Composed by Anton Voropaev (address@hidden).


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