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[Bug-glpk] [Fwd: GLPK bugs report]


From: Andrew Makhorin
Subject: [Bug-glpk] [Fwd: GLPK bugs report]
Date: Thu, 11 Jul 2013 12:18:27 +0400

-------- Forwarded Message --------
From: Charles Brixko <address@hidden>
To: address@hidden
Subject: GLPK bugs report
Date: Thu, 11 Jul 2013 04:34:09 +0200

Hello,
 
I tested the MIPLIB 2010 benchmark files on GLPK 4.51 (with gmp-5.1.2)
compiled with gcc 4.8.1 on Fedora 18 64 bits.
 
The conclusions are :
 
The tests files come from MIPLIB 2010 from http://miplib.zib.de/
--benchmark instances--
The acc-tight5.mps result with 4.49 comes from
http://plato.asu.edu/ftp/milpc_res1/benchmark.glpk.res,
see also http://plato.asu.edu/ --Benchmarks for Optimization Software--
 
triptim1 without GLPK option wrongly declared 
PROBLEM HAS NO FEASIBLE SOLUTION
 
acc-tight5 still working after 7200 sec., was resolved fast with 4.49
 
neos13 (as a lot of others) with "--proxy --tmlim 3600" generated
Error: 1986 memory block(s) were lost
Error detected in file glpapi21.c at line 1350
 
glass4 with "--proxy --tmlim 3600" generated
Assertion failed: piv1 != 0.0
Error detected in file glpspx02.c at line 3000
 
mine-166-5 (as mine-90-10 and satellite1-25) with "--cuts" generated 
Assertion failed: x >= -0.001
Error detected in file glpios06.c at line 968
Abandon (core dumped)
 
pw-myciel with "--cuts" generated
PROBLEM HAS NO INTEGER FEASIBLE SOLUTION
although it is resolved fast by CPLEX
(http://plato.asu.edu/ftp/milpc_res12/benchmark.cplex.res) and others
 
 
I hope this will help you improve GLPK and can send you, on request, any
information or files from my test session.
 
Best regards,
 
Charles Brixko
address@hidden
 





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