Scippy

SCIP

Solving Constraint Integer Programs

scip_benders.h
Go to the documentation of this file.
1 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
2 /* */
3 /* This file is part of the program and library */
4 /* SCIP --- Solving Constraint Integer Programs */
5 /* */
6 /* Copyright (c) 2002-2023 Zuse Institute Berlin (ZIB) */
7 /* */
8 /* Licensed under the Apache License, Version 2.0 (the "License"); */
9 /* you may not use this file except in compliance with the License. */
10 /* You may obtain a copy of the License at */
11 /* */
12 /* http://www.apache.org/licenses/LICENSE-2.0 */
13 /* */
14 /* Unless required by applicable law or agreed to in writing, software */
15 /* distributed under the License is distributed on an "AS IS" BASIS, */
16 /* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
17 /* See the License for the specific language governing permissions and */
18 /* limitations under the License. */
19 /* */
20 /* You should have received a copy of the Apache-2.0 license */
21 /* along with SCIP; see the file LICENSE. If not visit scipopt.org. */
22 /* */
23 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
24 
25 /**@file scip_benders.h
26  * @ingroup PUBLICCOREAPI
27  * @brief public methods for Benders decomposition
28  * @author Tobias Achterberg
29  * @author Timo Berthold
30  * @author Thorsten Koch
31  * @author Alexander Martin
32  * @author Marc Pfetsch
33  * @author Kati Wolter
34  * @author Gregor Hendel
35  * @author Leona Gottwald
36  */
37 
38 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
39 
40 #ifndef __SCIP_SCIP_BENDERS_H__
41 #define __SCIP_SCIP_BENDERS_H__
42 
43 
44 #include "scip/def.h"
45 #include "scip/type_benderscut.h"
46 #include "scip/type_benders.h"
47 #include "scip/type_cons.h"
48 #include "scip/type_lp.h"
49 #include "scip/type_misc.h"
50 #include "scip/type_result.h"
51 #include "scip/type_retcode.h"
52 #include "scip/type_scip.h"
53 #include "scip/type_sol.h"
54 #include "scip/type_var.h"
55 
56 #ifdef __cplusplus
57 extern "C" {
58 #endif
59 
60 /**@addtogroup PublicBendersMethods
61  *
62  * @{
63  */
64 
65 /** creates a Benders' decomposition and includes it in SCIP
66  *
67  * To use the Benders' decomposition for solving a problem, it first has to be activated with a call to SCIPactivateBenders().
68  * This should be done during the problem creation stage.
69  *
70  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
71  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
72  *
73  * @pre This method can be called if SCIP is in one of the following stages:
74  * - \ref SCIP_STAGE_INIT
75  * - \ref SCIP_STAGE_PROBLEM
76  *
77  * @note method has all Benders' decomposition callbacks as arguments and is thus changed every time a new callback is
78  * added in future releases; consider using SCIPincludeBendersBasic() and setter functions
79  * if you seek for a method which is less likely to change in future releases
80  */
81 SCIP_EXPORT
83  SCIP* scip, /**< SCIP data structure */
84  const char* name, /**< name of Benders' decomposition */
85  const char* desc, /**< description of Benders' decomposition */
86  int priority, /**< priority of the Benders' decomposition */
87  SCIP_Bool cutlp, /**< should Benders' cuts be generated for LP solutions */
88  SCIP_Bool cutpseudo, /**< should Benders' cuts be generated for pseudo solutions */
89  SCIP_Bool cutrelax, /**< should Benders' cuts be generated for relaxation solutions */
90  SCIP_Bool shareauxvars, /**< should this Benders' use the highest priority Benders aux vars */
91  SCIP_DECL_BENDERSCOPY ((*benderscopy)), /**< copy method of Benders' decomposition or NULL if you don't want to copy your plugin into sub-SCIPs */
92  SCIP_DECL_BENDERSFREE ((*bendersfree)), /**< destructor of Benders' decomposition */
93  SCIP_DECL_BENDERSINIT ((*bendersinit)), /**< initialize Benders' decomposition */
94  SCIP_DECL_BENDERSEXIT ((*bendersexit)), /**< deinitialize Benders' decomposition */
95  SCIP_DECL_BENDERSINITPRE((*bendersinitpre)),/**< presolving initialization method for Benders' decomposition */
96  SCIP_DECL_BENDERSEXITPRE((*bendersexitpre)),/**< presolving deinitialization method for Benders' decomposition */
97  SCIP_DECL_BENDERSINITSOL((*bendersinitsol)),/**< solving process initialization method of Benders' decomposition */
98  SCIP_DECL_BENDERSEXITSOL((*bendersexitsol)),/**< solving process deinitialization method of Benders' decomposition */
99  SCIP_DECL_BENDERSGETVAR((*bendersgetvar)),/**< returns the master variable for a given subproblem variable */
100  SCIP_DECL_BENDERSCREATESUB((*benderscreatesub)),/**< creates a Benders' decomposition subproblem */
101  SCIP_DECL_BENDERSPRESUBSOLVE((*benderspresubsolve)),/**< the execution method of the Benders' decomposition algorithm */
102  SCIP_DECL_BENDERSSOLVESUBCONVEX((*benderssolvesubconvex)),/**< the solving method for convex Benders' decomposition subproblems */
103  SCIP_DECL_BENDERSSOLVESUB((*benderssolvesub)),/**< the solving method for the Benders' decomposition subproblems */
104  SCIP_DECL_BENDERSPOSTSOLVE((*benderspostsolve)),/**< called after the subproblems are solved. */
105  SCIP_DECL_BENDERSFREESUB((*bendersfreesub)),/**< the freeing method for the Benders' decomposition subproblems */
106  SCIP_BENDERSDATA* bendersdata /**< Benders' decomposition data */
107  );
108 
109 /** creates a Benders' decomposition and includes it in SCIP with all non-fundamental callbacks set to NULL
110  *
111  * If needed, the non-fundamental callbacks can be added afterwards via setter functions SCIPsetBendersCopy(),
112  * SCIPsetBendersFree(), SCIPsetBendersInity(), SCIPsetBendersExit(), SCIPsetBendersInitsol(), SCIPsetBendersExitsol(),
113  * SCIPsetBendersFarkas().
114  *
115  * To use the Benders' decomposition for solving a problem, it first has to be activated with a call to SCIPactivateBenders().
116  * This should be done during the problem creation stage.
