Detailed Description

methods and datastructures for relaxation handlers

Author: Tobias Achterberg; Timo Berthold

Definition in file relax.c.

#include <assert.h>
#include <string.h>
#include "scip/def.h"
#include "scip/set.h"
#include "scip/tree.h"
#include "scip/stat.h"
#include "scip/clock.h"
#include "scip/paramset.h"
#include "scip/scip.h"
#include "scip/sol.h"
#include "scip/var.h"
#include "scip/relax.h"
#include "scip/pub_message.h"
#include "scip/pub_misc.h"
#include "scip/struct_relax.h"

Go to the source code of this file.

Functions
	SCIP_DECL_SORTPTRCOMP (SCIPrelaxComp)

	SCIP_DECL_SORTPTRCOMP (SCIPrelaxCompName)

static	SCIP_DECL_PARAMCHGD (paramChgdRelaxPriority)

SCIP_RETCODE	SCIPrelaxCopyInclude (SCIP_RELAX relax, SCIP_SET set)

static SCIP_RETCODE	doRelaxCreate (SCIP_RELAX *relax, SCIP_SET set, SCIP_MESSAGEHDLR messagehdlr, BMS_BLKMEM blkmem, const char name, const char desc, int priority, int freq, SCIP_DECL_RELAXCOPY((relaxcopy)), SCIP_DECL_RELAXFREE((relaxfree)), SCIP_DECL_RELAXINIT((relaxinit)), SCIP_DECL_RELAXEXIT((relaxexit)), SCIP_DECL_RELAXINITSOL((relaxinitsol)), SCIP_DECL_RELAXEXITSOL((relaxexitsol)), SCIP_DECL_RELAXEXEC((relaxexec)), SCIP_RELAXDATA relaxdata)

SCIP_RETCODE	SCIPrelaxCreate (SCIP_RELAX *relax, SCIP_SET set, SCIP_MESSAGEHDLR messagehdlr, BMS_BLKMEM blkmem, const char name, const char desc, int priority, int freq, SCIP_DECL_RELAXCOPY((relaxcopy)), SCIP_DECL_RELAXFREE((relaxfree)), SCIP_DECL_RELAXINIT((relaxinit)), SCIP_DECL_RELAXEXIT((relaxexit)), SCIP_DECL_RELAXINITSOL((relaxinitsol)), SCIP_DECL_RELAXEXITSOL((relaxexitsol)), SCIP_DECL_RELAXEXEC((relaxexec)), SCIP_RELAXDATA relaxdata)

SCIP_RETCODE	SCIPrelaxFree (SCIP_RELAX *relax, SCIP_SET set)

SCIP_RETCODE	SCIPrelaxInit (SCIP_RELAX relax, SCIP_SET set)

SCIP_RETCODE	SCIPrelaxExit (SCIP_RELAX relax, SCIP_SET set)

SCIP_RETCODE	SCIPrelaxInitsol (SCIP_RELAX relax, SCIP_SET set)

SCIP_RETCODE	SCIPrelaxExitsol (SCIP_RELAX relax, SCIP_SET set)

SCIP_RETCODE	SCIPrelaxExec (SCIP_RELAX relax, SCIP_SET set, SCIP_TREE tree, SCIP_STAT stat, int depth, SCIP_Real lowerbound, SCIP_RESULT result)

SCIP_RELAXDATA *	SCIPrelaxGetData (SCIP_RELAX *relax)

void	SCIPrelaxSetData (SCIP_RELAX relax, SCIP_RELAXDATA relaxdata)

void	SCIPrelaxSetCopy (SCIP_RELAX relax, SCIP_DECL_RELAXCOPY((relaxcopy)))

void	SCIPrelaxSetFree (SCIP_RELAX relax, SCIP_DECL_RELAXFREE((relaxfree)))

void	SCIPrelaxSetInit (SCIP_RELAX relax, SCIP_DECL_RELAXINIT((relaxinit)))

void	SCIPrelaxSetExit (SCIP_RELAX relax, SCIP_DECL_RELAXEXIT((relaxexit)))

void	SCIPrelaxSetInitsol (SCIP_RELAX relax, SCIP_DECL_RELAXINITSOL((relaxinitsol)))

void	SCIPrelaxSetExitsol (SCIP_RELAX relax, SCIP_DECL_RELAXEXITSOL((relaxexitsol)))

const char *	SCIPrelaxGetName (SCIP_RELAX *relax)

const char *	SCIPrelaxGetDesc (SCIP_RELAX *relax)

int	SCIPrelaxGetPriority (SCIP_RELAX *relax)

void	SCIPrelaxSetPriority (SCIP_RELAX relax, SCIP_SET set, int priority)

int	SCIPrelaxGetFreq (SCIP_RELAX *relax)

