[Cbc] Another problem "long to be solved"

[Yves Touchard]

Hello,

I split an huge problem in several little problems which sizes are (IMO) equivalent.
Solving each of them lasts several seconds (no more than 2-3 seconds) except one (several minutes).
I tried different combination of options (w/wo diving, w/wo zero root...) without any success. (threads 104 ratio 0.05 cutlength 40 multiple 4 divingv on divingl on divingf on divingg on divingc on divingp on zero root)

Have you an idea to help this problem to be fastly solved ? Or my splitting and the cost function are not well balanced ?
The constraint file may be downloaded here:
https://www.dropbox.com/s/lbd7o2bdn5392m1/long.lp?dl=0
One of the sol file may be downloaded here:
https://www.dropbox.com/s/a7foc860ap6lbmn/long.txt?dl=0

I use the the trunk version, revision #2092, compiled with gcc 4.9.0

Thanks and regards

Yves

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