117  *
118  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
119  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
120  *
121  * @pre This method can be called if SCIP is in one of the following stages:
122  * - \ref SCIP_STAGE_INIT
123  * - \ref SCIP_STAGE_PROBLEM
124  *
125  * @note if you want to set all callbacks with a single method call, consider using SCIPincludeBenders() instead
126  */
127 SCIP_EXPORT
129  SCIP* scip, /**< SCIP data structure */
130  SCIP_BENDERS** bendersptr, /**< reference to a benders, or NULL */
131  const char* name, /**< name of Benders' decomposition */
132  const char* desc, /**< description of Benders' decomposition */
133  int priority, /**< priority of the Benders' decomposition */
134  SCIP_Bool cutlp, /**< should Benders' cuts be generated for LP solutions */
135  SCIP_Bool cutpseudo, /**< should Benders' cuts be generated for pseudo solutions */
136  SCIP_Bool cutrelax, /**< should Benders' cuts be generated for relaxation solutions */
137  SCIP_Bool shareauxvars, /**< should this Benders' use the highest priority Benders aux vars */
138  SCIP_DECL_BENDERSGETVAR((*bendersgetvar)),/**< returns the master variable for a given subproblem variable */
139  SCIP_DECL_BENDERSCREATESUB((*benderscreatesub)),/**< creates a Benders' decomposition subproblem */
140  SCIP_BENDERSDATA* bendersdata /**< Benders' decomposition data */
141  );
142 
143 /** sets copy method of benders
144  *
145  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
146  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
147  *
148  * @pre This method can be called if SCIP is in one of the following stages:
149  * - \ref SCIP_STAGE_INIT
150  * - \ref SCIP_STAGE_PROBLEM
151  */
152 SCIP_EXPORT
154  SCIP* scip, /**< SCIP data structure */
155  SCIP_BENDERS* benders, /**< Benders' decomposition */
156  SCIP_DECL_BENDERSCOPY((*benderscopy)) /**< copy method of Benders' decomposition or NULL if you don't want to copy your plugin into sub-SCIPs */
157  );
158 
159 /** sets destructor method of benders
160  *
161  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
162  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
163  *
164  * @pre This method can be called if SCIP is in one of the following stages:
165  * - \ref SCIP_STAGE_INIT
166  * - \ref SCIP_STAGE_PROBLEM
167  */
168 SCIP_EXPORT
170  SCIP* scip, /**< SCIP data structure */
171  SCIP_BENDERS* benders, /**< Benders' decomposition */
172  SCIP_DECL_BENDERSFREE((*bendersfree)) /**< destructor of Benders' decomposition */
173  );
174 
175 /** sets initialization method of benders
176  *
177  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
178  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
179  *
180  * @pre This method can be called if SCIP is in one of the following stages:
181  * - \ref SCIP_STAGE_INIT
182  * - \ref SCIP_STAGE_PROBLEM
183  */
184 SCIP_EXPORT
186  SCIP* scip, /**< SCIP data structure */
187  SCIP_BENDERS* benders, /**< Benders' decomposition */
188  SCIP_DECL_BENDERSINIT ((*bendersinit)) /**< initialize Benders' decomposition */
189  );
190 
191 /** sets deinitialization method of benders
192  *
193  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
194  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
195  *
196  * @pre This method can be called if SCIP is in one of the following stages:
197  * - \ref SCIP_STAGE_INIT
198  * - \ref SCIP_STAGE_PROBLEM
199  */
200 SCIP_EXPORT
202  SCIP* scip, /**< SCIP data structure */
203  SCIP_BENDERS* benders, /**< Benders' decomposition */
204  SCIP_DECL_BENDERSEXIT ((*bendersexit)) /**< deinitialize Benders' decomposition */
205  );
206 
207 /** sets presolving initialization method of benders
208  *
209  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
210  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
211  *
212  * @pre This method can be called if SCIP is in one of the following stages:
213  * - \ref SCIP_STAGE_INIT
214  * - \ref SCIP_STAGE_PROBLEM
215  */
216 SCIP_EXPORT
218  SCIP* scip, /**< SCIP data structure */
219  SCIP_BENDERS* benders, /**< Benders' decomposition */
220  SCIP_DECL_BENDERSINITPRE((*bendersinitpre))/**< presolving initialization method of Benders' decomposition */
221  );
222 
223 /** sets presolving deinitialization method of benders
224  *
225  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
226  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
227  *
228  * @pre This method can be called if SCIP is in one of the following stages:
229  * - \ref SCIP_STAGE_INIT
230  * - \ref SCIP_STAGE_PROBLEM
231  */
232 SCIP_EXPORT
234  SCIP* scip, /**< SCIP data structure */
235  SCIP_BENDERS* benders, /**< Benders' decomposition */
236  SCIP_DECL_BENDERSEXITPRE((*bendersexitpre))/**< presolving deinitialization method of Benders' decomposition */
237  );
238 
239 /** sets solving process initialization method of benders
240  *
241  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
242  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
243  *
244  * @pre This method can be called if SCIP is in one of the following stages:
245  * - \ref SCIP_STAGE_INIT
246  * - \ref SCIP_STAGE_PROBLEM
247  */
248 SCIP_EXPORT
250  SCIP* scip, /**< SCIP data structure */
251  SCIP_BENDERS* benders, /**< Benders' decomposition */
252  SCIP_DECL_BENDERSINITSOL((*bendersinitsol))/**< solving process initialization method of Benders' decomposition */
253  );
254 
255 /** sets solving process deinitialization method of benders
256  *
257  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
258  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
259  *
260  * @pre This method can be called if SCIP is in one of the following stages:
261  * - \ref SCIP_STAGE_INIT
262  * - \ref SCIP_STAGE_PROBLEM
263  */
264 SCIP_EXPORT
266  SCIP* scip, /**< SCIP data structure */
267  SCIP_BENDERS* benders, /**< Benders' decomposition */
268  SCIP_DECL_BENDERSEXITSOL((*bendersexitsol))/**< solving process deinitialization method of Benders' decomposition */
269  );
270 
271 /** sets the method called prior to solving the subproblems for benders
272  *
273  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
274  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
275  *
276  * @pre This method can be called if SCIP is in one of the following stages:
277  * - \ref SCIP_STAGE_INIT
278  * - \ref SCIP_STAGE_PROBLEM
279  */
280 SCIP_EXPORT
282  SCIP* scip, /**< SCIP data structure */
283  SCIP_BENDERS* benders, /**< Benders' decomposition */
284  SCIP_DECL_BENDERSPRESUBSOLVE((*benderspresubsolve))/**< method called prior to solving the subproblems */
285  );
286 
287 /** sets the subproblem solving and freeing methods for Benders' decomposition
288  *
289  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
290  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
291  *
292  * @pre This method can be called if SCIP is in one of the following stages:
293  * - \ref SCIP_STAGE_INIT
294  * - \ref SCIP_STAGE_PROBLEM
295  */
296 SCIP_EXPORT
298  SCIP* scip, /**< SCIP data structure */
299  SCIP_BENDERS* benders, /**< Benders' decomposition */
300  SCIP_DECL_BENDERSSOLVESUBCONVEX((*benderssolvesubconvex)),/**< the solving method for convex Benders' decomposition subproblems */
301  SCIP_DECL_BENDERSSOLVESUB((*benderssolvesub)),/**< solving method for a Benders' decomposition subproblem */
302  SCIP_DECL_BENDERSFREESUB((*bendersfreesub))/**< the subproblem freeing method for Benders' decomposition */
