Detailed Description

internal methods for separators

Author: Tobias Achterberg

Definition in file sepa.h.

#include "scip/def.h"
#include "blockmemshell/memory.h"
#include "scip/type_retcode.h"
#include "scip/type_result.h"
#include "scip/type_set.h"
#include "scip/type_stat.h"
#include "scip/type_sepastore.h"
#include "scip/type_sepa.h"
#include "scip/pub_sepa.h"

Go to the source code of this file.

Functions
SCIP_RETCODE	SCIPsepaCopyInclude (SCIP_SEPA sepa, SCIP_SET set)

SCIP_RETCODE	SCIPsepaCreate (SCIP_SEPA *sepa, SCIP_SET set, SCIP_MESSAGEHDLR messagehdlr, BMS_BLKMEM blkmem, const char name, const char desc, int priority, int freq, SCIP_Real maxbounddist, SCIP_Bool usessubscip, SCIP_Bool delay, SCIP_DECL_SEPACOPY((sepacopy)), SCIP_DECL_SEPAFREE((sepafree)), SCIP_DECL_SEPAINIT((sepainit)), SCIP_DECL_SEPAEXIT((sepaexit)), SCIP_DECL_SEPAINITSOL((sepainitsol)), SCIP_DECL_SEPAEXITSOL((sepaexitsol)), SCIP_DECL_SEPAEXECLP((sepaexeclp)), SCIP_DECL_SEPAEXECSOL((sepaexecsol)), SCIP_SEPADATA *sepadata)

SCIP_RETCODE	SCIPsepaFree (SCIP_SEPA *sepa, SCIP_SET set)

SCIP_RETCODE	SCIPsepaInit (SCIP_SEPA sepa, SCIP_SET set)

SCIP_RETCODE	SCIPsepaExit (SCIP_SEPA sepa, SCIP_SET set)

SCIP_RETCODE	SCIPsepaInitsol (SCIP_SEPA sepa, SCIP_SET set)

SCIP_RETCODE	SCIPsepaExitsol (SCIP_SEPA sepa, SCIP_SET set)

SCIP_RETCODE	SCIPsepaExecLP (SCIP_SEPA sepa, SCIP_SET set, SCIP_STAT stat, SCIP_SEPASTORE sepastore, int depth, SCIP_Real bounddist, SCIP_Bool allowlocal, SCIP_Bool execdelayed, SCIP_RESULT *result)

SCIP_RETCODE	SCIPsepaExecSol (SCIP_SEPA sepa, SCIP_SET set, SCIP_STAT stat, SCIP_SEPASTORE sepastore, SCIP_SOL sol, int depth, SCIP_Bool allowlocal, SCIP_Bool execdelayed, SCIP_RESULT result)

void	SCIPsepaSetPriority (SCIP_SEPA sepa, SCIP_SET set, int priority)

void	SCIPsepaSetCopy (SCIP_SEPA sepa, SCIP_DECL_SEPACOPY((sepacopy)))

void	SCIPsepaSetFree (SCIP_SEPA sepa, SCIP_DECL_SEPAFREE((sepafree)))

void	SCIPsepaSetInit (SCIP_SEPA sepa, SCIP_DECL_SEPAINIT((sepainit)))

void	SCIPsepaSetExit (SCIP_SEPA sepa, SCIP_DECL_SEPAEXIT((sepaexit)))

void	SCIPsepaSetInitsol (SCIP_SEPA sepa, SCIP_DECL_SEPAINITSOL((sepainitsol)))

void	SCIPsepaSetExitsol (SCIP_SEPA sepa, SCIP_DECL_SEPAEXITSOL((sepaexitsol)))

void	SCIPsepaEnableOrDisableClocks (SCIP_SEPA *sepa, SCIP_Bool enable)

void	SCIPsepaIncNAppliedCuts (SCIP_SEPA *sepa)

void	SCIPsepaIncNCutsFound (SCIP_SEPA *sepa)

void	SCIPsepaIncNCutsFoundAtNode (SCIP_SEPA *sepa)

Function Documentation

◆ SCIPsepaCopyInclude()

SCIP_RETCODE SCIPsepaCopyInclude	(	SCIP_SEPA *	sepa,
		SCIP_SET *	set
	)

copies the given separator to a new scip

Parameters

sepa	separator
set	SCIP_SET of SCIP to copy to

Definition at line 69 of file sepa.c.

