SCIP
Solving Constraint Integer Programs
lp.h File Reference
Detailed Description
internal methods for LP management
Definition in file lp.h.
#include <stdio.h>#include "scip/def.h"#include "blockmemshell/memory.h"#include "scip/type_set.h"#include "scip/type_stat.h"#include "scip/type_misc.h"#include "scip/type_lp.h"#include "scip/type_var.h"#include "scip/type_prob.h"#include "scip/type_sol.h"#include "scip/pub_lp.h"#include "scip/struct_lp.h"Go to the source code of this file.
Function Documentation
◆ SCIPcolCreate()
| 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
- Parameters
-
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 3216 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().
◆ SCIPcolFree()
| SCIP_RETCODE SCIPcolFree | ( | SCIP_COL ** | col, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp | ||
| ) |
frees an LP column
- Parameters
-
col pointer to LP column blkmem block memory set global SCIP settings eventqueue event queue lp current LP data
Definition at line 3314 of file lp.c.
References BMSfreeBlockMemory, BMSfreeBlockMemoryArrayNull, BMSfreeBlockMemoryNull, colUnlink(), NULL, SCIP_CALL, SCIP_OKAY, SCIP_VARSTATUS_COLUMN, and SCIPvarGetStatus().
Referenced by SCIPvarLoose(), and varFree().
◆ SCIPcolPrint()
| void SCIPcolPrint | ( | SCIP_COL * | col, |
| SCIP_MESSAGEHDLR * | messagehdlr, | ||
| FILE * | file | ||
| ) |
output column to file stream
- Parameters
-
col LP column messagehdlr message handler file output file (or NULL for standard output)
Definition at line 3344 of file lp.c.
References SCIP_Col::lb, SCIP_Col::len, SCIP_Row::name, NULL, SCIP_Col::obj, r, SCIP_Col::rows, SCIPmessageFPrintInfo(), SCIP_Col::ub, SCIP_Col::vals, and SCIP_Col::var.
◆ SCIPcolAddCoef()
| 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
- Parameters
-
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 3384 of file lp.c.
References checkLinks, colAddCoef(), SCIP_Lp::diving, NULL, SCIP_CALL, and SCIP_OKAY.
◆ SCIPcolDelCoef()
| SCIP_RETCODE SCIPcolDelCoef | ( | SCIP_COL * | col, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_LP * | lp, | ||
| SCIP_ROW * | row | ||
| ) |
deletes coefficient from column
deletes existing coefficient from column
- Parameters
-
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 3405 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.
◆ SCIPcolChgCoef()
| 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
- Parameters
-
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 3450 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.
◆ SCIPcolIncCoef()
| 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 nonexisting coefficient in an LP column
increases value of an existing or non-existing coefficient in an LP column
- Parameters
-
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 3501 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.
◆ SCIPcolChgObj()
| SCIP_RETCODE SCIPcolChgObj | ( | SCIP_COL * | col, |
| SCIP_SET * | set, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | newobj | ||
| ) |
changes objective value of column
- Parameters
-
col LP column to change set global SCIP settings lp current LP data newobj new objective value
Definition at line 3635 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().
◆ SCIPcolChgLb()
| SCIP_RETCODE SCIPcolChgLb | ( | SCIP_COL * | col, |
| SCIP_SET * | set, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | newlb | ||
| ) |
changes lower bound of column
- Parameters
-
col LP column to change set global SCIP settings lp current LP data newlb new lower bound value
Definition at line 3694 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().
◆ SCIPcolChgUb()
| SCIP_RETCODE SCIPcolChgUb | ( | SCIP_COL * | col, |
| SCIP_SET * | set, | ||
| SCIP_LP * | lp, | ||
| SCIP_Real | newub | ||
| ) |
changes upper bound of column
- Parameters
-
col LP column to change set global SCIP settings lp current LP data newub new upper bound value
Definition at line 3739 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().
◆ SCIPcolCalcRedcost()
calculates the reduced costs of a column using the given dual solution vector
- Parameters
-
col LP column dualsol dual solution vector for current LP rows
Definition at line 3784 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.
◆ SCIPcolGetRedcost()
gets the reduced costs of a column in last LP or after recalculation
- Parameters
-
col LP column stat problem statistics lp current LP data
Definition at line 3889 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().
◆ SCIPcolGetFeasibility()
gets the feasibility of (the dual row of) a column in last LP or after recalculation
- Parameters
-
col LP column set global SCIP settings stat problem statistics lp current LP data
Definition at line 3913 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().
◆ SCIPcolCalcFarkasCoef()
calculates the Farkas coefficient y^T A_i of a column i using the given dual Farkas vector y
- Parameters
-
col LP column dualfarkas dense dual Farkas vector for current LP rows
Definition at line 3967 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.
◆ SCIPcolGetFarkasCoef()
gets the Farkas coefficient y^T A_i of a column i in last LP (which must be infeasible)
gets the Farkas coefficient of a column in last LP (which must be infeasible)
- Parameters
-
col LP column stat problem statistics lp current LP data
Definition at line 4072 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().
◆ SCIPcolGetFarkasValue()
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}
- Parameters
-
col LP column stat problem statistics lp current LP data
Definition at line 4098 of file lp.c.
References SCIP_Col::lb, NULL, SCIP_Real, SCIPcolGetFarkasCoef(), and SCIP_Col::ub.
Referenced by SCIPpricestoreAddProbVars().
◆ SCIPlpStartStrongbranch()
| SCIP_RETCODE SCIPlpStartStrongbranch | ( | SCIP_LP * | lp | ) |
start strong branching - call before any strong branching
- Parameters
-
lp LP data
Definition at line 4117 of file lp.c.
References SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPlpiStartStrongbranch(), SCIP_Lp::strongbranching, and TRUE.
Referenced by SCIPstartStrongbranch().
◆ SCIPlpEndStrongbranch()
| SCIP_RETCODE SCIPlpEndStrongbranch | ( | SCIP_LP * | lp | ) |
end strong branching - call after any strong branching
- Parameters
-
lp LP data
Definition at line 4132 of file lp.c.
References FALSE, SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPlpiEndStrongbranch(), and SCIP_Lp::strongbranching.
Referenced by SCIPendStrongbranch().
◆ SCIPcolSetStrongbranchData()
| 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
- Parameters
-
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 4147 of file lp.c.
References SCIP_Lp::cols, SCIP_Lp::cutoffbound, SCIP_Col::lpipos, SCIP_Col::lppos, MIN, SCIP_Lp::ncols, SCIP_Stat::nlps, SCIP_Stat::nnodes, SCIP_Col::nsbcalls, 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(), and SCIPsetVarStrongbranchData().
◆ SCIPcolInvalidateStrongbranchData()
| void SCIPcolInvalidateStrongbranchData | ( | SCIP_COL * | col, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_LP * | lp | ||
| ) |
invalidates strong branching information for a column variable
- Parameters
-
col LP column set global SCIP settings stat dynamic problem statistics lp LP data
Definition at line 4201 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().
◆ SCIPcolGetStrongbranch()
| 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
- Parameters
-
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 4236 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::nlps, SCIP_Stat::nnodes, SCIP_Stat::nprimallpiterations, SCIP_Stat::nprimallps, SCIP_Stat::nprimalresolvelpiterations, SCIP_Stat::nprimalresolvelps, SCIP_Col::nsbcalls, 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().
◆ SCIPcolGetStrongbranches()
| 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
- Parameters
-
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 4394 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::nlps, SCIP_Stat::nnodes, SCIP_Stat::nprimallpiterations, SCIP_Stat::nprimallps, SCIP_Stat::nprimalresolvelpiterations, SCIP_Stat::nprimalresolvelps, SCIP_Col::nsbcalls, 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().
◆ SCIPcolGetStrongbranchLast()
| 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
- Parameters
-
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 4630 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().
◆ SCIPcolGetStrongbranchLPAge()
| 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
- Parameters
-
col LP column stat dynamic problem statistics
Definition at line 4662 of file lp.c.
References SCIP_Stat::nlps, SCIP_Stat::nnodes, NULL, SCIP_Col::sbnode, SCIP_LONGINT_MAX, and SCIP_Col::validsblp.
Referenced by SCIPgetVarStrongbranchLPAge().
◆ SCIPcolMarkNotRemovableLocal()
marks a column to be not removable from the LP in the current node because it became obsolete
- Parameters
-
col LP column stat problem statistics
Definition at line 4674 of file lp.c.
References SCIP_Stat::nnodes, NULL, and SCIP_Col::obsoletenode.
Referenced by SCIPmarkColNotRemovableLocal().
◆ SCIProwCreate()
| 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
- Parameters
-
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 5033 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().
◆ SCIProwFree()
| SCIP_RETCODE SCIProwFree | ( | SCIP_ROW ** | row, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_LP * | lp | ||
| ) |
frees an LP row
- Parameters
-
row pointer to LP row blkmem block memory set global SCIP settings lp current LP data
Definition at line 5174 of file lp.c.
