[Scip] ZPL reader / Solution process deterministic?

Moritz Drexl Moritz.Drexl at inform-ac.com
Thu Sep 9 08:34:09 MEST 2010


Hi all and thanks for answering my last question!
 
I have two more questions:
 
1) I noticed that when reading my zimpl files directly in scip (via read file.zpl) the LPs get solved faster than with the indirect version where I generate an .lp file first and then read it in scip (read file.lp). What does the zimpl file reader do that zimpl itself doesn't do (or vice versa)?

2) I was wondering whether the solution process of scip is deterministic if all input and parameters are constant, or maybe if there is some randomness involved in choosing heuristics/branching rules/etc. If so, is there a way to make scip run deterministically?

Regards,
Moritz




More information about the Scip mailing list