sepa_rapidlearning.c File Reference

Detailed Description

rapidlearning separator

Author

Timo Berthold

Definition in file sepa_rapidlearning.c.

#include <assert.h>
#include <string.h>
#include "scip/sepa_rapidlearning.h"
#include "scip/scipdefplugins.h"
#include "scip/pub_var.h"

Go to the source code of this file.

Macros
#define	SEPA_NAME   "rapidlearning"
#define	SEPA_DESC   "rapid learning heuristic and separator"
#define	SEPA_PRIORITY   -1200000
#define	SEPA_FREQ   -1
#define	SEPA_MAXBOUNDDIST   1.0
#define	SEPA_USESSUBSCIP   TRUE
#define	SEPA_DELAY   FALSE
#define	DEFAULT_APPLYCONFLICTS   TRUE
#define	DEFAULT_APPLYBDCHGS   TRUE
#define	DEFAULT_APPLYINFERVALS   TRUE
#define	DEFAULT_REDUCEDINFER   FALSE
#define	DEFAULT_APPLYPRIMALSOL   TRUE
#define	DEFAULT_APPLYSOLVED   TRUE
#define	DEFAULT_MAXNVARS   10000
#define	DEFAULT_MAXNCONSS   10000
#define	DEFAULT_MINNODES   500
#define	DEFAULT_MAXNODES   5000
#define	DEFAULT_CONTVARS   FALSE
#define	DEFAULT_CONTVARSQUOT   0.3
#define	DEFAULT_LPITERQUOT   0.2
#define	DEFAULT_COPYCUTS   TRUE

Functions
static SCIP_RETCODE	createNewSol (SCIP *scip, SCIP *subscip, SCIP_VAR **subvars, SCIP_HEUR *heur, SCIP_SOL *subsol, SCIP_Bool *success)
static	SCIP_DECL_SEPACOPY (sepaCopyRapidlearning)
static	SCIP_DECL_SEPAFREE (sepaFreeRapidlearning)
static SCIP_RETCODE	setupAndSolveSubscipRapidlearning (SCIP *scip, SCIP *subscip, SCIP_SEPADATA *sepadata, SCIP_RESULT *result)
static	SCIP_DECL_SEPAEXECLP (sepaExeclpRapidlearning)
SCIP_RETCODE	SCIPincludeSepaRapidlearning (SCIP *scip)

Macro Definition Documentation

SEPA_NAME

#define SEPA_NAME   "rapidlearning"

Definition at line 32 of file sepa_rapidlearning.c.

SEPA_DESC

#define SEPA_DESC   "rapid learning heuristic and separator"

Definition at line 33 of file sepa_rapidlearning.c.

SEPA_PRIORITY

#define SEPA_PRIORITY   -1200000

Definition at line 34 of file sepa_rapidlearning.c.

SEPA_FREQ

#define SEPA_FREQ   -1

Definition at line 35 of file sepa_rapidlearning.c.

SEPA_MAXBOUNDDIST

#define SEPA_MAXBOUNDDIST   1.0

Definition at line 36 of file sepa_rapidlearning.c.

SEPA_USESSUBSCIP

#define SEPA_USESSUBSCIP   TRUE

does the separator use a secondary SCIP instance?

Definition at line 37 of file sepa_rapidlearning.c.

SEPA_DELAY

#define SEPA_DELAY   FALSE

should separation method be delayed, if other separators found cuts?

Definition at line 38 of file sepa_rapidlearning.c.

DEFAULT_APPLYCONFLICTS

#define DEFAULT_APPLYCONFLICTS   TRUE

should the found conflicts be applied in the original SCIP?

Definition at line 40 of file sepa_rapidlearning.c.

DEFAULT_APPLYBDCHGS

#define DEFAULT_APPLYBDCHGS   TRUE

should the found global bound deductions be applied in the original SCIP? apply only if conflicts and incumbent solution will be copied too

Definition at line 41 of file sepa_rapidlearning.c.

DEFAULT_APPLYINFERVALS

#define DEFAULT_APPLYINFERVALS   TRUE

should the inference values be used as initialization in the original SCIP?

