[Cbc] New trunks and note on infeasibility ray.

[John Forrest]

Allan,

I attach a log of a run in debug mode.  It is in svn.  The idea is that 
you set extravariables to N and if there are less than N different 
costs, then up to N extra variables are created which have the objective 
and are the sum of the values of the corresponding integer variables.  
So the relevant lines with your problem are -

Problem has 218 integers (0 of which binary) and 0 continuous
218 integer have nonzero objective, 0 have zero objective, 8 different 
nonzero (taking abs)
48 variables have objective of 1
1 variables have objective of 4
28 variables have objective of 16.29
28 variables have objective of 31.58
8 variables have objective of 233.333
35 variables have objective of 1235.43
35 variables have objective of 1430.12
35 variables have objective of 2441.3
Replacing model - 7 new variables

For your problem, it works very well.

John

On 19/03/13 18:49, acw at ascent.com wrote:
> I'm obviously interested in the -extraVariables feature (though I'd 
> like some guidance on how to pick the value). Is this available now 
> from svn, or am I waiting for a version to be "published"?
>
> Allan Wechsler
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