References BMSfreeBlockMemory, BMSfreeBlockMemoryArray, BMSfreeBlockMemoryArrayNull, BMSfreeBlockMemoryNull, NULL, rowUnlink(), SCIP_CALL, SCIP_OKAY, and SCIPeventfilterFree().
Referenced by SCIProwRelease().
◆ SCIProwPrint()
| void SCIProwPrint | ( | SCIP_ROW * | row, |
| SCIP_MESSAGEHDLR * | messagehdlr, | ||
| FILE * | file | ||
| ) |
output row to file stream
- Parameters
-
row LP row messagehdlr message handler file output file (or NULL for standard output)
Definition at line 5206 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().
◆ SCIProwEnsureSize()
| 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
- Parameters
-
row LP row blkmem block memory set global SCIP settings num minimum number of entries to store
Definition at line 612 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().
◆ SCIProwCapture()
| void SCIProwCapture | ( | SCIP_ROW * | row | ) |
increases usage counter of LP row
- Parameters
-
row LP row
Definition at line 5246 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(), and SCIPsepastoreAddCut().
◆ SCIProwRelease()
| 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
- Parameters
-
row pointer to LP row blkmem block memory set global SCIP settings lp current LP data
Definition at line 5259 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(), SCIPsepastoreClearCuts(), sepastoreDelCut(), and subrootFree().
◆ SCIProwDelaySort()
| void SCIProwDelaySort | ( | SCIP_ROW * | row | ) |
enables delaying of row sorting
- Parameters
-
row LP row
Definition at line 6055 of file lp.c.
References SCIP_Row::delaysort, NULL, and TRUE.
Referenced by SCIPaddVarsToRow(), SCIPaddVarsToRowSameCoef(), and SCIPcacheRowExtensions().
◆ SCIProwForceSort()
disables delaying of row sorting, sorts row and merges coefficients with equal columns
- Parameters
-
row LP row set global SCIP settings
Definition at line 6066 of file lp.c.
References SCIP_Row::delaysort, FALSE, NULL, and rowMerge().
Referenced by SCIPaddVarsToRow(), SCIPaddVarsToRowSameCoef(), and SCIPflushRowExtensions().
◆ SCIProwAddCoef()
| 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
- Parameters
-
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 5316 of file lp.c.
References checkLinks, SCIP_Lp::diving, SCIP_Row::lppos, NULL, rowAddCoef(), SCIP_CALL, and SCIP_OKAY.
◆ SCIProwDelCoef()
| 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
- Parameters
-
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 5337 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.
◆ SCIProwChgCoef()
| 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
- Parameters
-
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 5383 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.
◆ SCIProwIncCoef()
| 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 nonexisting coefficient in an LP column
increases value of an existing or non-existing coefficient in an LP row
- Parameters
-
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 5435 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().
◆ SCIProwChgConstant()
| 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
- Parameters
-
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 5492 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().
◆ 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
- Parameters
-
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 5547 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().
◆ SCIProwChgLhs()
| 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
- Parameters
-
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 5573 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().
◆ SCIProwChgRhs()
| 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
- Parameters
-
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 5605 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().
◆ SCIProwChgLocal()
| SCIP_RETCODE SCIProwChgLocal | ( | SCIP_ROW * | row, |
| SCIP_Bool | local | ||
| ) |
changes the local flag of LP row
- Parameters
-
row LP row local new value for local flag
Definition at line 5637 of file lp.c.
References SCIP_Row::local, NULL, and SCIP_OKAY.
Referenced by SCIPsepastoreAddCut().
◆ SCIProwCalcIntegralScalar()
| 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
- Parameters
-
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 5654 of file lp.c.
References ABS, SCIP_Row::cols, SCIP_Row::cols_index, FALSE, isIntegralScalar(), SCIP_Row::len, MIN, nscalars, NULL, REALABS, SCIP_Bool, SCIP_INVALID, SCIP_Longint, SCIP_LONGINT_FORMAT, 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().
◆ 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
- Parameters
-
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 5888 of file lp.c.
References NULL, rowScale(), SCIP_CALL, SCIP_OKAY, SCIP_Real, and SCIProwCalcIntegralScalar().
Referenced by SCIPmakeRowIntegral().
◆ SCIProwRecalcLPActivity()
recalculates the current activity of a row
- Parameters
-
row LP row stat problem statistics
Definition at line 6079 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().
◆ SCIProwGetLPActivity()
returns the activity of a row in the current LP solution
- Parameters
-
row LP row set global SCIP settings stat problem statistics lp current LP data
Definition at line 6131 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().
◆ 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
- Parameters
-
row LP row set global SCIP settings stat problem statistics lp current LP data
Definition at line 6161 of file lp.c.
References SCIP_Row::lhs, MIN, NULL, SCIP_Row::rhs, SCIP_Real, and SCIProwGetLPActivity().
Referenced by SCIPcutpoolSeparate(), SCIPgetRowFeasibility(), SCIPgetRowLPFeasibility(), SCIPgetRowSolFeasibility(), SCIProwGetLPEfficacy(), and SCIProwGetLPSolCutoffDistance().
◆ SCIProwGetRelaxFeasibility()
returns the feasibility of a row in the current relaxed solution: negative value means infeasibility
returns the feasibility of a row in the relaxed solution solution: negative value means infeasibility
- Parameters
-
row LP row set global SCIP settings stat problem statistics
Definition at line 6181 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().
◆ SCIProwGetNLPFeasibility()
returns the feasibility of a row in the current NLP solution: negative value means infeasibility
returns the feasibility of a row in the current NLP solution: negative value means infeasibility
- Parameters
-
row LP row set global SCIP settings stat problem statistics
Definition at line 6243 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().
◆ SCIProwRecalcPseudoActivity()
calculates the current pseudo activity of a row
- Parameters
-
row row data stat problem statistics
Definition at line 6302 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().
◆ SCIProwGetPseudoActivity()
returns the pseudo activity of a row in the current pseudo solution
- Parameters
-
row LP row set global SCIP settings stat problem statistics
Definition at line 6329 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().
◆ SCIProwGetPseudoFeasibility()
returns the pseudo feasibility of a row in the current pseudo solution: negative value means infeasibility
- Parameters
-
row LP row set global SCIP settings stat problem statistics
Definition at line 6357 of file lp.c.
References SCIP_Row::lhs, MIN, NULL, SCIP_Row::rhs, SCIP_Real, and SCIProwGetPseudoActivity().
Referenced by SCIPgetRowFeasibility(), SCIPgetRowPseudoFeasibility(), and SCIPgetRowSolFeasibility().
◆ SCIProwGetSolActivity()
| 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
- Parameters
-
row LP row set global SCIP settings stat problem statistics data sol primal CIP solution
Definition at line 6373 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().
◆ SCIProwGetSolFeasibility()
| 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
- Parameters
-
row LP row set global SCIP settings stat problem statistics data sol primal CIP solution
Definition at line 6415 of file lp.c.
References SCIP_Row::lhs, MIN, NULL, SCIP_Row::rhs, SCIP_Real, and SCIProwGetSolActivity().
Referenced by SCIPcutpoolSeparate(), SCIPgetRowSolFeasibility(), and SCIProwGetSolEfficacy().
◆ SCIProwGetMinActivity()
returns the minimal activity of a row w.r.t. the columns' bounds
- Parameters
-
row LP row set global SCIP settings stat problem statistics data
Definition at line 6505 of file lp.c.
References SCIP_Stat::domchgcount, SCIP_Row::maxactivity, SCIP_Row::minactivity, NULL, rowCalcActivityBounds(), SCIP_INVALID, and SCIP_Row::validactivitybdsdomchg.
Referenced by SCIPaddRow(), SCIPgetRowMinActivity(), SCIPlpRemoveRedundantRows(), SCIProwIsRedundant(), sepastoreIsCutRedundant(), and sepastoreIsCutRedundantOrInfeasible().
◆ SCIProwGetMaxActivity()
returns the maximal activity of a row w.r.t. the columns' bounds
- Parameters
-
row LP row set global SCIP settings stat problem statistics data
Definition at line 6526 of file lp.c.
References SCIP_Stat::domchgcount, SCIP_Row::maxactivity, SCIP_Row::minactivity, NULL, rowCalcActivityBounds(), SCIP_INVALID, and SCIP_Row::validactivitybdsdomchg.
Referenced by SCIPaddRow(), SCIPgetRowMaxActivity(), SCIPlpRemoveRedundantRows(), SCIProwIsRedundant(), sepastoreIsCutRedundant(), and sepastoreIsCutRedundantOrInfeasible().
◆ SCIProwIsRedundant()
returns whether the row is unmodifiable and redundant w.r.t. the columns' bounds
- Parameters
-
row LP row set global SCIP settings stat problem statistics data
Definition at line 6547 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().