Definition at line 46 of file sepa_rapidlearning.c.

DEFAULT_REDUCEDINFER

#define DEFAULT_REDUCEDINFER   FALSE

should the inference values only be used when rapid learning found other reductions?

Definition at line 47 of file sepa_rapidlearning.c.

DEFAULT_APPLYPRIMALSOL

#define DEFAULT_APPLYPRIMALSOL   TRUE

should the incumbent solution be copied to the original SCIP?

Definition at line 48 of file sepa_rapidlearning.c.

DEFAULT_APPLYSOLVED

#define DEFAULT_APPLYSOLVED   TRUE

should a solved status be copied to the original SCIP?

Definition at line 49 of file sepa_rapidlearning.c.

DEFAULT_MAXNVARS

#define DEFAULT_MAXNVARS   10000

maximum problem size (variables) for which rapid learning will be called

Definition at line 51 of file sepa_rapidlearning.c.

DEFAULT_MAXNCONSS

#define DEFAULT_MAXNCONSS   10000

maximum problem size (constraints) for which rapid learning will be called

Definition at line 52 of file sepa_rapidlearning.c.

DEFAULT_MINNODES

#define DEFAULT_MINNODES   500

minimum number of nodes considered in rapid learning run

Definition at line 54 of file sepa_rapidlearning.c.

DEFAULT_MAXNODES

#define DEFAULT_MAXNODES   5000

maximum number of nodes considered in rapid learning run

Definition at line 55 of file sepa_rapidlearning.c.

DEFAULT_CONTVARS

#define DEFAULT_CONTVARS   FALSE

should rapid learning be applied when there are continuous variables?

Definition at line 57 of file sepa_rapidlearning.c.

DEFAULT_CONTVARSQUOT

#define DEFAULT_CONTVARSQUOT   0.3

maximal portion of continuous variables to apply rapid learning

Definition at line 58 of file sepa_rapidlearning.c.

DEFAULT_LPITERQUOT

#define DEFAULT_LPITERQUOT   0.2

maximal fraction of LP iterations compared to node LP iterations

Definition at line 59 of file sepa_rapidlearning.c.

DEFAULT_COPYCUTS

#define DEFAULT_COPYCUTS   TRUE

should all active cuts from the cutpool of the original scip be copied to constraints of the subscip

Definition at line 60 of file sepa_rapidlearning.c.

Function Documentation

createNewSol()

static SCIP_RETCODE createNewSol ( SCIP *  scip, SCIP *  subscip, SCIP_VAR **  subvars, SCIP_HEUR *  heur, SCIP_SOL *  subsol, SCIP_Bool *  success  )

static

creates a new solution for the original problem by copying the solution of the subproblem

Parameters

scip	original SCIP data structure
subscip	SCIP structure of the subproblem
subvars	the variables of the subproblem
heur	trysol heuristic structure
subsol	solution of the subproblem
success	used to store whether new solution was found or not

Definition at line 94 of file sepa_rapidlearning.c.

References FALSE, NULL, SCIP_CALL, SCIP_DECL_SEPACOPY(), SCIP_OKAY, SCIP_Real, SCIPallocBufferArray, SCIPcreateSol(), SCIPfreeBufferArray, SCIPgetNOrigVars(), SCIPgetSolVals(), SCIPgetVarsData(), SCIPsetSolVals(), SCIPtrySolFree(), and TRUE.

Referenced by setupAndSolveSubscipRapidlearning().

SCIP_DECL_SEPACOPY()

static SCIP_DECL_SEPACOPY ( sepaCopyRapidlearning  )

static

copy method for separator plugins (called when SCIP copies plugins)

Definition at line 145 of file sepa_rapidlearning.c.

Referenced by createNewSol().

