[Bonmin-tickets] [Bonmin] #51: Incorrect mipStatus for infeasible continuous problem

[Bonmin]

#51: Incorrect mipStatus for infeasible continuous problem
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Reporter:  jonnyz007  |       Owner:  pbonami
    Type:  defect     |      Status:  closed
Priority:  trivial    |   Component:  Bonmin
 Version:  1.5        |  Resolution:  fixed
Keywords:             |
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Comment (by stefan):

 Hi,

 the problem (min -x with 0 <= x <= Inf) is not infeasible, but unbounded.

 When I run Bonmin on this (via the GAMS interface), it ends with
 {{{
 EXIT: Iterates diverging; problem might be unbounded.
 NLP0014I             2   UNBOUNDED -2.020204e+28        6 0.002
 Cbc3007W No integer variables - nothing to do
 Cbc0034I The LP relaxation is unbounded!
 }}}
 and also Bonmin reports the problem to be unbounded (status
 TMINLP::CONTINUOUS_UNBOUNDED in TMINLP::finalize_solution).

 Stefan

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Ticket URL: <https://projects.coin-or.org/ticket/51#comment:5>
Bonmin <http://projects.coin-or.org/Bonmin>
Basic Open-source Nonlinear Mixed INteger programming