like basis information) |
Definition at line 9797 of file lp.c.
References SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, and SCIPlpiFreeState().
Referenced by forkReleaseLPIState(), probingnodeFree(), probingnodeUpdate(), SCIPlpEndDive(), SCIPtreeEndProbing(), and subrootReleaseLPIState().
| SCIP_RETCODE SCIPlpGetNorms | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_LPINORMS ** | lpinorms | ||
| ) |
stores pricing norms into LP norms object
| lp | LP data |
| blkmem | block memory |
| lpinorms | pointer to LP pricing norms information |
Definition at line 9814 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, NULL, SCIP_CALL, SCIP_OKAY, SCIPlpiGetNorms(), and SCIP_Lp::solved.
Referenced by SCIPtreeStartProbing().
| SCIP_RETCODE SCIPlpSetNorms | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_LPINORMS * | lpinorms | ||
| ) |
loads pricing norms from LP norms object into solver
| lp | LP data |
| blkmem | block memory |
| lpinorms | LP pricing norms information |
Definition at line 9838 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, and SCIPlpiSetNorms().
Referenced by SCIPtreeEndProbing(), and SCIPtreeLoadProbingLPState().
| SCIP_RETCODE SCIPlpFreeNorms | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_LPINORMS ** | lpinorms | ||
| ) |
frees pricing norms information
| lp | LP data |
| blkmem | block memory |
| lpinorms | pointer to LP pricing norms information |
Definition at line 9858 of file lp.c.
References SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, and SCIPlpiFreeNorms().
Referenced by SCIPtreeEndProbing().
return the current cutoff bound of the lp
| lp | current LP data |
Definition at line 9872 of file lp.c.
References SCIP_Lp::cutoffbound, and NULL.
Referenced by SCIPreoptCheckCutoff().
| SCIP_RETCODE SCIPlpSetCutoffbound | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_PROB * | prob, | ||
| SCIP_Real | cutoffbound | ||
| ) |
sets the upper objective limit of the LP solver
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
| cutoffbound | new upper objective limit |
Definition at line 9882 of file lp.c.
References SCIP_Lp::cutoffbound, FALSE, SCIP_Lp::flushed, lpCutoffDisabled, SCIP_Lp::lpobjval, SCIP_Lp::lpsolstat, NULL, SCIP_INVALID, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_LPSOLSTAT_OBJLIMIT, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIPlpDivingObjChanged(), SCIPlpGetObjval(), SCIPlpGetSolstat(), SCIPsetDebugMsg, SCIPsetIsInfinity(), and SCIP_Lp::solved.
Referenced by primalSetCutoffbound(), SCIPchgCutoffboundDive(), SCIPchgVarObjDive(), SCIPchgVarObjProbing(), SCIPendDive(), and treeBacktrackProbing().
|
static |
returns the name of the given LP algorithm
| lpalgo | LP algorithm |
Definition at line 9928 of file lp.c.
References SCIP_LPALGO_BARRIER, SCIP_LPALGO_BARRIERCROSSOVER, SCIP_LPALGO_DUALSIMPLEX, SCIP_LPALGO_PRIMALSIMPLEX, SCIPABORT, and SCIPerrorMessage.
Referenced by lpAlgorithm(), lpSolve(), and lpSolveStable().
|
static |
calls LPI to perform primal simplex, measures time and counts iterations, gets basis feasibility status
| lp | current LP data |
| set | global SCIP settings |
| stat | problem statistics |
| resolve | is this a resolving call (starting with feasible basis)? |
| keepsol | should the old LP solution be kept if no iterations were performed? |
| lperror | pointer to store whether an unresolved LP error occurred |
Definition at line 9951 of file lp.c.
References SCIP_Lp::diving, SCIP_Stat::divinglptime, FALSE, SCIP_Lp::flushed, SCIP_Lp::lastlpalgo, SCIP_Stat::lpcount, SCIP_Lp::lpi, SCIP_Lp::lpidualfeastol, SCIP_Lp::lpifastmip, SCIP_Lp::lpifeastol, SCIP_Lp::lpifromscratch, SCIP_Lp::lpipresolving, SCIP_Lp::lpiscaling, SCIP_Lp::lpiuobjlim, SCIP_Lp::ncols, SCIP_Stat::ndivinglps, SCIP_Stat::nlps, SCIP_Stat::nnodes, SCIP_Stat::nprimallps, SCIP_Lp::nrows, NULL, SCIP_Stat::primallptime, SCIP_Lp::probing, SCIP_CALL, SCIP_LPALGO_PRIMALSIMPLEX, SCIP_LPERROR, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIPclockGetTime(), SCIPclockStart(), SCIPclockStop(), SCIPlpGetIterations(), SCIPlpiSolvePrimal(), SCIPlpWrite(), SCIPsetDebugMsg, SCIPsnprintf(), SCIPstatAdd, SCIPstatIncrement, SCIPstatUpdate, SCIP_Lp::solisbasic, SCIP_Lp::strongbranchprobing, SCIP_Stat::strongbranchtime, TRUE, SCIP_Lp::validfarkaslp, and SCIP_Lp::validsollp.
Referenced by lpAlgorithm().
|
static |
calls LPI to perform dual simplex, measures time and counts iterations
| lp | current LP data |
| set | global SCIP settings |
| stat | problem statistics |
| resolve | is this a resolving call (starting with feasible basis)? |
| keepsol | should the old LP solution be kept if no iterations were performed? |
| lperror | pointer to store whether an unresolved LP error occurred |
Definition at line 10092 of file lp.c.
References SCIP_Lp::diving, SCIP_Stat::divinglptime, SCIP_Stat::duallptime, FALSE, SCIP_Lp::flushed, SCIP_Lp::lastlpalgo, SCIP_Stat::lpcount, SCIP_Lp::lpi, SCIP_Lp::lpidualfeastol, SCIP_Lp::lpifastmip, SCIP_Lp::lpifeastol, SCIP_Lp::lpifromscratch, SCIP_Lp::lpipresolving, SCIP_Lp::lpiscaling, SCIP_Lp::lpiuobjlim, SCIP_Lp::ncols, SCIP_Stat::ndivinglps, SCIP_Stat::nduallps, SCIP_Stat::nlps, SCIP_Stat::nnodes, SCIP_Lp::nrows, NULL, SCIP_Lp::probing, SCIP_CALL, SCIP_LPALGO_DUALSIMPLEX, SCIP_LPERROR, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIPclockGetTime(), SCIPclockStart(), SCIPclockStop(), SCIPlpGetIterations(), SCIPlpiSolveDual(), SCIPlpWrite(), SCIPsetDebugMsg, SCIPsnprintf(), SCIPstatAdd, SCIPstatIncrement, SCIPstatUpdate, SCIP_Lp::solisbasic, SCIP_Lp::strongbranchprobing, SCIP_Stat::strongbranchtime, TRUE, SCIP_Lp::validfarkaslp, and SCIP_Lp::validsollp.
Referenced by lpAlgorithm().
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calls LPI to perform lexicographic dual simplex to find a lexicographically minimal optimal solution, measures time and counts iterations
We follow the approach of the following paper to find a lexicographically minimal optimal solution:
Zanette, Fischetti, Balas
Can pure cutting plane algorithms work?
IPCO 2008, Bertinoro, Italy.
We do, however, not aim for the exact lexicographically minimal optimal solutions, but perform a heuristic, i.e., we limit the number of components which are minimized.
More precisely, we first solve the problem with the dual simplex algorithm. Then we fix those nonbasic variables to their current value (i.e., one of the bounds except maybe for free variables) that have nonzero reduced cost. This fixes the objective function value, because only pivots that will not change the objective are allowed afterwards.
Then the not yet fixed variables are considered in turn. If they are at their lower bounds and nonbasic, they are fixed to this bound, since their value cannot be decreased further. Once a candidate is found, we set the objective to minimize this variable. We run the primal simplex algorithm (since the objective is changed the solution is not dual feasible anymore; if variables out of the basis have been fixed to their lower bound, the basis is also not primal feasible anymore). After the optimization, we again fix nonbasic variables that have nonzero reduced cost. We then choose the next variable and iterate.
We stop the process once we do not find candidates or have performed a maximum number of iterations.
| lp | current LP data |
| set | global SCIP settings |
| stat | problem statistics |
| resolve | is this a resolving call (starting with feasible basis)? |
| keepsol | should the old LP solution be kept if no iterations were performed? |
| lperror | pointer to store whether an unresolved LP error occurred |
Definition at line 10266 of file lp.c.
References SCIP_Lp::diving, SCIP_Stat::divinglptime, SCIP_Stat::duallptime, FALSE, SCIP_Lp::flushed, SCIP_Lp::lastlpalgo, SCIP_Stat::lexduallptime, SCIP_Stat::lpcount, SCIP_Lp::lpi, SCIP_Lp::lpifromscratch, SCIP_Lp::ncols, SCIP_Stat::ndivinglps, SCIP_Stat::nduallps, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, SCIP_Stat::nlps, SCIP_Stat::nnodes, SCIP_Lp::nrows, NULL, SCIP_Lp::probing, SCIP_BASESTAT_BASIC, SCIP_BASESTAT_LOWER, SCIP_BASESTAT_UPPER, SCIP_BASESTAT_ZERO, SCIP_Bool, SCIP_CALL, SCIP_LPALGO_DUALSIMPLEX, SCIP_LPERROR, SCIP_OKAY, SCIP_Real, SCIPABORT, SCIPclockGetTime(), SCIPclockStart(), SCIPclockStop(), SCIPerrorMessage, SCIPlpGetIterations(), SCIPlpiChgBounds(), SCIPlpiChgObj(), SCIPlpiChgSides(), SCIPlpiGetBase(), SCIPlpiGetBounds(), SCIPlpiGetObj(), SCIPlpiGetSides(), SCIPlpiGetSol(), SCIPlpiIsOptimal(), SCIPlpiSolveDual(), SCIPlpiSolvePrimal(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPsetIsDualfeasZero(), SCIPsetIsFeasEQ(), SCIPsetIsFeasPositive(), SCIPsetIsFeasZero(), SCIPsetIsInfinity(), SCIPsetIsIntegral(), SCIPstatAdd, SCIPstatIncrement, SCIPstatUpdate, SCIP_Lp::solisbasic, SCIP_Lp::strongbranchprobing, SCIP_Stat::strongbranchtime, TRUE, SCIP_Lp::validfarkaslp, and SCIP_Lp::validsollp.
Referenced by lpAlgorithm().
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calls LPI to perform barrier, measures time and counts iterations, gets basis feasibility status
| lp | current LP data |
| set | global SCIP settings |
| stat | problem statistics |
| crossover | should crossover be performed? |
| keepsol | should the old LP solution be kept if no iterations were performed? |
| lperror | pointer to store whether an unresolved LP error occurred |
Definition at line 10864 of file lp.c.
References SCIP_Stat::barrierlptime, SCIP_Lp::diving, SCIP_Stat::divinglptime, SCIP_Stat::duallptime, FALSE, SCIP_Lp::flushed, SCIP_Lp::lastlpalgo, SCIP_Stat::lpcount, SCIP_Lp::lpi, SCIP_Lp::lpibarrierconvtol, SCIP_Lp::lpidualfeastol, SCIP_Lp::lpifastmip, SCIP_Lp::lpifeastol, SCIP_Lp::lpifromscratch, SCIP_Lp::lpipresolving, SCIP_Lp::lpiscaling, SCIP_Lp::lpiuobjlim, SCIP_Stat::nbarrierlps, SCIP_Lp::ncols, SCIP_Stat::ndivinglps, SCIP_Stat::nlps, SCIP_Stat::nnodes, SCIP_Lp::nrows, NULL, SCIP_Lp::probing, SCIP_CALL, SCIP_LPALGO_BARRIER, SCIP_LPALGO_BARRIERCROSSOVER, SCIP_LPERROR, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIPclockGetTime(), SCIPclockStart(), SCIPclockStop(), SCIPlpGetIterations(), SCIPlpiSolveBarrier(), SCIPlpWrite(), SCIPsetDebugMsg, SCIPsnprintf(), SCIPstatAdd, SCIPstatIncrement, SCIPstatUpdate, SCIP_Lp::solisbasic, SCIP_Lp::strongbranchprobing, SCIP_Stat::strongbranchtime, TRUE, SCIP_Lp::validfarkaslp, and SCIP_Lp::validsollp.
