def pop(self, levels=1):
for _ in xrange(levels):
if self.failed_pushes > 0:
self.failed_pushes -= 1
else:
c = yicespy.yices_pop(self.yices)
if c != 0:
raise InternalSolverError("Error in pop: %s" % \
yicespy.yices_error_string())
def pop(self, levels=1):
for _ in xrange(levels):
if self.failed_pushes > 0:
self.failed_pushes -= 1
else:
c = yicespy.yices_pop(self.yices)
if c != 0:
raise InternalSolverError("Error in pop: %s" % \
yicespy.yices_error_string())
def add_assertion(self, formula, named=None):
self._assert_is_boolean(formula)
term = self.converter.convert(formula)
code = yicespy.yices_assert_formula(self.yices, term)
if code != 0:
msg = yicespy.yices_error_string()
if code == -1 and "non-linear arithmetic" in msg:
raise NonLinearError(formula)
raise InternalSolverError("Yices returned non-zero code upon assert"\
": %s (code: %s)" % \
(msg, code))
def add_assertion(self, formula, named=None):
self._assert_is_boolean(formula)
term = self.converter.convert(formula)
code = yicespy.yices_assert_formula(self.yices, term)
if code != 0:
msg = yicespy.yices_error_string()
if code == -1 and "non-linear arithmetic" in msg:
raise NonLinearError(formula)
raise InternalSolverError("Yices returned non-zero code upon assert"\
": %s (code: %s)" % \
(msg, code))
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())
def _check_term_result(self, res):
if res == -1:
err = yicespy.yices_error_string()
raise InternalSolverError("Yices returned an error: " + err)
def _check_error(self, res):
if res != 0:
err = yicespy.yices_error_string()
raise InternalSolverError("Yices returned an error: " + err)
def _check_term_result(self, res):
if res == -1:
err = yicespy.yices_error_string()
raise InternalSolverError("Yices returned an error: " + err)
def _check_error(self, res):
if res != 0:
err = yicespy.yices_error_string()
raise InternalSolverError("Yices returned an error: " + err)