SCIP
Solving Constraint Integer Programs
Detailed Description
LP diving heuristic that fixes variables with integral LP value.
Definition in file heur_intdiving.c.
#include "blockmemshell/memory.h"#include "scip/heur_intdiving.h"#include "scip/pub_heur.h"#include "scip/pub_lp.h"#include "scip/pub_message.h"#include "scip/pub_var.h"#include "scip/scip_branch.h"#include "scip/scip_general.h"#include "scip/scip_heur.h"#include "scip/scip_lp.h"#include "scip/scip_mem.h"#include "scip/scip_message.h"#include "scip/scip_numerics.h"#include "scip/scip_param.h"#include "scip/scip_prob.h"#include "scip/scip_probing.h"#include "scip/scip_sol.h"#include "scip/scip_solvingstats.h"#include "scip/scip_tree.h"#include "scip/scip_var.h"#include <string.h>Go to the source code of this file.
Macros | |
| #define | HEUR_NAME "intdiving" |
| #define | HEUR_DESC "LP diving heuristic that fixes binary variables with large LP value to one" |
| #define | HEUR_DISPCHAR 'n' |
| #define | HEUR_PRIORITY -1003500 |
| #define | HEUR_FREQ -1 |
| #define | HEUR_FREQOFS 9 |
| #define | HEUR_MAXDEPTH -1 |
| #define | HEUR_TIMING SCIP_HEURTIMING_AFTERLPPLUNGE |
| #define | HEUR_USESSUBSCIP FALSE |
| #define | DEFAULT_MINRELDEPTH 0.0 |
| #define | DEFAULT_MAXRELDEPTH 1.0 |
| #define | DEFAULT_MAXLPITERQUOT 0.05 |
| #define | DEFAULT_MAXLPITEROFS 1000 |
| #define | DEFAULT_MAXDIVEUBQUOT 0.8 |
| #define | DEFAULT_MAXDIVEAVGQUOT 0.0 |
| #define | DEFAULT_MAXDIVEUBQUOTNOSOL 0.1 |
| #define | DEFAULT_MAXDIVEAVGQUOTNOSOL 0.0 |
| #define | DEFAULT_BACKTRACK TRUE |
| #define | MINLPITER 10000 |
Functions | |
| static | SCIP_DECL_HEURCOPY (heurCopyIntdiving) |
| static | SCIP_DECL_HEURFREE (heurFreeIntdiving) |
| static | SCIP_DECL_HEURINIT (heurInitIntdiving) |
| static | SCIP_DECL_HEUREXIT (heurExitIntdiving) |
| static | SCIP_DECL_HEUREXEC (heurExecIntdiving) |
| SCIP_RETCODE | SCIPincludeHeurIntdiving (SCIP *scip) |
Macro Definition Documentation
◆ HEUR_NAME
| #define HEUR_NAME "intdiving" |
Definition at line 45 of file heur_intdiving.c.
Referenced by SCIPincludeHeurIntdiving().
◆ HEUR_DESC
| #define HEUR_DESC "LP diving heuristic that fixes binary variables with large LP value to one" |
Definition at line 46 of file heur_intdiving.c.
Referenced by SCIPincludeHeurIntdiving().
◆ HEUR_DISPCHAR
| #define HEUR_DISPCHAR 'n' |
Definition at line 47 of file heur_intdiving.c.
Referenced by SCIPincludeHeurIntdiving().
◆ HEUR_PRIORITY
| #define HEUR_PRIORITY -1003500 |
Definition at line 48 of file heur_intdiving.c.
Referenced by SCIPincludeHeurIntdiving().
◆ HEUR_FREQ
| #define HEUR_FREQ -1 |
Definition at line 49 of file heur_intdiving.c.
Referenced by SCIPincludeHeurIntdiving().
◆ HEUR_FREQOFS
| #define HEUR_FREQOFS 9 |
Definition at line 50 of file heur_intdiving.c.
Referenced by SCIPincludeHeurIntdiving().
◆ HEUR_MAXDEPTH
| #define HEUR_MAXDEPTH -1 |
Definition at line 51 of file heur_intdiving.c.
Referenced by SCIPincludeHeurIntdiving().