Referenced by lpAlgorithm().
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solves the LP with the given algorithm
| lp | current LP data |
| set | global SCIP settings |
| stat | problem statistics |
| lpalgo | LP algorithm that should be applied |
| resolve | is this a resolving call (starting with feasible basis)? |
| keepsol | should the old LP solution be kept if no iterations were performed? |
| timelimit | pointer to store whether the time limit was hit |
| lperror | pointer to store whether an unresolved LP error occurred |
Definition at line 11001 of file lp.c.
References SCIP_Lp::dualfeasible, FALSE, SCIP_Lp::flushed, SCIP_Lp::installing, lpalgoName(), lpBarrier(), lpDualSimplex(), SCIP_Lp::lpi, lpLexDualSimplex(), lpPrimalSimplex(), lpSetRealpar(), SCIP_Stat::maxdepth, NULL, SCIP_Lp::primalfeasible, SCIP_Bool, SCIP_CALL, SCIP_INVALIDDATA, SCIP_LPALGO_BARRIER, SCIP_LPALGO_BARRIERCROSSOVER, SCIP_LPALGO_DUALSIMPLEX, SCIP_LPALGO_PRIMALSIMPLEX, SCIP_LPPAR_LPTILIM, SCIP_OKAY, SCIP_Real, SCIPclockGetTime(), SCIPerrorMessage, SCIPlpiGetSolFeasibility(), SCIPlpiInfinity(), SCIPsetDebugMsg, SCIP_Stat::solvingtime, and TRUE.
Referenced by lpSolveStable().
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prints message about numerical trouble
If message has verblevel at most high and display/verblevel is not full, then the message is not printed if already MAXNUMTROUBLELPMSGS messages were printed before in the current run.
| messagehdlr | message handler |
| set | global SCIP settings |
| stat | problem statistics |
| verblevel | verbosity level of message |
| formatstr | message format string |
Definition at line 11092 of file lp.c.
References MAXNUMTROUBLELPMSGS, SCIP_Stat::nlps, SCIP_Stat::nnodes, SCIP_Stat::nnumtroublelpmsgs, NULL, SCIP_VERBLEVEL_FULL, SCIP_VERBLEVEL_HIGH, SCIP_VERBLEVEL_NONE, SCIPmessagePrintInfo(), and SCIPmessageVFPrintInfo().
Referenced by lpSolveStable(), SCIPlpEndDive(), and SCIPlpSolveAndEval().
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solves the LP with the given LP algorithm, and tries to resolve numerical problems
| lp | current LP data |
| set | global SCIP settings |
| messagehdlr | message handler |
| stat | problem statistics |
| prob | problem data |
| lpalgo | LP algorithm that should be applied |
| itlim | maximal number of LP iterations to perform in first LP calls (before solving from scratch), or -1 for no limit |
| harditlim | maximal number of LP iterations to perform (hard limit for all LP calls), or -1 for no limit |
| resolve | is this a resolving call (starting with feasible basis)? |
| fastmip | which FASTMIP setting of LP solver should be used? |
| tightprimfeastol | should a tighter primal feasibility tolerance be used? |
| tightdualfeastol | should a tighter dual feasibility tolerance be used? |
| fromscratch | should the LP be solved from scratch without using current basis? |
| keepsol | should the old LP solution be kept if no iterations were performed? |
| timelimit | pointer to store whether the time limit was hit |
| lperror | pointer to store whether an unresolved LP error occurred |
Definition at line 11147 of file lp.c.
References SCIP_Lp::cutoffbound, FALSE, FEASTOLTIGHTFAC, SCIP_Lp::flushed, getFiniteLooseObjval(), SCIP_Lp::looseobjvalinf, lpalgoName(), lpAlgorithm(), lpCopyIntegrality(), SCIP_Lp::lpi, SCIP_Lp::lpihaspolishing, lpNumericalTroubleMessage(), lpSetBarrierconvtol(), lpSetConditionLimit(), lpSetDualfeastol(), lpSetFastmip(), lpSetFeastol(), lpSetFromscratch(), lpSetIterationLimit(), lpSetLPInfo(), lpSetPresolving(), lpSetPricingChar(), lpSetRandomseed(), lpSetRowrepswitch(), lpSetScaling(), lpSetSolutionPolishing(), lpSetThreads(), lpSetTiming(), lpSetUobjlim(), SCIP_Stat::nnodes, NULL, SCIP_Lp::probing, SCIP_Bool, SCIP_CALL, SCIP_ERROR, SCIP_LPALGO_DUALSIMPLEX, SCIP_LPALGO_PRIMALSIMPLEX, SCIP_OKAY, SCIP_VERBLEVEL_FULL, SCIP_VERBLEVEL_HIGH, SCIPerrorMessage, SCIPlpiIgnoreInstability(), SCIPlpiIsIterlimExc(), SCIPlpiIsStable(), SCIPsetBarrierconvtol(), SCIPsetDualfeastol(), SCIPsetInitializeRandomSeed(), SCIPsetIsInfinity(), SCIPsetLpfeastol(), TRUE, and SCIP_Lp::updateintegrality.
Referenced by lpSolve().
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adjust the LP objective value if its greater/less than +/- SCIPsetInfinity()
| lp | current LP data |
| set | global SCIP settings |
| messagehdlr | message handler |
Definition at line 11560 of file lp.c.
References SCIP_Lp::adjustlpval, SCIP_Lp::lpobjval, NULL, SCIPmessagePrintWarning(), SCIPsetInfinity(), SCIPsetIsInfinity(), and TRUE.
Referenced by lpSolve().
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solves the LP with the given algorithm and evaluates return status
| lp | current LP data |
| set | global SCIP settings |
| messagehdlr | message handler |
| stat | problem statistics |
| prob | problem data |
| lpalgo | LP algorithm that should be applied |
| resolveitlim | maximal number of LP iterations to perform in resolving calls, or -1 for no limit |
| harditlim | maximal number of LP iterations to perform (hard limit for all LP calls), or -1 for no limit |
| needprimalray | if the LP is unbounded, do we need a primal ray? |
| needdualray | if the LP is infeasible, do we need a dual ray? |
| resolve | is this a resolving call (starting with feasible basis)? |
| fastmip | which FASTMIP setting of LP solver should be used? |
| tightprimfeastol | should a tighter primal feasibility tolerance be used? |
| tightdualfeastol | should a tighter dual feasibility tolerance be used? |
| fromscratch | should the LP be solved from scratch without using current basis? |
| keepsol | should the old LP solution be kept if no iterations were performed? |
| lperror | pointer to store whether an unresolved LP error occurred |
Definition at line 11591 of file lp.c.
References adjustLPobjval(), checkLinks, SCIP_Lp::cutoffbound, SCIP_Lp::dualfeasible, FALSE, SCIP_Lp::flushed, getFiniteLooseObjval(), SCIP_Lp::lastlpalgo, lpalgoName(), lpCutoffDisabled, SCIP_Lp::lpi, SCIP_Lp::lpiuobjlim, SCIP_Lp::lpobjval, SCIP_Lp::lpsolstat, lpSolveStable(), SCIP_Stat::nlps, SCIP_Stat::nnodes, NULL, SCIP_Lp::primalfeasible, SCIP_Bool, SCIP_CALL, SCIP_LPALGO_DUALSIMPLEX, SCIP_LPALGO_PRIMALSIMPLEX, SCIP_LPERROR, SCIP_LPSOLSTAT_ERROR, SCIP_LPSOLSTAT_INFEASIBLE, SCIP_LPSOLSTAT_ITERLIMIT, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_LPSOLSTAT_OBJLIMIT, SCIP_LPSOLSTAT_OPTIMAL, SCIP_LPSOLSTAT_TIMELIMIT, SCIP_LPSOLSTAT_UNBOUNDEDRAY, SCIP_OKAY, SCIP_VERBLEVEL_FULL, SCIPerrorMessage, SCIPlpiExistsPrimalRay(), SCIPlpiGetInternalStatus(), SCIPlpiGetObjval(), SCIPlpiHasDualRay(), SCIPlpiHasPrimalRay(), SCIPlpiIsDualFeasible(), SCIPlpiIsIterlimExc(), SCIPlpiIsObjlimExc(), SCIPlpiIsOptimal(), SCIPlpiIsPrimalFeasible(), SCIPlpiIsPrimalInfeasible(), SCIPlpiIsTimelimExc(), SCIPmessagePrintVerbInfo(), SCIPsetDebugMsg, SCIPsetInfinity(), SCIPsetIsGE(), SCIPsetIsInfinity(), SCIPsetIsLE(), SCIP_Lp::solved, and TRUE.
Referenced by lpFlushAndSolve(), and SCIPlpSolveAndEval().
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flushes the LP and solves it with the primal or dual simplex algorithm, depending on the current basis feasibility
| lp | current LP data |
| blkmem | block memory |
| set | global SCIP settings |
| messagehdlr | message handler |
| stat | problem statistics |
| prob | problem data |
| eventqueue | event queue |
| resolveitlim | maximal number of LP iterations to perform in resolving calls, or -1 for no limit |
| harditlim | maximal number of LP iterations to perform (hard limit for all LP calls), or -1 for no limit |
| needprimalray | if the LP is unbounded, do we need a primal ray? |
| needdualray | if the LP is infeasible, do we need a dual ray? |
| fastmip | which FASTMIP setting of LP solver should be used? |
| tightprimfeastol | should a tighter primal feasibility tolerance be used? |
| tightdualfeastol | should a tighter dual feasibility tolerance be used? |
| fromscratch | should the LP be solved from scratch without using current basis? |
| keepsol | should the old LP solution be kept if no iterations were performed? |
| lperror | pointer to store whether an unresolved LP error occurred |
Definition at line 11762 of file lp.c.
References SCIP_Lp::dualfeasible, SCIP_Lp::flushaddedcols, SCIP_Lp::flushdeletedcols, lpSolve(), NULL, SCIP_Lp::primalfeasible, SCIP_Bool, SCIP_CALL, SCIP_LPALGO_BARRIER, SCIP_LPALGO_BARRIERCROSSOVER, SCIP_LPALGO_DUALSIMPLEX, SCIP_LPALGO_PRIMALSIMPLEX, SCIP_OKAY, SCIP_PARAMETERWRONGVAL, SCIPerrorMessage, SCIPlpFlush(), SCIPsetDebugMsg, SCIP_Lp::solisbasic, and SCIP_Lp::solved.
Referenced by SCIPlpSolveAndEval().
checks if the lazy bounds are valid
| lp | LP data |
| set | global SCIP settings |
Definition at line 11851 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lazycols, SCIP_Col::lazylb, SCIP_Col::lazyub, SCIP_Lp::nlazycols, SCIP_Col::primsol, SCIPsetIsFeasGE(), SCIPsetIsFeasLE(), and SCIPsetIsInfinity().
Referenced by SCIPlpSolveAndEval().
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marks all lazy columns to be changed; this is needed for reloading/removing bounds of these columns before and after diving
| lp | LP data |
| set | global SCIP settings |
Definition at line 11878 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::divinglazyapplied, SCIP_Col::flushedlb, SCIP_Col::flushedub, insertColChgcols(), SCIP_Lp::lazycols, SCIP_Col::lazylb, SCIP_Col::lazyub, SCIP_Col::lb, SCIP_Col::lbchanged, SCIP_Lp::lpi, SCIP_Lp::nlazycols, SCIP_CALL, SCIP_OKAY, SCIPlpiInfinity(), SCIPsetDebugMsg, SCIPsetIsGT(), SCIPsetIsInfinity(), SCIPsetIsLT(), TRUE, SCIP_Col::ub, and SCIP_Col::ubchanged.
Referenced by SCIPlpEndDive(), and SCIPlpSolveAndEval().
returns the iteration limit for an LP resolving call
| set | global SCIP settings |
| stat | dynamic problem statistics |
| itlim | hard iteration limit |
Definition at line 11940 of file lp.c.
References MAX, MIN, SCIP_Stat::nlpiterations, SCIP_Stat::nlps, SCIP_Stat::nrootlpiterations, SCIP_Stat::nrootlps, and SCIP_Real.
