fix for SubtreeRemover: removing the second state of a reachedset leads to a cache-update with a new key (e,p2,B) with refined precision p2. However the precision was not updated in the next outer reachedset, causing a cache miss and re-exploration of the same error path. The problem appears with Predicate-SBE or ValueAnalysis. With PredicateLBE the refinement was (maybe) never done at the second location of a BAM-block.

git-svn-id: https://svn.sosy-lab.org/software/cpachecker/branches/bamRecursion@13739 4712c6d2-40bb-43ae-aa4b-fec3f1bdfe4c