Detailed Description

Constraint handler for "or" constraints, $r = x_1 \vee x_2 \vee \dots \vee x_n$ .

Author: Tobias Achterberg; Stefan Heinz; Michael Winkler

This constraint handler deals with "or" constraint. These are constraint of the form:

$r = x_1 \vee x_2 \vee \dots \vee x_n$

where $x_i$ is a binary variable for all $i$ . Hence, $r$ is also of binary type. The variable $r$ is called resultant and the $x$ 's operators.

Definition in file cons_or.c.

#include <assert.h>
#include <string.h>
#include "scip/cons_or.h"
#include "scip/cons_and.h"
#include "scip/pub_misc.h"

Go to the source code of this file.

Macros
#define	CONSHDLR_NAME "or"

#define	CONSHDLR_DESC "constraint handler for or constraints: r = or(x1, ..., xn)"

#define	CONSHDLR_SEPAPRIORITY +850000

#define	CONSHDLR_ENFOPRIORITY -850000

#define	CONSHDLR_CHECKPRIORITY -850000

#define	CONSHDLR_SEPAFREQ 0

#define	CONSHDLR_PROPFREQ 1

#define	CONSHDLR_EAGERFREQ 100

#define	CONSHDLR_MAXPREROUNDS -1

#define	CONSHDLR_DELAYSEPA FALSE

#define	CONSHDLR_DELAYPROP FALSE

#define	CONSHDLR_NEEDSCONS TRUE

#define	CONSHDLR_PROP_TIMING SCIP_PROPTIMING_BEFORELP

#define	CONSHDLR_PRESOLTIMING SCIP_PRESOLTIMING_MEDIUM

#define	EVENTHDLR_NAME "or"

#define	EVENTHDLR_DESC "event handler for or constraints"

Typedefs
typedef enum Proprule	PROPRULE

Enumerations
enum	Proprule { PROPRULE_1, PROPRULE_2, PROPRULE_3, PROPRULE_4, PROPRULE_INVALID, PROPRULE_INVALID = 0, PROPRULE_1 = 1, PROPRULE_2 = 2, PROPRULE_3 = 3, PROPRULE_4 = 4, PROPRULE_1_CORETIMES = 1, PROPRULE_2_EDGEFINDING = 2, PROPRULE_3_TTEF = 3, PROPRULE_1_RHS = 1, PROPRULE_1_LHS = 2, PROPRULE_1_RANGEDROW = 3, PROPRULE_INVALID = 0, PROPRULE_1, PROPRULE_2, PROPRULE_3, PROPRULE_4, PROPRULE_INVALID, PROPRULE_1, PROPRULE_2, PROPRULE_3, PROPRULE_4, PROPRULE_0, PROPRULE_1, PROPRULE_INTLB, PROPRULE_INTUB, PROPRULE_INVALID }

Functions
static SCIP_RETCODE	lockRounding (SCIP scip, SCIP_CONS cons, SCIP_VAR *var)

static SCIP_RETCODE	unlockRounding (SCIP scip, SCIP_CONS cons, SCIP_VAR *var)

static SCIP_RETCODE	conshdlrdataCreate (SCIP scip, SCIP_CONSHDLRDATA conshdlrdata, SCIP_EVENTHDLR eventhdlr)

static SCIP_RETCODE	conshdlrdataFree (SCIP scip, SCIP_CONSHDLRDATA *conshdlrdata)

static int	consdataGetNRows (SCIP_CONSDATA *consdata)

static SCIP_RETCODE	consdataCatchWatchedEvents (SCIP scip, SCIP_CONSDATA consdata, SCIP_EVENTHDLR eventhdlr, int pos, int filterpos)

static SCIP_RETCODE	consdataDropWatchedEvents (SCIP scip, SCIP_CONSDATA consdata, SCIP_EVENTHDLR *eventhdlr, int pos, int filterpos)

static SCIP_RETCODE	consdataCatchEvents (SCIP scip, SCIP_CONSDATA consdata, SCIP_EVENTHDLR *eventhdlr)

static SCIP_RETCODE	consdataDropEvents (SCIP scip, SCIP_CONSDATA consdata, SCIP_EVENTHDLR *eventhdlr)

static SCIP_RETCODE	consdataSwitchWatchedvars (SCIP scip, SCIP_CONSDATA consdata, SCIP_EVENTHDLR *eventhdlr, int watchedvar1, int watchedvar2)

static SCIP_RETCODE	consdataEnsureVarsSize (SCIP scip, SCIP_CONSDATA consdata, int num)

static SCIP_RETCODE	consdataCreate (SCIP scip, SCIP_CONSDATA consdata, SCIP_EVENTHDLR eventhdlr, int nvars, SCIP_VAR *vars, SCIP_VAR resvar)

static SCIP_RETCODE	consdataFreeRows (SCIP scip, SCIP_CONSDATA consdata)

static SCIP_RETCODE	consdataFree (SCIP scip, SCIP_CONSDATA consdata, SCIP_EVENTHDLR eventhdlr)

static SCIP_RETCODE	consdataPrint (SCIP scip, SCIP_CONSDATA consdata, FILE *file)

static SCIP_RETCODE	addCoef (SCIP scip, SCIP_CONS cons, SCIP_EVENTHDLR eventhdlr, SCIP_VAR var)

static SCIP_RETCODE	delCoefPos (SCIP scip, SCIP_CONS cons, SCIP_EVENTHDLR *eventhdlr, int pos)

static SCIP_RETCODE	applyFixings (SCIP scip, SCIP_CONS cons, SCIP_EVENTHDLR *eventhdlr)

static SCIP_RETCODE	createRelaxation (SCIP scip, SCIP_CONS cons)

static SCIP_RETCODE	addRelaxation (SCIP scip, SCIP_CONS cons)

static SCIP_RETCODE	checkCons (SCIP scip, SCIP_CONS cons, SCIP_SOL sol, SCIP_Bool checklprows, SCIP_Bool printreason, SCIP_Bool violated)

static SCIP_RETCODE	separateCons (SCIP scip, SCIP_CONS cons, SCIP_SOL sol, SCIP_Bool separated)

static SCIP_RETCODE	analyzeConflictZero (SCIP scip, SCIP_CONS cons, int truepos)

static SCIP_RETCODE	analyzeConflictOne (SCIP scip, SCIP_CONS cons)

static SCIP_RETCODE	propagateCons (SCIP scip, SCIP_CONS cons, SCIP_EVENTHDLR eventhdlr, SCIP_Bool cutoff, int *nfixedvars)