Referenced by SCIPlpSolveAndEval().
| SCIP_RETCODE SCIPlpSolveAndEval | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_MESSAGEHDLR * | messagehdlr, | ||
| BMS_BLKMEM * | blkmem, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter, | ||
| SCIP_PROB * | prob, | ||
| SCIP_Longint | itlim, | ||
| SCIP_Bool | limitresolveiters, | ||
| SCIP_Bool | aging, | ||
| SCIP_Bool | keepsol, | ||
| SCIP_Bool * | lperror | ||
| ) |
solves the LP with simplex algorithm, and copy the solution into the column's data
| lp | LP data |
| set | global SCIP settings |
| messagehdlr | message handler |
| blkmem | block memory buffers |
| stat | problem statistics |
| eventqueue | event queue |
| eventfilter | global event filter |
| prob | problem data |
| itlim | maximal number of LP iterations to perform, or -1 for no limit |
| limitresolveiters | should LP iterations for resolving calls be limited? (limit is computed within the method w.r.t. the average LP iterations) |
| aging | should aging and removal of obsolete cols/rows be applied? |
| keepsol | should the old LP solution be kept if no iterations were performed? |
| lperror | pointer to store whether an unresolved LP error occurred |
Definition at line 11960 of file lp.c.
References checkLazyBounds(), SCIP_Lp::cutoffbound, SCIP_Lp::diving, SCIP_Lp::divinglazyapplied, SCIP_Lp::dualchecked, SCIP_Lp::dualfeasible, FALSE, SCIP_Lp::flushaddedcols, SCIP_Lp::flushdeletedcols, SCIP_Lp::flushed, getFiniteLooseObjval(), SCIP_Lp::lastlpalgo, lpCutoffDisabled, lpFlushAndSolve(), lpGetResolveItlim(), SCIP_Lp::lpi, SCIP_Lp::lpifromscratch, SCIP_Lp::lpihasfastmip, SCIP_Lp::lpiuobjlim, lpNumericalTroubleMessage(), SCIP_Lp::lpobjval, lpSetFromscratch(), SCIP_Lp::lpsolstat, lpSolve(), MIN, SCIP_Stat::nclockskipsleft, SCIP_Lp::ncols, SCIP_Lp::nlazycols, SCIP_Stat::nlps, SCIP_Stat::nnodes, SCIP_Lp::nrows, NULL, SCIP_Prob::nvars, SCIP_Lp::primalchecked, SCIP_Lp::primalfeasible, SCIP_Lp::probing, SCIP_Bool, SCIP_CALL, SCIP_ERROR, SCIP_Longint, SCIP_LPALGO_DUALSIMPLEX, SCIP_LPALGO_PRIMALSIMPLEX, SCIP_LPERROR, SCIP_LPSOLSTAT_ERROR, SCIP_LPSOLSTAT_INFEASIBLE, SCIP_LPSOLSTAT_ITERLIMIT, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_LPSOLSTAT_OBJLIMIT, SCIP_LPSOLSTAT_OPTIMAL, SCIP_LPSOLSTAT_TIMELIMIT, SCIP_LPSOLSTAT_UNBOUNDEDRAY, SCIP_OKAY, SCIP_Real, SCIP_STATUS_TIMELIMIT, SCIP_VERBLEVEL_FULL, SCIP_VERBLEVEL_HIGH, SCIPerrorMessage, SCIPlpFlush(), SCIPlpGetDualfarkas(), SCIPlpGetLPI(), SCIPlpGetSol(), SCIPlpGetSolstat(), SCIPlpGetUnboundedSol(), SCIPlpiGetObjval(), SCIPlpiHasDualRay(), SCIPlpiInfinity(), SCIPlpiIsObjlimExc(), SCIPlpRemoveNewObsoletes(), SCIPlpUpdateAges(), SCIPmessagePrintVerbInfo(), SCIPmessagePrintWarning(), SCIPprobAllColsInLP(), SCIPsetDebugMsg, SCIPsetGetCharParam(), SCIPsetInfinity(), SCIPsetIsFeasNegative(), SCIPsetIsGE(), SCIPsetIsLT(), SCIPsetSetCharParam(), SCIPsolveIsStopped(), SCIP_Lp::solved, SCIP_Stat::status, TRUE, and updateLazyBounds().
Referenced by focusnodeToFork(), priceAndCutLoop(), SCIPlpEndDive(), SCIPpriceLoop(), SCIPsolveDiveLP(), SCIPtreeEndProbing(), separationRoundResolveLP(), solveNodeInitialLP(), solveNodeLP(), and solveProbingLP().
| SCIP_LPSOLSTAT SCIPlpGetSolstat | ( | SCIP_LP * | lp | ) |
gets solution status of current LP
| lp | current LP data |
Definition at line 12527 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpsolstat, NULL, SCIP_LPSOLSTAT_NOTSOLVED, and SCIP_Lp::solved.
Referenced by branchcandCalcLPCands(), conflictAnalyzeBoundexceedingLP(), conflictAnalyzeInfeasibleLP(), enforceConstraints(), focusnodeToFork(), forkCreate(), forkFree(), nodeToLeaf(), priceAndCutLoop(), propAndSolve(), SCIPconflictAnalyzeLP(), SCIPgetLPBranchCands(), SCIPgetLPSolstat(), SCIPgetNLPBranchCands(), SCIPgetNPrioLPBranchCands(), SCIPlpCleanupAll(), SCIPlpCleanupNew(), SCIPlpEndDive(), SCIPlpGetSol(), SCIPlpRemoveAllObsoletes(), SCIPlpRemoveNewObsoletes(), SCIPlpSetCutoffbound(), SCIPlpSolveAndEval(), SCIPlpStartDive(), SCIPnodeCutoff(), SCIPnodeFocus(), SCIPnodepqBound(), SCIPpriceLoop(), SCIPpricerExec(), SCIPpricestoreAddProbVars(), SCIPprobUpdateBestRootSol(), SCIPreoptCheckCutoff(), SCIPsolveCIP(), SCIPsolveDiveLP(), SCIPtreeCutoff(), SCIPtreeEndProbing(), SCIPtreeStartProbing(), separationRoundLP(), solveNode(), solveNodeInitialLP(), solveNodeLP(), solveProbingLP(), updateEstimate(), updatePrimalRay(), and updatePseudocost().
gets objective value of current LP
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
Definition at line 12543 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::looseobjval, SCIP_Lp::looseobjvalid, SCIP_Lp::looseobjvalinf, SCIP_Lp::lpobjval, SCIP_Lp::nloosevars, NULL, recomputeLooseObjectiveValue(), SCIP_INVALID, SCIPsetInfinity(), SCIPsetIsInfinity(), and SCIP_Lp::solved.
Referenced by addCurrentSolution(), analyzeStrongbranch(), enforceConstraints(), forkCreate(), forkFree(), priceAndCutLoop(), propAndSolve(), SCIPcolGetStrongbranch(), SCIPcolGetStrongbranches(), SCIPgetLPObjval(), SCIPgetSolOrigObj(), SCIPgetSolTransObj(), SCIPlpSetCutoffbound(), SCIPnodeUpdateLowerboundLP(), SCIPprobUpdateBestRootSol(), SCIPsolLinkLPSol(), SCIPsolveCIP(), solveNode(), solveNodeInitialLP(), solveNodeLP(), and updatePseudocost().
gets part of objective value of current LP that results from COLUMN variables only
| lp | current LP data |
Definition at line 12571 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpobjval, NULL, SCIP_INVALID, and SCIP_Lp::solved.
Referenced by SCIPgetLPColumnObjval(), SCIPlpStoreRootObjval(), and SCIPprobStoreRootSol().
gets part of objective value of current LP that results from LOOSE variables only
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
Definition at line 12582 of file lp.c.
References SCIP_Lp::flushed, getFiniteLooseObjval(), SCIP_Lp::looseobjval, SCIP_Lp::looseobjvalinf, SCIP_Lp::nloosevars, NULL, SCIP_INVALID, SCIPsetInfinity(), and SCIP_Lp::solved.
Referenced by performStrongbranchWithPropagation(), SCIPgetLPLooseObjval(), SCIPlpStoreRootObjval(), and SCIPsolLinkLPSol().
remembers the current LP objective value as root solution value
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
Definition at line 12602 of file lp.c.
References NULL, SCIP_Lp::rootlooseobjval, SCIP_Lp::rootlpobjval, SCIPlpGetColumnObjval(), and SCIPlpGetLooseObjval().
Referenced by SCIPprobStoreRootSol().
| void SCIPlpInvalidateRootObjval | ( | SCIP_LP * | lp | ) |
invalidates the root LP solution value
| lp | current LP data |
Definition at line 12615 of file lp.c.
References NULL, SCIP_Lp::rootlooseobjval, SCIP_Lp::rootlpobjval, and SCIP_INVALID.
Referenced by freeReoptSolve(), and freeSolve().
recomputes local and global pseudo objective values
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
Definition at line 12626 of file lp.c.
References SCIP_Lp::glbpseudoobjval, SCIP_Lp::glbpseudoobjvalid, SCIP_Lp::glbpseudoobjvalinf, NULL, SCIP_Prob::nvars, SCIP_Lp::pseudoobjval, SCIP_Lp::pseudoobjvalid, SCIP_Lp::pseudoobjvalinf, SCIP_Lp::relglbpseudoobjval, SCIP_Lp::relpseudoobjval, SCIP_Real, SCIPsetIsInfinity(), SCIPsetIsNegative(), SCIPsetIsPositive(), SCIPvarGetLbGlobal(), SCIPvarGetLbLocal(), SCIPvarGetObj(), SCIPvarGetUbGlobal(), SCIPvarGetUbLocal(), TRUE, and SCIP_Prob::vars.
Referenced by prepareReoptimization(), and treeBacktrackProbing().
gets the global pseudo objective value; that is all variables set to their best (w.r.t. the objective function) global bound
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
Definition at line 12694 of file lp.c.
References SCIP_Lp::glbpseudoobjval, SCIP_Lp::glbpseudoobjvalid, SCIP_Lp::glbpseudoobjvalinf, NULL, recomputeGlbPseudoObjectiveValue(), SCIPsetInfinity(), and SCIPsetIsInfinity().
Referenced by SCIPgetGlobalPseudoObjval(), and solveNode().
gets the pseudo objective value for the current search node; that is all variables set to their best (w.r.t. the objective function) local bound
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
Definition at line 12723 of file lp.c.
References NULL, SCIP_Lp::pseudoobjval, SCIP_Lp::pseudoobjvalid, SCIP_Lp::pseudoobjvalinf, recomputePseudoObjectiveValue(), SCIPsetInfinity(), and SCIPsetIsInfinity().
Referenced by applyBounding(), enforceConstraints(), SCIPconflictAnalyzePseudo(), SCIPgetPseudoObjval(), SCIPgetSolOrigObj(), SCIPgetSolTransObj(), SCIPprimalHeuristics(), SCIPsolLinkPseudoSol(), and solveNode().
| SCIP_Real SCIPlpGetModifiedPseudoObjval | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_PROB * | prob, | ||
| SCIP_VAR * | var, | ||
| SCIP_Real | oldbound, | ||
| SCIP_Real | newbound, | ||
| SCIP_BOUNDTYPE | boundtype | ||
| ) |
gets pseudo objective value, if a bound of the given variable would be modified in the given way
| lp | current LP data |
| set | global SCIP settings |
| prob | problem data |
| var | problem variable |
| oldbound | old value for bound |
| newbound | new value for bound |
| boundtype | type of bound: lower or upper bound |
Definition at line 12750 of file lp.c.
References getFinitePseudoObjval(), SCIP_Lp::pseudoobjvalinf, REALABS, SCIP_Real, SCIPsetInfinity(), SCIPsetIsInfinity(), SCIPsetIsZero(), SCIPvarGetBestBoundType(), and SCIPvarGetObj().
Referenced by SCIPnodeAddBoundinfer().
| SCIP_Real SCIPlpGetModifiedProvedPseudoObjval | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var, | ||
| SCIP_Real | oldbound, | ||
| SCIP_Real | newbound, | ||
| SCIP_BOUNDTYPE | boundtype | ||
| ) |
gets pseudo objective value, if a bound of the given variable would be modified in the given way; perform calculations with interval arithmetic to get an exact lower bound
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable |
| oldbound | old value for bound |
| newbound | new value for bound |
| boundtype | type of bound: lower or upper bound |
Definition at line 12790 of file lp.c.
