Compute IIS

Type

Selection

Range

The settings listed below

Default

Off

In case of an infeasible problem, this option can be used to search for an irreducibly inconsistent system (IIS), in case the general solvers option Infeasibility Finder is switched on. Possible values are:

• Off

• Algorithm 1

• Algorithm 2

• Algorithm 3

• Algorithm 4

• Algorithm 5

Algorithm 1 is based on a fast heuristic that may result in an infeasible set that could be possibly further reduced. Algorithm 2 uses a deletion filtering algorithm. Algorithm 3 uses an addition filtering algorithm. Algorithm 4 uses an addition-deletion filtering algorithm. Algorithm 5 uses a depth-first search algorithm.

The option IIS Include Integers determines whether or not general integer variables should be considered as potential members of an IIS.

Learn more about

• IIS include integers

• Infeasibility Finder