def push(self, levels=1):
for _ in xrange(levels):
c = yicespy.yices_push(self.yices)
if c != 0:
# 4 is STATUS_UNSAT
if yicespy.yices_context_status(self.yices) == 4:
# Yices fails to push if the context is in UNSAT state
# (It makes no sense to conjoin formulae to False)
# PySMT allows this and we support it by counting the
# spurious push calls
self.failed_pushes += 1
else:
raise InternalSolverError("Error in push: %s" % \
yicespy.yices_error_string())
def push(self, levels=1):
for _ in xrange(levels):
c = yicespy.yices_push(self.yices)
if c != 0:
# 4 is STATUS_UNSAT
if yicespy.yices_context_status(self.yices) == 4:
# Yices fails to push if the context is in UNSAT state
# (It makes no sense to conjoin formulae to False)
# PySMT allows this and we support it by counting the
# spurious push calls
self.failed_pushes += 1
else:
raise InternalSolverError("Error in push: %s" % \
yicespy.yices_error_string())