References SCIP_Lp::pseudoobjval, SCIP_Lp::pseudoobjvalid, SCIP_Lp::pseudoobjvalinf, REALABS, SCIP_Real, SCIPintervalAdd(), SCIPintervalGetInf(), SCIPintervalMul(), SCIPintervalSet(), SCIPintervalSub(), SCIPsetInfinity(), SCIPsetIsInfinity(), SCIPsetIsZero(), SCIPvarGetBestBoundType(), and SCIPvarGetObj().
Referenced by SCIPnodeAddBoundinfer().
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static |
compute the objective delta due the new objective coefficient
| set | global SCIP settings |
| oldobj | old objective value of variable |
| newobj | new objective value of variable |
| lb | lower bound of variable |
| ub | upper bound of variable |
| deltaval | pointer to store the delta value |
| deltainf | pointer to store the number of variables with infinite best bound |
Definition at line 12848 of file lp.c.
References REALABS, SCIPsetIsEQ(), SCIPsetIsInfinity(), SCIPsetIsNegative(), and SCIPsetIsPositive().
Referenced by SCIPlpUpdateVarObj().
|
static |
compute the objective delta due the new lower bound
| set | global SCIP settings |
| obj | objective value of variable |
| oldlb | old lower bound of variable |
| newlb | new lower bound of variable |
| deltaval | pointer to store the delta value |
| deltainf | pointer to store the number of variables with infinite best bound |
Definition at line 12980 of file lp.c.
References REALABS, SCIPsetIsInfinity(), and SCIPsetIsPositive().
Referenced by SCIPlpUpdateVarLb(), and SCIPlpUpdateVarLbGlobal().
|
static |
compute the objective delta due the new upper bound
| set | global SCIP settings |
| obj | objective value of variable |
| oldub | old upper bound of variable |
| newub | new upper bound of variable |
| deltaval | pointer to store the delta value |
| deltainf | pointer to store the number of variables with infinite best bound |
Definition at line 13021 of file lp.c.
References REALABS, SCIPsetIsInfinity(), and SCIPsetIsNegative().
Referenced by SCIPlpUpdateVarUb(), and SCIPlpUpdateVarUbGlobal().
|
static |
updates current pseudo and loose objective values for a change in a variable's objective value or bounds
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed |
| deltaval | delta value in the objective function |
| deltainf | delta value for the number of variables with infinite best bound |
| local | should the local pseudo objective value be updated? |
| loose | should the loose objective value be updated? |
| global | should the global pseudo objective value be updated? |
Definition at line 13062 of file lp.c.
References FALSE, SCIP_Lp::glbpseudoobjval, SCIP_Lp::glbpseudoobjvalid, SCIP_Lp::glbpseudoobjvalinf, SCIP_Lp::looseobjval, SCIP_Lp::looseobjvalid, SCIP_Lp::looseobjvalinf, NULL, SCIP_Lp::pseudoobjval, SCIP_Lp::pseudoobjvalid, SCIP_Lp::pseudoobjvalinf, REALABS, SCIP_Lp::relglbpseudoobjval, SCIP_Lp::rellooseobjval, SCIP_Lp::relpseudoobjval, SCIP_VARSTATUS_LOOSE, SCIPsetIsUpdateUnreliable(), SCIPvarGetStatus(), and TRUE.
Referenced by lpUpdateVarColumn(), lpUpdateVarLoose(), SCIPlpUpdateVarLb(), SCIPlpUpdateVarLbGlobal(), SCIPlpUpdateVarObj(), SCIPlpUpdateVarUb(), and SCIPlpUpdateVarUbGlobal().
|
static |
updates current pseudo and loose objective values for a change in a variable's objective value or bounds; pseudo objective value is calculated with interval arithmetics to get a proved lower bound
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed |
| oldobj | old objective value of variable |
| oldlb | old objective value of variable |
| oldub | old objective value of variable |
| newobj | new objective value of variable |
| newlb | new objective value of variable |
| newub | new objective value of variable |
Definition at line 13144 of file lp.c.
References SCIP_Lp::looseobjval, SCIP_Lp::looseobjvalinf, NULL, SCIP_Lp::pseudoobjval, SCIP_Lp::pseudoobjvalinf, REALABS, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIP_VARSTATUS_LOOSE, SCIPerrorMessage, SCIPintervalAdd(), SCIPintervalGetInf(), SCIPintervalMul(), SCIPintervalSet(), SCIPintervalSub(), SCIPsetInfinity(), SCIPsetIsInfinity(), SCIPvarGetProbindex(), and SCIPvarGetStatus().
Referenced by SCIPlpUpdateVarLb(), SCIPlpUpdateVarObj(), and SCIPlpUpdateVarUb().
| SCIP_RETCODE SCIPlpUpdateVarObj | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var, | ||
| SCIP_Real | oldobj, | ||
| SCIP_Real | newobj | ||
| ) |
updates current pseudo and loose objective value for a change in a variable's objective value
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed |
| oldobj | old objective value of variable |
| newobj | new objective value of variable |
Definition at line 13257 of file lp.c.
References FALSE, getObjvalDeltaObj(), lpUpdateObjval(), lpUpdateVarProved(), NULL, SCIP_Lp::probing, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIP_VARSTATUS_LOOSE, SCIPsetIsEQ(), SCIPvarGetLbGlobal(), SCIPvarGetLbLocal(), SCIPvarGetProbindex(), SCIPvarGetStatus(), SCIPvarGetUbGlobal(), SCIPvarGetUbLocal(), and TRUE.
Referenced by SCIPeventProcess(), SCIPlpUpdateAddVar(), and SCIPlpUpdateDelVar().
| SCIP_RETCODE SCIPlpUpdateVarLbGlobal | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var, | ||
| SCIP_Real | oldlb, | ||
| SCIP_Real | newlb | ||
| ) |
updates current root pseudo objective value for a global change in a variable's lower bound
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed |
| oldlb | old lower bound of variable |
| newlb | new lower bound of variable |
Definition at line 13311 of file lp.c.
References FALSE, getObjvalDeltaLb(), lpUpdateObjval(), NULL, SCIP_OKAY, SCIP_Real, SCIPsetIsEQ(), SCIPsetIsPositive(), SCIPvarGetObj(), and TRUE.
Referenced by SCIPeventProcess().
| SCIP_RETCODE SCIPlpUpdateVarLb | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var, | ||
| SCIP_Real | oldlb, | ||
| SCIP_Real | newlb | ||
| ) |
updates current pseudo and loose objective value for a change in a variable's lower bound
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed |
| oldlb | old lower bound of variable |
| newlb | new lower bound of variable |
Definition at line 13339 of file lp.c.
References FALSE, getObjvalDeltaLb(), lpUpdateObjval(), lpUpdateVarProved(), NULL, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIP_VARSTATUS_LOOSE, SCIPsetIsEQ(), SCIPsetIsPositive(), SCIPvarGetObj(), SCIPvarGetProbindex(), SCIPvarGetStatus(), SCIPvarGetUbLocal(), and TRUE.
Referenced by SCIPeventProcess().
| SCIP_RETCODE SCIPlpUpdateVarUbGlobal | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var, | ||
| SCIP_Real | oldub, | ||
| SCIP_Real | newub | ||
| ) |
updates current root pseudo objective value for a global change in a variable's upper bound
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed |
| oldub | old upper bound of variable |
| newub | new upper bound of variable |
Definition at line 13380 of file lp.c.
References FALSE, getObjvalDeltaUb(), lpUpdateObjval(), NULL, SCIP_OKAY, SCIP_Real, SCIPsetIsEQ(), SCIPsetIsNegative(), SCIPvarGetObj(), and TRUE.
Referenced by SCIPeventProcess().
| SCIP_RETCODE SCIPlpUpdateVarUb | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var, | ||
| SCIP_Real | oldub, | ||
| SCIP_Real | newub | ||
| ) |
updates current pseudo objective value for a change in a variable's upper bound
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed |
| oldub | old upper bound of variable |
| newub | new upper bound of variable |
Definition at line 13407 of file lp.c.
References FALSE, getObjvalDeltaUb(), lpUpdateObjval(), lpUpdateVarProved(), NULL, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIP_VARSTATUS_LOOSE, SCIPsetIsEQ(), SCIPsetIsNegative(), SCIPvarGetLbLocal(), SCIPvarGetObj(), SCIPvarGetProbindex(), SCIPvarGetStatus(), and TRUE.
Referenced by SCIPeventProcess().
| SCIP_RETCODE SCIPlpUpdateAddVar | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var | ||
| ) |
informs LP, that given variable was added to the problem
| lp | current LP data |
| set | global SCIP settings |
| var | variable that is now a LOOSE problem variable |
Definition at line 13448 of file lp.c.
References SCIP_Lp::nloosevars, NULL, SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIP_VARSTATUS_LOOSE, SCIPlpUpdateVarObj(), SCIPvarGetObj(), SCIPvarGetProbindex(), and SCIPvarGetStatus().
Referenced by SCIPprobAddVar().
| SCIP_RETCODE SCIPlpUpdateDelVar | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var | ||
| ) |
informs LP, that given variable is to be deleted from the problem
| lp | current LP data |
| set | global SCIP settings |
| var | variable that will be deleted from the problem |
Definition at line 13469 of file lp.c.
References NULL, SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIP_VARSTATUS_LOOSE, SCIPlpDecNLoosevars(), SCIPlpUpdateVarObj(), SCIPvarGetObj(), SCIPvarGetProbindex(), and SCIPvarGetStatus().
Referenced by SCIPprobPerformVarDeletions().
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informs LP, that given formerly loose problem variable is now a column variable
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed from LOOSE to COLUMN |
Definition at line 13493 of file lp.c.
References FALSE, SCIP_Lp::looseobjvalinf, lpUpdateObjval(), SCIP_Lp::nloosevars, NULL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPlpDecNLoosevars(), SCIPsetIsInfinity(), SCIPsetIsNegative(), SCIPsetIsPositive(), SCIPvarGetLbLocal(), SCIPvarGetObj(), SCIPvarGetProbindex(), SCIPvarGetStatus(), SCIPvarGetUbLocal(), and TRUE.
Referenced by SCIPlpUpdateVarColumn().
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static |
informs LP, that given formerly loose problem variable is now a column variable pseudo objective value is calculated with interval arithmetics to get a proved lower bound
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed from LOOSE to COLUMN |
Definition at line 13540 of file lp.c.
References SCIP_Lp::looseobjval, SCIP_Lp::looseobjvalinf, SCIP_Lp::nloosevars, NULL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPintervalGetInf(), SCIPintervalMul(), SCIPintervalSet(), SCIPintervalSub(), SCIPsetInfinity(), SCIPsetIsInfinity(), SCIPsetIsNegative(), SCIPvarGetLbLocal(), SCIPvarGetObj(), SCIPvarGetProbindex(), SCIPvarGetStatus(), and SCIPvarGetUbLocal().
Referenced by SCIPlpUpdateVarColumn().
| SCIP_RETCODE SCIPlpUpdateVarColumn | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var | ||
| ) |
informs LP, that given formerly loose problem variable is now a column variable
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed from LOOSE to COLUMN |
Definition at line 13605 of file lp.c.
References lpUpdateVarColumn(), lpUpdateVarColumnProved(), NULL, SCIP_CALL, and SCIP_OKAY.
Referenced by SCIPvarColumn().
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static |
informs LP, that given formerly column problem variable is now again a loose variable
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed from COLUMN to LOOSE |
Definition at line 13627 of file lp.c.
References FALSE, SCIP_Lp::looseobjvalinf, lpUpdateObjval(), SCIP_Lp::nloosevars, NULL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_LOOSE, SCIPsetIsInfinity(), SCIPsetIsNegative(), SCIPsetIsPositive(), SCIPvarGetLbLocal(), SCIPvarGetObj(), SCIPvarGetProbindex(), SCIPvarGetStatus(), SCIPvarGetUbLocal(), and TRUE.
Referenced by SCIPlpUpdateVarLoose().
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static |
informs LP, that given formerly column problem variable is now again a loose variable pseudo objective value is calculated with interval arithmetics to get a proved lower bound
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed from COLUMN to LOOSE |
Definition at line 13672 of file lp.c.