303  );
304 
305 /** sets the post solving methods for benders
306  *
307  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
308  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
309  *
310  * @pre This method can be called if SCIP is in one of the following stages:
311  * - \ref SCIP_STAGE_INIT
312  * - \ref SCIP_STAGE_PROBLEM
313  */
314 SCIP_EXPORT
316  SCIP* scip, /**< SCIP data structure */
317  SCIP_BENDERS* benders, /**< Benders' decomposition */
318  SCIP_DECL_BENDERSPOSTSOLVE((*benderspostsolve))/**< solving process deinitialization method of Benders' decomposition */
319  );
320 
321 /** sets the subproblem comparison method for determining the solving order in Benders' decomposition
322  *
323  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
324  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
325  *
326  * @pre This method can be called if SCIP is in one of the following stages:
327  * - \ref SCIP_STAGE_INIT
328  * - \ref SCIP_STAGE_PROBLEM
329  */
330 SCIP_EXPORT
332  SCIP* scip, /**< SCIP data structure */
333  SCIP_BENDERS* benders, /**< Benders' decomposition */
334  SCIP_DECL_SORTPTRCOMP((*benderssubcomp)) /**< a comparator for defining the solving order of the subproblems */
335  );
336 
337 /** returns the Benders' decomposition of the given name, or NULL if not existing */
338 SCIP_EXPORT
340  SCIP* scip, /**< SCIP data structure */
341  const char* name /**< name of Benders' decomposition */
342  );
343 
344 /** returns the array of currently available Benders' decomposition; active Benders' decomposition are in the first
345  * slots of the array
346  */
347 SCIP_EXPORT
349  SCIP* scip /**< SCIP data structure */
350  );
351 
352 /** returns the number of currently available Benders' decomposition */
353 SCIP_EXPORT
354 int SCIPgetNBenders(
355  SCIP* scip /**< SCIP data structure */
356  );
357 
358 /** returns the number of currently active Benders' decomposition */
359 SCIP_EXPORT
361  SCIP* scip /**< SCIP data structure */
362  );
363 
364 /** activates the Benders' decomposition to be used for the current problem
365  *
366  * This method should be called during the problem creation stage for all pricers that are necessary to solve
367  * the problem model.
368  *
369  * @note The Benders' decompositions are automatically deactivated when the problem is freed.
370  *
371  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
372  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
373  *
374  * @pre This method can be called if SCIP is in one of the following stages:
375  * - \ref SCIP_STAGE_PROBLEM
376  */
377 SCIP_EXPORT
379  SCIP* scip, /**< SCIP data structure */
380  SCIP_BENDERS* benders, /**< the Benders' decomposition structure */
381  int nsubproblems /**< the number of subproblems in the Benders' decomposition */
382  );
383 
384 /** deactivates the Benders' decomposition
385  *
386  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
387  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
388  *
389  * @pre This method can be called if SCIP is in one of the following stages:
390  * - \ref SCIP_STAGE_PROBLEM
391  * - \ref SCIP_STAGE_EXITSOLVE
392  */
393 SCIP_EXPORT
395  SCIP* scip, /**< SCIP data structure */
396  SCIP_BENDERS* benders /**< the Benders' decomposition structure */
397  );
398 
399 /** sets the priority of a Benders' decomposition */
400 SCIP_EXPORT
402  SCIP* scip, /**< SCIP data structure */
403  SCIP_BENDERS* benders, /**< Benders' decomposition */
404  int priority /**< new priority of the Benders' decomposition */
405  );
406 
407 /** calls the exec method of Benders' decomposition to solve the subproblems
408  *
409  * The checkint flag indicates whether integer feasibility can be assumed. If it is not assumed, i.e. checkint ==
410  * FALSE, then only the convex relaxations of the subproblems are solved. If integer feasibility is assumed, i.e.
411  * checkint == TRUE, then the convex relaxations and the full CIP are solved to generate Benders' cuts and check
412  * solution feasibility.
413  *
414  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
415  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
416  *
417  * @pre This method can be called if SCIP is in one of the following stages:
418  * - \ref SCIP_STAGE_INITPRESOLVE
419  * - \ref SCIP_STAGE_PRESOLVING
420  * - \ref SCIP_STAGE_EXITPRESOLVE
421  * - \ref SCIP_STAGE_PRESOLVED
422  * - \ref SCIP_STAGE_INITSOLVE
423  * - \ref SCIP_STAGE_SOLVING
424  * - \ref SCIP_STAGE_SOLVED
425  */
426 SCIP_EXPORT
428  SCIP* scip, /**< SCIP data structure */
429  SCIP_BENDERS* benders, /**< Benders' decomposition */
430  SCIP_SOL* sol, /**< primal CIP solution, can be NULL */
431  SCIP_RESULT* result, /**< result of the pricing process */
432  SCIP_Bool* infeasible, /**< is the master problem infeasible with respect to the Benders' cuts? */
433  SCIP_Bool* auxviol, /**< set to TRUE only if the solution is feasible but the aux vars are violated */
434  SCIP_BENDERSENFOTYPE type, /**< the type of solution being enforced */
435  SCIP_Bool checkint /**< should the integer solution be checked by the subproblems */
436  );
437 
438 /** returns the master problem variable for the given subproblem variable
439  *
440  * This function is used as part of the cut generation process.
441  *
442  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
443  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
444  *
445  * @pre This method can be called if SCIP is in one of the following stages:
446  * - \ref SCIP_STAGE_INITPRESOLVE
447  * - \ref SCIP_STAGE_PRESOLVING
448  * - \ref SCIP_STAGE_EXITPRESOLVE
449  * - \ref SCIP_STAGE_PRESOLVED
450  * - \ref SCIP_STAGE_INITSOLVE
451  * - \ref SCIP_STAGE_SOLVING
452  * - \ref SCIP_STAGE_SOLVED
453  */
454 SCIP_EXPORT
456  SCIP* scip, /**< SCIP data structure */
457  SCIP_BENDERS* benders, /**< Benders' decomposition */
458  SCIP_VAR* var, /**< the subproblem variable */
459  SCIP_VAR** mappedvar /**< pointer to store the master variable that var is mapped to */
460  );
461 
462 /** returns the subproblem problem variable for the given master variable
463  *
464  * This function is used as part of the cut generation process.
465  *
466  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
467  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
468  *
469  * @pre This method can be called if SCIP is in one of the following stages:
470  * - \ref SCIP_STAGE_INITPRESOLVE
471  * - \ref SCIP_STAGE_PRESOLVING
472  * - \ref SCIP_STAGE_EXITPRESOLVE
473  * - \ref SCIP_STAGE_PRESOLVED
474  * - \ref SCIP_STAGE_INITSOLVE
475  * - \ref SCIP_STAGE_SOLVING
476  * - \ref SCIP_STAGE_SOLVED
477  */
478 SCIP_EXPORT
480  SCIP* scip, /**< SCIP data structure */
481  SCIP_BENDERS* benders, /**< Benders' decomposition */
482  SCIP_VAR* var, /**< the master variable */
483  SCIP_VAR** mappedvar, /**< pointer to store the subproblem variable that var is mapped to */
484  int probnumber /**< the subproblem number */
485  );
486 
487 /** returns the number of subproblems that are stored in the given Benders' decomposition
488  *
489  * @return the number of subproblems in the Benders' decomposition
490  */
491 SCIP_EXPORT
493  SCIP* scip, /**< SCIP data structure */
494  SCIP_BENDERS* benders /**< Benders' decomposition */
495  );
496 
497 /** registers the Benders' decomposition subproblem with the Benders' decomposition struct.