SCIP_Real	SCIPrelaxGetSetupTime (SCIP_RELAX *relax)

void	SCIPrelaxEnableOrDisableClocks (SCIP_RELAX *relax, SCIP_Bool enable)

SCIP_Real	SCIPrelaxGetTime (SCIP_RELAX *relax)

SCIP_Longint	SCIPrelaxGetNCalls (SCIP_RELAX *relax)

SCIP_Longint	SCIPrelaxGetNCutoffs (SCIP_RELAX *relax)

SCIP_Longint	SCIPrelaxGetNImprovedLowerbound (SCIP_RELAX *relax)

SCIP_Longint	SCIPrelaxGetNAddedConss (SCIP_RELAX *relax)

SCIP_Real	SCIPrelaxGetImprovedLowerboundTime (SCIP_RELAX *relax)

SCIP_Longint	SCIPrelaxGetNReducedDomains (SCIP_RELAX *relax)

SCIP_Longint	SCIPrelaxGetNSeparatedCuts (SCIP_RELAX *relax)

SCIP_Bool	SCIPrelaxIsInitialized (SCIP_RELAX *relax)

SCIP_Bool	SCIPrelaxIsSolved (SCIP_RELAX relax, SCIP_STAT stat)

void	SCIPrelaxMarkUnsolved (SCIP_RELAX *relax)

SCIP_RETCODE	SCIPrelaxationCreate (SCIP_RELAXATION *relaxation, BMS_BLKMEM blkmem, SCIP_SET set, SCIP_STAT stat, SCIP_PRIMAL primal, SCIP_TREE tree)

SCIP_RETCODE	SCIPrelaxationFree (SCIP_RELAXATION **relaxation)

void	SCIPrelaxationSetSolZero (SCIP_RELAXATION *relaxation, SCIP_Bool iszero)

SCIP_Bool	SCIPrelaxationIsSolZero (SCIP_RELAXATION *relaxation)

void	SCIPrelaxationSetSolValid (SCIP_RELAXATION *relaxation, SCIP_Bool isvalid, SCIP_Bool includeslp)

SCIP_Bool	SCIPrelaxationIsSolValid (SCIP_RELAXATION *relaxation)

SCIP_Bool	SCIPrelaxationIsLpIncludedForSol (SCIP_RELAXATION *relaxation)

void	SCIPrelaxationSetSolObj (SCIP_RELAXATION *relaxation, SCIP_Real obj)

SCIP_Real	SCIPrelaxationGetSolObj (SCIP_RELAXATION *relaxation)

void	SCIPrelaxationSolObjAdd (SCIP_RELAXATION *relaxation, SCIP_Real val)

void	SCIPrelaxationUpdateVarObj (SCIP_RELAXATION relaxation, SCIP_SET set, SCIP_VAR *var, SCIP_Real oldobj, SCIP_Real newobj)

void	SCIPrelaxationSetSolRelax (SCIP_RELAXATION relaxation, SCIP_RELAX relax)

SCIP_RELAX *	SCIPrelaxationGetSolRelax (SCIP_RELAXATION *relaxation)

Function Documentation

◆ SCIP_DECL_PARAMCHGD()

static SCIP_DECL_PARAMCHGD ( paramChgdRelaxPriority )

static

method to call, when the priority of a relaxation handler was changed

Definition at line 59 of file relax.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPparamGetData(), SCIPparamGetInt(), and SCIPsetRelaxPriority().

◆ SCIPrelaxCopyInclude()

SCIP_RETCODE SCIPrelaxCopyInclude	(	SCIP_RELAX *	relax,
		SCIP_SET *	set
	)

copies the given relaxation handler to a new scip

Parameters

relax	relaxation handler
set	SCIP_SET of SCIP to copy to

Definition at line 73 of file relax.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPrelaxGetName(), and SCIPsetDebugMsg.

Referenced by SCIPsetCopyPlugins().