References SCIP_Lp::looseobjval, SCIP_Lp::looseobjvalinf, SCIP_Lp::nloosevars, NULL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_LOOSE, SCIPintervalAdd(), SCIPintervalGetInf(), SCIPintervalMul(), SCIPintervalSet(), SCIPsetInfinity(), SCIPsetIsInfinity(), SCIPsetIsNegative(), SCIPvarGetLbLocal(), SCIPvarGetObj(), SCIPvarGetProbindex(), SCIPvarGetStatus(), and SCIPvarGetUbLocal().
Referenced by SCIPlpUpdateVarLoose().
| SCIP_RETCODE SCIPlpUpdateVarLoose | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var | ||
| ) |
informs LP, that given formerly column problem variable is now again a loose variable
| lp | current LP data |
| set | global SCIP settings |
| var | problem variable that changed from COLUMN to LOOSE |
Definition at line 13729 of file lp.c.
References lpUpdateVarLoose(), lpUpdateVarLooseProved(), NULL, SCIP_CALL, and SCIP_OKAY.
Referenced by SCIPvarLoose().
| void SCIPlpDecNLoosevars | ( | SCIP_LP * | lp | ) |
decrease the number of loose variables by one
| lp | current LP data |
Definition at line 13750 of file lp.c.
References SCIP_Lp::looseobjval, SCIP_Lp::looseobjvalinf, SCIP_Lp::nloosevars, and NULL.
Referenced by lpUpdateVarColumn(), SCIPlpUpdateDelVar(), SCIPvarFix(), and SCIPvarMultiaggregate().
| SCIP_RETCODE SCIPlpGetSol | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_Bool * | primalfeasible, | ||
| SCIP_Bool * | dualfeasible | ||
| ) |
stores the LP solution in the columns and rows
| lp | current LP data |
| set | global SCIP settings |
| stat | problem statistics |
| primalfeasible | pointer to store whether the solution is primal feasible, or NULL |
| dualfeasible | pointer to store whether the solution is dual feasible, or NULL |
Definition at line 13768 of file lp.c.
References SCIP_Row::activity, SCIP_Col::basisstatus, SCIP_Row::basisstatus, BMSclearMemoryArray, SCIP_Row::constant, SCIP_Row::dualsol, FALSE, SCIP_Lp::flushed, SCIP_Lp::lastlpalgo, SCIP_Col::lb, SCIP_Row::lhs, SCIP_Stat::lpcount, SCIP_Lp::lpi, SCIP_Lp::lpicols, SCIP_Lp::lpirows, SCIP_Lp::lpobjval, MAX, SCIP_Col::maxprimsol, MIN, SCIP_Col::minprimsol, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, NULL, SCIP_Col::obj, SCIP_Col::primsol, SCIP_Col::redcost, SCIP_BASESTAT_BASIC, SCIP_Bool, SCIP_CALL, SCIP_Longint, SCIP_LPALGO_BARRIER, SCIP_OKAY, SCIP_Real, SCIPlpGetSolstat(), SCIPlpiGetBase(), SCIPlpiGetSol(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPsetIsDualfeasNegative(), SCIPsetIsDualfeasPositive(), SCIPsetIsFeasGE(), SCIPsetIsFeasGT(), SCIPsetIsFeasLE(), SCIPsetIsFeasLT(), SCIPsetIsFeasNegative(), SCIPsetIsFeasPositive(), SCIPsetIsInfinity(), SCIPvarGetName(), SCIP_Lp::solisbasic, SCIP_Lp::solved, TRUE, SCIP_Row::validactivitylp, SCIP_Col::validredcostlp, and SCIP_Lp::validsollp.
Referenced by SCIPlpSolveAndEval(), and SCIPlpStartDive().
| SCIP_RETCODE SCIPlpGetUnboundedSol | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_Bool * | primalfeasible, | ||
| SCIP_Bool * | rayfeasible | ||
| ) |
stores LP solution with infinite objective value in the columns and rows
| lp | current LP data |
| set | global SCIP settings |
| stat | problem statistics |
| primalfeasible | pointer to store whether the solution is primal feasible, or NULL |
| rayfeasible | pointer to store whether the primal ray is a feasible unboundedness proof, or NULL |
Definition at line 14062 of file lp.c.
References SCIP_Row::activity, SCIP_Row::constant, SCIP_Row::dualsol, FALSE, SCIP_Lp::flushed, SCIP_Stat::lpcount, SCIP_Lp::lpi, SCIP_Lp::lpicols, SCIP_Lp::lpirows, SCIP_Lp::lpobjval, SCIP_Lp::lpsolstat, MAX, MIN, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, NULL, SCIP_Col::obj, SCIP_Col::primsol, SCIP_Col::redcost, SCIP_CALL, SCIP_INVALID, SCIP_Longint, SCIP_LPERROR, SCIP_LPSOLSTAT_UNBOUNDEDRAY, SCIP_OKAY, SCIP_Real, SCIPerrorMessage, SCIPlpiGetPrimalRay(), SCIPlpiGetSol(), SCIPlpiHasPrimalRay(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPsetInfinity(), SCIPsetIsFeasGE(), SCIPsetIsFeasLE(), SCIPsetIsFeasNegative(), SCIPsetIsFeasPositive(), SCIPsetIsInfinity(), SCIPsetIsNegative(), SCIPsetIsPositive(), SCIPsetIsZero(), SCIP_Lp::solved, TRUE, SCIP_Row::validactivitylp, SCIP_Col::validredcostlp, and SCIP_Lp::validsollp.
Referenced by SCIPlpSolveAndEval(), and SCIPlpStartDive().
| SCIP_RETCODE SCIPlpGetPrimalRay | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_Real * | ray | ||
| ) |
returns primal ray proving the unboundedness of the current LP
| lp | current LP data |
| set | global SCIP settings |
| ray | array for storing primal ray values, they are stored w.r.t. the problem index of the variables, so the size of this array should be at least number of active variables (all entries have to be initialized to 0 before) |
Definition at line 14235 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, SCIP_Lp::lpicols, SCIP_Lp::lpobjval, SCIP_Lp::lpsolstat, SCIP_Lp::nlpicols, NULL, SCIP_CALL, SCIP_LPERROR, SCIP_LPSOLSTAT_UNBOUNDEDRAY, SCIP_OKAY, SCIP_Real, SCIPerrorMessage, SCIPlpiGetPrimalRay(), SCIPlpiHasPrimalRay(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPsetIsInfinity(), SCIPvarGetProbindex(), SCIP_Lp::solved, and SCIP_Col::var.
Referenced by updatePrimalRay().
| SCIP_RETCODE SCIPlpGetDualfarkas | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat | ||
| ) |
stores the dual Farkas multipliers for infeasibility proof in rows
| lp | current LP data |
| set | global SCIP settings |
| stat | problem statistics |
Definition at line 14292 of file lp.c.
References SCIP_Row::activity, SCIP_Row::basisstatus, SCIP_Row::dualfarkas, SCIP_Row::dualsol, SCIP_Lp::flushed, SCIP_Stat::lpcount, SCIP_Lp::lpi, SCIP_Lp::lpicols, SCIP_Lp::lpirows, SCIP_Lp::lpsolstat, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, NULL, SCIP_Col::primsol, SCIP_Col::redcost, SCIP_BASESTAT_BASIC, SCIP_CALL, SCIP_INVALID, SCIP_LPSOLSTAT_INFEASIBLE, SCIP_OKAY, SCIP_Real, SCIPlpiGetDualfarkas(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIP_Lp::solved, SCIP_Row::validactivitylp, SCIP_Col::validfarkaslp, SCIP_Lp::validfarkaslp, and SCIP_Col::validredcostlp.
Referenced by SCIPlpSolveAndEval(), and SCIPlpStartDive().
| SCIP_RETCODE SCIPlpGetIterations | ( | SCIP_LP * | lp, |
| int * | iterations | ||
| ) |
get number of iterations used in last LP solve
| lp | current LP data |
| iterations | pointer to store the iteration count |
Definition at line 14358 of file lp.c.
References SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, and SCIPlpiGetIterations().
Referenced by lpBarrier(), lpDualSimplex(), lpLexDualSimplex(), and lpPrimalSimplex().
| SCIP_RETCODE SCIPlpUpdateAges | ( | SCIP_LP * | lp, |
| SCIP_STAT * | stat | ||
| ) |
increases age of columns with solution value 0.0 and basic rows with activity not at its bounds, resets age of non-zero columns and sharp rows
| lp | current LP data |
| stat | problem statistics |
Definition at line 14373 of file lp.c.
References SCIP_Row::activeinlpcounter, SCIP_Col::age, SCIP_Row::age, SCIP_Lp::cols, SCIP_Lp::flushed, SCIP_Stat::lpcount, SCIP_Lp::lpicols, SCIP_Lp::lpirows, SCIP_Lp::ncols, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, SCIP_Row::nlpsaftercreation, SCIP_Lp::nrows, NULL, SCIP_Lp::rows, SCIP_OKAY, SCIPdebugMessage, SCIP_Lp::solved, and SCIP_Lp::validsollp.
Referenced by SCIPlpSolveAndEval().
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static |
| lp | current LP data |
| set | global SCIP settings |
| coldstat | deletion status of columns: 1 if column should be deleted, 0 if not |
Definition at line 14433 of file lp.c.
References checkLazyColArray(), checkLinks, SCIP_Lp::cols, colUpdateDelLP(), SCIP_Lp::diving, FALSE, SCIP_Lp::flushed, SCIP_Lp::lazycols, SCIP_Col::lpdepth, SCIP_Lp::lpi, SCIP_Lp::lpicols, SCIP_Lp::lpifirstchgcol, SCIP_Col::lpipos, SCIP_Lp::lpobjval, SCIP_Col::lppos, SCIP_Lp::lpsolstat, lpUpdateObjNorms(), markColDeleted(), SCIP_Lp::nchgcols, SCIP_Lp::ncols, SCIP_Lp::nlazycols, SCIP_Lp::nlpicols, SCIP_Lp::nremovablecols, NULL, SCIP_Lp::primalchecked, SCIP_Lp::primalfeasible, SCIP_Col::removable, SCIP_CALL, SCIP_INVALID, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_OKAY, SCIPlpiDelColset(), SCIP_Lp::solved, and SCIP_Col::unchangedobj.
Referenced by lpCleanupCols(), and lpRemoveObsoleteCols().
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static |
| lp | current LP data |
| blkmem | block memory buffers |
| set | global SCIP settings |
| eventqueue | event queue |
| eventfilter | global event filter |
| rowdstat | deletion status of rows: 1 if row should be deleted, 0 if not |
Definition at line 14532 of file lp.c.
References checkLinks, SCIP_Lp::diving, SCIP_Lp::dualchecked, SCIP_Lp::dualfeasible, SCIP_EventFilter::eventmask, FALSE, SCIP_Lp::flushed, SCIP_EventFilter::len, SCIP_Row::lpdepth, SCIP_Lp::lpi, SCIP_Lp::lpifirstchgrow, SCIP_Row::lpipos, SCIP_Lp::lpirows, SCIP_Lp::lpobjval, SCIP_Row::lppos, SCIP_Lp::lpsolstat, markRowDeleted(), SCIP_Lp::nchgrows, SCIP_Lp::nlpirows, SCIP_Lp::nremovablerows, SCIP_Lp::nrows, NULL, SCIP_Row::removable, SCIP_Lp::rows, rowUpdateDelLP(), SCIP_CALL, SCIP_EVENTTYPE_ROWDELETEDLP, SCIP_INVALID, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_OKAY, SCIPeventCreateRowDeletedLP(), SCIPeventqueueAdd(), SCIPlpiDelRowset(), SCIProwRelease(), SCIProwUnlock(), and SCIP_Lp::solved.
Referenced by lpCleanupRows(), lpRemoveObsoleteRows(), and SCIPlpRemoveRedundantRows().
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static |
removes all non-basic columns, that are too old, beginning with the given firstcol
| lp | current LP data |
| set | global SCIP settings |
| stat | problem statistics |
| firstcol | first column to check for clean up |
Definition at line 14630 of file lp.c.