498  *
499  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
500  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
501  *
502  * @pre This method can be called if SCIP is in one of the following stages:
503  * - \ref SCIP_STAGE_INIT
504  * - \ref SCIP_STAGE_PROBLEM
505  */
506 SCIP_EXPORT
508  SCIP* scip, /**< SCIP data structure */
509  SCIP_BENDERS* benders, /**< Benders' decomposition */
510  SCIP* subproblem /**< Benders' decomposition subproblem */
511  );
512 
513 /** calls the generic subproblem setup method for a Benders' decomposition subproblem
514  *
515  * This is called if the user requires to solve the Benders' decomposition subproblem separately from the main Benders'
516  * solving loop. This could be in the case of enhancement techniques.
517  *
518  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
519  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
520  *
521  * @pre This method can be called if SCIP is in one of the following stages:
522  * - \ref SCIP_STAGE_INITPRESOLVE
523  * - \ref SCIP_STAGE_PRESOLVING
524  * - \ref SCIP_STAGE_EXITPRESOLVE
525  * - \ref SCIP_STAGE_PRESOLVED
526  * - \ref SCIP_STAGE_INITSOLVE
527  * - \ref SCIP_STAGE_SOLVING
528  * - \ref SCIP_STAGE_SOLVED
529  */
530 SCIP_EXPORT
532  SCIP* scip, /**< SCIP data structure */
533  SCIP_BENDERS* benders, /**< the Benders' decomposition data structure */
534  SCIP_SOL* sol, /**< primal solution used to setup tht problem, NULL for LP solution */
535  int probnumber, /**< the subproblem number */
536  SCIP_BENDERSENFOTYPE type /**< the enforcement type calling this function */
537  );
538 
539 /** calls the solving method for a single Benders' decomposition subproblem
540  *
541  * The method either calls the users solve subproblem method or calls the generic method. In the case of the generic
542  * method, the user must set up the subproblem prior to calling this method.
543  *
544  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
545  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
546  *
547  * @pre This method can be called if SCIP is in one of the following stages:
548  * - \ref SCIP_STAGE_INITPRESOLVE
549  * - \ref SCIP_STAGE_PRESOLVING
550  * - \ref SCIP_STAGE_EXITPRESOLVE
551  * - \ref SCIP_STAGE_PRESOLVED
552  * - \ref SCIP_STAGE_INITSOLVE
553  * - \ref SCIP_STAGE_SOLVING
554  * - \ref SCIP_STAGE_SOLVED
555  */
556 SCIP_EXPORT
558  SCIP* scip, /**< SCIP data structure */
559  SCIP_BENDERS* benders, /**< Benders' decomposition */
560  SCIP_SOL* sol, /**< primal CIP solution, can be NULL for the current LP/Pseudo solution */
561  int probnumber, /**< the subproblem number */
562  SCIP_Bool* infeasible, /**< returns whether the current subproblem is infeasible */
563  SCIP_Bool solvecip, /**< directly solve the CIP subproblem */
564  SCIP_Real* objective /**< the objective function value of the subproblem, can be NULL */
565  );
566 
567 /** frees the subproblem after calling the solve subproblem method
568  *
569  * This will either call the user defined free
570  * subproblem callback for Benders' decomposition or the default freeing methods. In the default case, if the
571  * subproblem is an LP, then SCIPendProbing is called. If the subproblem is a MIP, then SCIPfreeTransform is called.
572  *
573  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
574  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
575  *
576  * @pre This method can be called if SCIP is in one of the following stages:
577  * - \ref SCIP_STAGE_INITPRESOLVE
578  * - \ref SCIP_STAGE_PRESOLVING
579  * - \ref SCIP_STAGE_EXITPRESOLVE
580  * - \ref SCIP_STAGE_PRESOLVED
581  * - \ref SCIP_STAGE_INITSOLVE
582  * - \ref SCIP_STAGE_SOLVING
583  * - \ref SCIP_STAGE_SOLVED
584  * - \ref SCIP_STAGE_EXITSOLVE
585  * - \ref SCIP_STAGE_FREETRANS
586  */
587 SCIP_EXPORT
589  SCIP* scip, /**< SCIP data structure */
590  SCIP_BENDERS* benders, /**< Benders' decomposition */
591  int probnumber /**< the subproblem number */
592  );
593 
594 /** checks the optimality of a Benders' decomposition subproblem by comparing the objective function value against the
595  * value of the corresponding auxiliary variable
596  *
597  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
598  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
599  *
600  * @pre This method can be called if SCIP is in one of the following stages:
601  * - \ref SCIP_STAGE_PRESOLVING
602  * - \ref SCIP_STAGE_SOLVING
603  * - \ref SCIP_STAGE_SOLVED
604  *
605  * @pre This method can be called if requested subproblem is in one of the following stages:
606  * - \ref SCIP_STAGE_SOLVING
607  * - \ref SCIP_STAGE_SOLVED
608  */
609 SCIP_EXPORT
611  SCIP* scip, /**< SCIP data structure */
612  SCIP_BENDERS* benders, /**< the benders' decomposition structure */
613  SCIP_SOL* sol, /**< primal CIP solution, can be NULL for the current LP solution */
614  int probnumber, /**< the number of the pricing problem */
615  SCIP_Bool* optimal /**< flag to indicate whether the current subproblem is optimal for the master */
616  );
617 
618 /** returns the value of the auxiliary variable for a given subproblem */
619 SCIP_EXPORT
621  SCIP* scip, /**< SCIP data structure */
622  SCIP_BENDERS* benders, /**< the benders' decomposition structure */
623  SCIP_SOL* sol, /**< primal CIP solution, can be NULL for the current LP solution */
624  int probnumber /**< the number of the pricing problem */
625  );
626 
627 /** solves an independent subproblem to identify its lower bound and updates the lower bound of the corresponding
628  * auxiliary variable
629  *
630  * @pre This method can be called if SCIP is in one of the following stages:
631  * - \ref SCIP_STAGE_INITPRESOLVE
632  * - \ref SCIP_STAGE_PRESOLVING
633  * - \ref SCIP_STAGE_EXITPRESOLVE
634  * - \ref SCIP_STAGE_PRESOLVED
635  * - \ref SCIP_STAGE_INITSOLVE
636  * - \ref SCIP_STAGE_SOLVING
637  *
638  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
639  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
640  */
641 SCIP_EXPORT
643  SCIP* scip, /**< the SCIP data structure */
644  SCIP_BENDERS* benders, /**< Benders' decomposition */
645  int probnumber, /**< the subproblem to be evaluated */
646  SCIP_Real* lowerbound, /**< the lowerbound for the subproblem */
647  SCIP_Bool* infeasible /**< was the subproblem found to be infeasible? */
648  );
649 
650 /** merges a subproblem into the master problem.