◆ doRelaxCreate()

static SCIP_RETCODE doRelaxCreate	(	SCIP_RELAX **	relax,
		SCIP_SET *	set,
		SCIP_MESSAGEHDLR *	messagehdlr,
		BMS_BLKMEM *	blkmem,
		const char *	name,
		const char *	desc,
		int	priority,
		int	freq,
		SCIP_DECL_RELAXCOPY((*relaxcopy))	,
		SCIP_DECL_RELAXFREE((*relaxfree))	,
		SCIP_DECL_RELAXINIT((*relaxinit))	,
		SCIP_DECL_RELAXEXIT((*relaxexit))	,
		SCIP_DECL_RELAXINITSOL((*relaxinitsol))	,
		SCIP_DECL_RELAXEXITSOL((*relaxexitsol))	,
		SCIP_DECL_RELAXEXEC((*relaxexec))	,
		SCIP_RELAXDATA *	relaxdata
	)

static

internal method for creating a relaxation handler

Parameters

relax	pointer to relaxation handler data structure
set	global SCIP settings
messagehdlr	message handler
blkmem	block memory for parameter settings
name	name of relaxation handler
desc	description of relaxation handler
priority	priority of the relaxation handler (negative: after LP, non-negative: before LP)
freq	frequency for calling relaxation handler
relaxdata	relaxation handler data

Definition at line 92 of file relax.c.

References BMSallocMemory, BMSclearMemory, BMSduplicateMemoryArray, FALSE, NULL, paramname, SCIP_ALLOC, SCIP_CALL, SCIP_CLOCKTYPE_DEFAULT, SCIP_MAXSTRLEN, SCIP_MAXTREEDEPTH, SCIP_OKAY, SCIPclockCreate(), SCIPsetAddIntParam(), and SCIPsnprintf().

Referenced by SCIPrelaxCreate().

◆ SCIPrelaxCreate()

SCIP_RETCODE SCIPrelaxCreate	(	SCIP_RELAX **	relax,
		SCIP_SET *	set,
		SCIP_MESSAGEHDLR *	messagehdlr,
		BMS_BLKMEM *	blkmem,
		const char *	name,
		const char *	desc,
		int	priority,
		int	freq,
		SCIP_DECL_RELAXCOPY((*relaxcopy))	,
		SCIP_DECL_RELAXFREE((*relaxfree))	,
		SCIP_DECL_RELAXINIT((*relaxinit))	,
		SCIP_DECL_RELAXEXIT((*relaxexit))	,
		SCIP_DECL_RELAXINITSOL((*relaxinitsol))	,
		SCIP_DECL_RELAXEXITSOL((*relaxexitsol))	,
		SCIP_DECL_RELAXEXEC((*relaxexec))	,
		SCIP_RELAXDATA *	relaxdata
	)

creates a relaxation handler

Parameters

relax	pointer to relaxation handler data structure
set	global SCIP settings
messagehdlr	message handler
blkmem	block memory for parameter settings
name	name of relaxation handler
desc	description of relaxation handler
priority	priority of the relaxation handler (negative: after LP, non-negative: before LP)
freq	frequency for calling relaxation handler
relaxdata	relaxation handler data

Definition at line 162 of file relax.c.

References doRelaxCreate(), NULL, SCIP_CALL_FINALLY, SCIP_OKAY, and SCIPrelaxFree().

Referenced by SCIPincludeRelax(), and SCIPincludeRelaxBasic().

◆ SCIPrelaxFree()

SCIP_RETCODE SCIPrelaxFree	(	SCIP_RELAX **	relax,
		SCIP_SET *	set
	)

calls destructor and frees memory of relaxation handler

Parameters

relax	pointer to relaxation handler data structure
set	global SCIP settings

Definition at line 194 of file relax.c.

References BMSfreeMemory, BMSfreeMemoryArrayNull, NULL, SCIP_CALL, SCIP_OKAY, and SCIPclockFree().

Referenced by SCIPrelaxCreate().

◆ SCIPrelaxInit()

SCIP_RETCODE SCIPrelaxInit	(	SCIP_RELAX *	relax,
		SCIP_SET *	set
	)

initializes relaxation handler

Parameters

relax	relaxation handler
set	global SCIP settings

Definition at line 221 of file relax.c.

