[Cbc-tickets] [COIN-OR Branch-and-Cut MIP Solver] #186: Feasible problem reported as infeasible

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

#186: Feasible problem reported as infeasible
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Reporter:  dindy   |      Owner:  tkr
    Type:  defect  |     Status:  new
Priority:  major   |  Component:  Cbc
 Version:  2.9.8   |   Keywords:
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 Hello,

 the attached problem is reported as infeasible by CBC 2.9.9, even though
 it is feasible. Command line used is simply:

 cbc -import inf.lp -solve -quit

 If I set the ratiogap to an high value, say 0.5, a (suboptimal) feasible
 solution is found.

 CBC has been compiled with mingw32 but I tested also with the supplied
 MSVC precompiled binaries to be sure it isn't just some compilation issue.

 Hope it helps, and thanks for this excellent software.

 Bye,

 Denis Sbragion

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Ticket URL: <https://projects.coin-or.org/Cbc/ticket/186>
COIN-OR Branch-and-Cut MIP Solver <http://projects.coin-or.org/Cbc>
An LP-based branch-and-cut MIP solver.