cons_or.c File Reference

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 "blockmemshell/memory.h"
#include "scip/cons_and.h"
#include "scip/cons_or.h"
#include "scip/pub_cons.h"
#include "scip/pub_event.h"
#include "scip/pub_lp.h"
#include "scip/pub_message.h"
#include "scip/pub_misc.h"
#include "scip/pub_var.h"
#include "scip/scip_conflict.h"
#include "scip/scip_cons.h"
#include "scip/scip_copy.h"
#include "scip/scip_cut.h"
#include "scip/scip_event.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_prob.h"
#include "scip/scip_probing.h"
#include "scip/scip_sol.h"
#include "scip/scip_tree.h"
#include "scip/scip_var.h"
#include "scip/symmetry_graph.h"
#include "symmetry/struct_symmetry.h"
#include <string.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_INVALID = 0 ,   PROPRULE_1 = 1 ,   PROPRULE_2 = 2 ,   PROPRULE_3 = 3 ,   PROPRULE_4 = 4 ,   PROPRULE_0_INVALID = 0 ,   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 = 0 ,   PROPRULE_2 = 1 ,   PROPRULE_3 = 2 ,   PROPRULE_4 = 3 ,   PROPRULE_INVALID = 4 ,   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 void	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, SCIP_Bool *infeasible)
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_RETCODE	addSymmetryInformation (SCIP *scip, SYM_SYMTYPE symtype, SCIP_CONS *cons, SYM_GRAPH *graph, SCIP_Bool *success)
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_CONSENFORELAX (consEnforelaxOr)
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_CONSGETPERMSYMGRAPH (consGetPermsymGraphOr)
static	SCIP_DECL_CONSGETSIGNEDPERMSYMGRAPH (consGetSignedPermsymGraphOr)
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

CONSHDLR_NAME

#define CONSHDLR_NAME   "or"

Definition at line 74 of file cons_or.c.

CONSHDLR_DESC

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

Definition at line 75 of file cons_or.c.

CONSHDLR_SEPAPRIORITY

#define CONSHDLR_SEPAPRIORITY   +850000

priority of the constraint handler for separation

Definition at line 76 of file cons_or.c.

CONSHDLR_ENFOPRIORITY

#define CONSHDLR_ENFOPRIORITY   -850000

priority of the constraint handler for constraint enforcing

Definition at line 77 of file cons_or.c.

CONSHDLR_CHECKPRIORITY

#define CONSHDLR_CHECKPRIORITY   -850000

priority of the constraint handler for checking feasibility

Definition at line 78 of file cons_or.c.

CONSHDLR_SEPAFREQ

#define CONSHDLR_SEPAFREQ   0

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

Definition at line 79 of file cons_or.c.

CONSHDLR_PROPFREQ

#define CONSHDLR_PROPFREQ   1

frequency for propagating domains; zero means only preprocessing propagation

Definition at line 80 of file cons_or.c.

CONSHDLR_EAGERFREQ

#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 82 of file cons_or.c.

CONSHDLR_MAXPREROUNDS

#define CONSHDLR_MAXPREROUNDS   -1

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

Definition at line 83 of file cons_or.c.

CONSHDLR_DELAYSEPA

#define CONSHDLR_DELAYSEPA   FALSE

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

Definition at line 84 of file cons_or.c.

CONSHDLR_DELAYPROP

#define CONSHDLR_DELAYPROP   FALSE

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

Definition at line 85 of file cons_or.c.

CONSHDLR_NEEDSCONS

#define CONSHDLR_NEEDSCONS   TRUE

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

Definition at line 86 of file cons_or.c.

CONSHDLR_PROP_TIMING

#define CONSHDLR_PROP_TIMING   SCIP_PROPTIMING_BEFORELP

propagation timing mask of the constraint handler

Definition at line 88 of file cons_or.c.

CONSHDLR_PRESOLTIMING

#define CONSHDLR_PRESOLTIMING   SCIP_PRESOLTIMING_MEDIUM

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

Definition at line 89 of file cons_or.c.

EVENTHDLR_NAME

#define EVENTHDLR_NAME   "or"

Definition at line 91 of file cons_or.c.

EVENTHDLR_DESC

#define EVENTHDLR_DESC   "event handler for or constraints"

Definition at line 92 of file cons_or.c.

Typedef Documentation

PROPRULE

typedef enum Proprule PROPRULE

Definition at line 137 of file cons_or.c.

Enumeration Type Documentation

Proprule

enum Proprule

Enumerator
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_0_INVALID	invalid inference information
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 129 of file cons_or.c.

Function Documentation

lockRounding()

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 146 of file cons_or.c.

References SCIP_CALL, SCIP_LOCKTYPE_CONFLICT, SCIP_OKAY, SCIPconsIsLockedType(), SCIPlockVarCons(), and TRUE.

Referenced by addCoef().

unlockRounding()

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 162 of file cons_or.c.

References SCIP_CALL, SCIP_LOCKTYPE_CONFLICT, SCIP_OKAY, SCIPconsIsLockedType(), SCIPunlockVarCons(), and TRUE.

Referenced by delCoefPos().

conshdlrdataCreate()

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 178 of file cons_or.c.