References SCIP_Relax::imprtime, SCIP_Relax::initialized, SCIP_Relax::lastsolvednode, SCIP_Relax::naddedconss, SCIP_Relax::name, SCIP_Relax::ncalls, SCIP_Relax::ncutoffs, SCIP_Relax::nimprbounds, SCIP_Relax::nreduceddom, SCIP_Relax::nseparated, NULL, SCIP_Relax::relaxclock, SCIP_CALL, SCIP_INVALIDCALL, SCIP_OKAY, SCIPclockReset(), SCIPclockStart(), SCIPclockStop(), SCIPerrorMessage, SCIP_Relax::setuptime, and TRUE.

◆ SCIPrelaxExit()

SCIP_RETCODE SCIPrelaxExit	(	SCIP_RELAX *	relax,
		SCIP_SET *	set
	)

calls exit method of relaxation handler

Parameters

relax	relaxation handler
set	global SCIP settings

Definition at line 265 of file relax.c.

References FALSE, SCIP_Relax::initialized, SCIP_Relax::name, NULL, SCIP_CALL, SCIP_INVALIDCALL, SCIP_OKAY, SCIPclockStart(), SCIPclockStop(), SCIPerrorMessage, and SCIP_Relax::setuptime.

Referenced by SCIPsetInitPlugins().

◆ SCIPrelaxInitsol()

SCIP_RETCODE SCIPrelaxInitsol	(	SCIP_RELAX *	relax,
		SCIP_SET *	set
	)

informs relaxation handler that the branch and bound process is being started

Parameters

relax	relaxation handler
set	global SCIP settings

Definition at line 295 of file relax.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPclockStart(), SCIPclockStop(), and SCIP_Relax::setuptime.

Referenced by SCIPsetExitprePlugins().

◆ SCIPrelaxExitsol()

SCIP_RETCODE SCIPrelaxExitsol	(	SCIP_RELAX *	relax,
		SCIP_SET *	set
	)

informs relaxation handler that the branch and bound process data is being freed

Parameters

relax	relaxation handler
set	global SCIP settings

Definition at line 319 of file relax.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPclockStart(), SCIPclockStop(), and SCIP_Relax::setuptime.

Referenced by SCIPsetInitsolPlugins().

◆ SCIPrelaxExec()

SCIP_RETCODE SCIPrelaxExec	(	SCIP_RELAX *	relax,
		SCIP_SET *	set,
		SCIP_TREE *	tree,
		SCIP_STAT *	stat,
		int	depth,
		SCIP_Real *	lowerbound,
		SCIP_RESULT *	result
	)

calls execution method of relaxation handler

Parameters

relax	relaxation handler
set	global SCIP settings
tree	branch and bound tree
stat	dynamic problem statistics
depth	depth of current node
lowerbound	pointer to lower bound computed by the relaxation handler
result	pointer to store the result of the callback method

Definition at line 343 of file relax.c.

References SCIP_Relax::freq, SCIP_Relax::imprtime, SCIP_Relax::lastsolvednode, SCIP_Relax::naddedconss, SCIP_Relax::name, SCIP_Relax::ncalls, SCIP_Relax::ncutoffs, SCIP_Relax::nimprbounds, SCIP_Relax::nreduceddom, SCIP_Relax::nseparated, SCIP_Stat::ntotalnodes, NULL, SCIP_Relax::relaxclock, SCIP_Stat::relaxcount, SCIP_CALL, SCIP_CONSADDED, SCIP_CUTOFF, SCIP_DIDNOTRUN, SCIP_INVALIDRESULT, SCIP_OKAY, SCIP_Real, SCIP_REDUCEDDOM, SCIP_SEPARATED, SCIP_SUCCESS, SCIP_SUSPENDED, SCIPclockGetTime(), SCIPclockStart(), SCIPclockStop(), SCIPerrorMessage, SCIPinProbing(), SCIPnodeGetLowerbound(), SCIPrelaxMarkUnsolved(), SCIPsetDebugMsg, SCIPsetInfinity(), SCIPsetIsInfinity(), SCIPsetIsRelGT(), and SCIPtreeGetCurrentNode().

Referenced by SCIPsolveProbingRelax(), and solveNodeRelax().

◆ SCIPrelaxSetCopy()

void SCIPrelaxSetCopy	(	SCIP_RELAX *	relax,
		SCIP_DECL_RELAXCOPY((*relaxcopy))
	)

set copy method of relaxation handler

Parameters

relax relaxation handler

Definition at line 461 of file relax.c.

