[Cbc-tickets] [COIN-OR Branch-and-Cut MIP Solver] #161: Wrong optimum with files from MIPLIB2010

[COIN-OR Branch-and-Cut MIP Solver]

#161: Wrong optimum with files from MIPLIB2010
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Reporter:  charlesBrixko       |       Owner:  tkr
    Type:  defect              |      Status:  assigned
Priority:  major               |   Component:  Cbc
 Version:  2.7                 |  Resolution:
Keywords:  optimum MIPLIB2010  |
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Comment (by charlesBrixko):

 The following results are for the stable/2.9 branch in svn before the
 release 2.9.3, with all or without any of the Third Party software, with 4
 or 8 threads :[[BR]]
 - lectsched-2.mps is found correctly with great difference in time to find
 the solution (depending on the test, from 716 to 664862 Enumerated
 nodes).[[BR]]
 - the others lectsched-x.mps should be found too, it takes too long to be
 checked for this post.[[BR]]
 - mik-250-1-100-1.mps and ofi.mps still give wrong results the same
 way.[[BR]]
 - for ofi.mps, we always see in the output "Feasibility pump exiting with
 objective of 1.27683e+10".[[BR]]

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Ticket URL: <https://projects.coin-or.org/Cbc/ticket/161#comment:4>
COIN-OR Branch-and-Cut MIP Solver <http://projects.coin-or.org/Cbc>
An LP-based branch-and-cut MIP solver.