◆ SCIProwGetMaxval()
gets maximal absolute value of row vector coefficients
- Parameters
-
row LP row set global SCIP settings
Definition at line 6578 of file lp.c.
References SCIP_Row::len, SCIP_Row::maxval, NULL, SCIP_Row::nummaxval, and rowCalcIdxsAndVals().
Referenced by SCIP_DECL_HASHKEYEQ(), SCIP_DECL_HASHKEYVAL(), SCIPcutpoolAddRow(), SCIPcutpoolIsCutNew(), SCIPgetRowMaxCoef(), SCIProwGetLPEfficacy(), SCIProwGetNLPEfficacy(), SCIProwGetRelaxEfficacy(), and SCIProwGetSolEfficacy().
◆ SCIProwGetMinval()
gets minimal absolute value of row vector's non-zero coefficients
- Parameters
-
row LP row set global SCIP settings
Definition at line 6594 of file lp.c.
References SCIP_Row::len, SCIP_Row::minval, NULL, SCIP_Row::numminval, and rowCalcIdxsAndVals().
Referenced by SCIP_DECL_HASHKEYEQ(), and SCIPgetRowMinCoef().
◆ SCIProwGetMaxidx()
gets maximal column index of row entries
- Parameters
-
row LP row set global SCIP settings
Definition at line 6610 of file lp.c.
References SCIP_Row::len, SCIP_Row::maxidx, NULL, rowCalcIdxsAndVals(), and SCIP_Row::validminmaxidx.
Referenced by SCIPcutpoolAddNewRow().
◆ SCIProwGetMinidx()
gets minimal column index of row entries
- Parameters
-
row LP row set global SCIP settings
Definition at line 6626 of file lp.c.
References SCIP_Row::len, SCIP_Row::minidx, NULL, rowCalcIdxsAndVals(), and SCIP_Row::validminmaxidx.
◆ SCIProwGetNumIntCols()
gets number of integral columns in row
- Parameters
-
row LP row set global SCIP settings
Definition at line 6642 of file lp.c.
References SCIP_Row::len, NULL, SCIP_Row::numintcols, and rowCalcIdxsAndVals().
Referenced by SCIPgetRowNumIntCols(), and SCIPselectCuts().
◆ SCIProwGetLPSolCutoffDistance()
| SCIP_Real SCIProwGetLPSolCutoffDistance | ( | SCIP_ROW * | row, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_SOL * | sol, | ||
| SCIP_LP * | lp | ||
| ) |
returns row's cutoff distance in the direction of the given primal solution
- Parameters
-
row LP row set global SCIP settings stat problem statistics data sol solution to compute direction for cutoff distance; must not be NULL lp current LP data
Definition at line 6658 of file lp.c.
References SCIP_Row::cols, SCIP_Lp::cols, COPYSIGN, ensureSoldirectionSize(), SCIP_Stat::lpcount, SCIP_Col::lppos, SCIP_Lp::ncols, SCIP_Row::nlpcols, NULL, SCIP_Col::primsol, SCIP_CALL_ABORT, SCIP_Real, SCIProwGetLPFeasibility(), SCIPsetIsSumZero(), SCIPsolGetVal(), SCIP_Lp::soldirection, SQR, SQRT, SCIP_Lp::validsoldirlp, SCIP_Lp::validsoldirsol, SCIP_Row::vals, and SCIP_Col::var.
Referenced by SCIPselectCuts().
◆ SCIProwGetLPEfficacy()
returns row's efficacy with respect to the current LP solution: e = -feasibility/norm
- Parameters
-
row LP row set global SCIP settings stat problem statistics data lp current LP data
Definition at line 6715 of file lp.c.
References eps, SCIP_Row::len, MAX, NULL, SCIP_Real, SCIPABORT, SCIPerrorMessage, SCIProwGetLPFeasibility(), SCIProwGetMaxval(), SCIProwGetNorm(), SCIProwGetSumNorm(), and SCIPsetSumepsilon().
Referenced by SCIPcutpoolAddNewRow(), SCIPcutpoolSeparate(), SCIPgetCutEfficacy(), SCIProwIsLPEfficacious(), SCIPselectCuts(), SCIPsepastoreApplyCuts(), and SCIPsepastoreRemoveInefficaciousCuts().
◆ 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
- Parameters
-
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 6756 of file lp.c.
References SCIP_Real, SCIProwGetLPEfficacy(), and SCIPsetIsEfficacious().
Referenced by SCIPisCutEfficacious().
◆ SCIProwGetSolEfficacy()
| 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
- Parameters
-
row LP row set global SCIP settings stat problem statistics data sol primal CIP solution
Definition at line 6772 of file lp.c.
References eps, SCIP_Row::len, MAX, NULL, SCIP_Real, SCIPABORT, SCIPerrorMessage, SCIProwGetMaxval(), SCIProwGetNorm(), SCIProwGetSolFeasibility(), SCIProwGetSumNorm(), and SCIPsetSumepsilon().
Referenced by SCIPcutpoolSeparate(), SCIPgetCutEfficacy(), and SCIProwIsSolEfficacious().
◆ 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
- Parameters
-
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 6815 of file lp.c.
References SCIP_Real, SCIProwGetSolEfficacy(), and SCIPsetIsEfficacious().
Referenced by SCIPisCutEfficacious().
◆ SCIProwGetRelaxEfficacy()
returns row's efficacy with respect to the relaxed solution: e = -feasibility/norm
- Parameters
-
row LP row set global SCIP settings stat problem statistics data
Definition at line 6831 of file lp.c.
References eps, SCIP_Row::len, MAX, NULL, SCIP_Real, SCIPABORT, SCIPerrorMessage, SCIProwGetMaxval(), SCIProwGetNorm(), SCIProwGetRelaxFeasibility(), SCIProwGetSumNorm(), and SCIPsetSumepsilon().
Referenced by SCIPsepastoreRemoveInefficaciousCuts().
◆ SCIProwGetNLPEfficacy()
returns row's efficacy with respect to the NLP solution: e = -feasibility/norm
- Parameters
-
row LP row set global SCIP settings stat problem statistics data
Definition at line 6871 of file lp.c.
References eps, SCIP_Row::len, MAX, NULL, SCIP_Real, SCIPABORT, SCIPerrorMessage, SCIProwGetMaxval(), SCIProwGetNLPFeasibility(), SCIProwGetNorm(), SCIProwGetSumNorm(), and SCIPsetSumepsilon().
Referenced by SCIPsepastoreRemoveInefficaciousCuts().
◆ SCIProwGetObjParallelism()
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
- Parameters
-
row LP row set global SCIP settings lp current LP data
Definition at line 7707 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(), SCIP_Row::sqrnorm, and SQRT.
Referenced by SCIPselectCuts().
◆ SCIProwCatchEvent()
| 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
- Parameters
-
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 7740 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().
◆ SCIProwDropEvent()
| 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
- Parameters
-
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 7764 of file lp.c.
References SCIP_Row::eventfilter, SCIP_Row::name, NULL, SCIP_CALL, SCIP_OKAY, SCIPeventfilterDel(), and SCIPsetDebugMsg.
Referenced by SCIPdropRowEvent().
◆ SCIProwMarkNotRemovableLocal()
marks a row to be not removable from the LP in the current node
marks a row to be not removable from the LP in the current node because it became obsolete
- Parameters
-
row LP row stat problem statistics
Definition at line 7785 of file lp.c.
References SCIP_Stat::nnodes, NULL, and SCIP_Row::obsoletenode.
Referenced by SCIPmarkRowNotRemovableLocal().
◆ SCIPlpCreate()
| SCIP_RETCODE SCIPlpCreate | ( | SCIP_LP ** | lp, |
| SCIP_SET * | set, | ||
| SCIP_MESSAGEHDLR * | messagehdlr, | ||
| SCIP_STAT * | stat, | ||
| const char * | name | ||
| ) |
creates empty LP data object
- Parameters
-
lp pointer to LP data object set global SCIP settings messagehdlr message handler stat problem statistics name problem name
Definition at line 8983 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_OBJLIM, SCIP_LPPAR_POLISHING, SCIP_LPPAR_PRESOLVING, SCIP_LPPAR_PRICING, SCIP_LPPAR_RANDOMSEED, SCIP_LPPAR_REFACTOR, SCIP_LPPAR_ROWREPSWITCH, SCIP_LPPAR_SCALING, SCIP_LPPAR_THREADS, SCIP_LPPAR_TIMING, SCIP_LPSOLSTAT_OPTIMAL, SCIP_OBJSEN_MINIMIZE, SCIP_OKAY, SCIP_PARAMETERWRONGVAL, SCIP_PRICING_AUTO, SCIP_VERBLEVEL_FULL, SCIPerrorMessage, SCIPlpiCreate(), SCIPlpiGetSolverName(), SCIPlpiInfinity(), SCIPmessagePrintVerbInfo(), SCIPsetBarrierconvtol(), SCIPsetDualfeastol(), SCIPsetInfinity(), SCIPsetLpfeastol(), and TRUE.
