[SCIP] calling CONSINITLP

[James Cussens]

Hi all and Happy New Year,

I am looking into using some superindicator constraints (in a pricer). Once the binary variable for a given superindicator constraint is fixed to one (by e.g. branching) I would like SCIPinitlpCons to be called on the corresponding "slack" constraint.

Looking at the CONSINITLP method of the superindicator constraint handler, I see that this happens if that method is called. But I am not clear when and how often CONSINITLP is called. The documentation tells me that "The CONSINITLP callback is executed before the first LP relaxation is solved." Is this the first LP relaxation of each node (ie before any pricing or cutting for that node), or only the first LP relaxation of the root?

James

James Cussens
Room MVB 3.26
School of Computer Science, University of Bristol
Phone: +44 (0)117 455 8723
https://jcussens.github.io/
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