651  *
652  * This process just adds a copy of the subproblem variables and constraints to the master problem, but keeps the
653  * subproblem stored in the Benders' decomposition data structure. The reason for keeping the subproblem available is
654  * for when it is queried for solutions after the problem is solved.
655  *
656  * Once the subproblem is merged into the master problem, then the subproblem is flagged as disabled. This means that
657  * it will not be solved in the subsequent subproblem solving loops.
658  *
659  * The associated auxiliary variables are kept in the master problem. The objective function of the merged subproblem
660  * is added as an underestimator constraint.
661  *
662  * @pre This method can be called if SCIP is in one of the following stages:
663  * - \ref SCIP_STAGE_INITPRESOLVE
664  * - \ref SCIP_STAGE_PRESOLVING
665  * - \ref SCIP_STAGE_EXITPRESOLVE
666  * - \ref SCIP_STAGE_PRESOLVED
667  * - \ref SCIP_STAGE_INITSOLVE
668  * - \ref SCIP_STAGE_SOLVING
669  *
670  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
671  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
672  */
673 SCIP_EXPORT
675  SCIP* scip, /**< the SCIP data structure */
676  SCIP_BENDERS* benders, /**< Benders' decomposition */
677  SCIP_HASHMAP* varmap, /**< a hashmap to store the mapping of subproblem variables corresponding
678  * to the newly created master variables, or NULL */
679  SCIP_HASHMAP* consmap, /**< a hashmap to store the mapping of subproblem constraints to the
680  corresponding newly created constraints, or NULL */
681  int probnumber /**< the number of the subproblem that will be merged into the master problem*/
682  );
683 
684 /** applies a Benders' decomposition to the selected decomposition from the decomposition store
685  *
686  * @pre This method can be called if SCIP is in one of the following stages:
687  * - \ref SCIP_STAGE_PROBLEM
688  * - \ref SCIP_STAGE_TRANSFORMED
689  * - \ref SCIP_STAGE_INITPRESOLVE
690  * - \ref SCIP_STAGE_PRESOLVING
691  * - \ref SCIP_STAGE_EXITPRESOLVE
692  * - \ref SCIP_STAGE_PRESOLVED
693  * - \ref SCIP_STAGE_INITSOLVE
694  *
695  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
696  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
697  */
698 SCIP_EXPORT
700  SCIP* scip, /**< the SCIP data structure */
701  int decompindex /**< the index of the decomposition that will be applied */
702  );
703 
704 /** @} */
705 
706 /**@addtogroup PublicBenderscutsMethods
707  *
708  * @{
709  */
710 
711 /** creates a Benders' cut algorithms and includes it in the associated Benders' decomposition
712  *
713  * This should be called from the SCIPincludeBendersXyz for the associated Benders' decomposition. It is only possible
714  * to include a Benders' cut algorithm if a Benders' decomposition has already been included
715  * This should be done during the problem creation stage.
716  *
717  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
718  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
719  *
720  * @pre This method can be called if SCIP is in one of the following stages:
721  * - \ref SCIP_STAGE_INIT
722  * - \ref SCIP_STAGE_PROBLEM
723  *
724  * @note method has all Benders' decomposition callbacks as arguments and is thus changed every time a new callback is
725  * added in future releases; consider using SCIPincludeBendersBasic() and setter functions
726  * if you seek for a method which is less likely to change in future releases
727  */
728 SCIP_EXPORT
730  SCIP* scip, /**< SCIP data structure */
731  SCIP_BENDERS* benders, /**< Benders' decomposition */
732  const char* name, /**< name of Benders' decomposition cuts */
733  const char* desc, /**< description of Benders' decomposition cuts */
734  int priority, /**< priority of the Benders' decomposition cuts */
735  SCIP_Bool islpcut, /**< indicates whether the cut is generated from the LP solution */
736  SCIP_DECL_BENDERSCUTCOPY((*benderscutcopy)),/**< copy method of Benders' decomposition cuts or NULL if you don't want to copy your plugin into sub-SCIPs */
737  SCIP_DECL_BENDERSCUTFREE((*benderscutfree)),/**< destructor of Benders' decomposition cuts */
738  SCIP_DECL_BENDERSCUTINIT((*benderscutinit)),/**< initialize Benders' decomposition cuts */
739  SCIP_DECL_BENDERSCUTEXIT((*benderscutexit)),/**< deinitialize Benders' decomposition cuts */
740  SCIP_DECL_BENDERSCUTINITSOL((*benderscutinitsol)),/**< solving process initialization method of Benders' decomposition cuts */
741  SCIP_DECL_BENDERSCUTEXITSOL((*benderscutexitsol)),/**< solving process deinitialization method of Benders' decomposition cuts */
742  SCIP_DECL_BENDERSCUTEXEC((*benderscutexec)),/**< execution method of Benders' decomposition cuts */
743  SCIP_BENDERSCUTDATA* benderscutdata /**< Benders' decomposition cuts data */
744  );
745 
746 /** creates a Benders' cut and includes it an associated Benders' decomposition with all non-fundamental callbacks set to NULL
747  *
748  * If needed, the non-fundamental callbacks can be added afterwards via setter functions SCIPsetBenderscutCopy(),
749  * SCIPsetBenderscutFree(), SCIPsetBenderscutInit(), SCIPsetBenderscutExit(), SCIPsetBenderscutInitsol(),
750  * SCIPsetBenderscutExitsol().
751  *
752  * This should be done during the problem creation stage.