Referenced by SCIPtransformProb().
◆ SCIPlpFree()
| SCIP_RETCODE SCIPlpFree | ( | SCIP_LP ** | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue, | ||
| SCIP_EVENTFILTER * | eventfilter | ||
| ) |
frees LP data object
- Parameters
-
lp pointer to LP data object blkmem block memory set global SCIP settings eventqueue event queue eventfilter global event filter
Definition at line 9264 of file lp.c.
References BMSfreeMemory, BMSfreeMemoryArrayNull, BMSfreeMemoryNull, freeDiveChgSideArrays(), NULL, SCIP_CALL, SCIP_OKAY, SCIPlpClear(), SCIPlpiFree(), and SCIProwRelease().
Referenced by freeTransform().
◆ SCIPlpReset()
| 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
- Parameters
-
lp LP data blkmem block memory set global SCIP settings stat problem statistics eventqueue event queue eventfilter global event filter
Definition at line 9309 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, SCIP_Lp::validsoldirlp, SCIP_Lp::validsoldirsol, and SCIP_Lp::validsollp.
Referenced by freeReoptSolve(), freeSolve(), and initSolve().
◆ SCIPlpAddCol()
| SCIP_RETCODE SCIPlpAddCol | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_COL * | col, | ||
| int | depth | ||
| ) |
adds a column to the LP and captures the variable
adds a column to the LP
- Parameters
-
lp LP data set global SCIP settings col LP column depth depth in the tree where the column addition is performed
Definition at line 9342 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().
◆ SCIPlpAddRow()
| 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
- Parameters
-
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 9401 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().
◆ SCIPlpShrinkCols()
| SCIP_RETCODE SCIPlpShrinkCols | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| int | newncols | ||
| ) |
removes all columns after the given number of columns from the LP
removes all columns after the given number of cols from the LP
- Parameters
-
lp LP data set global SCIP settings newncols new number of columns in the LP
Definition at line 9525 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().
◆ SCIPlpShrinkRows()
| 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
- Parameters
-
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 9597 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, r, 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().
◆ SCIPlpClear()
| 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
- Parameters
-
lp LP data blkmem block memory set global SCIP settings eventqueue event queue eventfilter global event filter
Definition at line 9663 of file lp.c.
References SCIP_Lp::diving, NULL, SCIP_CALL, SCIP_OKAY, SCIPlpShrinkCols(), SCIPlpShrinkRows(), and SCIPsetDebugMsg.
Referenced by SCIPlpFree(), SCIPlpReset(), and SCIPtreeLoadLP().
◆ SCIPlpMarkSize()
| void SCIPlpMarkSize | ( | SCIP_LP * | lp | ) |
remembers number of columns and rows to track the newly added ones
- Parameters
-
lp current LP data
Definition at line 9682 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().
◆ SCIPlpSetSizeMark()
| void SCIPlpSetSizeMark | ( | SCIP_LP * | lp, |
| int | nrows, | ||
| int | ncols | ||
| ) |
sets the remembered number of columns and rows to the given values
- Parameters
-
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 9694 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::firstnewcol, SCIP_Lp::firstnewrow, and NULL.
Referenced by treeBacktrackProbing().
◆ SCIPlpGetBasisInd()
| 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
- Parameters
-
lp LP data basisind pointer to store basis indices ready to keep number of rows entries
Definition at line 9708 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().
◆ SCIPlpGetBase()
| 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
- Parameters
-
lp LP data cstat array to store column basis status, or NULL rstat array to store row basis status, or NULL
Definition at line 9725 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, SCIPlpiGetBase(), SCIP_Lp::solisbasic, and SCIP_Lp::solved.
◆ SCIPlpGetBInvRow()
| 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
- Parameters
-
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 9742 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().
◆ SCIPlpGetBInvCol()
| 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
- Parameters
-
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 9764 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().
◆ SCIPlpGetBInvARow()
| 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)
- Parameters
-
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 9790 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().
◆ SCIPlpGetBInvACol()
| 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
- Parameters
-
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 9815 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().
◆ SCIPlpSumRows()
| 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
- Parameters
-
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 9839 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, r, 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().
◆ SCIPlpCalcMIR()
| SCIP_RETCODE SCIPlpCalcMIR | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_PROB * | prob, | ||
| SCIP_SOL * | sol, | ||
| SCIP_Real | boundswitch, | ||
| SCIP_Bool | usevbds, | ||
| SCIP_Bool | allowlocal, | ||
| SCIP_Bool | fixintegralrhs, | ||
| int * | boundsfortrans, | ||
| SCIP_BOUNDTYPE * | boundtypesfortrans, | ||
| int | maxmksetcoefs, | ||
| SCIP_Real | maxweightrange, | ||
| SCIP_Real | minfrac, | ||
| SCIP_Real | maxfrac, | ||
| SCIP_Real * | weights, | ||
| SCIP_Real | maxweight, | ||
| int * | weightinds, | ||
| int | nweightinds, | ||
| int | rowlensum, | ||
| int * | sidetypes, | ||
| SCIP_Real | scale, | ||
| SCIP_Real * | mksetcoefs, | ||
| SCIP_Bool * | mksetcoefsvalid, | ||
| SCIP_Real * | mircoef, | ||
| SCIP_Real * | mirrhs, | ||
| SCIP_Real * | cutactivity, | ||
| SCIP_Bool * | success, | ||
| SCIP_Bool * | cutislocal, | ||
| int * | cutrank | ||
| ) |
- Parameters
-
lp LP data set global SCIP settings stat problem statistics prob problem data sol the solution that should be separated, or NULL for LP solution boundswitch fraction of domain up to which lower bound is used in transformation usevbds should variable bounds be used in bound transformation? allowlocal should local information allowed to be used, resulting in a local cut? fixintegralrhs should complementation tried to be adjusted such that rhs gets fractional? boundsfortrans bounds that should be used for transformed variables: vlb_idx/vub_idx, -1 for global lb/ub, -2 for local lb/ub, or -3 for using closest bound; NULL for using closest bound for all variables boundtypesfortrans type of bounds that should be used for transformed variables; NULL for using closest bound for all variables maxmksetcoefs maximal number of nonzeros allowed in aggregated base inequality maxweightrange maximal valid range max(|weights|)/min(|weights|) of row weights minfrac minimal fractionality of rhs to produce MIR cut for maxfrac maximal fractionality of rhs to produce MIR cut for weights row weights in row summation maxweight largest magnitude of weights; set to -1 if sparsity information is unknown weightinds sparsity pattern of weights; size nrowinds; NULL if sparsity info is unknown nweightinds number of nonzeros in weights; -1 if rowinds is NULL rowlensum total number of non-zeros in used rows (row associated with nonzero weight coefficient); -1 if unknown sidetypes specify row side type (-1 = lhs, 0 = unkown, 1 = rhs) or NULL for automatic choices scale additional scaling factor multiplied to all rows mksetcoefs array to store mixed knapsack set coefficients: size nvars; or NULL mksetcoefsvalid pointer to store whether mixed knapsack set coefficients are valid; or NULL mircoef array to store MIR coefficients: must be of size nvars mirrhs pointer to store the right hand side of the MIR row cutactivity pointer to store the activity of the resulting cut success pointer to store whether the returned coefficients are a valid MIR cut cutislocal pointer to store whether the returned cut is only valid locally cutrank pointer to store the rank of the returned cut; or NULL
◆ SCIPlpCalcStrongCG()
| SCIP_RETCODE SCIPlpCalcStrongCG | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_PROB * | prob, | ||
| SCIP_Real | boundswitch, | ||
| SCIP_Bool | usevbds, | ||
| SCIP_Bool | allowlocal, | ||
| int | maxmksetcoefs, | ||
| SCIP_Real | maxweightrange, | ||
| SCIP_Real | minfrac, | ||
| SCIP_Real | maxfrac, | ||
| SCIP_Real * | weights, | ||
| int * | rowinds, | ||
| int | nrowinds, | ||
| SCIP_Real | scale, | ||
| SCIP_Real * | strongcgcoef, | ||
| SCIP_Real * | strongcgrhs, | ||
| SCIP_Real * | cutactivity, | ||
| SCIP_Bool * | success, | ||
| SCIP_Bool * | cutislocal, | ||
| int * | cutrank | ||
| ) |
- Parameters
-
lp LP data set global SCIP settings stat problem statistics prob problem data boundswitch fraction of domain up to which lower bound is used in transformation usevbds should variable bounds be used in bound transformation? allowlocal should local information allowed to be used, resulting in a local cut? maxmksetcoefs maximal number of nonzeros allowed in aggregated base inequality maxweightrange maximal valid range max(|weights|)/min(|weights|) of row weights minfrac minimal fractionality of rhs to produce strong CG cut for maxfrac maximal fractionality of rhs to produce strong CG cut for weights row weights in row summation rowinds array to store indices of non-zero entries of the weights array, or NULL nrowinds number of non-zero entries in weights array, -1 if rowinds is NULL scale additional scaling factor multiplied to all rows strongcgcoef array to store strong CG coefficients: must be of size nvars strongcgrhs pointer to store the right hand side of the strong CG row cutactivity pointer to store the activity of the resulting cut success pointer to store whether the returned coefficients are a valid strong CG cut cutislocal pointer to store whether the returned cut is only valid locally cutrank pointer to store the rank of the returned cut; or NULL
◆ SCIPlpGetState()
| SCIP_RETCODE SCIPlpGetState | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_LPISTATE ** | lpistate | ||
| ) |
stores LP state (like basis information) into LP state object
- Parameters
-
lp LP data blkmem block memory lpistate pointer to LP state information (like basis information)
Definition at line 9925 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().