static SCIP_RETCODE	resolvePropagation (SCIP scip, SCIP_CONS cons, SCIP_VAR infervar, PROPRULE proprule, SCIP_BDCHGIDX bdchgidx, SCIP_RESULT *result)

static SCIP_RETCODE	upgradeCons (SCIP scip, SCIP_CONS cons, int *nupgdconss)

static	SCIP_DECL_CONSHDLRCOPY (conshdlrCopyOr)

static	SCIP_DECL_CONSFREE (consFreeOr)

static	SCIP_DECL_CONSEXITSOL (consExitsolOr)

static	SCIP_DECL_CONSDELETE (consDeleteOr)

static	SCIP_DECL_CONSTRANS (consTransOr)

static	SCIP_DECL_CONSINITLP (consInitlpOr)

static	SCIP_DECL_CONSSEPALP (consSepalpOr)

static	SCIP_DECL_CONSSEPASOL (consSepasolOr)

static	SCIP_DECL_CONSENFOLP (consEnfolpOr)

static	SCIP_DECL_CONSENFOPS (consEnfopsOr)

static	SCIP_DECL_CONSCHECK (consCheckOr)

static	SCIP_DECL_CONSPROP (consPropOr)

static	SCIP_DECL_CONSPRESOL (consPresolOr)

static	SCIP_DECL_CONSRESPROP (consRespropOr)

static	SCIP_DECL_CONSLOCK (consLockOr)

static	SCIP_DECL_CONSPRINT (consPrintOr)

static	SCIP_DECL_CONSCOPY (consCopyOr)

static	SCIP_DECL_CONSPARSE (consParseOr)

static	SCIP_DECL_CONSGETVARS (consGetVarsOr)

static	SCIP_DECL_CONSGETNVARS (consGetNVarsOr)

static	SCIP_DECL_EVENTEXEC (eventExecOr)

SCIP_RETCODE	SCIPincludeConshdlrOr (SCIP *scip)

SCIP_RETCODE	SCIPcreateConsOr (SCIP scip, SCIP_CONS cons, const char name, SCIP_VAR resvar, int nvars, SCIP_VAR *vars, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)

SCIP_RETCODE	SCIPcreateConsBasicOr (SCIP scip, SCIP_CONS cons, const char name, SCIP_VAR resvar, int nvars, SCIP_VAR *vars)

int	SCIPgetNVarsOr (SCIP scip, SCIP_CONS cons)

SCIP_VAR **	SCIPgetVarsOr (SCIP scip, SCIP_CONS cons)

SCIP_VAR *	SCIPgetResultantOr (SCIP scip, SCIP_CONS cons)

Macro Definition Documentation

#define CONSHDLR_NAME "or"

Definition at line 43 of file cons_or.c.

Referenced by SCIP_DECL_CONSHDLRCOPY(), SCIPcreateConsOr(), SCIPgetNVarsOr(), SCIPgetResultantOr(), SCIPgetVarsOr(), and SCIPincludeConshdlrOr().

#define CONSHDLR_DESC "constraint handler for or constraints: r = or(x1, ..., xn)"

Definition at line 44 of file cons_or.c.

Referenced by SCIPincludeConshdlrOr().

#define CONSHDLR_SEPAPRIORITY +850000

priority of the constraint handler for separation

Definition at line 45 of file cons_or.c.

Referenced by SCIPincludeConshdlrOr().

#define CONSHDLR_ENFOPRIORITY -850000

priority of the constraint handler for constraint enforcing

Definition at line 46 of file cons_or.c.

Referenced by SCIPincludeConshdlrOr().

#define CONSHDLR_CHECKPRIORITY -850000

priority of the constraint handler for checking feasibility

Definition at line 47 of file cons_or.c.

Referenced by SCIPincludeConshdlrOr().

#define CONSHDLR_SEPAFREQ 0

frequency for separating cuts; zero means to separate only in the root node

Definition at line 48 of file cons_or.c.

Referenced by SCIPincludeConshdlrOr().

#define CONSHDLR_PROPFREQ 1

frequency for propagating domains; zero means only preprocessing propagation

Definition at line 49 of file cons_or.c.

Referenced by SCIPincludeConshdlrOr().

#define CONSHDLR_EAGERFREQ 100

frequency for using all instead of only the useful constraints in separation, propagation and enforcement, -1 for no eager evaluations, 0 for first only

Definition at line 50 of file cons_or.c.

Referenced by SCIPincludeConshdlrOr().

#define CONSHDLR_MAXPREROUNDS -1

maximal number of presolving rounds the constraint handler participates in (-1: no limit)

Definition at line 53 of file cons_or.c.

Referenced by SCIPincludeConshdlrOr().

#define CONSHDLR_DELAYSEPA FALSE

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

Definition at line 54 of file cons_or.c.

Referenced by SCIPincludeConshdlrOr().

#define CONSHDLR_DELAYPROP FALSE

should propagation method be delayed, if other propagators found reductions?

Definition at line 55 of file cons_or.c.

Referenced by SCIPincludeConshdlrOr().

#define CONSHDLR_NEEDSCONS TRUE

should the constraint handler be skipped, if no constraints are available?

Definition at line 56 of file cons_or.c.

Referenced by SCIPincludeConshdlrOr().

#define CONSHDLR_PROP_TIMING SCIP_PROPTIMING_BEFORELP

propagation timing mask of the constraint handler

Definition at line 58 of file cons_or.c.

Referenced by SCIPincludeConshdlrOr().

#define CONSHDLR_PRESOLTIMING SCIP_PRESOLTIMING_MEDIUM

presolving timing of the constraint handler (fast, medium, or exhaustive)

Definition at line 59 of file cons_or.c.

Referenced by SCIPincludeConshdlrOr().

#define EVENTHDLR_NAME "or"

Definition at line 61 of file cons_or.c.

Referenced by SCIPincludeConshdlrOr().

#define EVENTHDLR_DESC "event handler for or constraints"

Definition at line 62 of file cons_or.c.

Referenced by SCIPincludeConshdlrOr().

Typedef Documentation

typedef enum Proprule PROPRULE

Definition at line 107 of file cons_or.c.

