Added code to make debugging of CPAs easier. The ARG can be dumped after
each iteration of the CPA algorithm by enabling the parameter
cpa.arg.dumpAfterIteration (=True).



git-svn-id: https://svn.sosy-lab.org/software/cpachecker/trunk@13383 4712c6d2-40bb-43ae-aa4b-fec3f1bdfe4c