753  *
754  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
755  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
756  *
757  * @pre This method can be called if SCIP is in one of the following stages:
758  * - \ref SCIP_STAGE_INIT
759  * - \ref SCIP_STAGE_PROBLEM
760  *
761  * @note if you want to set all callbacks with a single method call, consider using SCIPincludeBenders() instead
762  */
763 SCIP_EXPORT
765  SCIP* scip, /**< SCIP data structure */
766  SCIP_BENDERS* benders, /**< Benders' decomposition */
767  SCIP_BENDERSCUT** benderscutptr, /**< reference to a Benders' decomposition cut, or NULL */
768  const char* name, /**< name of Benders' decomposition */
769  const char* desc, /**< description of Benders' decomposition */
770  int priority, /**< priority of the Benders' decomposition */
771  SCIP_Bool islpcut, /**< indicates whether the cut is generated from the LP solution */
772  SCIP_DECL_BENDERSCUTEXEC((*benderscutexec)),/**< the execution method of the Benders' cut algorithm */
773  SCIP_BENDERSCUTDATA* benderscutdata /**< Benders' cut data */
774  );
775 
776 /** sets copy method of Benders' decomposition cut
777  *
778  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
779  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
780  *
781  * @pre This method can be called if SCIP is in one of the following stages:
782  * - \ref SCIP_STAGE_INIT
783  * - \ref SCIP_STAGE_PROBLEM
784  */
785 SCIP_EXPORT
787  SCIP* scip, /**< SCIP data structure */
788  SCIP_BENDERSCUT* benderscut, /**< Benders' decomposition cut */
789  SCIP_DECL_BENDERSCUTCOPY((*benderscutcopy))/**< copy method of benderscut or NULL if you don't want to copy your plugin into sub-SCIPs */
790  );
791 
792 /** sets destructor method of benderscut
793  *
794  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
795  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
796  *
797  * @pre This method can be called if SCIP is in one of the following stages:
798  * - \ref SCIP_STAGE_INIT
799  * - \ref SCIP_STAGE_PROBLEM
800  */
801 SCIP_EXPORT
803  SCIP* scip, /**< SCIP data structure */
804  SCIP_BENDERSCUT* benderscut, /**< benderscut */
805  SCIP_DECL_BENDERSCUTFREE((*benderscutfree))/**< destructor of benderscut */
806  );
807 
808 /** sets initialization method of benderscut
809  *
810  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
811  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
812  *
813  * @pre This method can be called if SCIP is in one of the following stages:
814  * - \ref SCIP_STAGE_INIT
815  * - \ref SCIP_STAGE_PROBLEM
816  */
817 SCIP_EXPORT
819  SCIP* scip, /**< SCIP data structure */
820  SCIP_BENDERSCUT* benderscut, /**< benderscut */
821  SCIP_DECL_BENDERSCUTINIT((*benderscutinit))/**< initialize benderscut */
822  );
823 
824 /** sets deinitialization method of benderscut
825  *
826  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
827  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
828  *
829  * @pre This method can be called if SCIP is in one of the following stages:
830  * - \ref SCIP_STAGE_INIT
831  * - \ref SCIP_STAGE_PROBLEM
832  */
833 SCIP_EXPORT
835  SCIP* scip, /**< SCIP data structure */
836  SCIP_BENDERSCUT* benderscut, /**< benderscut */
837  SCIP_DECL_BENDERSCUTEXIT((*benderscutexit))/**< deinitialize benderscut */
838  );
839 
840 /** sets solving process initialization method of benderscut
841  *
842  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
843  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
844  *
845  * @pre This method can be called if SCIP is in one of the following stages:
846  * - \ref SCIP_STAGE_INIT
847  * - \ref SCIP_STAGE_PROBLEM
848  */
849 SCIP_EXPORT
851  SCIP* scip, /**< SCIP data structure */
852  SCIP_BENDERSCUT* benderscut, /**< benderscut */
853  SCIP_DECL_BENDERSCUTINITSOL((*benderscutinitsol))/**< solving process initialization method of benderscut */
854  );
855 
856 /** sets solving process deinitialization method of benderscut
857  *
858  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
859  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
860  *
861  * @pre This method can be called if SCIP is in one of the following stages:
862  * - \ref SCIP_STAGE_INIT
863  * - \ref SCIP_STAGE_PROBLEM
864  */
865 SCIP_EXPORT
867  SCIP* scip, /**< SCIP data structure */
868  SCIP_BENDERSCUT* benderscut, /**< benderscut */
869  SCIP_DECL_BENDERSCUTEXITSOL((*benderscutexitsol))/**< solving process deinitialization method of benderscut */
870  );
871 
872 /** sets the priority of a Benders' decomposition cut algorithm
873  *
874  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
875  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
876  *
877  * @pre This method can be called if SCIP is in one of the following stages:
878  * - \ref SCIP_STAGE_INIT
879  * - \ref SCIP_STAGE_PROBLEM
880  */
881 SCIP_EXPORT
883  SCIP* scip, /**< SCIP data structure */
884  SCIP_BENDERSCUT* benderscut, /**< benderscut */
885  int priority /**< new priority of the Benders' decomposition */
886  );
887 
888 /** adds the generated cuts to the Benders' cut storage
889  *
890  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
891  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
892  *
893  * @pre This method can be called if SCIP is in one of the following stages:
894  * - \ref SCIP_STAGE_INITPRESOLVE
895  * - \ref SCIP_STAGE_PRESOLVING
896  * - \ref SCIP_STAGE_EXITPRESOLVE
897  * - \ref SCIP_STAGE_PRESOLVED
898  * - \ref SCIP_STAGE_INITSOLVE
899  * - \ref SCIP_STAGE_SOLVING
900  */
901 SCIP_EXPORT
903  SCIP* scip, /**< the SCIP data structure */
904  SCIP_BENDERS* benders, /**< Benders' decomposition */
905  SCIP_VAR** vars, /**< the variables that have non-zero coefficients in the cut */
906  SCIP_Real* vals, /**< the coefficients of the variables in the cut */
907  SCIP_Real lhs, /**< the left hand side of the cut */
908  SCIP_Real rhs, /**< the right hand side of the cut */
909  int nvars /**< the number of variables with non-zero coefficients in the cut */
910  );
911 
912 /** applies the Benders' decomposition cuts in storage to the input SCIP instance
913  *
914  * When calling the function, the user must be sure that the variables are associated with the input SCIP instance.
915  * The main use of this method is to transfer Benders' cuts between solvers in ParaSCIP.