Enumeration Type Documentation

enum Proprule

Enumerator
PROPRULE_1	left hand side and bounds on z -> lower bound on x
PROPRULE_2	left hand side and upper bound on x -> bound on z
PROPRULE_3	right hand side and bounds on z -> upper bound on x
PROPRULE_4	right hand side and lower bound on x -> bound on z
PROPRULE_INVALID	propagation was applied without a specific propagation rule
PROPRULE_INVALID	propagation was applied without a specific propagation rule
PROPRULE_1	v_i = FALSE => r = FALSE
PROPRULE_2	r = TRUE => v_i = TRUE for all i
PROPRULE_3	v_i = TRUE for all i => r = TRUE
PROPRULE_4	r = FALSE, v_i = TRUE for all i except j => v_j = FALSE
PROPRULE_1_CORETIMES	core-time propagator
PROPRULE_2_EDGEFINDING	edge-finder
PROPRULE_3_TTEF	time-table edeg-finding
PROPRULE_1_RHS	activity residuals of all other variables tighten bounds of single variable due to the right hand side of the inequality
PROPRULE_1_LHS	activity residuals of all other variables tighten bounds of single variable due to the left hand side of the inequality
PROPRULE_1_RANGEDROW	fixed variables and gcd of all left variables tighten bounds of a single variable in this reanged row
PROPRULE_INVALID	propagation was applied without a specific propagation rule
PROPRULE_1	v_i = TRUE => r = TRUE
PROPRULE_2	r = FALSE => v_i = FALSE for all i
PROPRULE_3	v_i = FALSE for all i => r = FALSE
PROPRULE_4	r = TRUE, v_i = FALSE for all i except j => v_j = TRUE
PROPRULE_INVALID	propagation was applied without a specific propagation rule
PROPRULE_1	left hand side and bounds on y -> lower bound on x
PROPRULE_2	left hand side and upper bound on x -> bound on y
PROPRULE_3	right hand side and bounds on y -> upper bound on x
PROPRULE_4	right hand side and lower bound on x -> bound on y
PROPRULE_0	all variables are fixed => fix integral variable
PROPRULE_1	all except one variable fixed => fix remaining variable
PROPRULE_INTLB	lower bound propagation of integral variable
PROPRULE_INTUB	upper bound propagation of integral variable
PROPRULE_INVALID	propagation was applied without a specific propagation rule

Definition at line 99 of file cons_or.c.

Function Documentation

static SCIP_RETCODE lockRounding	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_VAR *	var
	)

static

installs rounding locks for the given variable in the given or constraint

Parameters

scip	SCIP data structure
cons	or constraint
var	variable of constraint entry

Definition at line 116 of file cons_or.c.

References SCIP_CALL, SCIP_OKAY, SCIPlockVarCons(), TRUE, and unlockRounding().

Referenced by addCoef().

static SCIP_RETCODE unlockRounding	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_VAR *	var
	)

static

removes rounding locks for the given variable in the given or constraint

Parameters

scip	SCIP data structure
cons	or constraint
var	variable of constraint entry

Definition at line 130 of file cons_or.c.

References conshdlrdataCreate(), SCIP_CALL, SCIP_OKAY, SCIPunlockVarCons(), and TRUE.

Referenced by delCoefPos(), and lockRounding().

static SCIP_RETCODE conshdlrdataCreate	(	SCIP *	scip,
		SCIP_CONSHDLRDATA **	conshdlrdata,
		SCIP_EVENTHDLR *	eventhdlr
	)

static

creates constraint handler data

Parameters

scip	SCIP data structure
conshdlrdata	pointer to store the constraint handler data
eventhdlr	event handler

Definition at line 144 of file cons_or.c.

References conshdlrdataFree(), NULL, SCIP_CALL, SCIP_OKAY, and SCIPallocMemory.

Referenced by SCIPincludeConshdlrOr(), and unlockRounding().

static SCIP_RETCODE conshdlrdataFree	(	SCIP *	scip,
		SCIP_CONSHDLRDATA **	conshdlrdata
	)

static

frees constraint handler data

Parameters

scip	SCIP data structure
conshdlrdata	pointer to the constraint handler data

Definition at line 164 of file cons_or.c.

References consdataGetNRows(), NULL, SCIP_OKAY, and SCIPfreeMemory.

Referenced by conshdlrdataCreate(), and SCIP_DECL_CONSFREE().

static int consdataGetNRows ( SCIP_CONSDATA * consdata )

static

gets number of LP rows needed for the LP relaxation of the constraint

Parameters

consdata constraint data

Definition at line 179 of file cons_or.c.

References consdataCatchWatchedEvents(), and NULL.

Referenced by addRelaxation(), checkCons(), consdataFreeRows(), conshdlrdataFree(), createRelaxation(), and separateCons().

static SCIP_RETCODE consdataCatchWatchedEvents	(	SCIP *	scip,
		SCIP_CONSDATA *	consdata,
		SCIP_EVENTHDLR *	eventhdlr,
		int	pos,
		int *	filterpos
	)

static

catches events for the watched variable at given position

Parameters

scip	SCIP data structure
consdata	or constraint data
eventhdlr	event handler to call for the event processing
pos	array position of variable to catch bound change events for
filterpos	pointer to store position of event filter entry

Definition at line 190 of file cons_or.c.

References consdataDropWatchedEvents(), NULL, SCIP_CALL, SCIP_EVENTTYPE_LBRELAXED, SCIP_EVENTTYPE_UBTIGHTENED, SCIP_OKAY, and SCIPcatchVarEvent().

Referenced by consdataGetNRows(), and consdataSwitchWatchedvars().

static SCIP_RETCODE consdataDropWatchedEvents	(	SCIP *	scip,
		SCIP_CONSDATA *	consdata,
		SCIP_EVENTHDLR *	eventhdlr,
		int	pos,
		int	filterpos
	)

static

drops events for the watched variable at given position

Parameters

scip	SCIP data structure
consdata	or constraint data
eventhdlr	event handler to call for the event processing
pos	array position of watched variable to drop bound change events for
filterpos	position of event filter entry

Definition at line 214 of file cons_or.c.

References consdataCatchEvents(), NULL, SCIP_CALL, SCIP_EVENTTYPE_LBRELAXED, SCIP_EVENTTYPE_UBTIGHTENED, SCIP_OKAY, and SCIPdropVarEvent().

Referenced by consdataCatchWatchedEvents(), and consdataSwitchWatchedvars().

static SCIP_RETCODE consdataCatchEvents	(	SCIP *	scip,
		SCIP_CONSDATA *	consdata,
		SCIP_EVENTHDLR *	eventhdlr
	)

static

catches needed events on all variables of constraint, except the special ones for watched variables

Parameters

scip	SCIP data structure
consdata	or constraint data
eventhdlr	event handler to call for the event processing

Definition at line 237 of file cons_or.c.