◆ SCIPlpSetState()
| 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
- Parameters
-
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 9949 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().
◆ SCIPlpFreeState()
| SCIP_RETCODE SCIPlpFreeState | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_LPISTATE ** | lpistate | ||
| ) |
frees LP state information
- Parameters
-
lp LP data blkmem block memory lpistate pointer to LP state information (like basis information)
Definition at line 9991 of file lp.c.
References SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, and SCIPlpiFreeState().
Referenced by forkReleaseLPIState(), probingnodeFree(), probingnodeUpdate(), SCIPlpEndDive(), SCIPtreeEndProbing(), SCIPtreeSetProbingLPState(), and subrootReleaseLPIState().
◆ SCIPlpGetNorms()
| SCIP_RETCODE SCIPlpGetNorms | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_LPINORMS ** | lpinorms | ||
| ) |
stores pricing norms into LP norms object
- Parameters
-
lp LP data blkmem block memory lpinorms pointer to LP pricing norms information
Definition at line 10008 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 probingnodeUpdate(), and SCIPtreeStartProbing().
◆ SCIPlpSetNorms()
| SCIP_RETCODE SCIPlpSetNorms | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_LPINORMS * | lpinorms | ||
| ) |
loads pricing norms from LP norms object into solver
- Parameters
-
lp LP data blkmem block memory lpinorms LP pricing norms information
Definition at line 10032 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, and SCIPlpiSetNorms().
Referenced by SCIPtreeEndProbing(), and SCIPtreeLoadProbingLPState().
◆ SCIPlpFreeNorms()
| SCIP_RETCODE SCIPlpFreeNorms | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_LPINORMS ** | lpinorms | ||
| ) |
frees pricing norms information
- Parameters
-
lp LP data blkmem block memory lpinorms pointer to LP pricing norms information
Definition at line 10052 of file lp.c.
References SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, and SCIPlpiFreeNorms().
Referenced by probingnodeFree(), probingnodeUpdate(), SCIPtreeEndProbing(), and SCIPtreeSetProbingLPState().
◆ SCIPlpGetCutoffbound()
return the current cutoff bound of the lp
- Parameters
-
lp current LP data
Definition at line 10066 of file lp.c.
References SCIP_Lp::cutoffbound, and NULL.
Referenced by SCIPreoptCheckCutoff().
◆ SCIPlpSetCutoffbound()
| SCIP_RETCODE SCIPlpSetCutoffbound | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_PROB * | prob, | ||
| SCIP_Real | cutoffbound | ||
| ) |
sets the upper objective limit of the LP solver
- Parameters
-
lp current LP data set global SCIP settings prob problem data cutoffbound new upper objective limit
Definition at line 10076 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().
◆ SCIPlpFlush()
| SCIP_RETCODE SCIPlpFlush | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_EVENTQUEUE * | eventqueue | ||
| ) |
applies all cached changes to the LP solver
- Parameters
-
lp current LP data blkmem block memory set global SCIP settings eventqueue event queue
Definition at line 8578 of file lp.c.
References checkLinks, SCIP_Lp::cutoffbound, 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::lpiobjlim, SCIP_Lp::lpsolstat, SCIP_Lp::nchgcols, SCIP_Lp::nchgrows, SCIP_Lp::ncols, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, SCIP_Lp::nrows, NULL, SCIP_CALL, SCIP_LPSOLSTAT_NOTSOLVED, SCIP_OKAY, SCIPlpiGetNCols(), SCIPlpiGetNRows(), SCIPsetDebugMsg, SCIP_Lp::solved, and TRUE.
Referenced by focusnodeCleanupVars(), lpFlushAndSolve(), priceAndCutLoop(), SCIPflushLP(), SCIPlpEndDive(), SCIPlpReset(), SCIPlpSetState(), SCIPlpSolveAndEval(), SCIPtreeEndProbing(), SCIPwriteLP(), and SCIPwriteMIP().
◆ SCIPlpMarkFlushed()
| SCIP_RETCODE SCIPlpMarkFlushed | ( | SCIP_LP * | lp, |
| SCIP_SET * | set | ||
| ) |
marks the LP to be flushed, even if the LP thinks it is not flushed
- Parameters
-
lp current LP data set global SCIP settings
Definition at line 8639 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.
◆ 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
- Parameters
-
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 12222 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::lpiobjlim, 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_LONGINT_FORMAT, 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().
◆ SCIPlpGetSolstat()
| SCIP_LPSOLSTAT SCIPlpGetSolstat | ( | SCIP_LP * | lp | ) |
gets solution status of current LP
- Parameters
-
lp current LP data
Definition at line 12902 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(), SCIPcutpoolAddNewRow(), 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().
◆ SCIPlpSetRootLPIsRelax()
sets whether the root LP is a relaxation of the problem and its optimal objective value is a global lower bound
sets whether the root lp is a relaxation of the problem and its optimal objective value is a global lower bound
- Parameters
-
lp LP data isrelax is the root lp a relaxation of the problem?
Definition at line 17346 of file lp.c.
References NULL, and SCIP_Lp::rootlpisrelax.
Referenced by SCIPprobStoreRootSol().
◆ SCIPlpIsRootLPRelax()
returns whether the root lp is a relaxation of the problem and its optimal objective value is a global lower bound
- Parameters
-
lp LP data
Definition at line 17357 of file lp.c.
References NULL, and SCIP_Lp::rootlpisrelax.
Referenced by SCIPisRootLPRelax().
◆ SCIPlpGetObjval()
gets objective value of current LP
- Note
- This method returns the objective value of the current LP solution, which might be primal or dual infeasible if a limit was hit during solving. It must not be used as a dual bound if the LP solution status is SCIP_LPSOLSTAT_ITERLIMIT or SCIP_LPSOLSTAT_TIMELIMIT.
- Parameters
-
lp current LP data set global SCIP settings prob problem data
Definition at line 12918 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().
◆ SCIPlpGetColumnObjval()
gets part of objective value of current LP that results from COLUMN variables only
- Parameters
-
lp current LP data
Definition at line 12946 of file lp.c.
References SCIP_Lp::flushed, SCIP_Lp::lpobjval, NULL, SCIP_INVALID, and SCIP_Lp::solved.
Referenced by SCIPgetLPColumnObjval(), SCIPlpStoreRootObjval(), and SCIPprobStoreRootSol().
◆ SCIPlpGetLooseObjval()
gets part of objective value of current LP that results from LOOSE variables only
- Parameters
-
lp current LP data set global SCIP settings prob problem data
Definition at line 12957 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().
◆ SCIPlpStoreRootObjval()
remembers the current LP objective value as root solution value
- Parameters
-
lp current LP data set global SCIP settings prob problem data
Definition at line 12977 of file lp.c.
References NULL, SCIP_Lp::rootlooseobjval, SCIP_Lp::rootlpobjval, SCIPlpGetColumnObjval(), and SCIPlpGetLooseObjval().
Referenced by SCIPprobStoreRootSol().
◆ SCIPlpInvalidateRootObjval()
| void SCIPlpInvalidateRootObjval | ( | SCIP_LP * | lp | ) |
invalidates the root LP solution value
- Parameters
-
lp current LP data
Definition at line 12990 of file lp.c.
References NULL, SCIP_Lp::rootlooseobjval, SCIP_Lp::rootlpobjval, and SCIP_INVALID.
Referenced by freeReoptSolve(), and freeSolve().
◆ SCIPlpGetGlobalPseudoObjval()
gets the global pseudo objective value; that is all variables set to their best (w.r.t. the objective function) global bound
- Parameters
-
lp current LP data set global SCIP settings prob problem data
Definition at line 13069 of file lp.c.
