[SCIP] Presolving time-limits

[Jan Berling]

Dear Marc,

thank you for your answer!

I will set a timelimit to scip in in my code and then restart the solution
without presolvers.

Maybe the solutions are only processed before presolving when using the
shell. With SCIPaddSol() they are not checked before AFAIK.

Best regards and a nice weekend,
Jan

Am Fr., 3. Juli 2020 um 17:29 Uhr schrieb Marc Pfetsch <
pfetsch at mathematik.tu-darmstadt.de>:

>
>
> Dear Jan!
>
> > is it possible to set a time limit on presolving?
>
> There is not separate time limit for presolving.
>
> However, you can try the following: in the command line, you can try to
> set a time limit, presolve and then extend the time limit again.  When
> you continue the optimization, SCIP will finish presolving, however.
> This can be avoided by "set presolving maxrounds 0". If then continue,
> SCIP will finish presolving, but not perform time consuming steps.
>
> > On a related note, solutions in the storage are processed after
> > presolving. Is it possible to do this before so that SCIP accepts the
> > feasible solutions and sets the upper bound accordingly?
>
> I thought that stored solutions would also be processed before
> presolving. However, additional heuristics may only run after presolving.
>
> Best
>
> Marc
> _______________________________________________
> Scip mailing list
> Scip at zib.de
> https://listserv.zib.de/mailman/listinfo/scip
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listserv.zib.de/pipermail/scip/attachments/20200703/398506b8/attachment.html>