References NULL.

Referenced by SCIPsetRelaxCopy().

◆ SCIPrelaxSetFree()

void SCIPrelaxSetFree	(	SCIP_RELAX *	relax,
		SCIP_DECL_RELAXFREE((*relaxfree))
	)

set destructor of relaxation handler

Parameters

relax relaxation handler

Definition at line 472 of file relax.c.

References NULL.

Referenced by SCIPsetRelaxFree().

◆ SCIPrelaxSetInit()

void SCIPrelaxSetInit	(	SCIP_RELAX *	relax,
		SCIP_DECL_RELAXINIT((*relaxinit))
	)

set initialization method of relaxation handler

Parameters

relax relaxation handler

Definition at line 483 of file relax.c.

References NULL.

Referenced by SCIPsetRelaxInit().

◆ SCIPrelaxSetExit()

void SCIPrelaxSetExit	(	SCIP_RELAX *	relax,
		SCIP_DECL_RELAXEXIT((*relaxexit))
	)

set deinitialization method of relaxation handler

Parameters

relax relaxation handler

Definition at line 494 of file relax.c.

References NULL.

Referenced by SCIPsetRelaxExit().

◆ SCIPrelaxSetInitsol()

void SCIPrelaxSetInitsol	(	SCIP_RELAX *	relax,
		SCIP_DECL_RELAXINITSOL((*relaxinitsol))
	)

set solving process initialization method of relaxation handler

Parameters

relax relaxation handler

Definition at line 505 of file relax.c.

References NULL.

Referenced by SCIPsetRelaxInitsol().

◆ SCIPrelaxSetExitsol()

void SCIPrelaxSetExitsol	(	SCIP_RELAX *	relax,
		SCIP_DECL_RELAXEXITSOL((*relaxexitsol))
	)

set solving process deinitialization method of relaxation handler

Parameters

relax relaxation handler

Definition at line 516 of file relax.c.

References NULL.

Referenced by SCIPsetRelaxExitsol().

◆ SCIPrelaxSetPriority()

void SCIPrelaxSetPriority	(	SCIP_RELAX *	relax,
		SCIP_SET *	set,
		int	priority
	)

sets priority of relaxation handler

Parameters

relax	relaxation handler
set	global SCIP settings
priority	new priority of the relaxation handler

Definition at line 557 of file relax.c.

References FALSE, NULL, and SCIP_Relax::priority.

Referenced by SCIPsetRelaxPriority().

◆ SCIPrelaxEnableOrDisableClocks()

void SCIPrelaxEnableOrDisableClocks	(	SCIP_RELAX *	relax,
		SCIP_Bool	enable
	)

enables or disables all clocks of relax, depending on the value of the flag

Parameters

relax	the relaxation handler for which all clocks should be enabled or disabled
enable	should the clocks of the relaxation handler be enabled?

Definition at line 591 of file relax.c.

References NULL, SCIP_Relax::relaxclock, SCIPclockEnableOrDisable(), and SCIP_Relax::setuptime.

◆ SCIPrelaxIsSolved()

SCIP_Bool SCIPrelaxIsSolved	(	SCIP_RELAX *	relax,
		SCIP_STAT *	stat
	)

returns whether the relaxation was completely solved at the current node

Parameters

relax	relaxation handler
stat	dynamic problem statistics

Definition at line 693 of file relax.c.

References SCIP_Relax::lastsolvednode, SCIP_Stat::ntotalnodes, and NULL.

Referenced by updateLoopStatus().

◆ SCIPrelaxationCreate()

SCIP_RETCODE SCIPrelaxationCreate	(	SCIP_RELAXATION **	relaxation,
		BMS_BLKMEM *	blkmem,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_PRIMAL *	primal,
		SCIP_TREE *	tree
	)

creates global relaxation data

Parameters

relaxation	global relaxation data
blkmem	block memory
set	global SCIP settings
stat	problem statistics data
primal	primal data
tree	branch and bound tree

Definition at line 719 of file relax.c.

References BMSallocMemory, FALSE, NULL, SCIP_ALLOC, SCIP_OKAY, and TRUE.

Referenced by prepareReoptimization(), and SCIPtransformProb().