SCIP_DECL_SEPAFREE()

static SCIP_DECL_SEPAFREE ( sepaFreeRapidlearning  )

static

destructor of separator to free user data (called when SCIP is exiting)

Definition at line 159 of file sepa_rapidlearning.c.

setupAndSolveSubscipRapidlearning()

static SCIP_RETCODE setupAndSolveSubscipRapidlearning ( SCIP *  scip, SCIP *  subscip, SCIP_SEPADATA *  sepadata, SCIP_RESULT *  result  )

static

setup and solve sub-SCIP

Parameters

scip	SCIP data structure
subscip	subSCIP data structure
sepadata	separator data
result	result pointer

Definition at line 179 of file sepa_rapidlearning.c.

References createNewSol(), FALSE, MAX, MIN, NULL, SCIP_Bool, SCIP_BRANCHDIR_DOWNWARDS, SCIP_BRANCHDIR_UPWARDS, SCIP_CALL, SCIP_CALL_ABORT, SCIP_CONSADDED, SCIP_DECL_SEPAEXECLP(), SCIP_LOCKTYPE_MODEL, SCIP_Longint, SCIP_LONGINT_FORMAT, SCIP_OKAY, SCIP_PARAMSETTING_FAST, SCIP_PARAMSETTING_OFF, SCIP_Real, SCIP_REDUCEDDOM, SCIP_STAGE_SOLVED, SCIP_STATUS_INFEASIBLE, SCIP_STATUS_OPTIMAL, SCIP_VARTYPE_IMPLINT, SCIP_VARTYPE_INTEGER, SCIPaddCons(), SCIPaddVarLocksType(), SCIPallocBufferArray, SCIPblkmem(), SCIPchgVarType(), SCIPconsGetName(), SCIPconshdlrGetConss(), SCIPconshdlrGetNConss(), SCIPconsIsChecked(), SCIPconsIsDynamic(), SCIPconsIsEnforced(), SCIPconsIsInitial(), SCIPconsIsPropagated(), SCIPconsIsRemovable(), SCIPconsIsSeparated(), SCIPcopyConsCompression(), SCIPcopyCuts(), SCIPcopyLimits(), SCIPdebugMsg, SCIPfindConshdlr(), SCIPfindHeur(), SCIPfreeBufferArray, SCIPfreeTransform(), SCIPgetConsCopy(), SCIPgetDepth(), SCIPgetDualbound(), SCIPgetNConflictConssApplied(), SCIPgetNConflictConssFound(), SCIPgetNFixedVars(), SCIPgetNLPIterations(), SCIPgetNSols(), SCIPgetSolOrigObj(), SCIPgetSols(), SCIPgetStage(), SCIPgetStatus(), SCIPgetUpperbound(), SCIPgetVarAvgConflictlength(), SCIPgetVarAvgInferences(), SCIPgetVarsData(), SCIPgetVarVSIDS(), SCIPhashmapCreate(), SCIPhashmapFree(), SCIPhashmapGetImage(), SCIPhashmapInsert(), SCIPinitVarBranchStats(), SCIPisEQ(), SCIPisFeasLE(), SCIPisFeasLT(), SCIPisInfinity(), SCIPisLE(), SCIPisNegative(), SCIPisParamFixed(), SCIPisPositive(), SCIPpresolve(), SCIPprintStatistics(), SCIPreleaseCons(), SCIPretransformObj(), SCIPsetBoolParam(), SCIPsetIntParam(), SCIPsetLongintParam(), SCIPsetObjlimit(), SCIPsetPresolving(), SCIPsetRealParam(), SCIPsetSeparating(), SCIPsetSubscipsOff(), SCIPsolve(), SCIPtightenVarLb(), SCIPtightenVarUb(), SCIPtransformProb(), SCIPunfixParam(), SCIPupdateLocalDualbound(), SCIPvarGetLbGlobal(), SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetObj(), SCIPvarGetTransVar(), SCIPvarGetType(), SCIPvarGetUbGlobal(), SCIPvarGetUbLocal(), SCIPwarningMessage(), and TRUE.

SCIP_DECL_SEPAEXECLP()

static SCIP_DECL_SEPAEXECLP ( sepaExeclpRapidlearning  )

static

LP solution separation method of separator

Definition at line 645 of file sepa_rapidlearning.c.

Referenced by setupAndSolveSubscipRapidlearning().