[SCIP] Running SCIP with branching disabled

[Marc Pfetsch]

Dear Sergey,

you need to add a node limit and turn off strong-branching. In the
console this can be done as follows:

set limits nodes 1
set branching random priority 20000

(The last command prioritizes the random branching rule of the default
rule with strong branching).

Strong branching might also be the reason for the observed behavior.

Best

Marc


On 14/06/2021 11.57, Sergey Smirnov wrote:
> Dear SCIP community,
> can you tell me if it is possible to run SCIP in such a way, when only
> cuts (at root node) will be used and no branching?
> We use SCIP in "a console mode" as a standalone application.
> 
> My question is triggered by an effect my colleague found: one of
> commercial solvers solves some of Integer Linear Programming problems
> much faster by cuts only, without any branching. It was a kind of
> Constrained Programming problem, to find a feasible solution of a system
> of linear equations with binary variables.
> "Only cuts" took a few seconds and "cuts and branching" - a few minutes.
> 
> Regards,
> Sergey
> 
> 
> _______________________________________________
> Scip mailing list
> Scip at zib.de
> https://listserv.zib.de/mailman/listinfo/scip
>