◆ SCIPrelaxationFree()

SCIP_RETCODE SCIPrelaxationFree ( SCIP_RELAXATION ** relaxation )

frees global relaxation data

Parameters

relaxation global relaxation data

Definition at line 747 of file relax.c.

References BMSfreeMemory, NULL, and SCIP_OKAY.

Referenced by freeReoptSolve(), freeTransform(), and freeTransforming().

◆ SCIPrelaxationSetSolZero()

void SCIPrelaxationSetSolZero	(	SCIP_RELAXATION *	relaxation,
		SCIP_Bool	iszero
	)

sets the relaxsolzero flag in the relaxation data to the given value

Parameters

relaxation	global relaxation data
iszero	are all values of the relaxation solution set to zero?

Definition at line 759 of file relax.c.

References NULL, and SCIP_Relaxation::relaxsolzero.

Referenced by SCIPclearRelaxSolVals(), SCIPsetRelaxSolVal(), SCIPsetRelaxSolVals(), and SCIPsetRelaxSolValsSol().

◆ SCIPrelaxationIsSolZero()

SCIP_Bool SCIPrelaxationIsSolZero ( SCIP_RELAXATION * relaxation )

returns whether the global relaxation solution is cleared and all values are set to zero

Parameters

relaxation global relaxation data

Definition at line 770 of file relax.c.

References NULL, and SCIP_Relaxation::relaxsolzero.

Referenced by SCIPclearRelaxSolVals().

◆ SCIPrelaxationSetSolValid()

void SCIPrelaxationSetSolValid	(	SCIP_RELAXATION *	relaxation,
		SCIP_Bool	isvalid,
		SCIP_Bool	includeslp
	)

sets the relaxsolvalid and includeslp flags in the relaxation data to the given values

Parameters

relaxation	global relaxation data
isvalid	is the stored solution valid?
includeslp	does the relaxator contain all cuts in the LP?

Definition at line 780 of file relax.c.

References NULL, SCIP_Relaxation::relaxsolincludeslp, and SCIP_Relaxation::relaxsolvalid.

Referenced by markRelaxsUnsolved(), SCIPmarkRelaxSolInvalid(), SCIPmarkRelaxSolValid(), SCIPsetRelaxSolVal(), SCIPsetRelaxSolVals(), SCIPsetRelaxSolValsSol(), SCIPtreeRestoreRelaxSol(), and solveNode().

◆ SCIPrelaxationIsSolValid()

SCIP_Bool SCIPrelaxationIsSolValid ( SCIP_RELAXATION * relaxation )

returns whether the global relaxation solution is valid

Parameters

relaxation global relaxation data

Definition at line 793 of file relax.c.

References NULL, and SCIP_Relaxation::relaxsolvalid.

Referenced by addCurrentSolution(), enforceConstraints(), SCIPcreateRelaxSol(), SCIPgetRelaxSolObj(), SCIPgetRelaxSolVal(), SCIPisRelaxSolValid(), SCIPlinkRelaxSol(), SCIPsolCreateRelaxSol(), SCIPsolLinkRelaxSol(), SCIPsolveCIP(), SCIPtreeStartProbing(), SCIPtreeStoreRelaxSol(), and solveNode().

◆ SCIPrelaxationIsLpIncludedForSol()

SCIP_Bool SCIPrelaxationIsLpIncludedForSol ( SCIP_RELAXATION * relaxation )

returns whether the global relaxation solution was computed by a relaxator which included all LP cuts

Parameters

relaxation global relaxation data

Definition at line 803 of file relax.c.

References NULL, and SCIP_Relaxation::relaxsolincludeslp.

Referenced by addCurrentSolution(), enforceConstraints(), SCIPsolveCIP(), SCIPtreeStoreRelaxSol(), and solveNode().

◆ SCIPrelaxationSetSolObj()

void SCIPrelaxationSetSolObj	(	SCIP_RELAXATION *	relaxation,
		SCIP_Real	obj
	)

sets the objective value of the global relaxation solution

Parameters

relaxation	global relaxation data
obj	objective value

Definition at line 813 of file relax.c.

References NULL, and SCIP_Relaxation::relaxsolobjval.

Referenced by SCIPclearRelaxSolVals(), and SCIPsetRelaxSolValsSol().

