Implemented first code for the predicate inference.

and (merged commits due to commit problems)...

(1) Fixed the general/abstract implementation of the array theory
(2) Fixed the implementation of the Z3 array-theory interface

git-svn-id: https://svn.sosy-lab.org/software/cpachecker/trunk@14598 4712c6d2-40bb-43ae-aa4b-fec3f1bdfe4c