[SCIP] TR: scip crash

[nicolas.derhy at engie.com]

Hi everyone,

I am using scip-3.2.1.win.x86.msvc.opt.spx.mt.exe for solving some MIP instances on Win 7 computer.
First, everything worked perfectly but I recently met unexpected errors from the solver.
Attached to this message, a mps file where Scip stops suddenly.
I obtain this kind of log :
presolving:
(round 1, fast)       338 del vars, 1535 del conss, 0 add conss, 840 chg bounds, 289 chg sides, 684 chg coeffs, 0 upgd conss, 234 impls, 23 clqs
(round 2, fast)       1016 del vars, 1665 del conss, 0 add conss, 852 chg bounds, 298 chg sides, 816 chg coeffs, 0 upgd conss, 234 impls, 23 clqs
(round 3, fast)       1062 del vars, 1719 del conss, 0 add conss, 860 chg bounds, 302 chg sides, 824 chg coeffs, 0 upgd conss, 234 impls, 17 clqs
(round 4, fast)       1075 del vars, 1733 del conss, 0 add conss, 869 chg bounds, 302 chg sides, 829 chg coeffs, 0 upgd conss, 234 impls, 16 clqs
(round 5, fast)       1075 del vars, 1734 del conss, 0 add conss, 869 chg bounds, 303 chg sides, 832 chg coeffs, 0 upgd conss, 234 impls, 16 clqs
(round 6, fast)       1076 del vars, 1735 del conss, 0 add conss, 869 chg bounds, 303 chg sides, 832 chg coeffs, 0 upgd conss, 234 impls, 16 clqs
(round 7, fast)       1076 del vars, 1735 del conss, 0 add conss, 884 chg bounds, 303 chg sides, 832 chg coeffs, 0 upgd conss, 234 impls, 16 clqs
(round 8, fast)       1080 del vars, 1796 del conss, 0 add conss, 884 chg bounds, 310 chg sides, 885 chg coeffs, 0 upgd conss, 234 impls, 16 clqs
(round 9, fast)       1093 del vars, 1809 del conss, 0 add conss, 884 chg bounds, 310 chg sides, 885 chg coeffs, 0 upgd conss, 238 impls, 12 clqs
(round 10, exhaustive) 1093 del vars, 1824 del conss, 0 add conss, 884 chg bounds, 310 chg sides, 885 chg coeffs, 0 upgd conss, 238 impls, 12 clqs
(round 11, fast)       1105 del vars, 1827 del conss, 0 add conss, 884 chg bounds, 310 chg sides, 887 chg coeffs, 0 upgd conss, 238 impls, 12 clqs
(round 12, fast)       1113 del vars, 1834 del conss, 0 add conss, 884 chg bounds, 316 chg sides, 888 chg coeffs, 0 upgd conss, 238 impls, 10 clqs
(round 13, fast)       1125 del vars, 1840 del conss, 0 add conss, 884 chg bounds, 318 chg sides, 888 chg coeffs, 0 upgd conss, 238 impls, 9 clqs
(round 14, fast)       1126 del vars, 1841 del conss, 0 add conss, 884 chg bounds, 318 chg sides, 888 chg coeffs, 0 upgd conss, 238 impls, 9 clqs
(round 15, exhaustive) 1126 del vars, 1841 del conss, 0 add conss, 885 chg bounds, 319 chg sides, 889 chg coeffs, 0 upgd conss, 238 impls, 9 clqs
(round 16, exhaustive) 1126 del vars, 1841 del conss, 0 add conss, 885 chg bounds, 319 chg sides, 889 chg coeffs, 121 upgd conss, 238 impls, 9 clqs
(round 17, medium)     1126 del vars, 1841 del conss, 0 add conss, 889 chg bounds, 319 chg sides, 889 chg coeffs, 121 upgd conss, 294 impls, 9 clqs
(round 18, fast)       1132 del vars, 1847 del conss, 0 add conss, 891 chg bounds, 322 chg sides, 892 chg coeffs, 121 upgd conss, 294 impls, 9 clqs
(round 19, fast)       1135 del vars, 1854 del conss, 0 add conss, 891 chg bounds, 322 chg sides, 892 chg coeffs, 121 upgd conss, 294 impls, 9 clqs
(round 20, exhaustive) 1135 del vars, 1854 del conss, 0 add conss, 891 chg bounds, 322 chg sides, 892 chg coeffs, 142 upgd conss, 294 impls, 9 clqs
   (0.1s) probing cycle finished: starting next cycle
(round 21, exhaustive) 1144 del vars, 1854 del conss, 0 add conss, 909 chg bounds, 322 chg sides, 892 chg coeffs, 142 upgd conss, 430 impls, 21 clqs
(round 22, fast)       1148 del vars, 1866 del conss, 0 add conss, 913 chg bounds, 327 chg sides, 917 chg coeffs, 142 upgd conss, 430 impls, 21 clqs
(round 23, exhaustive) 1148 del vars, 1870 del conss, 0 add conss, 913 chg bounds, 329 chg sides, 917 chg coeffs, 142 upgd conss, 430 impls, 21 clqs
   (0.1s) probing cycle finished: starting next cycle
(round 24, exhaustive) 1178 del vars, 1897 del conss, 0 add conss, 913 chg bounds, 329 chg sides, 917 chg coeffs, 142 upgd conss, 457 impls, 23 clqs
   (0.1s) probing: 43/109 (39.4%) - 9 fixings, 0 aggregations, 173 implications, 18 bound changes
   (0.1s) probing aborted: 50/50 successive totally useless probings
presolving (25 rounds: 25 fast, 9 medium, 8 exhaustive):
1178 deleted vars, 1897 deleted constraints, 0 added constraints, 913 tightened bounds, 0 added holes, 329 changed sides, 917 changed coefficients
457 implications, 23 cliques
presolved problem has 284 variables (99 bin, 0 int, 0 impl, 185 cont) and 307 constraints
    108 constraints of type <varbound>
    199 constraints of type <linear>
Presolving Time: 0.08

(node 1) unresolved numerical troubles in LP 1 -- using pseudo solution instead (loop 1)
time | node  | left  |LP iter|LP it/n| mem |mdpt |frac |vars |cons |cols |rows |cuts |confs|strbr|  dualbound   | primalbound  |  gap
  0.1s|     1 |     2 |    84 |     - |4112k|   0 |   - | 284 | 309 | 284 | 307 |   0 |   2 |   0 |      --      |      --      |    Inf
(node 73) forcing the solution of an LP (last LP 99)...

I do not know what to do to avoid this crash.
If someone has any idea (modifying some parameters ?), it would be great !

Best regards,

Nicolas
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