◆ SCIPrelaxationGetSolObj()

SCIP_Real SCIPrelaxationGetSolObj ( SCIP_RELAXATION * relaxation )

returns the objective value of the global relaxation solution w.r.t. the transformed problem

Parameters

relaxation global relaxation data

Definition at line 824 of file relax.c.

References NULL, and SCIP_Relaxation::relaxsolobjval.

Referenced by addCurrentSolution(), enforceConstraints(), SCIPgetRelaxSolObj(), SCIPsolLinkRelaxSol(), SCIPsolveCIP(), and solveNode().

◆ SCIPrelaxationSolObjAdd()

void SCIPrelaxationSolObjAdd	(	SCIP_RELAXATION *	relaxation,
		SCIP_Real	val
	)

adds the given value to the global relaxation solution's objective value

Parameters

relaxation	global relaxation data
val	value to add to the objective value

Definition at line 834 of file relax.c.

References NULL, and SCIP_Relaxation::relaxsolobjval.

Referenced by SCIPvarSetRelaxSol().

◆ SCIPrelaxationUpdateVarObj()

void SCIPrelaxationUpdateVarObj	(	SCIP_RELAXATION *	relaxation,
		SCIP_SET *	set,
		SCIP_VAR *	var,
		SCIP_Real	oldobj,
		SCIP_Real	newobj
	)

updates objective value of current relaxation solution after change of objective coefficient

Parameters

relaxation	global relaxation data
set	global SCIP settings
var	variable with changed objective coefficient
oldobj	old objective coefficient
newobj	new objective coefficient

Definition at line 845 of file relax.c.

References NULL, SCIP_Relaxation::relaxsolobjval, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPvarGetRelaxSol(), and SCIPvarGetStatus().

◆ SCIPrelaxationSetSolRelax()

void SCIPrelaxationSetSolRelax	(	SCIP_RELAXATION *	relaxation,
		SCIP_RELAX *	relax
	)

store the most recent relaxation handler relax responsible for the solution

Parameters

relaxation	global relaxation data
relax	responsible relaxation handler, or NULL

Definition at line 865 of file relax.c.

References SCIP_Relaxation::lastsolrelax, and NULL.

Referenced by SCIPclearRelaxSolVals(), SCIPmarkRelaxSolValid(), SCIPsetRelaxSolVal(), SCIPsetRelaxSolVals(), and SCIPsetRelaxSolValsSol().

◆ SCIPrelaxationGetSolRelax()

SCIP_RELAX* SCIPrelaxationGetSolRelax ( SCIP_RELAXATION * relaxation )

returns the most recent relaxation handler responsible for the solution, or NULL if unspecified

Parameters

relaxation global relaxation data

Definition at line 876 of file relax.c.

References SCIP_Relaxation::lastsolrelax, and NULL.

Referenced by SCIPsolCreateRelaxSol().

SCIP

Detailed Description

Functions

Function Documentation

◆ SCIP_DECL_PARAMCHGD()

◆ SCIPrelaxCopyInclude()

◆ doRelaxCreate()

◆ SCIPrelaxCreate()

◆ SCIPrelaxFree()

◆ SCIPrelaxInit()

◆ SCIPrelaxExit()

◆ SCIPrelaxInitsol()

◆ SCIPrelaxExitsol()

◆ SCIPrelaxExec()

◆ SCIPrelaxSetCopy()

◆ SCIPrelaxSetFree()

◆ SCIPrelaxSetInit()

◆ SCIPrelaxSetExit()

◆ SCIPrelaxSetInitsol()

◆ SCIPrelaxSetExitsol()

◆ SCIPrelaxSetPriority()

◆ SCIPrelaxEnableOrDisableClocks()

◆ SCIPrelaxIsSolved()

◆ SCIPrelaxationCreate()

◆ SCIPrelaxationFree()

◆ SCIPrelaxationSetSolZero()

◆ SCIPrelaxationIsSolZero()

◆ SCIPrelaxationSetSolValid()

◆ SCIPrelaxationIsSolValid()

◆ SCIPrelaxationIsLpIncludedForSol()

◆ SCIPrelaxationSetSolObj()

◆ SCIPrelaxationGetSolObj()

◆ SCIPrelaxationSolObjAdd()

◆ SCIPrelaxationUpdateVarObj()

◆ SCIPrelaxationSetSolRelax()

◆ SCIPrelaxationGetSolRelax()