References SCIP_Lp::glbpseudoobjval, SCIP_Lp::glbpseudoobjvalid, SCIP_Lp::glbpseudoobjvalinf, NULL, recomputeGlbPseudoObjectiveValue(), SCIPsetInfinity(), and SCIPsetIsInfinity().
Referenced by SCIPgetGlobalPseudoObjval(), and solveNode().
◆ SCIPlpRecomputeLocalAndGlobalPseudoObjval()
recomputes local and global pseudo objective values
- Parameters
-
lp current LP data set global SCIP settings prob problem data
Definition at line 13001 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().
◆ SCIPlpGetPseudoObjval()
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
- Parameters
-
lp current LP data set global SCIP settings prob problem data
Definition at line 13101 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().
◆ SCIPlpGetModifiedPseudoObjval()
| 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
- Parameters
-
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 13131 of file lp.c.
References getFinitePseudoObjval(), SCIP_Lp::pseudoobjvalinf, REALABS, SCIP_Real, SCIPsetInfinity(), SCIPsetIsInfinity(), SCIPsetIsZero(), SCIPvarGetBestBoundType(), and SCIPvarGetObj().
Referenced by SCIPnodeAddBoundinfer().
◆ SCIPlpGetModifiedProvedPseudoObjval()
| 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
- Parameters
-
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 13171 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().
◆ SCIPlpUpdateVarObj()
| 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
- Parameters
-
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 13637 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().
◆ SCIPlpUpdateVarLbGlobal()
| 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
- Parameters
-
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 13691 of file lp.c.
References FALSE, getObjvalDeltaLb(), lpUpdateObjval(), NULL, SCIP_OKAY, SCIP_Real, SCIPsetIsEQ(), SCIPsetIsPositive(), SCIPvarGetObj(), and TRUE.
Referenced by SCIPeventProcess().
◆ SCIPlpUpdateVarLb()
| 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
- Parameters
-
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 13718 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().
◆ SCIPlpUpdateVarUbGlobal()
| 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
- Parameters
-
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 13759 of file lp.c.
References FALSE, getObjvalDeltaUb(), lpUpdateObjval(), NULL, SCIP_OKAY, SCIP_Real, SCIPsetIsEQ(), SCIPsetIsNegative(), SCIPvarGetObj(), and TRUE.
Referenced by SCIPeventProcess().
◆ SCIPlpUpdateVarUb()
| 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
- Parameters
-
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 13786 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().
◆ SCIPlpUpdateAddVar()
| SCIP_RETCODE SCIPlpUpdateAddVar | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var | ||
| ) |
informs LP, that given variable was added to the problem
- Parameters
-
lp current LP data set global SCIP settings var variable that is now a LOOSE problem variable
Definition at line 13827 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().
◆ SCIPlpUpdateDelVar()
| SCIP_RETCODE SCIPlpUpdateDelVar | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_VAR * | var | ||
| ) |
informs LP, that given variable is to be deleted from the problem
- Parameters
-
lp current LP data set global SCIP settings var variable that will be deleted from the problem
Definition at line 13848 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().
◆ 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
- Parameters
-
lp current LP data set global SCIP settings var problem variable that changed from LOOSE to COLUMN
Definition at line 13984 of file lp.c.
References lpUpdateVarColumn(), lpUpdateVarColumnProved(), NULL, SCIP_CALL, and SCIP_OKAY.
Referenced by SCIPvarColumn().
◆ 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
- Parameters
-
lp current LP data set global SCIP settings var problem variable that changed from COLUMN to LOOSE
Definition at line 14108 of file lp.c.
References lpUpdateVarLoose(), lpUpdateVarLooseProved(), NULL, SCIP_CALL, and SCIP_OKAY.
Referenced by SCIPvarLoose().
◆ SCIPlpDecNLoosevars()
| void SCIPlpDecNLoosevars | ( | SCIP_LP * | lp | ) |
decrease the number of loose variables by one
- Parameters
-
lp current LP data
Definition at line 14129 of file lp.c.
References SCIP_Lp::looseobjval, SCIP_Lp::looseobjvalinf, SCIP_Lp::nloosevars, and NULL.
Referenced by lpUpdateVarColumn(), SCIPlpUpdateDelVar(), SCIPvarFix(), and SCIPvarMultiaggregate().
◆ SCIPlpGetSol()
| 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
- Parameters
-
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 14147 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, r, SCIP_Col::redcost, SCIP_BASESTAT_BASIC, SCIP_Bool, SCIP_CALL, SCIP_Longint, SCIP_LONGINT_FORMAT, 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().
◆ SCIPlpGetUnboundedSol()
| 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
- Parameters
-
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 14441 of file lp.c.
References SCIP_Row::activity, SCIP_Row::cols, SCIP_Row::constant, SCIP_Row::dualsol, FALSE, SCIP_Lp::flushed, SCIP_Col::lb, SCIP_Row::lhs, SCIP_Row::linkpos, SCIP_Stat::lpcount, SCIP_Lp::lpi, SCIP_Lp::lpicols, SCIP_Lp::lpirows, SCIP_Lp::lpobjval, SCIP_Col::lppos, SCIP_Lp::lpsolstat, MAX, MIN, SCIP_Row::nlpcols, SCIP_Lp::nlpicols, SCIP_Lp::nlpirows, NULL, SCIP_Row::nunlinked, SCIP_Col::obj, SCIP_Col::primsol, r, SCIP_Col::redcost, SCIP_Row::rhs, SCIP_CALL, SCIP_INVALID, SCIP_Longint, SCIP_LONGINT_FORMAT, SCIP_LPERROR, SCIP_LPSOLSTAT_UNBOUNDEDRAY, SCIP_OKAY, SCIP_Real, SCIPerrorMessage, SCIPlpiGetPrimalRay(), SCIPlpiGetSol(), SCIPlpiHasPrimalRay(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPsetInfinity(), SCIPsetIsFeasGE(), SCIPsetIsFeasGT(), SCIPsetIsFeasLE(), SCIPsetIsFeasLT(), SCIPsetIsFeasNegative(), SCIPsetIsFeasPositive(), SCIPsetIsFeasZero(), SCIPsetIsInfinity(), SCIPsetIsNegative(), SCIPsetIsPositive(), SCIPsetIsZero(), SCIPvarGetNLocksDown(), SCIPvarGetNLocksUp(), SCIP_Lp::solved, TRUE, SCIP_Col::ub, SCIP_Row::validactivitylp, SCIP_Col::validredcostlp, SCIP_Lp::validsollp, SCIP_Row::vals, and SCIP_Col::var.
Referenced by SCIPlpSolveAndEval(), and SCIPlpStartDive().
◆ SCIPlpGetPrimalRay()
| SCIP_RETCODE SCIPlpGetPrimalRay | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_Real * | ray | ||
| ) |
returns primal ray proving the unboundedness of the current LP
- Parameters
-
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 14700 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().
◆ SCIPlpGetDualfarkas()
| SCIP_RETCODE SCIPlpGetDualfarkas | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat, | ||
| SCIP_Bool * | valid | ||
| ) |
stores the dual Farkas multipliers for infeasibility proof in rows. besides, the proof is checked for validity if lp/checkfarkas = TRUE.
- Note
- the check will not be performed if
validis NULL.
- Parameters
-
lp current LP data set global SCIP settings stat problem statistics valid pointer to store whether the Farkas proof is valid or NULL
Definition at line 14761 of file lp.c.
References SCIP_Row::activity, SCIP_Row::basisstatus, BMSclearMemoryArray, SCIP_Row::constant, SCIP_Row::dualfarkas, SCIP_Row::dualsol, FALSE, SCIP_Lp::flushed, SCIP_Row::len, SCIP_Row::lhs, 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, r, REALABS, SCIP_Col::redcost, SCIP_Row::rhs, SCIP_BASESTAT_BASIC, SCIP_Bool, SCIP_CALL, SCIP_INVALID, SCIP_LPSOLSTAT_INFEASIBLE, SCIP_OKAY, SCIP_Real, SCIPcolGetLb(), SCIPcolGetLPPos(), SCIPcolGetUb(), SCIPlpiGetDualfarkas(), SCIProwGetName(), SCIPsetAllocBufferArray, SCIPsetDebugMsg, SCIPsetFreeBufferArray, SCIPsetIsDualfeasGT(), SCIPsetIsDualfeasLT(), SCIPsetIsFeasZero(), SCIPsetIsGE(), SCIPsetIsInfinity(), SCIP_Lp::solved, TRUE, SCIP_Row::validactivitylp, SCIP_Col::validfarkaslp, SCIP_Lp::validfarkaslp, SCIP_Col::validredcostlp, and SCIP_Row::vals.
Referenced by SCIPlpSolveAndEval(), and SCIPlpStartDive().