References SCIP_Col::age, SCIP_Col::basisstatus, BMSclearMemoryArray, SCIP_Lp::cols, SCIP_Lp::diving, SCIP_Lp::flushed, lpDelColset(), SCIP_Lp::lpicols, SCIP_Lp::ncols, SCIP_Lp::nlpicols, SCIP_Stat::nnodes, SCIP_Lp::nremovablecols, NULL, SCIP_Col::obsoletenode, SCIP_BASESTAT_BASIC, SCIP_CALL, SCIP_OKAY, SCIPcolGetBestBound(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPsetIsZero(), SCIPvarGetName(), and SCIP_Lp::solisbasic.
Referenced by SCIPlpRemoveAllObsoletes(), and SCIPlpRemoveNewObsoletes().
|
static |
removes all basic rows, that are too old, beginning with the given firstrow
| lp | current LP data |
| blkmem | block memory buffers |
| set | global SCIP settings |
| stat | problem statistics |
| eventqueue | event queue |
| eventfilter | global event filter |
| firstrow | first row to check for clean up |
Definition at line 14706 of file lp.c.
References SCIP_Row::age, SCIP_Row::basisstatus, BMSclearMemoryArray, SCIP_Lp::diving, SCIP_Lp::flushed, lpDelRowset(), SCIP_Lp::lpirows, SCIP_Lp::nlpirows, SCIP_Stat::nnodes, SCIP_Lp::nremovablerows, SCIP_Lp::nrows, NULL, SCIP_Row::obsoletenode, SCIP_Lp::rows, SCIP_BASESTAT_BASIC, SCIP_CALL, SCIP_OKAY, SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, and SCIP_Lp::solisbasic.
Referenced by SCIPlpRemoveAllObsoletes(), and SCIPlpRemoveNewObsoletes().
| SCIP_RETCODE SCIPlpRemoveNewObsoletes | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter | ||
| ) |
removes all non-basic columns and basic rows in the part of the LP created at the current node, that are too old
| lp | current LP data |
| blkmem | block memory buffers |
| set | global SCIP settings |
| stat | problem statistics |
| eventqueue | event queue |
| eventfilter | global event filter |
Definition at line 14782 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::firstnewcol, SCIP_Lp::firstnewrow, lpRemoveObsoleteCols(), lpRemoveObsoleteRows(), SCIP_Lp::ncols, SCIP_Lp::nrows, NULL, SCIP_CALL, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIPlpGetSolstat(), SCIPsetDebugMsg, and SCIP_Lp::solved.
Referenced by SCIPlpSolveAndEval().
| SCIP_RETCODE SCIPlpRemoveAllObsoletes | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter | ||
| ) |
removes all non-basic columns and basic rows in whole LP, that are too old
| lp | current LP data |
| blkmem | block memory buffers |
| set | global SCIP settings |
| stat | problem statistics |
| eventqueue | event queue |
| eventfilter | global event filter |
Definition at line 14813 of file lp.c.
References SCIP_Lp::diving, lpRemoveObsoleteCols(), lpRemoveObsoleteRows(), SCIP_Lp::ncols, SCIP_Lp::nrows, NULL, SCIP_CALL, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIPlpGetSolstat(), SCIPsetDebugMsg, and SCIP_Lp::solved.
Referenced by focusnodeToFork().
|
static |
removes all non-basic columns at 0.0 beginning with the given firstcol
| lp | current LP data |
| set | global SCIP settings |
| stat | problem statistics |
| firstcol | first column to check for clean up |
Definition at line 14844 of file lp.c.
References BMSclearMemoryArray, SCIP_Lp::cols, SCIP_Lp::diving, SCIP_Lp::flushed, SCIP_Stat::lpcount, lpDelColset(), SCIP_Lp::lpicols, SCIP_Lp::ncols, SCIP_Lp::nlpicols, SCIP_Lp::nremovablecols, NULL, SCIP_BASESTAT_BASIC, SCIP_CALL, SCIP_OKAY, SCIPcolGetBestBound(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPsetIsZero(), SCIP_Lp::solisbasic, and SCIP_Lp::validsollp.
Referenced by SCIPlpCleanupAll(), and SCIPlpCleanupNew().
|
static |
removes all basic rows beginning with the given firstrow
| lp | current LP data |
| blkmem | block memory buffers |
| set | global SCIP settings |
| stat | problem statistics |
| eventqueue | event queue |
| eventfilter | global event filter |
| firstrow | first row to check for clean up |
Definition at line 14911 of file lp.c.
References BMSclearMemoryArray, SCIP_Lp::diving, SCIP_Lp::flushed, SCIP_Stat::lpcount, lpDelRowset(), SCIP_Lp::lpirows, SCIP_Lp::ncols, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, SCIP_Lp::nremovablerows, SCIP_Lp::nrows, NULL, SCIP_Lp::rows, SCIP_BASESTAT_BASIC, SCIP_CALL, SCIP_OKAY, SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIP_Lp::solisbasic, and SCIP_Lp::validsollp.
Referenced by SCIPlpCleanupAll(), and SCIPlpCleanupNew().
| SCIP_RETCODE SCIPlpCleanupNew | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter, | ||
| SCIP_Bool | root | ||
| ) |
removes all non-basic columns at 0.0 and basic rows in the part of the LP created at the current node
| lp | current LP data |
| blkmem | block memory buffers |
| set | global SCIP settings |
| stat | problem statistics |
| eventqueue | event queue |
| eventfilter | global event filter |
| root | are we at the root node? |
Definition at line 14982 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::firstnewcol, SCIP_Lp::firstnewrow, SCIP_Lp::lastlpalgo, lpCleanupCols(), lpCleanupRows(), SCIP_Lp::ncols, SCIP_Lp::nrows, NULL, SCIP_Bool, SCIP_CALL, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIPlpGetSolstat(), SCIPsetDebugMsg, SCIP_Lp::solisbasic, and SCIP_Lp::solved.
Referenced by focusnodeToFork().
| SCIP_RETCODE SCIPlpCleanupAll | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter, | ||
| SCIP_Bool | root | ||
| ) |
removes all non-basic columns at 0.0 and basic rows in the whole LP
| lp | current LP data |
| blkmem | block memory buffers |
| set | global SCIP settings |
| stat | problem statistics |
| eventqueue | event queue |
| eventfilter | global event filter |
| root | are we at the root node? |
Definition at line 15021 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::lastlpalgo, lpCleanupCols(), lpCleanupRows(), SCIP_Lp::ncols, SCIP_Lp::nrows, NULL, SCIP_Bool, SCIP_CALL, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OKAY, SCIPlpGetSolstat(), SCIPsetDebugMsg, SCIP_Lp::solisbasic, and SCIP_Lp::solved.
Referenced by focusnodeToFork().
| SCIP_RETCODE SCIPlpRemoveRedundantRows | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter | ||
| ) |
removes all redundant rows that were added at the current node
| lp | current LP data |
| blkmem | block memory buffers |
| set | global SCIP settings |
| stat | problem statistics |
| eventqueue | event queue |
| eventfilter | global event filter |
Definition at line 15060 of file lp.c.
References SCIP_Row::basisstatus, BMSclearMemoryArray, SCIP_Lp::diving, SCIP_Lp::firstnewrow, SCIP_Lp::flushed, SCIP_Stat::lpcount, lpDelRowset(), SCIP_Lp::lpirows, SCIP_Lp::ncols, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, SCIP_Lp::nrows, NULL, SCIP_Lp::rows, SCIP_BASESTAT_BASIC, SCIP_CALL, SCIP_OKAY, SCIProwGetLhs(), SCIProwGetMaxActivity(), SCIProwGetMinActivity(), SCIProwGetName(), SCIProwGetRhs(), SCIProwIsRedundant(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIP_Lp::solisbasic, and SCIP_Lp::validsollp.
Referenced by priceAndCutLoop().
| SCIP_RETCODE SCIPlpStartDive | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat | ||
| ) |
initiates LP diving
| lp | current LP data |
| blkmem | block memory |
| set | global SCIP settings |
| stat | problem statistics |
Definition at line 15134 of file lp.c.
References SCIP_Lp::cols, colStoreSolVals(), SCIP_Lp::divelpistate, SCIP_Lp::divelpwasdualchecked, SCIP_Lp::divelpwasdualfeas, SCIP_Lp::divelpwasprimchecked, SCIP_Lp::divelpwasprimfeas, SCIP_Lp::diving, SCIP_Lp::divinglpiitlim, SCIP_Lp::dualchecked, SCIP_Lp::dualfeasible, FALSE, SCIP_Lp::flushed, SCIP_Col::lb, SCIP_Stat::lpcount, SCIP_Lp::lpi, SCIP_LpSolVals::lpsolstat, SCIP_Lp::lpsolstat, lpStoreSolVals(), SCIP_Lp::ncols, SCIP_Lp::ndivechgsides, SCIP_Lp::ndivingrows, SCIP_Lp::nrows, NULL, SCIP_Col::obj, SCIP_Lp::primalchecked, SCIP_Lp::primalfeasible, SCIP_Lp::probing, SCIP_Lp::rows, rowStoreSolVals(), SCIP_Bool, SCIP_CALL, SCIP_LPPAR_LPITLIM, SCIP_LPSOLSTAT_ERROR, SCIP_LPSOLSTAT_INFEASIBLE, SCIP_LPSOLSTAT_ITERLIMIT, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_LPSOLSTAT_OBJLIMIT, SCIP_LPSOLSTAT_OPTIMAL, SCIP_LPSOLSTAT_TIMELIMIT, SCIP_LPSOLSTAT_UNBOUNDEDRAY, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, SCIPlpGetDualfarkas(), SCIPlpGetSol(), SCIPlpGetSolstat(), SCIPlpGetUnboundedSol(), SCIPlpiGetIntpar(), SCIPlpiGetState(), SCIPsetDebugMsg, SCIPsetIsFeasEQ(), SCIPvarGetCol(), SCIPvarGetLbLocal(), SCIPvarGetObj(), SCIPvarGetStatus(), SCIPvarGetUbLocal(), SCIP_Lp::solved, SCIP_Lp::storedsolvals, TRUE, SCIP_Col::ub, SCIP_Lp::validsollp, and SCIP_Col::var.
Referenced by SCIPstartDive().
| SCIP_RETCODE SCIPlpEndDive | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_MESSAGEHDLR * | messagehdlr, | ||
| SCIP_STAT * | stat, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter, | ||
| SCIP_PROB * | prob, | ||
| SCIP_VAR ** | vars, | ||
| int | nvars | ||
| ) |
quits LP diving and resets bounds and objective values of columns to the current node's values
| lp | current LP data |
| blkmem | block memory |
| set | global SCIP settings |
| messagehdlr | message handler |
| stat | problem statistics |
| eventqueue | event queue |
| eventfilter | global event filter |
| prob | problem data |
| vars | array with all active variables |
| nvars | number of active variables |
Definition at line 15237 of file lp.c.
References colRestoreSolVals(), SCIP_Lp::cols, SCIP_Lp::divechgrows, SCIP_Lp::divechgsides, SCIP_Lp::divechgsidetypes, SCIP_Lp::divelpistate, SCIP_Lp::divelpwasdualchecked, SCIP_Lp::divelpwasdualfeas, SCIP_Lp::divelpwasprimchecked, SCIP_Lp::divelpwasprimfeas, SCIP_Lp::diving, SCIP_Lp::divinglazyapplied, SCIP_Lp::divinglpiitlim, SCIP_Lp::divingobjchg, FALSE, SCIP_Lp::flushed, SCIP_Col::lb, SCIP_Stat::lpcount, SCIP_LpSolVals::lpissolved, lpNumericalTroubleMessage(), lpRestoreSolVals(), lpSetIterationLimit(), SCIP_LpSolVals::lpsolstat, SCIP_Lp::ncols, SCIP_Lp::ndivechgsides, SCIP_Lp::ndivingrows, SCIP_Lp::nlazycols, SCIP_Lp::nrows, NULL, SCIP_Col::obj, SCIP_Lp::resolvelperror, rowRestoreSolVals(), SCIP_Lp::rows, SCIP_Bool, SCIP_CALL, SCIP_LPSOLSTAT_INFEASIBLE, SCIP_LPSOLSTAT_ITERLIMIT, SCIP_LPSOLSTAT_OBJLIMIT, SCIP_LPSOLSTAT_OPTIMAL, SCIP_LPSOLSTAT_TIMELIMIT, SCIP_LPSOLSTAT_UNBOUNDEDRAY, SCIP_OKAY, SCIP_Real, SCIP_SIDETYPE_LEFT, SCIP_VARSTATUS_COLUMN, SCIP_VERBLEVEL_FULL, SCIPcolChgLb(), SCIPcolChgObj(), SCIPcolChgUb(), SCIPlpFlush(), SCIPlpFreeState(), SCIPlpGetSolstat(), SCIPlpSetState(), SCIPlpShrinkRows(), SCIPlpSolveAndEval(), SCIPmessagePrintVerbInfo(), SCIProwChgLhs(), SCIProwChgRhs(), SCIPsetDebugMsg, SCIPsetIsEQ(), SCIPstatIncrement, SCIPvarGetCol(), SCIPvarGetLbLocal(), SCIPvarGetObj(), SCIPvarGetStatus(), SCIPvarGetUbLocal(), SCIP_Lp::storedsolvals, TRUE, SCIP_Col::ub, updateLazyBounds(), and SCIP_Col::var.