References SCIP_CALL, SCIP_OKAY, SCIPsepaGetName(), and SCIPsetDebugMsg.

◆ SCIPsepaCreate()

SCIP_RETCODE SCIPsepaCreate	(	SCIP_SEPA **	sepa,
		SCIP_SET *	set,
		SCIP_MESSAGEHDLR *	messagehdlr,
		BMS_BLKMEM *	blkmem,
		const char *	name,
		const char *	desc,
		int	priority,
		int	freq,
		SCIP_Real	maxbounddist,
		SCIP_Bool	usessubscip,
		SCIP_Bool	delay,
		SCIP_DECL_SEPACOPY((*sepacopy))	,
		SCIP_DECL_SEPAFREE((*sepafree))	,
		SCIP_DECL_SEPAINIT((*sepainit))	,
		SCIP_DECL_SEPAEXIT((*sepaexit))	,
		SCIP_DECL_SEPAINITSOL((*sepainitsol))	,
		SCIP_DECL_SEPAEXITSOL((*sepaexitsol))	,
		SCIP_DECL_SEPAEXECLP((*sepaexeclp))	,
		SCIP_DECL_SEPAEXECSOL((*sepaexecsol))	,
		SCIP_SEPADATA *	sepadata
	)

creates a separator

Parameters

sepa	pointer to separator data structure
set	global SCIP settings
messagehdlr	message handler
blkmem	block memory for parameter settings
name	name of separator
desc	description of separator
priority	priority of separator (>= 0: before, < 0: after constraint handlers)
freq	frequency for calling separator
maxbounddist	maximal relative distance from current node's dual bound to primal bound compared to best node's dual bound for applying separation
usessubscip	does the separator use a secondary SCIP instance?
delay	should separator be delayed, if other separators found cuts?
sepadata	separator data

Definition at line 87 of file sepa.c.

References BMSallocMemory, BMSduplicateMemoryArray, FALSE, SCIP_ALLOC, SCIP_CALL, SCIP_CLOCKTYPE_DEFAULT, SCIP_MAXSTRLEN, SCIP_MAXTREEDEPTH, SCIP_OKAY, SCIPclockCreate(), SCIPsetAddBoolParam(), SCIPsetAddIntParam(), SCIPsetAddRealParam(), SCIPsnprintf(), and TRUE.

Referenced by SCIPincludeSepa(), and SCIPincludeSepaBasic().

◆ SCIPsepaFree()

SCIP_RETCODE SCIPsepaFree	(	SCIP_SEPA **	sepa,
		SCIP_SET *	set
	)

calls destructor and frees memory of separator

Parameters

sepa	pointer to separator data structure
set	global SCIP settings

Definition at line 184 of file sepa.c.

References BMSfreeMemory, BMSfreeMemoryArray, SCIP_CALL, SCIP_OKAY, and SCIPclockFree().

◆ SCIPsepaInit()

SCIP_RETCODE SCIPsepaInit	(	SCIP_SEPA *	sepa,
		SCIP_SET *	set
	)

initializes separator

Parameters

sepa	separator
set	global SCIP settings

Definition at line 210 of file sepa.c.

References FALSE, SCIP_Sepa::initialized, SCIP_Sepa::lastsepanode, SCIP_Sepa::lpwasdelayed, SCIP_Sepa::name, SCIP_Sepa::ncalls, SCIP_Sepa::ncallsatnode, SCIP_Sepa::nconssfound, SCIP_Sepa::ncutoffs, SCIP_Sepa::ncutsapplied, SCIP_Sepa::ncutsfound, SCIP_Sepa::ncutsfoundatnode, SCIP_Sepa::ndomredsfound, SCIP_CALL, SCIP_INVALIDCALL, SCIP_OKAY, SCIPclockReset(), SCIPclockStart(), SCIPclockStop(), SCIPerrorMessage, SCIP_Sepa::sepaclock, SCIP_Sepa::setuptime, SCIP_Sepa::solwasdelayed, and TRUE.

◆ SCIPsepaExit()

SCIP_RETCODE SCIPsepaExit	(	SCIP_SEPA *	sepa,
		SCIP_SET *	set
	)

calls exit method of separator

Parameters

sepa	separator
set	global SCIP settings

Definition at line 258 of file sepa.c.