References consdataDropEvents(), NULL, SCIP_CALL, SCIP_EVENTTYPE_BOUNDCHANGED, SCIP_EVENTTYPE_LBTIGHTENED, SCIP_EVENTTYPE_UBRELAXED, SCIP_OKAY, and SCIPcatchVarEvent().

Referenced by consdataCreate(), and consdataDropWatchedEvents().

static SCIP_RETCODE consdataDropEvents	(	SCIP *	scip,
		SCIP_CONSDATA *	consdata,
		SCIP_EVENTHDLR *	eventhdlr
	)

static

drops events on all variables of constraint, except the special ones for watched variables

Parameters

scip	SCIP data structure
consdata	or constraint data
eventhdlr	event handler to call for the event processing

Definition at line 263 of file cons_or.c.

References consdataSwitchWatchedvars(), NULL, SCIP_CALL, SCIP_EVENTTYPE_BOUNDCHANGED, SCIP_EVENTTYPE_LBTIGHTENED, SCIP_EVENTTYPE_UBRELAXED, SCIP_OKAY, and SCIPdropVarEvent().

Referenced by consdataCatchEvents(), and consdataFree().

static SCIP_RETCODE consdataSwitchWatchedvars	(	SCIP *	scip,
		SCIP_CONSDATA *	consdata,
		SCIP_EVENTHDLR *	eventhdlr,
		int	watchedvar1,
		int	watchedvar2
	)

static

stores the given variable numbers as watched variables, and updates the event processing

Parameters

scip	SCIP data structure
consdata	or constraint data
eventhdlr	event handler to call for the event processing
watchedvar1	new first watched variable
watchedvar2	new second watched variable

Definition at line 289 of file cons_or.c.

References consdataCatchWatchedEvents(), consdataDropWatchedEvents(), consdataEnsureVarsSize(), NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by consdataDropEvents(), consdataFree(), delCoefPos(), and propagateCons().

static SCIP_RETCODE consdataEnsureVarsSize	(	SCIP *	scip,
		SCIP_CONSDATA *	consdata,
		int	num
	)

static

ensures, that the vars array can store at least num entries

Parameters

scip	SCIP data structure
consdata	linear constraint data
num	minimum number of entries to store

Definition at line 349 of file cons_or.c.

References consdataCreate(), NULL, SCIP_CALL, SCIP_OKAY, SCIPcalcMemGrowSize(), and SCIPreallocBlockMemoryArray.

Referenced by addCoef(), and consdataSwitchWatchedvars().

static SCIP_RETCODE consdataCreate	(	SCIP *	scip,
		SCIP_CONSDATA **	consdata,
		SCIP_EVENTHDLR *	eventhdlr,
		int	nvars,
		SCIP_VAR **	vars,
		SCIP_VAR *	resvar
	)

static

creates constraint data for or constraint

Parameters

scip	SCIP data structure
consdata	pointer to store the constraint data
eventhdlr	event handler to call for the event processing
nvars	number of variables in the or operation
vars	variables in or operation
resvar	resultant variable

Definition at line 373 of file cons_or.c.

References consdataCatchEvents(), consdataFreeRows(), FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPallocBlockMemory, SCIPduplicateBlockMemoryArray, SCIPgetTransformedVar(), SCIPgetTransformedVars(), and SCIPisTransformed().

Referenced by consdataEnsureVarsSize(), SCIP_DECL_CONSTRANS(), and SCIPcreateConsOr().

static SCIP_RETCODE consdataFreeRows	(	SCIP *	scip,
		SCIP_CONSDATA *	consdata
	)

static

releases LP rows of constraint data and frees rows array

Parameters

scip	SCIP data structure
consdata	constraint data

Definition at line 417 of file cons_or.c.

References consdataFree(), consdataGetNRows(), NULL, SCIP_CALL, SCIP_OKAY, SCIPfreeBlockMemoryArray, and SCIPreleaseRow().

Referenced by consdataCreate(), consdataFree(), and SCIP_DECL_CONSEXITSOL().

static SCIP_RETCODE consdataFree	(	SCIP *	scip,
		SCIP_CONSDATA **	consdata,
		SCIP_EVENTHDLR *	eventhdlr
	)

static

frees constraint data for or constraint

Parameters

scip	SCIP data structure
consdata	pointer to the constraint data
eventhdlr	event handler to call for the event processing

Definition at line 444 of file cons_or.c.

References consdataDropEvents(), consdataFreeRows(), consdataPrint(), consdataSwitchWatchedvars(), NULL, SCIP_CALL, SCIP_OKAY, SCIPfreeBlockMemory, SCIPfreeBlockMemoryArray, and SCIPisTransformed().

Referenced by consdataFreeRows(), and SCIP_DECL_CONSDELETE().

static SCIP_RETCODE consdataPrint	(	SCIP *	scip,
		SCIP_CONSDATA *	consdata,
		FILE *	file
	)

static

prints or constraint to file stream

Parameters

scip	SCIP data structure
consdata	or constraint data
file	output file (or NULL for standard output)

Definition at line 478 of file cons_or.c.

References addCoef(), NULL, SCIP_CALL, SCIP_OKAY, SCIPinfoMessage(), SCIPwriteVarName(), SCIPwriteVarsList(), and TRUE.

Referenced by applyFixings(), consdataFree(), and SCIP_DECL_CONSPRINT().

static SCIP_RETCODE addCoef	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_EVENTHDLR *	eventhdlr,
		SCIP_VAR *	var
	)

static

adds coefficient in or constraint

Parameters

scip	SCIP data structure
cons	linear constraint
eventhdlr	event handler to call for the event processing
var	variable to add to the constraint

Definition at line 503 of file cons_or.c.

References consdataEnsureVarsSize(), delCoefPos(), lockRounding(), NULL, SCIP_Bool, SCIP_CALL, SCIP_EVENTTYPE_LBTIGHTENED, SCIP_EVENTTYPE_UBRELAXED, SCIP_INVALIDCALL, SCIP_OKAY, SCIPcatchVarEvent(), SCIPconsGetData(), SCIPconsIsTransformed(), SCIPerrorMessage, SCIPgetTransformedVar(), and SCIPvarIsTransformed().

