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coin-or / Couenne

Convex Over and Under Envelopes for Nonlinear Estimation
Eclipse Public License 1.0
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Lots of output starting with "NLP Heuristic:" #47

Open michi7x7 opened 4 years ago

michi7x7 commented 4 years ago

When I run couenne, I get lots of output looking like this.

NLP Heuristic: time limit reached.
NLP Heuristic: time limit reached.
NLP Heuristic: no solution.
...

I'm using Version 0.5.7 (the AMPL build), but afaik the code that produces the output is unchanged: https://github.com/coin-or/Couenne/blob/master/src/heuristics/BonNlpHeuristic.cpp#L123 I tried to inhibit this output by passing outlev=0, but that didn't change anything.

The problem is, that running under Windows, this output really slows the whole computation down (CPU is only at ~30% on my notebook).

I do understand that my problem is probably ill defined, I'm new to MINLP and any advice (or helpful links) on speeding everthing up is appreciated (currently this runs for hours).

merraksh commented 4 years ago

Hi Michael,

 

apologies for the late reply. I agree that's too much output and I observed the same. I'm afraid the quickest way (apart from waiting for a release) is to remove those lines of code. Using coinbrew should speed up the build process.

 

Regards,

Pietro

   

Sent: Wednesday, June 03, 2020 at 6:14 PM From: "Michael Sieberer" notifications@github.com To: "coin-or/Couenne" Couenne@noreply.github.com Cc: "Subscribed" subscribed@noreply.github.com Subject: [coin-or/Couenne] Lots of output starting with "NLP Heuristic:" (#47)

 

When I run couenne, I get lots of output looking like this.

NLP Heuristic: time limit reached. NLP Heuristic: time limit reached. NLP Heuristic: no solution. ...

I'm using Version 0.5.7 (the AMPL build), but afaik the code that produces the output is unchanged: https://github.com/coin-or/Couenne/blob/master/src/heuristics/BonNlpHeuristic.cpp#L123 I tried to inhibit this output by passing outlev=0, but that didn't change anything.

The problem is, that running under Windows, this output really slows the whole computation down (CPU is only at ~30% on my notebook).

I do understand that my problem is probably ill defined, I'm new to MINLP and any advice (or helpful links) on speeding everthing up is appreciated (currently this runs for hours).

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