branch_fullstrong.c File Reference

Detailed Description

full strong LP branching rule

Author

Tobias Achterberg

Gerald Gamrath

Definition in file branch_fullstrong.c.

#include "blockmemshell/memory.h"
#include "scip/branch_fullstrong.h"
#include "scip/pub_branch.h"
#include "scip/pub_message.h"
#include "scip/pub_tree.h"
#include "scip/pub_var.h"
#include "scip/scip_branch.h"
#include "scip/scip_exact.h"
#include "scip/scip_general.h"
#include "scip/scip_lp.h"
#include "scip/scip_mem.h"
#include "scip/scip_message.h"
#include "scip/scip_numerics.h"
#include "scip/scip_param.h"
#include "scip/scip_prob.h"
#include "scip/scip_solvingstats.h"
#include "scip/scip_tree.h"
#include "scip/scip_var.h"
#include <string.h>

Go to the source code of this file.

Macros
#define	BRANCHRULE_NAME   "fullstrong"
#define	BRANCHRULE_DESC   "full strong branching"
#define	BRANCHRULE_PRIORITY   0
#define	BRANCHRULE_MAXDEPTH   -1
#define	BRANCHRULE_MAXBOUNDDIST   1.0
#define	DEFAULT_REEVALAGE   10LL
#define	DEFAULT_MAXPROPROUNDS   -2
#define	DEFAULT_PROBINGBOUNDS   TRUE
#define	DEFAULT_FORCESTRONGBRANCH   FALSE

Functions
static	SCIP_DECL_BRANCHCOPY (branchCopyFullstrong)
static	SCIP_DECL_BRANCHFREE (branchFreeFullstrong)
static	SCIP_DECL_BRANCHINIT (branchInitFullstrong)
static	SCIP_DECL_BRANCHEXIT (branchExitFullstrong)
SCIP_RETCODE	SCIPselectVarStrongBranching (SCIP *scip, SCIP_VAR **lpcands, SCIP_Real *lpcandssol, SCIP_Real *lpcandsfrac, SCIP_Bool *skipdown, SCIP_Bool *skipup, int nlpcands, int npriolpcands, int ncomplete, int *start, int maxproprounds, SCIP_Bool probingbounds, SCIP_Bool forcestrongbranch, int *bestcand, SCIP_Real *bestdown, SCIP_Real *bestup, SCIP_Real *bestscore, SCIP_Bool *bestdownvalid, SCIP_Bool *bestupvalid, SCIP_Real *provedbound, SCIP_RESULT *result)
static	SCIP_DECL_BRANCHEXECLP (branchExeclpFullstrong)
SCIP_RETCODE	SCIPincludeBranchruleFullstrong (SCIP *scip)

Macro Definition Documentation

BRANCHRULE_NAME

#define BRANCHRULE_NAME   "fullstrong"

Definition at line 55 of file branch_fullstrong.c.

BRANCHRULE_DESC

#define BRANCHRULE_DESC   "full strong branching"

Definition at line 56 of file branch_fullstrong.c.

BRANCHRULE_PRIORITY

#define BRANCHRULE_PRIORITY   0

Definition at line 57 of file branch_fullstrong.c.

BRANCHRULE_MAXDEPTH

#define BRANCHRULE_MAXDEPTH   -1

Definition at line 58 of file branch_fullstrong.c.

BRANCHRULE_MAXBOUNDDIST

#define BRANCHRULE_MAXBOUNDDIST   1.0

Definition at line 59 of file branch_fullstrong.c.

DEFAULT_REEVALAGE

#define DEFAULT_REEVALAGE   10LL

number of intermediate LPs solved to trigger reevaluation of strong branching value for a variable that was already evaluated at the current node

Definition at line 62 of file branch_fullstrong.c.

DEFAULT_MAXPROPROUNDS

#define DEFAULT_MAXPROPROUNDS   -2

maximum number of propagation rounds to be performed during strong branching before solving the LP (-1: no limit, -2: parameter settings)

Definition at line 64 of file branch_fullstrong.c.

DEFAULT_PROBINGBOUNDS

#define DEFAULT_PROBINGBOUNDS   TRUE

should valid bounds be identified in a probing-like fashion during strong branching (only with propagation)?

Definition at line 66 of file branch_fullstrong.c.

DEFAULT_FORCESTRONGBRANCH

#define DEFAULT_FORCESTRONGBRANCH   FALSE

should strong branching be applied even if there is just a single candidate?

Definition at line 67 of file branch_fullstrong.c.

Function Documentation

SCIP_DECL_BRANCHCOPY()

static SCIP_DECL_BRANCHCOPY ( branchCopyFullstrong  )

static

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

Definition at line 93 of file branch_fullstrong.c.

References BRANCHRULE_NAME, NULL, SCIP_CALL, SCIP_OKAY, SCIPbranchruleGetName(), and SCIPincludeBranchruleFullstrong().

SCIP_DECL_BRANCHFREE()

static SCIP_DECL_BRANCHFREE ( branchFreeFullstrong  )

static

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

Definition at line 107 of file branch_fullstrong.c.

References NULL, SCIP_OKAY, SCIPbranchruleGetData(), SCIPbranchruleSetData(), SCIPfreeBlockMemory, and SCIPfreeBlockMemoryArrayNull.

SCIP_DECL_BRANCHINIT()

static SCIP_DECL_BRANCHINIT ( branchInitFullstrong  )

static

initialization method of branching rule (called after problem was transformed)

Definition at line 127 of file branch_fullstrong.c.

References NULL, SCIP_OKAY, and SCIPbranchruleGetData().

SCIP_DECL_BRANCHEXIT()

static SCIP_DECL_BRANCHEXIT ( branchExitFullstrong  )

static

deinitialization method of branching rule (called before transformed problem is freed)

Definition at line 142 of file branch_fullstrong.c.

References NULL, SCIP_OKAY, SCIPbranchruleGetData(), and SCIPfreeBlockMemoryArray.

SCIP_DECL_BRANCHEXECLP()

static SCIP_DECL_BRANCHEXECLP ( branchExeclpFullstrong  )

static

branching execution method for fractional LP solutions

Definition at line 544 of file branch_fullstrong.c.

References BMSclearMemoryArray, BRANCHRULE_NAME, NULL, SCIP_Bool, SCIP_BRANCHED, SCIP_CALL, SCIP_CONSADDED, SCIP_CUTOFF, SCIP_DIDNOTRUN, SCIP_OKAY, SCIP_Real, SCIP_REDUCEDDOM, SCIPallColsInLP(), SCIPallocBlockMemoryArray, SCIPbranchruleGetData(), SCIPbranchruleGetName(), SCIPbranchVarVal(), SCIPdebugMsg, SCIPduplicateBufferArray, SCIPfreeBufferArray, SCIPgetCutoffbound(), SCIPgetLPBranchCands(), SCIPgetNVars(), SCIPisExact(), SCIPisLT(), SCIPnodeGetLowerbound(), SCIPselectVarStrongBranching(), SCIPupdateLocalLowerbound(), SCIPupdateNodeLowerbound(), and SCIPvarGetName().