916  *
917  * @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
918  * SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
919  *
920  * @pre This method can be called if SCIP is in one of the following stages:
921  * - \ref SCIP_STAGE_INITPRESOLVE
922  * - \ref SCIP_STAGE_PRESOLVING
923  * - \ref SCIP_STAGE_EXITPRESOLVE
924  * - \ref SCIP_STAGE_PRESOLVED
925  * - \ref SCIP_STAGE_INITSOLVE
926  * - \ref SCIP_STAGE_SOLVING
927  */
929  SCIP* scip, /**< the SCIP data structure */
930  SCIP_BENDERS* benders /**< Benders' decomposition */
931  );
932 
933 /** @} */
934 
935 #ifdef __cplusplus
936 }
937 #endif
938 
939 #endif
enum SCIP_Result SCIP_RESULT
Definition: type_result.h:61
SCIP_RETCODE SCIPsetBendersPresubsolve(SCIP *scip, SCIP_BENDERS *benders, SCIP_DECL_BENDERSPRESUBSOLVE((*benderspresubsolve)))
Definition: scip_benders.c:389
SCIP_RETCODE SCIPsetBendersSolveAndFreesub(SCIP *scip, SCIP_BENDERS *benders, SCIP_DECL_BENDERSSOLVESUBCONVEX((*benderssolvesubconvex)), SCIP_DECL_BENDERSSOLVESUB((*benderssolvesub)), SCIP_DECL_BENDERSFREESUB((*bendersfreesub)))
Definition: scip_benders.c:413
#define SCIP_DECL_BENDERSCREATESUB(x)
Definition: type_benders.h:194
SCIP_RETCODE SCIPincludeBenderscutBasic(SCIP *scip, SCIP_BENDERS *benders, SCIP_BENDERSCUT **benderscutptr, const char *name, const char *desc, int priority, SCIP_Bool islpcut, SCIP_DECL_BENDERSCUTEXEC((*benderscutexec)), SCIP_BENDERSCUTDATA *benderscutdata)
SCIP_RETCODE SCIPmergeBendersSubproblemIntoMaster(SCIP *scip, SCIP_BENDERS *benders, SCIP_HASHMAP *varmap, SCIP_HASHMAP *consmap, int probnumber)
Definition: scip_benders.c:999
SCIP_RETCODE SCIPfreeBendersSubproblem(SCIP *scip, SCIP_BENDERS *benders, int probnumber)
Definition: scip_benders.c:861
void SCIPsetBendersPriority(SCIP *scip, SCIP_BENDERS *benders, int priority)
Definition: scip_benders.c:590
type definitions for miscellaneous datastructures
struct SCIP_BenderscutData SCIP_BENDERSCUTDATA
#define SCIP_DECL_BENDERSINITSOL(x)
Definition: type_benders.h:151
#define SCIP_DECL_BENDERSFREE(x)
Definition: type_benders.h:103
SCIP_RETCODE SCIPgetBendersMasterVar(SCIP *scip, SCIP_BENDERS *benders, SCIP_VAR *var, SCIP_VAR **mappedvar)
Definition: scip_benders.c:660
#define SCIP_DECL_BENDERSINITPRE(x)
Definition: type_benders.h:132
#define SCIP_DECL_BENDERSCUTFREE(x)
SCIP_RETCODE SCIPsetBendersSubproblemComp(SCIP *scip, SCIP_BENDERS *benders, SCIP_DECL_SORTPTRCOMP((*benderssubcomp)))
Definition: scip_benders.c:477
SCIP_RETCODE SCIPsetBendersExitsol(SCIP *scip, SCIP_BENDERS *benders, SCIP_DECL_BENDERSEXITSOL((*bendersexitsol)))
Definition: scip_benders.c:365
#define SCIP_DECL_BENDERSGETVAR(x)
Definition: type_benders.h:366
SCIP_RETCODE SCIPsetBendersInit(SCIP *scip, SCIP_BENDERS *benders, SCIP_DECL_BENDERSINIT((*bendersinit)))
Definition: scip_benders.c:245
enum SCIP_Retcode SCIP_RETCODE
Definition: type_retcode.h:63
enum SCIP_BendersEnfoType SCIP_BENDERSENFOTYPE
Definition: type_benders.h:51
SCIP_RETCODE SCIPincludeBenderscut(SCIP *scip, SCIP_BENDERS *benders, const char *name, const char *desc, int priority, SCIP_Bool islpcut, SCIP_DECL_BENDERSCUTCOPY((*benderscutcopy)), SCIP_DECL_BENDERSCUTFREE((*benderscutfree)), SCIP_DECL_BENDERSCUTINIT((*benderscutinit)), SCIP_DECL_BENDERSCUTEXIT((*benderscutexit)), SCIP_DECL_BENDERSCUTINITSOL((*benderscutinitsol)), SCIP_DECL_BENDERSCUTEXITSOL((*benderscutexitsol)), SCIP_DECL_BENDERSCUTEXEC((*benderscutexec)), SCIP_BENDERSCUTDATA *benderscutdata)
SCIP_Real SCIPgetBendersAuxiliaryVarVal(SCIP *scip, SCIP_BENDERS *benders, SCIP_SOL *sol, int probnumber)
Definition: scip_benders.c:931
#define SCIP_DECL_BENDERSINIT(x)
Definition: type_benders.h:112
type definitions for return codes for SCIP methods
#define SCIP_DECL_BENDERSCUTEXEC(x)
#define SCIP_DECL_BENDERSCUTCOPY(x)
SCIP_RETCODE SCIPgetBendersSubproblemVar(SCIP *scip, SCIP_BENDERS *benders, SCIP_VAR *var, SCIP_VAR **mappedvar, int probnumber)
Definition: scip_benders.c:696
#define SCIP_DECL_BENDERSCUTINIT(x)
int SCIPgetNActiveBenders(SCIP *scip)
Definition: scip_benders.c:532
type definitions for LP management
SCIP_RETCODE SCIPsetBendersExit(SCIP *scip, SCIP_BENDERS *benders, SCIP_DECL_BENDERSEXIT((*bendersexit)))
Definition: scip_benders.c:269
SCIP_RETCODE SCIPcomputeBendersSubproblemLowerbound(SCIP *scip, SCIP_BENDERS *benders, int probnumber, SCIP_Real *lowerbound, SCIP_Bool *infeasible)
Definition: scip_benders.c:959
#define SCIP_DECL_BENDERSFREESUB(x)
Definition: type_benders.h:350
SCIP_RETCODE SCIPincludeBenders(SCIP *scip, const char *name, const char *desc, int priority, SCIP_Bool cutlp, SCIP_Bool cutpseudo, SCIP_Bool cutrelax, SCIP_Bool shareauxvars, SCIP_DECL_BENDERSCOPY((*benderscopy)), SCIP_DECL_BENDERSFREE((*bendersfree)), SCIP_DECL_BENDERSINIT((*bendersinit)), SCIP_DECL_BENDERSEXIT((*bendersexit)), SCIP_DECL_BENDERSINITPRE((*bendersinitpre)), SCIP_DECL_BENDERSEXITPRE((*bendersexitpre)), SCIP_DECL_BENDERSINITSOL((*bendersinitsol)), SCIP_DECL_BENDERSEXITSOL((*bendersexitsol)), SCIP_DECL_BENDERSGETVAR((*bendersgetvar)), SCIP_DECL_BENDERSCREATESUB((*benderscreatesub)), SCIP_DECL_BENDERSPRESUBSOLVE((*benderspresubsolve)), SCIP_DECL_BENDERSSOLVESUBCONVEX((*benderssolvesubconvex)), SCIP_DECL_BENDERSSOLVESUB((*benderssolvesub)), SCIP_DECL_BENDERSPOSTSOLVE((*benderspostsolve)), SCIP_DECL_BENDERSFREESUB((*bendersfreesub)), SCIP_BENDERSDATA *bendersdata)
