[Cbc] Huge constraint file

[Yves Touchard]

Hello,

I have a (huge, more than one million of lines...) constraint file (https://www.dropbox.com/s/6y7oid24ecv8oh7/huge.lp?dl=0) taking a long time (around 4 hours) to be solved (Log file: https://www.dropbox.com/s/rx7m8xtzbe9wsd8/huge.log.txt?dl=0)
I understand that such a huge file could be tricky for the solver. So, what is the best solution:

  *   Doing a pre-analysis to split the problem in two or more sub-problems.
  *   Use specific options to reduce elapsed time (in a deterministic way - such as gap). I tried with diving options but there was a memory allocation error (https://www.dropbox.com/s/rd00y6mfapedq17/hugeErr.log.txt?dl=0)
  *   Let you search and find if there is a way to speed up the coin process.

Thanks and regards,

Yves Touchard

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