◆ SCIPlpGetIterations()
| SCIP_RETCODE SCIPlpGetIterations | ( | SCIP_LP * | lp, |
| int * | iterations | ||
| ) |
get number of iterations used in last LP solve
- Parameters
-
lp current LP data iterations pointer to store the iteration count
Definition at line 14934 of file lp.c.
References SCIP_Lp::lpi, NULL, SCIP_CALL, SCIP_OKAY, and SCIPlpiGetIterations().
Referenced by lpBarrier(), lpDualSimplex(), lpLexDualSimplex(), and lpPrimalSimplex().
◆ SCIPlpUpdateAges()
| SCIP_RETCODE SCIPlpUpdateAges | ( | SCIP_LP * | lp, |
| SCIP_STAT * | stat | ||
| ) |
increases age of columns with solution value 0.0 and rows with activity not at its bounds, resets age of non-zero columns and sharp rows
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
- Parameters
-
lp current LP data stat problem statistics
Definition at line 14949 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, r, SCIP_Lp::rows, SCIP_OKAY, SCIPdebugMessage, SCIP_Lp::solved, and SCIP_Lp::validsollp.
Referenced by SCIPlpSolveAndEval().
◆ 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
- Parameters
-
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 15358 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().
◆ SCIPlpRemoveAllObsoletes()
| 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
- Parameters
-
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 15389 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().
◆ 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
- Parameters
-
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 15558 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().
◆ SCIPlpCleanupAll()
| 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
- Parameters
-
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 15597 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().
◆ SCIPlpRemoveRedundantRows()
| 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
- Parameters
-
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 15636 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, r, 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().
◆ SCIPlpStartDive()
| SCIP_RETCODE SCIPlpStartDive | ( | SCIP_LP * | lp, |
| BMS_BLKMEM * | blkmem, | ||
| SCIP_SET * | set, | ||
| SCIP_STAT * | stat | ||
| ) |
initiates LP diving
- Parameters
-
lp current LP data blkmem block memory set global SCIP settings stat problem statistics
Definition at line 15710 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::divenolddomchgs, SCIP_Lp::diving, SCIP_Lp::divinglpiitlim, SCIP_Stat::domchgcount, 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, r, 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().
◆ SCIPlpEndDive()
| 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
- Parameters
-
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 15816 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::divenolddomchgs, SCIP_Lp::diving, SCIP_Lp::divinglazyapplied, SCIP_Lp::divinglpiitlim, SCIP_Lp::divingobjchg, SCIP_Stat::domchgcount, 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, r, 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().
◆ SCIPlpRecordOldRowSideDive()
| 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
- Parameters
-
lp LP data object row row affected by the change sidetype side type
Definition at line 15998 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().
◆ SCIPlpStartProbing()
| SCIP_RETCODE SCIPlpStartProbing | ( | SCIP_LP * | lp | ) |
informs the LP that probing mode was initiated
- Parameters
-
lp current LP data
Definition at line 16022 of file lp.c.
References NULL, SCIP_Lp::probing, SCIP_OKAY, SCIP_Lp::strongbranching, SCIP_Lp::strongbranchprobing, and TRUE.
Referenced by SCIPtreeStartProbing().
◆ SCIPlpEndProbing()
| SCIP_RETCODE SCIPlpEndProbing | ( | SCIP_LP * | lp | ) |
informs the LP that probing mode was finished
- Parameters
-
lp current LP data
Definition at line 16037 of file lp.c.
References FALSE, NULL, SCIP_Lp::probing, SCIP_OKAY, SCIP_Lp::strongbranching, and SCIP_Lp::strongbranchprobing.
Referenced by SCIPtreeEndProbing().
◆ SCIPlpStartStrongbranchProbing()
| void SCIPlpStartStrongbranchProbing | ( | SCIP_LP * | lp | ) |
informs the LP that the probing mode is now used for strongbranching
- Parameters
-
lp current LP data
Definition at line 16052 of file lp.c.
References NULL, SCIP_Lp::probing, SCIP_Lp::strongbranching, SCIP_Lp::strongbranchprobing, and TRUE.
Referenced by SCIPstartStrongbranch().
◆ SCIPlpEndStrongbranchProbing()
| void SCIPlpEndStrongbranchProbing | ( | SCIP_LP * | lp | ) |
informs the LP that the probing mode is not used for strongbranching anymore
- Parameters
-
lp current LP data
Definition at line 16065 of file lp.c.
References FALSE, NULL, SCIP_Lp::probing, SCIP_Lp::strongbranching, and SCIP_Lp::strongbranchprobing.
Referenced by SCIPendStrongbranch().
◆ SCIPlpGetProvedLowerbound()
| SCIP_RETCODE SCIPlpGetProvedLowerbound | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_Real * | bound | ||
| ) |
gets proven lower (dual) bound of last LP solution
- Parameters
-
lp current LP data set global SCIP settings bound pointer to store proven dual bound
Definition at line 16198 of file lp.c.
References FALSE, provedBound(), SCIP_CALL, SCIP_OKAY, and SCIPsetDebugMsg.
Referenced by SCIPnodeUpdateLowerboundLP(), and solveNodeInitialLP().
◆ SCIPlpIsInfeasibilityProved()
| SCIP_RETCODE SCIPlpIsInfeasibilityProved | ( | SCIP_LP * | lp, |
| SCIP_SET * | set, | ||
| SCIP_Bool * | proved | ||
| ) |
gets proven dual bound of last LP solution
- Parameters
-
lp current LP data set global SCIP settings proved pointer to store whether infeasibility is proven
Definition at line 16212 of file lp.c.
References bound, NULL, provedBound(), SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPsetDebugMsg, and TRUE.
◆ SCIPlpWrite()
| SCIP_RETCODE SCIPlpWrite | ( | SCIP_LP * | lp, |
| const char * | fname | ||
| ) |
writes LP to a file
- Parameters
-
lp current LP data fname file name
Definition at line 16234 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().
◆ SCIPlpWriteMip()
| 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 to a file
writes MIP relaxation of the current B&B node to a file
- Note
- the transformed problem in SCIP is always a minimization problem
- Parameters
-
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 16249 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().
◆ SCIPlpRecalculateObjSqrNorm()
recalculates Euclidean norm of objective function vector of column variables if it have gotten unreliable during calculation
- Parameters
-
set global SCIP settings lp LP data
Definition at line 17303 of file lp.c.
References SCIP_Lp::cols, FALSE, MAX, SCIP_Lp::ncols, NULL, SCIP_Lp::objsqrnorm, SCIP_Lp::objsqrnormunreliable, SCIPsetIsGE(), and SQR.
Referenced by SCIPgetObjNorm(), and SCIProwGetObjParallelism().
◆ SCIPlpComputeRelIntPoint()
| 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
compute relative interior point
We use the approach of
- R. Freund, R. Roundy, M. J. Todd
- "Identifying the Set of Always-Active Constraints in a System of Linear Inequalities by a Single Linear Program"
- Tech. Rep, No. 1674-85, Sloan School, M.I.T., 1985
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.
- Parameters
-
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 18230 of file lp.c.
References BMSclearMemoryArray, computeRelIntPoint(), SCIP_Lp::cutoffbound, FALSE, SCIP_Lp::looseobjval, SCIP_Lp::looseobjvalinf, SCIP_Lp::ncols, SCIP_Lp::nrows, NULL, SCIP_CALL, SCIP_INVALID, SCIP_LPERROR, SCIP_OBJSEN_MAXIMIZE, SCIP_OKAY, SCIPlpiCreate(), SCIPlpiFree(), SCIPsetDebugMsg, SCIPsetIsInfinity(), and TRUE.
Referenced by SCIPcomputeLPRelIntPoint().
◆ SCIPlpGetCols()
gets array with columns of the LP
- Parameters
-
lp current LP data
Definition at line 17219 of file lp.c.
References SCIP_Lp::cols, and NULL.
Referenced by branchcandCalcLPCands(), forkFree(), SCIPcomputeLPRelIntPoint(), SCIPgetLPCols(), SCIPgetLPColsData(), and SCIPsolLinkLPSol().
◆ SCIPlpGetNCols()
| int SCIPlpGetNCols | ( | SCIP_LP * | lp | ) |
gets current number of columns in LP
- Parameters
-
lp current LP data
Definition at line 17229 of file lp.c.
References SCIP_Lp::ncols, and NULL.
Referenced by branchcandCalcLPCands(), focusnodeCleanupVars(), focusnodeToFork(), forkFree(), getDualProof(), initLP(), probingnodeCreate(), probingnodeUpdate(), runBoundHeuristic(), SCIPcomputeLPRelIntPoint(), SCIPgetLPColsData(), SCIPgetNLPCols(), SCIPnodeFocus(), SCIPpricestoreAddProbVars(), SCIPpricestoreApplyVars(), SCIPprobAllColsInLP(), SCIPsolLinkLPSol(), SCIPtreeLoadLP(), and treeBacktrackProbing().
