def get_named_unsat_core(self):
"""After a call to solve() yielding UNSAT, returns the unsat core as a
dict of names to formulae"""
if self.options.unsat_cores_mode is None:
raise SolverNotConfiguredForUnsatCoresError
if self.last_result is not False:
raise SolverStatusError("The last call to solve() was not" \
" unsatisfiable")
if self.last_command != "solve":
raise SolverStatusError("The solver status has been modified by a" \
" '%s' command after the last call to" \
" solve()" % self.last_command)
assumptions = self.z3.unsat_core()
pysmt_assumptions = set(self.converter.back(t) for t in assumptions)
res = {}
n_ass_map = self._named_assertions_map()
cnt = 0
for key in pysmt_assumptions:
if key in n_ass_map:
(name, formula) = n_ass_map[key]
if name is None:
name = "_a_%d" % cnt
cnt += 1
res[name] = formula
return res
def _check_unsat_core_config(self):
if self.options.unsat_cores_mode is None:
raise SolverNotConfiguredForUnsatCoresError
if self.last_result is None or self.last_result:
raise SolverStatusError("The last call to solve() was not" \
" unsatisfiable")
if self.last_command != "solve":
raise SolverStatusError("The solver status has been modified by a" \
" '%s' command after the last call to" \
" solve()" % self.last_command)
def get_named_unsat_core(self):
"""After a call to solve() yielding UNSAT, returns the unsat core as a
dict of names to formulae"""
if self.options.unsat_cores_mode is None:
raise SolverNotConfiguredForUnsatCoresError
if self.last_result is not False:
raise SolverStatusError("The last call to solve() was not" \
" unsatisfiable")
if self.last_command != "solve":
raise SolverStatusError("The solver status has been modified by a" \
" '%s' command after the last call to" \
" solve()" % self.last_command)
assumptions = yicespy.term_vector_t()
yicespy.yices_init_term_vector(assumptions)
code = yicespy.yices_get_unsat_core(self.yices, assumptions)
if code != 0:
msg = yicespy.yices_error_string()
raise InternalSolverError("Yices returned non-zero code upon unsat core extraction"\
": %s (code: %s)" % \
(msg, code))
# for i in range(assumptions.size):
# d = assumptions.data[i]
# print(yicespy.yices_term_to_string(d, 200, 10, 0))
pysmt_assumptions = set(self.converter.back(assumptions.data[i]) for i in range(assumptions.size))
yicespy.yices_delete_term_vector(assumptions)
res = {}
n_ass_map = self._named_assertions_map()
cnt = 0
for key in pysmt_assumptions:
if key in n_ass_map:
(name, formula) = n_ass_map[key]
if name is None:
name = "_a_%d" % cnt
cnt += 1
res[name] = formula
return res
def solve_error(*args, **kwargs):
raise SolverStatusError(
"Cannot call is_sat twice when incrementality is disable")