-------- Forwarded Message -------- From: Anton Voropaev <[email protected]> To: bug-glpk <[email protected]> Subject: Some unsuccessful runs (Windows, 4.55, 4.56, 4.59, 4.59.2) Date: Sat, 26 Mar 2016 08:45:14 +0300
There are ten inputs originally collected for GLPK 4.55. Three of them do not confuse GLPK since 4.56, at least for one hour horizon. Another two invariably force the solver to fail. >From 4.55, 4.56 to 4.59, 4.59.2, the set of errors has changed. Now it includes, besides locking in dual simplex, Assertion failed: tcol[csa->p] != 0.0 Error detected in file ..\src\simplex\spydual.c at line ... and glp_intopt: cannot solve current LP relaxation. Details may be found in fails3.zip.
Composed by Anton Voropaev ([email protected]). This is a repeat of runs reported for GLPK 4.55 on 09.01.2015 and GLPK 4.56 on 11.10.2015 (http://lists.gnu.org/archive/html/bug-glpk/2015-01/msg00002.html http://lists.gnu.org/archive/html/bug-glpk/2015-10/msg00007.html) using newer versions 4.59 and 4.59.2 of GLPK. This time, I have built the stand-alone solver via Microsoft Windows SDK v7.1 on 32-bit Windows XP. Below is a summary of results. A mark consists of fail's abbreviation and approximate occurrence time in minutes. Blank means that no fails occured, at least for an hour. instance + options | 4.55 | 4.56 | 4.59 | 4.59.2 | 4.59.2 flip ---------------------------------------------------------------------------- corr1_mostf_bestb | ptr 1 | | | | corr1_mostf_bestb_cuts | ptr 1 | | lock 1 | lock 4 | corr1_mostf_bfs | ptr 1 | piv1 1 | lock' 3 | | corr1_mostf_bfs_cuts | ptr 1 | lock 2 | tcol 1 | lock 10 | lock 10 corr2_pcost_bestp | piv1 25 | piv1 6 | lock' 1 | | corr3_bestp | piv1 7 | | | | corr3_pcost_bestp | piv1 25 | piv1 15 | tcol 25 | tcol' 25 | tcol' 20 corr3_pcost_dfs | piv1 15 | piv1 15 | tcol 20 | | tcol' 30 water_cuts | piv1 1 | | cannot 1 | | lock'' 10 coal_last_bestp_cuts | lock 1 | | | | Fails' details. ptr Assertion failed: ptr < end Error detected in file ..\src\bflib\sgf.c at line 146 piv1 Assertion failed: piv1 != 0.0 Error detected in file ..\src\glpspx02.c at line 3027 lock Warning: numerical instability (dual simplex, phase II) Followed by the solution information with no progress over millions of iterations. lock' Error: basis matrix is singular to working precision (cond = ...) Followed by the solution information with no progress over millions of iterations. lock'' Warning: numerical instability (dual simplex, phase II) Followed by the solution information with tiny progress. tcol Assertion failed: tcol[csa->p] != 0.0 Error detected in file ..\src\simplex\spydual.c at line 999 tcol' Assertion failed: tcol[csa->p] != 0.0 Error detected in file ..\src\simplex\spydual.c at line 1103 cannot glp_intopt: cannot solve current LP relaxation
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