PredicateCPA can work with either LocationCPA or LocationCPABackwards (this was
commited earlier as part of a bigger commit; recommited for the "protocoll"). 



git-svn-id: https://svn.sosy-lab.org/software/cpachecker/trunk@13410 4712c6d2-40bb-43ae-aa4b-fec3f1bdfe4c