References NULL, SCIP_CALL, SCIP_OKAY, and SCIPallocBlockMemory.

Referenced by SCIPincludeConshdlrOr().

conshdlrdataFree()

static void 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 198 of file cons_or.c.

References NULL, and SCIPfreeBlockMemory.

Referenced by SCIP_DECL_CONSFREE().

consdataGetNRows()

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 211 of file cons_or.c.

References NULL.

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

consdataCatchWatchedEvents()

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 222 of file cons_or.c.

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

Referenced by consdataSwitchWatchedvars().

consdataDropWatchedEvents()

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 246 of file cons_or.c.

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

Referenced by consdataSwitchWatchedvars().

consdataCatchEvents()

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 269 of file cons_or.c.

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

Referenced by consdataCreate().

consdataDropEvents()

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 295 of file cons_or.c.

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

Referenced by consdataFree().

consdataSwitchWatchedvars()

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 321 of file cons_or.c.

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

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

consdataEnsureVarsSize()

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 381 of file cons_or.c.

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

Referenced by addCoef().

consdataCreate()

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 405 of file cons_or.c.

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

Referenced by SCIP_DECL_CONSTRANS(), and SCIPcreateConsOr().

consdataFreeRows()

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 449 of file cons_or.c.

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

Referenced by consdataFree(), and SCIP_DECL_CONSEXITSOL().

consdataFree()

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 476 of file cons_or.c.

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

Referenced by SCIP_DECL_CONSDELETE().

consdataPrint()

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 510 of file cons_or.c.

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

Referenced by applyFixings(), and SCIP_DECL_CONSPRINT().

addCoef()

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 535 of file cons_or.c.

References consdataEnsureVarsSize(), 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().

delCoefPos()

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 589 of file cons_or.c.

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

Referenced by applyFixings().

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 647 of file cons_or.c.

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

Referenced by SCIP_DECL_CONSPRESOL().

createRelaxation()

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 706 of file cons_or.c.

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

Referenced by addRelaxation(), and separateCons().

addRelaxation()

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

static

adds linear relaxation of or constraint to the LP

Parameters

scip	SCIP data structure
cons	constraint to check
infeasible	pointer to store whether an infeasibility was detected

Definition at line 749 of file cons_or.c.

References consdataGetNRows(), createRelaxation(), FALSE, NULL, r, SCIP_CALL, SCIP_OKAY, SCIPaddRow(), SCIPconsGetData(), and SCIProwIsInLP().

Referenced by SCIP_DECL_CONSINITLP().

checkCons()

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 783 of file cons_or.c.

References consdataGetNRows(), FALSE, MAX3, NULL, r, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPconsGetData(), SCIPgetSolVal(), SCIPincConsAge(), SCIPinfoMessage(), SCIPisFeasPositive(), SCIPprintCons(), SCIPresetConsAge(), SCIProwIsInLP(), SCIPupdateSolConsViolation(), SCIPvarGetName(), and TRUE.

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

separateCons()

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 899 of file cons_or.c.

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

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

analyzeConflictZero()

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 949 of file cons_or.c.

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

Referenced by propagateCons().

analyzeConflictOne()

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 981 of file cons_or.c.

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

Referenced by propagateCons().

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 1022 of file cons_or.c.

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

Referenced by SCIP_DECL_CONSPRESOL(), and SCIP_DECL_CONSPROP().

resolvePropagation()

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 1261 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, SCIPgetVarLbAtIndex(), SCIPgetVarUbAtIndex(), and TRUE.

Referenced by SCIP_DECL_CONSRESPROP().

upgradeCons()

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 1347 of file cons_or.c.

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

Referenced by SCIP_DECL_CONSPRESOL().

addSymmetryInformation()

static SCIP_RETCODE addSymmetryInformation ( SCIP *  scip, SYM_SYMTYPE  symtype, SCIP_CONS *  cons, SYM_GRAPH *  graph, SCIP_Bool *  success  )

static

adds symmetry information of constraint to a symmetry detection graph

Parameters

scip	SCIP pointer
symtype	type of symmetries that need to be added
cons	constraint
graph	symmetry detection graph
success	pointer to store whether symmetry information could be added

Definition at line 1400 of file cons_or.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPallocBufferArray, SCIPconsGetData(), SCIPextendPermsymDetectionGraphLinear(), SCIPfreeBufferArray, SCIPgetNVars(), SCIPgetNVarsOr(), SCIPgetResultantOr(), SCIPgetSymActiveVariables(), SCIPgetVarsOr(), and SCIPisTransformed().

Referenced by SCIP_DECL_CONSGETPERMSYMGRAPH(), and SCIP_DECL_CONSGETSIGNEDPERMSYMGRAPH().

SCIP_DECL_CONSHDLRCOPY()

static SCIP_DECL_CONSHDLRCOPY ( conshdlrCopyOr  )

static

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

Definition at line 1464 of file cons_or.c.

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

SCIP_DECL_CONSFREE()

static SCIP_DECL_CONSFREE ( consFreeOr  )

static

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

Definition at line 1480 of file cons_or.c.