Referenced by SCIPendDive().
| SCIP_RETCODE SCIPlpRecordOldRowSideDive | ( | SCIP_LP * | lp, |
| SCIP_ROW * | row, | ||
| SCIP_SIDETYPE | sidetype | ||
| ) |
records a current row side such that any change will be undone after diving
| lp | LP data object |
| row | row affected by the change |
| sidetype | side type |
Definition at line 15419 of file lp.c.
References SCIP_Lp::divechgrows, SCIP_Lp::divechgsides, SCIP_Lp::divechgsidessize, SCIP_Lp::divechgsidetypes, DIVESTACKGROWFACT, SCIP_Row::lhs, SCIP_Lp::ndivechgsides, NULL, reallocDiveChgSideArrays(), SCIP_Row::rhs, SCIP_CALL, SCIP_OKAY, and SCIP_SIDETYPE_LEFT.
Referenced by SCIPchgRowLhsDive(), and SCIPchgRowRhsDive().
| SCIP_RETCODE SCIPlpStartProbing | ( | SCIP_LP * | lp | ) |
informs the LP that probing mode was initiated
| lp | current LP data |
Definition at line 15443 of file lp.c.
References NULL, SCIP_Lp::probing, SCIP_OKAY, SCIP_Lp::strongbranching, SCIP_Lp::strongbranchprobing, and TRUE.
Referenced by SCIPtreeStartProbing().
| SCIP_RETCODE SCIPlpEndProbing | ( | SCIP_LP * | lp | ) |
informs the LP that probing mode was finished
| lp | current LP data |
Definition at line 15458 of file lp.c.
References FALSE, NULL, SCIP_Lp::probing, SCIP_OKAY, SCIP_Lp::strongbranching, and SCIP_Lp::strongbranchprobing.
Referenced by SCIPtreeEndProbing().
| void SCIPlpStartStrongbranchProbing | ( | SCIP_LP * | lp | ) |
informs the LP that the probing mode is now used for strongbranching
| lp | current LP data |
Definition at line 15473 of file lp.c.
References NULL, SCIP_Lp::probing, SCIP_Lp::strongbranching, SCIP_Lp::strongbranchprobing, and TRUE.
Referenced by SCIPstartStrongbranch().
| void SCIPlpEndStrongbranchProbing | ( | SCIP_LP * | lp | ) |
informs the LP that the probing mode is not used for strongbranching anymore
| lp | current LP data |
Definition at line 15486 of file lp.c.
References FALSE, NULL, SCIP_Lp::probing, SCIP_Lp::strongbranching, and SCIP_Lp::strongbranchprobing.
Referenced by SCIPendStrongbranch().
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static |
calculates y*b + min{(c - y*A)*x | lb <= x <= ub} for given vectors y and c; the vector b is defined with b[i] = lhs[i] if y[i] >= 0, b[i] = rhs[i] if y[i] < 0 Calculating this value in interval arithmetics gives a proved lower LP bound for the following reason (assuming, we have only left hand sides): min{cx | b <= Ax, lb <= x <= ub} >= min{cx | yb <= yAx, lb <= x <= ub} (restriction in minimum is relaxed) == yb + min{cx - yb | yb <= yAx, lb <= x <= ub} (added yb - yb == 0) >= yb + min{cx - yAx | yb <= yAx, lb <= x <= ub} (because yAx >= yb inside minimum) >= yb + min{cx - yAx | lb <= x <= ub} (restriction in minimum is relaxed)
| lp | current LP data |
| set | global SCIP settings |
| usefarkas | use y = dual Farkas and c = 0 instead of y = dual solution and c = obj? |
| bound | result of interval arithmetic minimization |
Definition at line 15509 of file lp.c.
References SCIP_Lp::cols, SCIP_Row::constant, SCIP_Row::dualfarkas, SCIP_Row::dualsol, SCIP_Col::lb, SCIP_Row::lhs, SCIP_Col::linkpos, SCIP_Row::lppos, SCIP_Lp::ncols, SCIP_Col::nlprows, SCIP_Lp::nrows, NULL, SCIP_Col::nunlinked, SCIP_Col::obj, SCIP_Row::rhs, SCIP_Col::rows, SCIP_Lp::rows, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPcolGetLb(), SCIPcolGetUb(), SCIPintervalAdd(), SCIPintervalGetInf(), SCIPintervalMul(), SCIPintervalSet(), SCIPintervalSetBounds(), SCIPintervalSub(), SCIPsetAllocBufferArray, SCIPsetFreeBufferArray, SCIPsetInfinity(), SCIPsetIsFeasNegative(), SCIPsetIsFeasPositive(), SCIP_Lp::solved, SCIP_Col::ub, and SCIP_Col::vals.
Referenced by SCIPlpGetProvedLowerbound(), and SCIPlpIsInfeasibilityProved().
| SCIP_RETCODE SCIPlpGetProvedLowerbound | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_Real * | bound | ||
| ) |
gets proven lower (dual) bound of last LP solution
| lp | current LP data |
| set | global SCIP settings |
| bound | pointer to store proven dual bound |
Definition at line 15619 of file lp.c.
References FALSE, provedBound(), SCIP_CALL, SCIP_OKAY, and SCIPsetDebugMsg.
Referenced by SCIPnodeUpdateLowerboundLP(), and solveNodeInitialLP().
| SCIP_RETCODE SCIPlpIsInfeasibilityProved | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_Bool * | proved | ||
| ) |
gets proven dual bound of last LP solution
| lp | current LP data |
| set | global SCIP settings |
| proved | pointer to store whether infeasibility is proven |
Definition at line 15633 of file lp.c.
References bound, NULL, provedBound(), SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPsetDebugMsg, and TRUE.
| SCIP_RETCODE SCIPlpWrite | ( | SCIP_LP * | lp, |
| const char * | fname | ||
| ) |
writes LP to a file
| lp | current LP data |
| fname | file name |
Definition at line 15655 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, and SCIPlpiWriteLP().
Referenced by lpBarrier(), lpDualSimplex(), lpPrimalSimplex(), and SCIPwriteLP().
| SCIP_RETCODE SCIPlpWriteMip | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_MESSAGEHDLR * | messagehdlr, | ||
| const char * | fname, | ||
| SCIP_Bool | genericnames, | ||
| SCIP_Bool | origobj, | ||
| SCIP_OBJSENSE | objsense, | ||
| SCIP_Real | objscale, | ||
| SCIP_Real | objoffset, | ||
| SCIP_Bool | lazyconss | ||
| ) |
writes MIP relaxation of the current B&B node to a file
| lp | current LP data |
| set | global SCIP settings |
| messagehdlr | message handler |
| fname | file name |
| genericnames | should generic names like x_i and row_j be used in order to avoid troubles with reserved symbols? |
| origobj | should the original objective function be used? |
| objsense | objective sense |
| objscale | objective scaling factor |
| objoffset | objective offset, e.g., caused by variable fixings in presolving |
| lazyconss | output removable rows as lazy constraints? |
Definition at line 15670 of file lp.c.
References SCIP_Row::cols, SCIP_Lp::cols, SCIP_Row::constant, SCIP_Lp::flushed, SCIP_Col::lb, SCIP_Row::lhs, SCIP_Col::lppos, SCIP_Row::lppos, SCIP_Row::name, SCIP_Var::name, SCIP_Lp::ncols, SCIP_Row::nlpcols, SCIP_Lp::nrows, NULL, SCIP_Col::obj, REALABS, SCIP_Row::rhs, SCIP_Lp::rows, SCIP_ERROR, SCIP_FILECREATEERROR, SCIP_MAXSTRLEN, SCIP_OBJSENSE_MINIMIZE, SCIP_OKAY, SCIP_Real, SCIPerrorMessage, SCIPmessageFPrintInfo(), SCIPmessagePrintWarning(), SCIPprintSysError(), SCIProwIsRemovable(), SCIPsetDebugMsg, SCIPsetIsEQ(), SCIPsetIsInfinity(), SCIPsnprintf(), SCIPvarIsIntegral(), SCIP_Col::ub, SCIP_Row::vals, and SCIP_Col::var.
Referenced by SCIPwriteMIP().
gets array with columns of the LP
| lp | current LP data |
Definition at line 16644 of file lp.c.
References SCIP_Lp::cols, and NULL.
Referenced by branchcandCalcLPCands(), forkFree(), SCIPcomputeLPRelIntPoint(), SCIPgetLPCols(), SCIPgetLPColsData(), and SCIPsolLinkLPSol().
| int SCIPlpGetNCols | ( | SCIP_LP * | lp | ) |
gets current number of columns in LP
| lp | current LP data |
Definition at line 16654 of file lp.c.
References SCIP_Lp::ncols, and NULL.
Referenced by branchcandCalcLPCands(), focusnodeCleanupVars(), focusnodeToFork(), forkFree(), initLP(), probingnodeCreate(), probingnodeUpdate(), runBoundHeuristic(), SCIPcomputeLPRelIntPoint(), SCIPgetLPColsData(), SCIPgetNLPCols(), SCIPnodeFocus(), SCIPpricestoreAddProbVars(), SCIPpricestoreApplyVars(), SCIPprobAllColsInLP(), SCIPsolLinkLPSol(), SCIPtreeLoadLP(), treeBacktrackProbing(), and undoBdchgsDualsol().
gets array with rows of the LP
| lp | current LP data |
Definition at line 16664 of file lp.c.
References NULL, and SCIP_Lp::rows.
Referenced by forkFree(), getFarkasProof(), runBoundHeuristic(), SCIPgetLPRows(), SCIPgetLPRowsData(), storeCuts(), and undoBdchgsDualsol().
| int SCIPlpGetNRows | ( | SCIP_LP * | lp | ) |
gets current number of rows in LP
| lp | current LP data |
Definition at line 16674 of file lp.c.
References SCIP_Lp::nrows, and NULL.
Referenced by focusnodeToFork(), forkFree(), getFarkasProof(), initLP(), probingnodeCreate(), probingnodeUpdate(), runBoundHeuristic(), SCIPgetLPRowsData(), SCIPgetNLPRows(), SCIPnodeFocus(), SCIPtreeLoadLP(), storeCuts(), treeBacktrackProbing(), and undoBdchgsDualsol().
gets array with newly added columns after the last mark
| lp | current LP data |
Definition at line 16684 of file lp.c.
References SCIP_Lp::cols, SCIP_Lp::firstnewcol, SCIP_Lp::ncols, and NULL.
Referenced by forkCreate(), and pseudoforkCreate().
| int SCIPlpGetNNewcols | ( | SCIP_LP * | lp | ) |
gets number of newly added columns after the last mark
| lp | current LP data |
Definition at line 16695 of file lp.c.
References SCIP_Lp::firstnewcol, SCIP_Lp::ncols, and NULL.
Referenced by focusnodeCleanupVars(), focusnodeToFork(), focusnodeToJunction(), forkCreate(), pseudoforkCreate(), and SCIPnodeFocus().
gets array with newly added rows after the last mark
| lp | current LP data |
Definition at line 16706 of file lp.c.
References SCIP_Lp::firstnewrow, SCIP_Lp::nrows, NULL, and SCIP_Lp::rows.
Referenced by forkCreate(), and pseudoforkCreate().
| int SCIPlpGetNNewrows | ( | SCIP_LP * | lp | ) |
gets number of newly added rows after the last mark
| lp | current LP data |
Definition at line 16717 of file lp.c.
