[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:  new
Priority:  major          |  Component:  Cbc
 Version:                 |   Keywords:  optimum MIPLIB2010
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 I use cbc (2.9.2) compiled with internal BLAS and internal LAPACK and with
 the parallel option enabled.[[BR]]

 With files from MIPLIB2010 and using 4 or 8 threads, I get the following
 wrong results :[[BR]]
 - lectsched-1.mps, lectsched-2.mps, lectsched-3.mps and
 lectsched-4-obj.mps gives each "infeasible".
 - mik-250-1-100-1.mps gives the right optimum 50% of the time, giving a
 wrong optimum the other times.
 - ofi gives the wrong optimum "12768339254.94019508".

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