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

Referenced by SCIPsetInitPlugins().

◆ SCIPsepaInitsol()

SCIP_RETCODE SCIPsepaInitsol	(	SCIP_SEPA *	sepa,
		SCIP_SET *	set
	)

informs separator that the branch and bound process is being started

Parameters

sepa	separator
set	global SCIP settings

Definition at line 288 of file sepa.c.

References FALSE, SCIP_Sepa::lpwasdelayed, SCIP_CALL, SCIP_OKAY, SCIPclockStart(), SCIPclockStop(), SCIP_Sepa::setuptime, and SCIP_Sepa::solwasdelayed.

Referenced by SCIPsetExitprePlugins().

◆ SCIPsepaExitsol()

SCIP_RETCODE SCIPsepaExitsol	(	SCIP_SEPA *	sepa,
		SCIP_SET *	set
	)

informs separator that the branch and bound process data is being freed

Parameters

sepa	separator
set	global SCIP settings

Definition at line 315 of file sepa.c.

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

Referenced by SCIPsetInitsolPlugins().

◆ SCIPsepaExecLP()

SCIP_RETCODE SCIPsepaExecLP	(	SCIP_SEPA *	sepa,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_SEPASTORE *	sepastore,
		int	depth,
		SCIP_Real	bounddist,
		SCIP_Bool	allowlocal,
		SCIP_Bool	execdelayed,
		SCIP_RESULT *	result
	)

calls LP separation method of separator

Parameters

sepa	separator
set	global SCIP settings
stat	dynamic problem statistics
sepastore	separation storage
depth	depth of current node
bounddist	current relative distance of local dual bound to global dual bound
allowlocal	should the separator be asked to separate local cuts
execdelayed	execute separator even if it is marked to be delayed
result	pointer to store the result of the callback method

Definition at line 339 of file sepa.c.

References SCIP_Sepa::delay, SCIP_Sepa::expbackoff, SCIP_Sepa::freq, SCIP_Sepa::lastsepanode, SCIP_Sepa::lpwasdelayed, MAX, SCIP_Sepa::maxbounddist, SCIP_Stat::nactiveconss, SCIP_Sepa::name, SCIP_Stat::nboundchgs, SCIP_Sepa::ncalls, SCIP_Sepa::ncallsatnode, SCIP_Sepa::nconssfound, SCIP_Sepa::ncutoffs, SCIP_Sepa::ncutsfound, SCIP_Sepa::ncutsfoundatnode, SCIP_Sepa::ndomredsfound, SCIP_Stat::nholechgs, SCIP_Stat::nprobboundchgs, SCIP_Stat::nprobholechgs, SCIP_Stat::ntotalnodes, SCIP_CALL, SCIP_CONSADDED, SCIP_CUTOFF, SCIP_DELAYED, SCIP_DIDNOTFIND, SCIP_DIDNOTRUN, SCIP_INVALIDRESULT, SCIP_Longint, SCIP_NEWROUND, SCIP_OKAY, SCIP_Real, SCIP_REDUCEDDOM, SCIP_SEPARATED, SCIPclockStart(), SCIPclockStop(), SCIPerrorMessage, SCIPsepastoreGetNCuts(), SCIPsetDebugMsg, SCIPsetIsIntegral(), SCIPsetIsLE(), and SCIP_Sepa::sepaclock.

Referenced by separationRoundLP().

◆ SCIPsepaExecSol()

SCIP_RETCODE SCIPsepaExecSol	(	SCIP_SEPA *	sepa,
		SCIP_SET *	set,
		SCIP_STAT *	stat,
		SCIP_SEPASTORE *	sepastore,
		SCIP_SOL *	sol,
		int	depth,
		SCIP_Bool	allowlocal,
		SCIP_Bool	execdelayed,
		SCIP_RESULT *	result
	)

calls primal solution separation method of separator

Parameters

sepa	separator
set	global SCIP settings
stat	dynamic problem statistics
sepastore	separation storage
sol	primal solution that should be separated
depth	depth of current node
allowlocal	should the separator allow local cuts
execdelayed	execute separator even if it is marked to be delayed
result	pointer to store the result of the callback method