Multi-objective model checking only supports checking for a single state.
Previously, this check required a state-filter with a single matching state (e.g.,
the default filter(state, ..., "init") placed around a top-level expression).
Now, we check that statesOfInterest is a singleton set.
Thus, now expressions such as
filter(max, multi(P=?[...]. P>0.5[...], "label")
filter(print, multi(P=?[...]. P>0.5[...], "label")
with single-state labels will work.
git-svn-id: https://www.prismmodelchecker.org/svn/prism/prism/trunk@12033 bbc10eb1-c90d-0410-af57-cb519fbb1720