support for CVC4 1.1 and 1.2
support for CVC4 1.1 and 1.2

douglas-larocca/why3,jpdeplaix/why3,douglas-larocca/why3,jpdeplaix/why3,jpdeplaix/why3,ssaavedra/why3,ssaavedra/why3,douglas-larocca/why3,ssaavedra/why3