[Cbc] Segfault dealing with infeasible lp

[Haroldo Gambini Santos]

Oops, my bad, recompiled and the crash did not happened.

Everything is fine in rev 2322.



Em 10/01/2017 07:35, John Forrest escreveu:
> Haroldo,
>
> Unable to reproduce error.  When I get to line 550, nonLinearCost_ has 
> just been used successfully so if now NULL there must be something 
> seriously wrong.
>
> What configure options and compiler?
>
> John
> On 09/01/17 20:34, Haroldo Gambini Santos wrote:
>>
>> Hi Forrest,
>>
>> It seems that it still crashes in revision 2322:
>>
>>
>> Welcome to the CBC MILP Solver
>> Version: 2.9
>> Build Date: Jan  9 2017
>> Revision Number: 2322
>>
>> command line - cbc infeasible.lp (default strategy 1)
>> cbc: ClpSimplex.cpp:550: int ClpSimplex::gutsOfSolution(double*, 
>> const double*, bool): Assertion `nonLinearCost_' failed.
>> Abortado (imagem do núcleo gravada)
>>
>>
>>
>>
>> Em 09/01/2017 16:21, John Forrest escreveu:
>>> Had already made a change in local copy of trunk (for a different 
>>> reason) which fixes error.
>>>
>>> Hopefully fixed in stable and trunk
>>>
>>> John Forrest
>>> On 09/01/17 16:25, Luís Borges de Oliveira wrote:
>>>> Hello,
>>>>
>>>> We've come across an infeasible lp that causes CBC to segfault:
>>>>
>>>>     Welcome to the CBC MILP Solver
>>>>     Version: 2.9
>>>>     Build Date: Jan  5 2017
>>>>     Revision Number: 2315
>>>>
>>>>     command line - Z:\siscog\sc-cbc\coin-or-cbc\build\bin\cbc.exe
>>>>     infeasible.lp (default strategy 1)
>>>>
>>>>     Program received signal SIGSEGV, Segmentation fault.
>>>>     0x0000000000737f80 in
>>>>     ClpNonLinearCost::checkInfeasibilities(double) ()
>>>>
>>>> An attempt to minimise the lp size made the problem go away, so 
>>>> here is the full lp: 
>>>> https://drive.google.com/open?id=0B4aZo5-t5mnHQUlFWU1BRHRMRDA (4.5 MB).
>>>>
>>>> In case it helps, the infeasibility stems from following 
>>>> constraints and binary variables:
>>>>
>>>>     cnd(R51,16): + a(R51,16,D141) + a(R51,17,D1093) +
>>>>     a(R51,19,D513) <= 2
>>>>     s_a(R51,16): + a(R51,16,D141) = 1
>>>>     s_a(R51,17): + a(R51,17,D1093) = 1
>>>>     s_a(R51,19): + a(R51,19,D513) = 1
>>>>
>>>>
>>>> Cheers,
>>>> Luís
>>>>
>>>>
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>>>
>>>
>>>
>>>
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>>
>> -- 
>> ==================================================
>> Haroldo Gambini Santos
>> D.Sc, Computer Science
>> Universidade Federal de Ouro Preto
>> http://www.decom.ufop.br/haroldo/
>
>

-- 
==================================================
Haroldo Gambini Santos
D.Sc, Computer Science
Universidade Federal de Ouro Preto
http://www.decom.ufop.br/haroldo/

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