Referenced by applyFixings(), and consdataPrint().

static SCIP_RETCODE delCoefPos	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_EVENTHDLR *	eventhdlr,
		int	pos
	)

static

deletes coefficient at given position from or constraint data

Parameters

scip	SCIP data structure
cons	or constraint
eventhdlr	event handler to call for the event processing
pos	position of coefficient to delete

Definition at line 557 of file cons_or.c.

References applyFixings(), consdataSwitchWatchedvars(), FALSE, NULL, SCIP_CALL, SCIP_EVENTTYPE_LBTIGHTENED, SCIP_EVENTTYPE_UBRELAXED, SCIP_OKAY, SCIPconsGetData(), SCIPconsIsTransformed(), SCIPdropVarEvent(), SCIPvarIsTransformed(), and unlockRounding().

Referenced by addCoef(), and applyFixings().

static SCIP_RETCODE applyFixings	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_EVENTHDLR *	eventhdlr
	)

static

deletes all zero-fixed variables

Parameters

scip	SCIP data structure
cons	or constraint
eventhdlr	event handler to call for the event processing

Definition at line 615 of file cons_or.c.

References addCoef(), consdataPrint(), createRelaxation(), delCoefPos(), NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPconsGetData(), SCIPdebug, SCIPdebugMessage, SCIPdebugPrintf, SCIPgetBinvarRepresentative(), SCIPisFeasEQ(), SCIPvarGetLbGlobal(), SCIPvarGetUbGlobal(), and SCIPvarIsBinary().

Referenced by delCoefPos(), and SCIP_DECL_CONSPRESOL().

static SCIP_RETCODE createRelaxation	(	SCIP *	scip,
		SCIP_CONS *	cons
	)

static

creates LP rows corresponding to or constraint:

for each operator variable vi: resvar - vi >= 0
one additional row: resvar - v1 - ... - vn <= 0

Parameters

scip	SCIP data structure
cons	constraint to check

Definition at line 674 of file cons_or.c.

References addRelaxation(), consdataGetNRows(), NULL, SCIP_CALL, SCIP_MAXSTRLEN, SCIP_OKAY, SCIPaddVarsToRowSameCoef(), SCIPaddVarToRow(), SCIPallocBlockMemoryArray, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconsGetName(), SCIPconsIsLocal(), SCIPconsIsModifiable(), SCIPconsIsRemovable(), SCIPcreateEmptyRowCons(), SCIPinfinity(), and SCIPsnprintf().

Referenced by addRelaxation(), applyFixings(), and separateCons().

static SCIP_RETCODE addRelaxation	(	SCIP *	scip,
		SCIP_CONS *	cons
	)

static

adds linear relaxation of or constraint to the LP

Parameters

scip	SCIP data structure
cons	constraint to check

Definition at line 717 of file cons_or.c.

References checkCons(), consdataGetNRows(), createRelaxation(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPaddCut(), SCIPconsGetData(), and SCIProwIsInLP().

Referenced by createRelaxation(), and SCIP_DECL_CONSINITLP().

static SCIP_RETCODE checkCons	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_SOL *	sol,
		SCIP_Bool	checklprows,
		SCIP_Bool	printreason,
		SCIP_Bool *	violated
	)

static

checks or constraint for feasibility of given solution: returns TRUE iff constraint is feasible

Parameters

scip	SCIP data structure
cons	constraint to check
sol	solution to check, NULL for current solution
checklprows	Do constraints represented by rows in the current LP have to be checked?
printreason	Should the reason for the violation be printed?
violated	pointer to store whether the constraint is violated

Definition at line 752 of file cons_or.c.

References consdataGetNRows(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPconsGetData(), SCIPgetSolVal(), SCIPincConsAge(), SCIPinfoMessage(), SCIPisFeasIntegral(), SCIPprintCons(), SCIPresetConsAge(), SCIProwIsInLP(), SCIPvarGetName(), separateCons(), and TRUE.

Referenced by addRelaxation(), SCIP_DECL_CONSCHECK(), SCIP_DECL_CONSENFOLP(), and SCIP_DECL_CONSENFOPS().

static SCIP_RETCODE separateCons	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_SOL *	sol,
		SCIP_Bool *	separated
	)

static

separates current LP solution

Parameters

scip	SCIP data structure
cons	constraint to check
sol	primal CIP solution, NULL for current LP solution
separated	pointer to store whether a cut was found

Definition at line 851 of file cons_or.c.

References analyzeConflictZero(), consdataGetNRows(), createRelaxation(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPaddCut(), SCIPconsGetData(), SCIPgetRowSolFeasibility(), SCIPisFeasNegative(), SCIProwIsInLP(), and TRUE.

Referenced by checkCons(), SCIP_DECL_CONSENFOLP(), SCIP_DECL_CONSSEPALP(), and SCIP_DECL_CONSSEPASOL().

static SCIP_RETCODE analyzeConflictZero	(	SCIP *	scip,
		SCIP_CONS *	cons,
		int	truepos
	)

static

analyzes conflicting FALSE assignment to resultant of given constraint, and adds conflict constraint to problem

Parameters

scip	SCIP data structure
cons	or constraint that detected the conflict
truepos	position of operand that is fixed to TRUE

Definition at line 901 of file cons_or.c.

References analyzeConflictOne(), NULL, SCIP_CALL, SCIP_OKAY, SCIP_STAGE_SOLVING, SCIPaddConflictBinvar(), SCIPanalyzeConflictCons(), SCIPconsGetData(), SCIPgetStage(), SCIPinitConflictAnalysis(), SCIPinProbing(), SCIPisConflictAnalysisApplicable(), SCIPvarGetLbLocal(), and SCIPvarGetUbLocal().

Referenced by propagateCons(), and separateCons().

static SCIP_RETCODE analyzeConflictOne	(	SCIP *	scip,
		SCIP_CONS *	cons
	)

static

analyzes conflicting TRUE assignment to resultant of given constraint, and adds conflict constraint to problem

Parameters

scip	SCIP data structure
cons	or constraint that detected the conflict

Definition at line 932 of file cons_or.c.

References NULL, propagateCons(), SCIP_CALL, SCIP_OKAY, SCIP_STAGE_SOLVING, SCIPaddConflictBinvar(), SCIPanalyzeConflictCons(), SCIPconsGetData(), SCIPconsIsModifiable(), SCIPgetStage(), SCIPinitConflictAnalysis(), SCIPinProbing(), SCIPisConflictAnalysisApplicable(), SCIPvarGetLbLocal(), and SCIPvarGetUbLocal().

