Let the ValueAnalysisCPA use the information from the live variables computation. This feature is toggled by "cfa.findLiveVariables=true". By using this information, variables that are not live are removed from the state via the precision adjustment operator.

git-svn-id: https://svn.sosy-lab.org/software/cpachecker/trunk@14450 4712c6d2-40bb-43ae-aa4b-fec3f1bdfe4c