◆ HEUR_TIMING
| #define HEUR_TIMING SCIP_HEURTIMING_AFTERLPPLUNGE |
Definition at line 52 of file heur_intdiving.c.
Referenced by SCIPincludeHeurIntdiving().
◆ HEUR_USESSUBSCIP
| #define HEUR_USESSUBSCIP FALSE |
does the heuristic use a secondary SCIP instance?
Definition at line 53 of file heur_intdiving.c.
Referenced by SCIPincludeHeurIntdiving().
◆ DEFAULT_MINRELDEPTH
| #define DEFAULT_MINRELDEPTH 0.0 |
minimal relative depth to start diving
Definition at line 60 of file heur_intdiving.c.
Referenced by SCIPincludeHeurIntdiving().
◆ DEFAULT_MAXRELDEPTH
| #define DEFAULT_MAXRELDEPTH 1.0 |
maximal relative depth to start diving
Definition at line 61 of file heur_intdiving.c.
Referenced by SCIPincludeHeurIntdiving().
◆ DEFAULT_MAXLPITERQUOT
| #define DEFAULT_MAXLPITERQUOT 0.05 |
maximal fraction of diving LP iterations compared to node LP iterations
Definition at line 62 of file heur_intdiving.c.
Referenced by SCIPincludeHeurIntdiving().
◆ DEFAULT_MAXLPITEROFS
| #define DEFAULT_MAXLPITEROFS 1000 |
additional number of allowed LP iterations
Definition at line 63 of file heur_intdiving.c.
Referenced by SCIPincludeHeurIntdiving().
◆ DEFAULT_MAXDIVEUBQUOT
| #define DEFAULT_MAXDIVEUBQUOT 0.8 |
maximal quotient (curlowerbound - lowerbound)/(cutoffbound - lowerbound) where diving is performed (0.0: no limit)
Definition at line 64 of file heur_intdiving.c.
Referenced by SCIPincludeHeurIntdiving().
◆ DEFAULT_MAXDIVEAVGQUOT
| #define DEFAULT_MAXDIVEAVGQUOT 0.0 |
maximal quotient (curlowerbound - lowerbound)/(avglowerbound - lowerbound) where diving is performed (0.0: no limit)
Definition at line 67 of file heur_intdiving.c.
Referenced by SCIPincludeHeurIntdiving().
◆ DEFAULT_MAXDIVEUBQUOTNOSOL
| #define DEFAULT_MAXDIVEUBQUOTNOSOL 0.1 |
maximal UBQUOT when no solution was found yet (0.0: no limit)
Definition at line 70 of file heur_intdiving.c.
Referenced by SCIPincludeHeurIntdiving().
◆ DEFAULT_MAXDIVEAVGQUOTNOSOL
| #define DEFAULT_MAXDIVEAVGQUOTNOSOL 0.0 |
maximal AVGQUOT when no solution was found yet (0.0: no limit)
Definition at line 71 of file heur_intdiving.c.
Referenced by SCIPincludeHeurIntdiving().
◆ DEFAULT_BACKTRACK
| #define DEFAULT_BACKTRACK TRUE |
use one level of backtracking if infeasibility is encountered?
Definition at line 72 of file heur_intdiving.c.
Referenced by SCIPincludeHeurIntdiving().
◆ MINLPITER
| #define MINLPITER 10000 |
minimal number of LP iterations allowed in each LP solving call
Definition at line 74 of file heur_intdiving.c.
Function Documentation
◆ SCIP_DECL_HEURCOPY()
|
static |
copy method for primal heuristic plugins (called when SCIP copies plugins)
Definition at line 108 of file heur_intdiving.c.
◆ SCIP_DECL_HEURFREE()
|
static |
destructor of primal heuristic to free user data (called when SCIP is exiting)
Definition at line 122 of file heur_intdiving.c.
◆ SCIP_DECL_HEURINIT()
|
static |
initialization method of primal heuristic (called after problem was transformed)
Definition at line 142 of file heur_intdiving.c.
◆ SCIP_DECL_HEUREXIT()
|
static |
deinitialization method of primal heuristic (called before transformed problem is freed)
Definition at line 166 of file heur_intdiving.c.
◆ SCIP_DECL_HEUREXEC()
|
static |
execution method of primal heuristic
Definition at line 186 of file heur_intdiving.c.