Referenced by analyzeConflictZero(), and propagateCons().

static SCIP_RETCODE propagateCons	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_EVENTHDLR *	eventhdlr,
		SCIP_Bool *	cutoff,
		int *	nfixedvars
	)

static

propagates constraint with the following rules: (1) v_i = TRUE => r = TRUE (2) r = FALSE => v_i = FALSE for all i (3) v_i = FALSE for all i => r = FALSE (4) r = TRUE, v_i = FALSE for all i except j => v_j = TRUE

Parameters

scip	SCIP data structure
cons	or constraint to be processed
eventhdlr	event handler to call for the event processing
cutoff	pointer to store TRUE, if the node can be cut off
nfixedvars	pointer to add up the number of found domain reductions

Definition at line 972 of file cons_or.c.

References analyzeConflictOne(), analyzeConflictZero(), consdataSwitchWatchedvars(), FALSE, NULL, PROPRULE_1, PROPRULE_2, PROPRULE_3, PROPRULE_4, resolvePropagation(), SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPconsGetData(), SCIPconsGetName(), SCIPconsIsModifiable(), SCIPdebugMessage, SCIPdelConsLocal(), SCIPincConsAge(), SCIPinferBinvarCons(), SCIPinRepropagation(), SCIPisFeasEQ(), SCIPresetConsAge(), SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetUbLocal(), and TRUE.

Referenced by analyzeConflictOne(), SCIP_DECL_CONSPRESOL(), and SCIP_DECL_CONSPROP().

static SCIP_RETCODE resolvePropagation	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_VAR *	infervar,
		PROPRULE	proprule,
		SCIP_BDCHGIDX *	bdchgidx,
		SCIP_RESULT *	result
	)

static

resolves a conflict on the given variable by supplying the variables needed for applying the corresponding propagation rule (see propagateCons()): (1) v_i = TRUE => r = TRUE (2) r = FALSE => v_i = FALSE for all i (3) v_i = FALSE for all i => r = FALSE (4) r = TRUE, v_i = FALSE for all i except j => v_j = TRUE

Parameters

scip	SCIP data structure
cons	constraint that inferred the bound change
infervar	variable that was deduced
proprule	propagation rule that deduced the value
bdchgidx	bound change index (time stamp of bound change), or NULL for current time
result	pointer to store the result of the propagation conflict resolving call

Definition at line 1211 of file cons_or.c.

References FALSE, NULL, PROPRULE_1, PROPRULE_2, PROPRULE_3, PROPRULE_4, PROPRULE_INVALID, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_SUCCESS, SCIPaddConflictBinvar(), SCIPconsGetData(), SCIPconsGetName(), SCIPerrorMessage, SCIPvarGetLbAtIndex(), SCIPvarGetUbAtIndex(), TRUE, and upgradeCons().

Referenced by propagateCons(), and SCIP_DECL_CONSRESPROP().

static SCIP_RETCODE upgradeCons	(	SCIP *	scip,
		SCIP_CONS *	cons,
		int *	nupgdconss
	)

static

upgrades unmodifiable or constraint into an and constraint on negated variables

Parameters

scip	SCIP data structure
cons	constraint that inferred the bound change
nupgdconss	pointer to count the number of constraint upgrades

Definition at line 1297 of file cons_or.c.

References NULL, SCIP_CALL, SCIP_DECL_CONSHDLRCOPY(), SCIP_OKAY, SCIPaddCons(), SCIPallocBufferArray, SCIPconsGetData(), SCIPconsGetName(), SCIPconsIsChecked(), SCIPconsIsDynamic(), SCIPconsIsEnforced(), SCIPconsIsInitial(), SCIPconsIsLocal(), SCIPconsIsModifiable(), SCIPconsIsPropagated(), SCIPconsIsRemovable(), SCIPconsIsSeparated(), SCIPconsIsStickingAtNode(), SCIPcreateConsAnd(), SCIPdebugMessage, SCIPdelCons(), SCIPfreeBufferArray, SCIPgetNegatedVar(), and SCIPreleaseCons().

Referenced by resolvePropagation(), and SCIP_DECL_CONSPRESOL().

static SCIP_DECL_CONSHDLRCOPY ( conshdlrCopyOr )

static

copy method for constraint handler plugins (called when SCIP copies plugins)

Definition at line 1355 of file cons_or.c.

References CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_DECL_CONSFREE(), SCIP_OKAY, SCIPconshdlrGetName(), SCIPincludeConshdlrOr(), and TRUE.

Referenced by upgradeCons().

static SCIP_DECL_CONSFREE ( consFreeOr )

static

destructor of constraint handler to free constraint handler data (called when SCIP is exiting)

Definition at line 1371 of file cons_or.c.

References conshdlrdataFree(), NULL, SCIP_CALL, SCIP_DECL_CONSEXITSOL(), SCIP_OKAY, SCIPconshdlrGetData(), and SCIPconshdlrSetData().

Referenced by SCIP_DECL_CONSHDLRCOPY().

static SCIP_DECL_CONSEXITSOL ( consExitsolOr )

static

solving process deinitialization method of constraint handler (called before branch and bound process data is freed)

Definition at line 1389 of file cons_or.c.

References consdataFreeRows(), SCIP_CALL, SCIP_DECL_CONSDELETE(), SCIP_OKAY, and SCIPconsGetData().

Referenced by SCIP_DECL_CONSFREE().

static SCIP_DECL_CONSDELETE ( consDeleteOr )

static

frees specific constraint data

Definition at line 1407 of file cons_or.c.

References consdataFree(), NULL, SCIP_CALL, SCIP_DECL_CONSTRANS(), SCIP_OKAY, and SCIPconshdlrGetData().

Referenced by SCIP_DECL_CONSEXITSOL().

static SCIP_DECL_CONSTRANS ( consTransOr )

static

transforms constraint data into data belonging to the transformed problem

Definition at line 1422 of file cons_or.c.

References consdataCreate(), NULL, SCIP_CALL, SCIP_DECL_CONSINITLP(), SCIP_OKAY, SCIPconsGetData(), SCIPconsGetName(), SCIPconshdlrGetData(), SCIPconsIsChecked(), SCIPconsIsDynamic(), SCIPconsIsEnforced(), SCIPconsIsInitial(), SCIPconsIsLocal(), SCIPconsIsModifiable(), SCIPconsIsPropagated(), SCIPconsIsRemovable(), SCIPconsIsSeparated(), SCIPconsIsStickingAtNode(), and SCIPcreateCons().