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

SCIP_DECL_CONSEXITSOL()

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 1498 of file cons_or.c.

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

SCIP_DECL_CONSDELETE()

static SCIP_DECL_CONSDELETE ( consDeleteOr  )

static

frees specific constraint data

Definition at line 1516 of file cons_or.c.

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

SCIP_DECL_CONSTRANS()

static SCIP_DECL_CONSTRANS ( consTransOr  )

static

transforms constraint data into data belonging to the transformed problem

Definition at line 1531 of file cons_or.c.

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

SCIP_DECL_CONSINITLP()

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 1560 of file cons_or.c.

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

SCIP_DECL_CONSSEPALP()

static SCIP_DECL_CONSSEPALP ( consSepalpOr  )

static

separation method of constraint handler for LP solutions

Definition at line 1578 of file cons_or.c.

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

SCIP_DECL_CONSSEPASOL()

static SCIP_DECL_CONSSEPASOL ( consSepasolOr  )

static

separation method of constraint handler for arbitrary primal solutions

Definition at line 1602 of file cons_or.c.

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

SCIP_DECL_CONSENFOLP()

static SCIP_DECL_CONSENFOLP ( consEnfolpOr  )

static

constraint enforcing method of constraint handler for LP solutions

Definition at line 1626 of file cons_or.c.

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

SCIP_DECL_CONSENFORELAX()

static SCIP_DECL_CONSENFORELAX ( consEnforelaxOr  )

static

constraint enforcing method of constraint handler for relaxation solutions

Definition at line 1660 of file cons_or.c.

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

SCIP_DECL_CONSENFOPS()

static SCIP_DECL_CONSENFOPS ( consEnfopsOr  )

static

constraint enforcing method of constraint handler for pseudo solutions

Definition at line 1694 of file cons_or.c.

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

SCIP_DECL_CONSCHECK()

static SCIP_DECL_CONSCHECK ( consCheckOr  )

static

feasibility check method of constraint handler or

Definition at line 1716 of file cons_or.c.

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

SCIP_DECL_CONSPROP()

static SCIP_DECL_CONSPROP ( consPropOr  )

static

domain propagation method of constraint handler

Definition at line 1735 of file cons_or.c.

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

SCIP_DECL_CONSPRESOL()

static SCIP_DECL_CONSPRESOL ( consPresolOr  )

static

presolving method of constraint handler

Definition at line 1768 of file cons_or.c.

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

SCIP_DECL_CONSRESPROP()

static SCIP_DECL_CONSRESPROP ( consRespropOr  )

static

propagation conflict resolving method of constraint handler

Definition at line 1888 of file cons_or.c.

References resolvePropagation(), SCIP_CALL, and SCIP_OKAY.

SCIP_DECL_CONSLOCK()

static SCIP_DECL_CONSLOCK ( consLockOr  )

static

variable rounding lock method of constraint handler

Definition at line 1898 of file cons_or.c.

References NULL, SCIP_CALL, SCIP_LOCKTYPE_MODEL, SCIP_OKAY, SCIPaddVarLocksType(), and SCIPconsGetData().

SCIP_DECL_CONSPRINT()

static SCIP_DECL_CONSPRINT ( consPrintOr  )

static

constraint display method of constraint handler

Definition at line 1923 of file cons_or.c.

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

SCIP_DECL_CONSCOPY()

static SCIP_DECL_CONSCOPY ( consCopyOr  )

static

constraint copying method of constraint handler

Definition at line 1936 of file cons_or.c.

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

SCIP_DECL_CONSPARSE()

static SCIP_DECL_CONSPARSE ( consParseOr  )

static

constraint parsing method of constraint handler

Definition at line 1989 of file cons_or.c.

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

SCIP_DECL_CONSGETVARS()

static SCIP_DECL_CONSGETVARS ( consGetVarsOr  )

static

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

Definition at line 2068 of file cons_or.c.

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

SCIP_DECL_CONSGETNVARS()

static SCIP_DECL_CONSGETNVARS ( consGetNVarsOr  )

static

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

Definition at line 2089 of file cons_or.c.

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

SCIP_DECL_CONSGETPERMSYMGRAPH()

static SCIP_DECL_CONSGETPERMSYMGRAPH ( consGetPermsymGraphOr  )

static

constraint handler method which returns the permutation symmetry detection graph of a constraint

Definition at line 2106 of file cons_or.c.

References addSymmetryInformation(), SCIP_CALL, SCIP_OKAY, and SYM_SYMTYPE_PERM.

SCIP_DECL_CONSGETSIGNEDPERMSYMGRAPH()

static SCIP_DECL_CONSGETSIGNEDPERMSYMGRAPH ( consGetSignedPermsymGraphOr  )

static

constraint handler method which returns the signed permutation symmetry detection graph of a constraint

Definition at line 2115 of file cons_or.c.

References addSymmetryInformation(), SCIP_CALL, SCIP_OKAY, and SYM_SYMTYPE_SIGNPERM.

SCIP_DECL_EVENTEXEC()

static SCIP_DECL_EVENTEXEC ( eventExecOr  )

static

Definition at line 2127 of file cons_or.c.

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