References SCIP_Lp::firstnewrow, SCIP_Lp::nrows, and NULL.
Referenced by focusnodeToFork(), forkCreate(), pseudoforkCreate(), and SCIPnodeFocus().
recalculates Euclidean norm of objective function vector of column variables if it have gotten unreliable during calculation
| set | global SCIP settings |
| lp | LP data |
Definition at line 16728 of file lp.c.
References SCIP_Lp::cols, FALSE, MAX, SCIP_Lp::ncols, NULL, SCIP_Lp::objsqrnorm, SCIP_Lp::objsqrnormunreliable, and SCIPsetIsGE().
Referenced by SCIPgetObjNorm(), and SCIProwGetObjParallelism().
gets Euclidean norm of objective function vector of column variables, only use this method if lp->objsqrnormunreliable == FALSE, so probably you have to call SCIPlpRecalculateObjSqrNorm before
| lp | LP data |
Definition at line 16759 of file lp.c.
References NULL, SCIP_Lp::objsqrnorm, and SCIP_Lp::objsqrnormunreliable.
Referenced by SCIPgetObjNorm().
sets whether the root lp is a relaxation of the problem and its optimal objective value is a global lower bound
| lp | LP data |
| isrelax | is the root lp a relaxation of the problem? |
Definition at line 16771 of file lp.c.
References NULL, and SCIP_Lp::rootlpisrelax.
Referenced by SCIPprobStoreRootSol().
returns whether the root lp is a relaxation of the problem and its optimal objective value is a global lower bound
| lp | LP data |
Definition at line 16782 of file lp.c.
References NULL, and SCIP_Lp::rootlpisrelax.
Referenced by SCIPisRootLPRelax().
gets the objective value of the root node LP; returns SCIP_INVALID if the root node LP was not (yet) solved
| lp | LP data |
Definition at line 16792 of file lp.c.
References MIN, NULL, SCIP_Lp::rootlooseobjval, SCIP_Lp::rootlpobjval, and SCIP_INVALID.
Referenced by SCIPgetLPRootObjval().
gets part of the objective value of the root node LP that results from COLUMN variables only; returns SCIP_INVALID if the root node LP was not (yet) solved
| lp | LP data |
Definition at line 16804 of file lp.c.
References NULL, and SCIP_Lp::rootlpobjval.
Referenced by SCIPgetLPRootColumnObjval().
gets part of the objective value of the root node LP that results from LOOSE variables only; returns SCIP_INVALID if the root node LP was not (yet) solved
| lp | LP data |
Definition at line 16816 of file lp.c.
References NULL, and SCIP_Lp::rootlooseobjval.
Referenced by SCIPgetLPRootLooseObjval().
gets the LP solver interface
| lp | current LP data |
Definition at line 16826 of file lp.c.
References SCIP_Lp::lpi, and NULL.
Referenced by conflictAnalyzeLP(), SCIPconflictAnalyzeLP(), SCIPgetLPI(), SCIPlpSolveAndEval(), SCIPprintLPSolutionQuality(), solveNodeLP(), undoBdchgsDualfarkas(), and undoBdchgsDualsol().
sets whether the current LP is a relaxation of the current problem and its optimal objective value is a local lower bound
| lp | LP data |
| relax | is the current lp a relaxation? |
Definition at line 16836 of file lp.c.
References SCIP_Lp::isrelax, and NULL.
Referenced by SCIPpriceLoop(), SCIPtreeEndProbing(), and solveProbingLP().
returns whether the current LP is a relaxation of the problem for which it has been solved and its solution value a valid local lower bound?
| lp | LP data |
Definition at line 16849 of file lp.c.
References SCIP_Lp::isrelax, and NULL.
Referenced by priceAndCutLoop(), propAndSolve(), SCIPendDive(), SCIPisLPRelax(), SCIPprobStoreRootSol(), SCIPtreeEndProbing(), solveNodeInitialLP(), and updateEstimate().
returns whether the current LP is flushed and solved
| lp | current LP data |
Definition at line 16859 of file lp.c.
References SCIP_Lp::flushed, NULL, and SCIP_Lp::solved.
Referenced by priceAndCutLoop(), SCIPendDive(), SCIPlinkLPSol(), SCIPsolCreateLPSol(), and SCIPsolLinkCurrentSol().
return whether the current LP solution passed the primal feasibility check
| lp | current LP data |
Definition at line 16869 of file lp.c.
References NULL, SCIP_Lp::primalchecked, and SCIP_Lp::primalfeasible.
Referenced by SCIPisLPPrimalReliable().
return whether the current LP solution passed the dual feasibility check
| lp | current LP data |
Definition at line 16879 of file lp.c.
References SCIP_Lp::dualchecked, SCIP_Lp::dualfeasible, and NULL.
Referenced by analyzeStrongbranch(), getImplVarRedcost(), SCIPgetVarImplRedcost(), SCIPgetVarRedcost(), SCIPisLPDualReliable(), SCIPprobUpdateBestRootSol(), and SCIPvarGetImplRedcost().
returns whether the current LP solution is a basic solution
| lp | current LP data |
Definition at line 16889 of file lp.c.
References NULL, and SCIP_Lp::solisbasic.
Referenced by getImplVarRedcost(), SCIPgetLPBasisInd(), SCIPgetLPBInvACol(), SCIPgetLPBInvARow(), SCIPgetLPBInvCol(), SCIPgetLPBInvRow(), SCIPisLPSolBasic(), SCIPprobUpdateBestRootSol(), and SCIPvarGetImplRedcost().
returns whether the LP is in diving mode
| lp | current LP data |
Definition at line 16899 of file lp.c.
References SCIP_Lp::diving, and NULL.
Referenced by computeLPBounds(), conflictAnalyzeBoundexceedingLP(), conflictAnalyzeInfeasibleLP(), SCIPaddRowDive(), SCIPchgCutoffboundDive(), SCIPchgRowLhs(), SCIPchgRowLhsDive(), SCIPchgRowRhs(), SCIPchgRowRhsDive(), SCIPchgVarLbDive(), SCIPchgVarObjDive(), SCIPchgVarUbDive(), SCIPendDive(), SCIPgetVarLbDive(), SCIPgetVarObjDive(), SCIPgetVarUbDive(), SCIPinDive(), SCIPprimalHeuristics(), SCIPsolLinkLPSol(), SCIPsolveDiveLP(), SCIPstartDive(), SCIPstartProbing(), SCIPstartStrongbranch(), SCIPtreeCutoff(), SCIPvarChgLbDive(), and SCIPvarChgUbDive().
returns whether the LP is in diving mode and the objective value of at least one column was changed
| lp | current LP data |
Definition at line 16909 of file lp.c.
References SCIP_Lp::divingobjchg, and NULL.
Referenced by conflictAnalyzeBoundexceedingLP(), conflictAnalyzeInfeasibleLP(), conflictAnalyzeLP(), getFarkasProof(), runBoundHeuristic(), SCIPchgVarObjProbing(), SCIPlpSetCutoffbound(), SCIPsolLinkLPSol(), SCIPsolveDiveLP(), and SCIPtreeEndProbing().
| void SCIPlpMarkDivingObjChanged | ( | SCIP_LP * | lp | ) |
marks the diving LP to have a changed objective function
| lp | current LP data |
Definition at line 16919 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::divingobjchg, NULL, SCIP_Lp::probing, and TRUE.
Referenced by SCIPchgVarObjDive(), SCIPchgVarObjProbing(), and SCIPpropagateProbing().
| void SCIPlpUnmarkDivingObjChanged | ( | SCIP_LP * | lp | ) |
marks the diving LP to not have a changed objective function anymore
| lp | current LP data |
Definition at line 16930 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::divingobjchg, FALSE, NULL, and SCIP_Lp::probing.
Referenced by SCIPpropagateProbing(), and treeBacktrackProbing().
| lp | current LP data |
Definition at line 16941 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::ndivechgsides, and NULL.
Referenced by SCIPsolveDiveLP().
| SCIP_RETCODE SCIPlpComputeRelIntPoint | ( | SCIP_SET * | set, |
| SCIP_MESSAGEHDLR * | messagehdlr, | ||
| SCIP_LP * | lp, | ||
| SCIP_PROB * | prob, | ||
| SCIP_Bool | relaxrows, | ||
| SCIP_Bool | inclobjcutoff, | ||
| SCIP_Real | timelimit, | ||
| int | iterlimit, | ||
| SCIP_Real * | point, | ||
| SCIP_Bool * | success | ||
| ) |
compute relative interior point
We use the approach of
to compute a relative interior point for the current LP.
Assume the original LP looks as follows:
\[ \begin{array}{rrl} \min & c^T x &\\ & A x & \geq a\\ & B x & \leq b\\ & D x & = d. \end{array} \]
Note that bounds should be included in the system.
To find an interior point the following LP does the job:
\[ \begin{array}{rrl} \max & 1^T y &\\ & A x - y - \alpha a & \geq 0\\ & B x + y - \alpha b & \leq 0\\ & D x - \alpha d & = 0\\ & 0 \leq y & \leq 1\\ & \alpha & \geq 1. \end{array} \]
If the original LP is feasible, this LP is feasible as well. Any optimal solution yields the relative interior point \(x^*_j/\alpha^*\). Note that this will just produce some relative interior point. It does not produce a particular relative interior point, e.g., one that maximizes the distance to the boundary in some norm.
| set | global SCIP settings |
| messagehdlr | message handler |
| lp | LP data |
| prob | problem data |
| relaxrows | should the rows be relaxed |
| inclobjcutoff | should a row for the objective cutoff be included |
| timelimit | time limit for LP solver |
| iterlimit | iteration limit for LP solver |
| point | array to store relative interior point on exit |
| success | buffer to indicate whether interior point was successfully computed |
Definition at line 16986 of file lp.c.
References BMSclearMemoryArray, SCIP_Row::cols, SCIP_Lp::cols, SCIP_Row::constant, SCIP_Lp::cutoffbound, FALSE, getFiniteLooseObjval(), SCIP_Col::lb, SCIP_Row::lhs, SCIP_Lp::looseobjval, SCIP_Lp::looseobjvalinf, SCIP_Row::lpcolssorted, SCIP_Col::lppos, MAX, SCIP_Lp::ncols, SCIP_Row::nlpcols, SCIP_Lp::nrows, NULL, SCIP_Col::obj, REALABS, SCIP_Row::rhs, SCIP_Lp::rows, rowSortLP(), SCIP_CALL, SCIP_INVALID, SCIP_LPPAR_DUALFEASTOL, SCIP_LPPAR_FEASTOL, SCIP_LPPAR_LPITLIM, SCIP_LPPAR_LPTILIM, SCIP_OBJSEN_MAXIMIZE, SCIP_OKAY, SCIP_PARAMETERUNKNOWN, SCIP_Real, SCIPlpiAddCols(), SCIPlpiAddRows(), SCIPlpiCreate(), SCIPlpiFree(), SCIPlpiGetNCols(), SCIPlpiGetSol(), SCIPlpiInfinity(), SCIPlpiIsIterlimExc(), SCIPlpiIsOptimal(), SCIPlpiIsTimelimExc(), SCIPlpiSetIntpar(), SCIPlpiSetRealpar(), SCIPlpiSolveDual(), SCIPlpiWriteLP(), SCIPmessagePrintWarning(), SCIProwIsModifiable(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetDualfeastol(), SCIPsetFreeBufferArray, SCIPsetIsEQ(), SCIPsetIsFeasEQ(), SCIPsetIsFeasGE(), SCIPsetIsFeasGT(), SCIPsetIsFeasLT(), SCIPsetIsFeasZero(), SCIPsetIsInfinity(), SCIPsetLpfeastol(), TRUE, SCIP_Col::ub, and SCIP_Row::vals.
Referenced by SCIPcomputeLPRelIntPoint().
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static |
additional scalars that are tried in integrality scaling
Definition at line 5573 of file lp.c.
Referenced by disaggregate(), multiAggregateBinvar(), presolveAddKKTAggregatedVars(), SCIP_DECL_PRESOLEXEC(), SCIPconflictAddBound(), SCIPsolGetRayVal(), SCIPsolGetVal(), SCIPvarMultiaggregate(), tightenVarsBoundsSOS1(), and writeExpandedSolutions().
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static |
Definition at line 5574 of file lp.c.
Referenced by SCIProwCalcIntegralScalar().