[Cbc] cbc failure on small IP

Thu Sep 24 14:18:54 EDT 2009

Matt,

Will look at it - may have been fixed in trunk.

John

  From:       Matthew Galati <Matthew.Galati at sas.com>                                                                

  To:         "cbc at list.coin-or.org" <cbc at list.coin-or.org>                                                          

  Date:       09/24/2009 11:32 AM                                                                                    

  Subject:    [Cbc] cbc failure on small IP                                                                          

  Sent by:    cbc-bounces at list.coin-or.org                                                                           

https://projects.coin-or.org/Cbc/ticket/81
http://coral.ie.lehigh.edu/~magh/tmp/PRICE_AND_CUT_subProb_relax.n296.c0.p8.b0.lp

Coin Cbc and Clp Solver version 2.3stable, build Sep 23 2009
command line - ./bin/cbc
Decomp/examples/MILP/PRICE_AND_CUT_subProb_relax.n296.c0.p8.b0.lp (default
strategy 1)
Continuous objective value is -8339.48 - 0.00 seconds
Cgl0003I 0 fixed, 0 tightened bounds, 3 strengthened rows, 0 substitutions
Cgl0003I 0 fixed, 0 tightened bounds, 3 strengthened rows, 0 substitutions
Cgl0003I 0 fixed, 0 tightened bounds, 2 strengthened rows, 0 substitutions
Cgl0003I 0 fixed, 0 tightened bounds, 1 strengthened rows, 0 substitutions
Cgl0004I processed model has 6 rows, 17 columns (17 integer) and 26
elements
Cbc0038I Pass   1: suminf.    0.39750 (2) obj. -7448.18 iterations 3
Cbc0038I Solution found of -7073.18
Cbc0038I Branch and bound needed to clear up 1 general integers

....

cbc: ../../../Clp/src/ClpSimplexDual.cpp:1411: int
ClpSimplexDual::whileIterating(double*&, int): Assertion `fabs
(dualOut_)<1.0e50' failed.
Aborted_______________________________________________
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