◆ SCIPlpGetRows()
gets array with rows of the LP
- Parameters
-
lp current LP data
Definition at line 17239 of file lp.c.
References NULL, and SCIP_Lp::rows.
Referenced by forkFree(), getDualProof(), getFarkasProof(), runBoundHeuristic(), SCIPgetLPRows(), SCIPgetLPRowsData(), and storeCuts().
◆ SCIPlpGetNRows()
| int SCIPlpGetNRows | ( | SCIP_LP * | lp | ) |
gets current number of rows in LP
- Parameters
-
lp current LP data
Definition at line 17249 of file lp.c.
References SCIP_Lp::nrows, and NULL.
Referenced by focusnodeToFork(), forkFree(), getDualProof(), getFarkasProof(), initLP(), probingnodeCreate(), probingnodeUpdate(), runBoundHeuristic(), SCIPgetLPRowsData(), SCIPgetNLPRows(), SCIPnodeFocus(), SCIPtreeLoadLP(), storeCuts(), and treeBacktrackProbing().
◆ SCIPlpGetNewcols()
gets array with newly added columns after the last mark
- Parameters
-
lp current LP data
Definition at line 17259 of file lp.c.
References SCIP_Lp::cols, SCIP_Lp::firstnewcol, SCIP_Lp::ncols, and NULL.
Referenced by forkCreate(), and pseudoforkCreate().
◆ SCIPlpGetNNewcols()
| int SCIPlpGetNNewcols | ( | SCIP_LP * | lp | ) |
gets number of newly added columns after the last mark
- Parameters
-
lp current LP data
Definition at line 17270 of file lp.c.
References SCIP_Lp::firstnewcol, SCIP_Lp::ncols, and NULL.
Referenced by focusnodeCleanupVars(), focusnodeToFork(), focusnodeToJunction(), forkCreate(), pseudoforkCreate(), and SCIPnodeFocus().
◆ SCIPlpGetNewrows()
gets array with newly added rows after the last mark
- Parameters
-
lp current LP data
Definition at line 17281 of file lp.c.
References SCIP_Lp::firstnewrow, SCIP_Lp::nrows, NULL, and SCIP_Lp::rows.
Referenced by forkCreate(), and pseudoforkCreate().
◆ SCIPlpGetNNewrows()
| int SCIPlpGetNNewrows | ( | SCIP_LP * | lp | ) |
gets number of newly added rows after the last mark
- Parameters
-
lp current LP data
Definition at line 17292 of file lp.c.
References SCIP_Lp::firstnewrow, SCIP_Lp::nrows, and NULL.
Referenced by focusnodeToFork(), forkCreate(), pseudoforkCreate(), and SCIPnodeFocus().
◆ SCIPlpGetObjNorm()
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
- Parameters
-
lp LP data
Definition at line 17334 of file lp.c.
References NULL, SCIP_Lp::objsqrnorm, SCIP_Lp::objsqrnormunreliable, and SQRT.
Referenced by SCIPgetObjNorm().
◆ SCIPlpGetRootObjval()
gets the objective value of the root node LP; returns SCIP_INVALID if the root node LP was not (yet) solved
- Parameters
-
lp LP data
Definition at line 17367 of file lp.c.
References MIN, NULL, SCIP_Lp::rootlooseobjval, SCIP_Lp::rootlpobjval, and SCIP_INVALID.
Referenced by SCIPgetLPRootObjval().
◆ SCIPlpGetRootColumnObjval()
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
- Parameters
-
lp LP data
Definition at line 17379 of file lp.c.
References NULL, and SCIP_Lp::rootlpobjval.
Referenced by SCIPgetLPRootColumnObjval().
◆ SCIPlpGetRootLooseObjval()
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
- Parameters
-
lp LP data
Definition at line 17391 of file lp.c.
References NULL, and SCIP_Lp::rootlooseobjval.
Referenced by SCIPgetLPRootLooseObjval().
◆ SCIPlpGetLPI()
gets the LP solver interface
- Parameters
-
lp current LP data
Definition at line 17401 of file lp.c.
References SCIP_Lp::lpi, and NULL.
Referenced by conflictAnalyzeLP(), SCIPconflictAnalyzeLP(), SCIPgetLPI(), SCIPlpSolveAndEval(), SCIPprintLPSolutionQuality(), solveNodeLP(), undoBdchgsDualfarkas(), and undoBdchgsDualsol().
◆ SCIPlpSetIsRelax()
sets whether the current lp is a relaxation of the current problem and its optimal objective value is a local lower bound
sets whether the current LP is a relaxation of the current problem and its optimal objective value is a local lower bound
- Parameters
-
lp LP data relax is the current lp a relaxation?
Definition at line 17411 of file lp.c.
References SCIP_Lp::isrelax, and NULL.
Referenced by SCIPpriceLoop(), SCIPtreeEndProbing(), and solveProbingLP().
◆ SCIPlpIsRelax()
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?
- Parameters
-
lp LP data
Definition at line 17424 of file lp.c.
References SCIP_Lp::isrelax, and NULL.
Referenced by priceAndCutLoop(), propAndSolve(), SCIPendDive(), SCIPisLPRelax(), SCIPprobStoreRootSol(), SCIPtreeEndProbing(), solveNodeInitialLP(), and updateEstimate().
◆ SCIPlpIsSolved()
returns whether the current LP is flushed and solved
- Parameters
-
lp current LP data
Definition at line 17434 of file lp.c.
References SCIP_Lp::flushed, NULL, and SCIP_Lp::solved.
Referenced by priceAndCutLoop(), SCIPendDive(), SCIPlinkLPSol(), SCIPsolCreateLPSol(), and SCIPsolLinkCurrentSol().
◆ SCIPlpIsPrimalReliable()
return whether the current LP solution passed the primal feasibility check
- Parameters
-
lp current LP data
Definition at line 17444 of file lp.c.
References NULL, SCIP_Lp::primalchecked, and SCIP_Lp::primalfeasible.
Referenced by SCIPisLPPrimalReliable().
◆ SCIPlpIsDualReliable()
return whether the current LP solution passed the dual feasibility check
- Parameters
-
lp current LP data
Definition at line 17454 of file lp.c.
References SCIP_Lp::dualchecked, SCIP_Lp::dualfeasible, and NULL.
Referenced by analyzeStrongbranch(), SCIPisLPDualReliable(), and SCIPprobUpdateBestRootSol().
◆ SCIPlpIsSolBasic()
returns whether the current LP solution is a basic solution
- Parameters
-
lp current LP data
Definition at line 17464 of file lp.c.
References NULL, and SCIP_Lp::solisbasic.
Referenced by getImplVarRedcost(), SCIPgetLPBasisInd(), SCIPgetLPBInvACol(), SCIPgetLPBInvARow(), SCIPgetLPBInvCol(), SCIPgetLPBInvRow(), SCIPisLPSolBasic(), SCIPprobUpdateBestRootSol(), and SCIPvarGetImplRedcost().
◆ SCIPlpDiving()
returns whether the LP is in diving mode
- Parameters
-
lp current LP data
Definition at line 17474 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().
◆ SCIPlpDivingObjChanged()
returns whether the LP is in diving mode and the objective value of at least one column was changed
- Parameters
-
lp current LP data
Definition at line 17484 of file lp.c.
References SCIP_Lp::divingobjchg, and NULL.
Referenced by conflictAnalyzeBoundexceedingLP(), conflictAnalyzeInfeasibleLP(), conflictAnalyzeLP(), getFarkasProof(), runBoundHeuristic(), SCIPchgVarObjProbing(), SCIPlpSetCutoffbound(), SCIPsolLinkLPSol(), SCIPsolveDiveLP(), and SCIPtreeEndProbing().
◆ SCIPlpMarkDivingObjChanged()
| void SCIPlpMarkDivingObjChanged | ( | SCIP_LP * | lp | ) |
marks the diving LP to have a changed objective function
- Parameters
-
lp current LP data
Definition at line 17494 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::divingobjchg, NULL, SCIP_Lp::probing, and TRUE.
Referenced by SCIPchgVarObjDive(), SCIPchgVarObjProbing(), and SCIPpropagateProbing().
◆ SCIPlpUnmarkDivingObjChanged()
| void SCIPlpUnmarkDivingObjChanged | ( | SCIP_LP * | lp | ) |
marks the diving LP to not have a changed objective function anymore
- Parameters
-
lp current LP data
Definition at line 17505 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::divingobjchg, FALSE, NULL, and SCIP_Lp::probing.
Referenced by SCIPpropagateProbing(), and treeBacktrackProbing().
◆ SCIPlpDivingRowsChanged()
- Parameters
-
lp current LP data
Definition at line 17516 of file lp.c.
References SCIP_Lp::diving, SCIP_Lp::ndivechgsides, and NULL.
Referenced by SCIPsolveDiveLP().