Referenced by SCIP_DECL_CONSDELETE().

static SCIP_DECL_CONSINITLP ( consInitlpOr )

static

LP initialization method of constraint handler (called before the initial LP relaxation at a node is solved)

Definition at line 1451 of file cons_or.c.

References addRelaxation(), SCIP_CALL, SCIP_DECL_CONSSEPALP(), SCIP_OKAY, and SCIPconsIsInitial().

Referenced by SCIP_DECL_CONSTRANS().

static SCIP_DECL_CONSSEPALP ( consSepalpOr )

static

separation method of constraint handler for LP solutions

Definition at line 1467 of file cons_or.c.

References NULL, SCIP_Bool, SCIP_CALL, SCIP_DECL_CONSSEPASOL(), SCIP_DIDNOTFIND, SCIP_OKAY, SCIP_SEPARATED, and separateCons().

Referenced by SCIP_DECL_CONSINITLP().

static SCIP_DECL_CONSSEPASOL ( consSepasolOr )

static

separation method of constraint handler for arbitrary primal solutions

Definition at line 1491 of file cons_or.c.

References SCIP_Bool, SCIP_CALL, SCIP_DECL_CONSENFOLP(), SCIP_DIDNOTFIND, SCIP_OKAY, SCIP_SEPARATED, and separateCons().

Referenced by SCIP_DECL_CONSSEPALP().

static SCIP_DECL_CONSENFOLP ( consEnfolpOr )

static

constraint enforcing method of constraint handler for LP solutions

Definition at line 1515 of file cons_or.c.

References checkCons(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_DECL_CONSENFOPS(), SCIP_FEASIBLE, SCIP_OKAY, SCIP_SEPARATED, and separateCons().

Referenced by SCIP_DECL_CONSSEPASOL().

static SCIP_DECL_CONSENFOPS ( consEnfopsOr )

static

constraint enforcing method of constraint handler for pseudo solutions

Definition at line 1542 of file cons_or.c.

References checkCons(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_DECL_CONSCHECK(), SCIP_FEASIBLE, SCIP_INFEASIBLE, SCIP_OKAY, and TRUE.

Referenced by SCIP_DECL_CONSENFOLP().

static SCIP_DECL_CONSCHECK ( consCheckOr )

static

feasibility check method of constraint handler for integral solutions

Definition at line 1565 of file cons_or.c.

References checkCons(), SCIP_Bool, SCIP_CALL, SCIP_DECL_CONSPROP(), SCIP_FEASIBLE, SCIP_INFEASIBLE, and SCIP_OKAY.

Referenced by SCIP_DECL_CONSENFOPS().

static SCIP_DECL_CONSPROP ( consPropOr )

static

domain propagation method of constraint handler

Definition at line 1588 of file cons_or.c.

References FALSE, NULL, propagateCons(), SCIP_Bool, SCIP_CALL, SCIP_CUTOFF, SCIP_DECL_CONSPRESOL(), SCIP_DIDNOTFIND, SCIP_OKAY, SCIP_REDUCEDDOM, and SCIPconshdlrGetData().

Referenced by SCIP_DECL_CONSCHECK().

static SCIP_DECL_CONSPRESOL ( consPresolOr )

static

presolving method of constraint handler

Definition at line 1621 of file cons_or.c.

References applyFixings(), FALSE, NULL, propagateCons(), SCIP_Bool, SCIP_BOUNDTYPE_LOWER, SCIP_BOUNDTYPE_UPPER, SCIP_CALL, SCIP_CUTOFF, SCIP_DECL_CONSRESPROP(), SCIP_DIDNOTFIND, SCIP_OKAY, SCIP_SUCCESS, SCIPaddVarImplication(), SCIPaggregateVars(), SCIPconsGetData(), SCIPconsGetName(), SCIPconshdlrGetData(), SCIPconsIsActive(), SCIPconsIsDeleted(), SCIPconsIsModifiable(), SCIPdebugMessage, SCIPdelCons(), SCIPdoNotAggr(), SCIPisFeasEQ(), SCIPisStopped(), SCIPvarGetLbGlobal(), SCIPvarGetUbGlobal(), TRUE, and upgradeCons().

Referenced by SCIP_DECL_CONSPROP().

static SCIP_DECL_CONSRESPROP ( consRespropOr )

static

propagation conflict resolving method of constraint handler

Definition at line 1741 of file cons_or.c.

References resolvePropagation(), SCIP_CALL, SCIP_DECL_CONSLOCK(), and SCIP_OKAY.

Referenced by SCIP_DECL_CONSPRESOL().

static SCIP_DECL_CONSLOCK ( consLockOr )

static

variable rounding lock method of constraint handler

Definition at line 1751 of file cons_or.c.

References NULL, SCIP_CALL, SCIP_DECL_CONSPRINT(), SCIP_OKAY, SCIPaddVarLocks(), and SCIPconsGetData().

Referenced by SCIP_DECL_CONSRESPROP().

static SCIP_DECL_CONSPRINT ( consPrintOr )

static

constraint display method of constraint handler

Definition at line 1774 of file cons_or.c.

References consdataPrint(), NULL, SCIP_CALL, SCIP_DECL_CONSCOPY(), SCIP_OKAY, and SCIPconsGetData().

Referenced by SCIP_DECL_CONSLOCK().

static SCIP_DECL_CONSCOPY ( consCopyOr )

static

constraint copying method of constraint handler

Definition at line 1788 of file cons_or.c.

References NULL, SCIP_CALL, SCIP_DECL_CONSPARSE(), SCIP_OKAY, SCIPallocBufferArray, SCIPconsGetName(), SCIPcreateConsOr(), SCIPfreeBufferArray, SCIPgetNVarsOr(), SCIPgetResultantOr(), SCIPgetVarCopy(), SCIPgetVarsOr(), and TRUE.

Referenced by SCIP_DECL_CONSPRINT().

static SCIP_DECL_CONSPARSE ( consParseOr )

static

constraint parsing method of constraint handler

Definition at line 1838 of file cons_or.c.

References FALSE, NULL, SCIP_CALL, SCIP_DECL_CONSGETVARS(), SCIP_OKAY, SCIPallocBufferArray, SCIPcreateConsOr(), SCIPdebugMessage, SCIPduplicateBufferArray, SCIPfreeBufferArray, SCIPparseVarName(), SCIPparseVarsList(), SCIPreallocBufferArray, and SCIPstrtok().