Definition: scip_benders.c:76
#define SCIP_DECL_BENDERSEXIT(x)
Definition: type_benders.h:121
SCIP_RETCODE SCIPsetupBendersSubproblem(SCIP *scip, SCIP_BENDERS *benders, SCIP_SOL *sol, int probnumber, SCIP_BENDERSENFOTYPE type)
Definition: scip_benders.c:780
#define SCIP_DECL_BENDERSSOLVESUB(x)
Definition: type_benders.h:292
type definitions for SCIP&#39;s main datastructure
SCIP_RETCODE SCIPincludeBendersBasic(SCIP *scip, SCIP_BENDERS **bendersptr, const char *name, const char *desc, int priority, SCIP_Bool cutlp, SCIP_Bool cutpseudo, SCIP_Bool cutrelax, SCIP_Bool shareauxvars, SCIP_DECL_BENDERSGETVAR((*bendersgetvar)), SCIP_DECL_BENDERSCREATESUB((*benderscreatesub)), SCIP_BENDERSDATA *bendersdata)
Definition: scip_benders.c:151
#define SCIP_DECL_BENDERSCUTEXIT(x)
struct SCIP_BendersData SCIP_BENDERSDATA
Definition: type_benders.h:82
SCIP_RETCODE SCIPsetBenderscutExit(SCIP *scip, SCIP_BENDERSCUT *benderscut, SCIP_DECL_BENDERSCUTEXIT((*benderscutexit)))
#define SCIP_DECL_BENDERSSOLVESUBCONVEX(x)
Definition: type_benders.h:259
type definitions for problem variables
SCIP_RETCODE SCIPsetBenderscutPriority(SCIP *scip, SCIP_BENDERSCUT *benderscut, int priority)
SCIP_RETCODE SCIPstoreBendersCut(SCIP *scip, SCIP_BENDERS *benders, SCIP_VAR **vars, SCIP_Real *vals, SCIP_Real lhs, SCIP_Real rhs, int nvars)
#define SCIP_DECL_BENDERSCOPY(x)
Definition: type_benders.h:95
SCIP_BENDERS * SCIPfindBenders(SCIP *scip, const char *name)
Definition: scip_benders.c:493
#define SCIP_Bool
Definition: def.h:93
SCIP_BENDERS ** SCIPgetBenders(SCIP *scip)
Definition: scip_benders.c:508
SCIP_RETCODE SCIPapplyBendersStoredCuts(SCIP *scip, SCIP_BENDERS *benders)
SCIP_RETCODE SCIPapplyBendersDecomposition(SCIP *scip, int decompindex)
SCIP_RETCODE SCIPsetBendersCopy(SCIP *scip, SCIP_BENDERS *benders, SCIP_DECL_BENDERSCOPY((*benderscopy)))
Definition: scip_benders.c:197
SCIP_RETCODE SCIPdeactivateBenders(SCIP *scip, SCIP_BENDERS *benders)
Definition: scip_benders.c:577
SCIP_RETCODE SCIPaddBendersSubproblem(SCIP *scip, SCIP_BENDERS *benders, SCIP *subproblem)
Definition: scip_benders.c:746
type definitions for Benders&#39; decomposition methods
SCIP_RETCODE SCIPcheckBendersSubproblemOptimality(SCIP *scip, SCIP_BENDERS *benders, SCIP_SOL *sol, int probnumber, SCIP_Bool *optimal)
Definition: scip_benders.c:892
int SCIPgetNBenders(SCIP *scip)
Definition: scip_benders.c:521
type definitions for storing primal CIP solutions
type definitions for Benders&#39; decomposition cut
SCIP_RETCODE SCIPsetBendersPostsolve(SCIP *scip, SCIP_BENDERS *benders, SCIP_DECL_BENDERSPOSTSOLVE((*benderspostsolve)))
Definition: scip_benders.c:453
SCIP_RETCODE SCIPsetBenderscutInit(SCIP *scip, SCIP_BENDERSCUT *benderscut, SCIP_DECL_BENDERSCUTINIT((*benderscutinit)))
SCIP_RETCODE SCIPsetBendersInitsol(SCIP *scip, SCIP_BENDERS *benders, SCIP_DECL_BENDERSINITSOL((*bendersinitsol)))
Definition: scip_benders.c:341
SCIP_RETCODE SCIPsetBenderscutInitsol(SCIP *scip, SCIP_BENDERSCUT *benderscut, SCIP_DECL_BENDERSCUTINITSOL((*benderscutinitsol)))
SCIP_RETCODE SCIPsetBenderscutCopy(SCIP *scip, SCIP_BENDERSCUT *benderscut, SCIP_DECL_BENDERSCUTCOPY((*benderscutcopy)))
#define SCIP_DECL_SORTPTRCOMP(x)
Definition: type_misc.h:188
#define SCIP_DECL_BENDERSEXITSOL(x)
Definition: type_benders.h:162
SCIP_RETCODE SCIPsetBenderscutExitsol(SCIP *scip, SCIP_BENDERSCUT *benderscut, SCIP_DECL_BENDERSCUTEXITSOL((*benderscutexitsol)))
SCIP_RETCODE SCIPsetBendersFree(SCIP *scip, SCIP_BENDERS *benders, SCIP_DECL_BENDERSFREE((*bendersfree)))
Definition: scip_benders.c:221
#define SCIP_Real
Definition: def.h:186
result codes for SCIP callback methods
SCIP_RETCODE SCIPsolveBendersSubproblem(SCIP *scip, SCIP_BENDERS *benders, SCIP_SOL *sol, int probnumber, SCIP_Bool *infeasible, SCIP_Bool solvecip, SCIP_Real *objective)
Definition: scip_benders.c:818
#define SCIP_DECL_BENDERSCUTEXITSOL(x)
SCIP_RETCODE SCIPsetBenderscutFree(SCIP *scip, SCIP_BENDERSCUT *benderscut, SCIP_DECL_BENDERSCUTFREE((*benderscutfree)))
int SCIPgetBendersNSubproblems(SCIP *scip, SCIP_BENDERS *benders)
Definition: scip_benders.c:722
#define SCIP_DECL_BENDERSPOSTSOLVE(x)
Definition: type_benders.h:328
#define SCIP_DECL_BENDERSEXITPRE(x)
Definition: type_benders.h:140
common defines and data types used in all packages of SCIP
SCIP_RETCODE SCIPactivateBenders(SCIP *scip, SCIP_BENDERS *benders, int nsubproblems)
Definition: scip_benders.c:555
SCIP_RETCODE SCIPsetBendersExitpre(SCIP *scip, SCIP_BENDERS *benders, SCIP_DECL_BENDERSEXITPRE((*bendersexitpre)))
Definition: scip_benders.c:317
SCIP_RETCODE SCIPsolveBendersSubproblems(SCIP *scip, SCIP_BENDERS *benders, SCIP_SOL *sol, SCIP_RESULT *result, SCIP_Bool *infeasible, SCIP_Bool *auxviol, SCIP_BENDERSENFOTYPE type, SCIP_Bool checkint)
Definition: scip_benders.c:622
SCIP_RETCODE SCIPsetBendersInitpre(SCIP *scip, SCIP_BENDERS *benders, SCIP_DECL_BENDERSINITPRE((*bendersinitpre)))
Definition: scip_benders.c:293
#define SCIP_DECL_BENDERSCUTINITSOL(x)
type definitions for constraints and constraint handlers
#define SCIP_DECL_BENDERSPRESUBSOLVE(x)
Definition: type_benders.h:218