Referenced by SCIP_DECL_CONSCOPY().

static SCIP_DECL_CONSGETVARS ( consGetVarsOr )

static

constraint method of constraint handler which returns the variables (if possible)

Definition at line 1916 of file cons_or.c.

References BMScopyMemoryArray, FALSE, NULL, SCIP_DECL_CONSGETNVARS(), SCIP_OKAY, SCIPconsGetData(), and TRUE.

Referenced by SCIP_DECL_CONSPARSE().

static SCIP_DECL_CONSGETNVARS ( consGetNVarsOr )

static

constraint method of constraint handler which returns the number of variable (if possible)

Definition at line 1937 of file cons_or.c.

References NULL, SCIP_DECL_EVENTEXEC(), SCIP_OKAY, SCIPconsGetData(), and TRUE.

Referenced by SCIP_DECL_CONSGETVARS().

static SCIP_DECL_EVENTEXEC ( eventExecOr )

static

Definition at line 1958 of file cons_or.c.

References FALSE, NULL, SCIP_EVENTTYPE_LBTIGHTENED, SCIP_OKAY, SCIPeventGetType(), and SCIPincludeConshdlrOr().

Referenced by SCIP_DECL_CONSGETNVARS().

SCIP_RETCODE SCIPincludeConshdlrOr ( SCIP * scip )

creates the handler for or constraints and includes it in SCIP

Parameters

scip	SCIP data structure

Definition at line 1984 of file cons_or.c.

References CONSHDLR_CHECKPRIORITY, CONSHDLR_DELAYPROP, CONSHDLR_DELAYSEPA, CONSHDLR_DESC, CONSHDLR_EAGERFREQ, CONSHDLR_ENFOPRIORITY, CONSHDLR_MAXPREROUNDS, CONSHDLR_NAME, CONSHDLR_NEEDSCONS, CONSHDLR_PRESOLTIMING, CONSHDLR_PROP_TIMING, CONSHDLR_PROPFREQ, CONSHDLR_SEPAFREQ, CONSHDLR_SEPAPRIORITY, conshdlrdataCreate(), EVENTHDLR_DESC, EVENTHDLR_NAME, NULL, SCIP_CALL, SCIP_OKAY, SCIPcreateConsOr(), SCIPincludeConshdlrBasic(), SCIPincludeEventhdlrBasic(), SCIPsetConshdlrCopy(), SCIPsetConshdlrDelete(), SCIPsetConshdlrExitsol(), SCIPsetConshdlrFree(), SCIPsetConshdlrGetNVars(), SCIPsetConshdlrGetVars(), SCIPsetConshdlrInitlp(), SCIPsetConshdlrParse(), SCIPsetConshdlrPresol(), SCIPsetConshdlrPrint(), SCIPsetConshdlrProp(), SCIPsetConshdlrResprop(), SCIPsetConshdlrSepa(), and SCIPsetConshdlrTrans().

Referenced by SCIP_DECL_CONSHDLRCOPY(), SCIP_DECL_EVENTEXEC(), and SCIPincludeDefaultPlugins().

SCIP_RETCODE SCIPcreateConsOr	(	SCIP *	scip,
		SCIP_CONS **	cons,
		const char *	name,
		SCIP_VAR *	resvar,
		int	nvars,
		SCIP_VAR **	vars,
		SCIP_Bool	initial,
		SCIP_Bool	separate,
		SCIP_Bool	enforce,
		SCIP_Bool	check,
		SCIP_Bool	propagate,
		SCIP_Bool	local,
		SCIP_Bool	modifiable,
		SCIP_Bool	dynamic,
		SCIP_Bool	removable,
		SCIP_Bool	stickingatnode
	)

creates and captures an or constraint

Note: the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

Parameters

scip	SCIP data structure
cons	pointer to hold the created constraint
name	name of constraint
resvar	resultant variable of the operation
nvars	number of operator variables in the constraint
vars	array with operator variables of constraint
initial	should the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separate	should the constraint be separated during LP processing? Usually set to TRUE.
enforce	should the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
check	should the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagate	should the constraint be propagated during node processing? Usually set to TRUE.
local	is constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiable	is constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamic	is constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removable	should the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnode	should the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 2032 of file cons_or.c.

References consdataCreate(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPconshdlrGetData(), SCIPcreateCons(), SCIPcreateConsBasicOr(), SCIPerrorMessage, and SCIPfindConshdlr().

Referenced by CREATE_CONSTRAINT(), SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSPARSE(), SCIPcreateConsBasicOr(), and SCIPincludeConshdlrOr().

SCIP_RETCODE SCIPcreateConsBasicOr	(	SCIP *	scip,
		SCIP_CONS **	cons,
		const char *	name,
		SCIP_VAR *	resvar,
		int	nvars,
		SCIP_VAR **	vars
	)

creates and captures an or constraint in its most basic variant, i. e., with all constraint flags set to their default values

Note: the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

Parameters

scip	SCIP data structure
cons	pointer to hold the created constraint
name	name of constraint
resvar	resultant variable of the operation
nvars	number of operator variables in the constraint
vars	array with operator variables of constraint

Definition at line 2094 of file cons_or.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcreateConsOr(), SCIPgetNVarsOr(), and TRUE.

Referenced by SCIPcreateConsOr().

int SCIPgetNVarsOr	(	SCIP *	scip,
		SCIP_CONS *	cons
	)

gets number of variables in or constraint

Parameters

scip	SCIP data structure
cons	constraint data

Definition at line 2110 of file cons_or.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetVarsOr().

Referenced by SCIP_DECL_CONSCOPY(), and SCIPcreateConsBasicOr().

SCIP_VAR** SCIPgetVarsOr	(	SCIP *	scip,
		SCIP_CONS *	cons
	)

gets array of variables in or constraint

Parameters

scip	SCIP data structure
cons	constraint data

Definition at line 2131 of file cons_or.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetResultantOr().

Referenced by SCIP_DECL_CONSCOPY(), and SCIPgetNVarsOr().

SCIP_VAR* SCIPgetResultantOr	(	SCIP *	scip,
		SCIP_CONS *	cons
	)

gets the resultant variable in or constraint

Parameters

scip	SCIP data structure
cons	constraint data

Definition at line 2152 of file cons_or.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by SCIP_DECL_CONSCOPY(), and SCIPgetVarsOr().

SCIP

Detailed Description

Macros

Typedefs

Enumerations

Functions

Macro Definition Documentation

Typedef Documentation

Enumeration Type Documentation

Function Documentation