def is_unsat(self, formula, solver_name=None, logic=None, portfolio=None):
if portfolio is not None:
solver = Portfolio(solvers_set=portfolio,
environment=self.environment,
logic=logic,
generate_models=False, incremental=False)
else:
solver = self.Solver(name=solver_name, logic=logic,
generate_models=False, incremental=False)
with solver:
return solver.is_unsat(formula)
def is_unsat(self, formula, solver_name=None, logic=None, portfolio=None):
if logic is None or logic == AUTO_LOGIC:
logic = get_logic(formula, self.environment)
if portfolio is not None:
solver = Portfolio(solvers_set=portfolio,
environment=self.environment,
logic=logic,
generate_models=False, incremental=False)
else:
solver = self.Solver(name=solver_name, logic=logic,
generate_models=False, incremental=False)
with solver:
return solver.is_unsat(formula)
def is_valid(self, formula, solver_name=None, logic=None, portfolio=None):
if logic is None or logic == AUTO_LOGIC:
logic = get_logic(formula, self.environment)
if portfolio is not None:
solver = Portfolio(solvers_set=portfolio,
environment=self.environment,
logic=logic,
generate_models=False, incremental=False)
else:
solver = self.Solver(name=solver_name, logic=logic,
generate_models=False, incremental=False)
with solver:
return solver.is_valid(formula)
def test_smtlib_multi_msat(self):
from pysmt.test.smtlib.parser_utils import SMTLIB_TEST_FILES, SMTLIB_DIR
# On some platforms (Windows x64) the internal pickling process requires
# quite a lot of recursion...
old_recursion_limit = sys.getrecursionlimit()
sys.setrecursionlimit(999999)
for (logic, f, expected_result) in SMTLIB_TEST_FILES:
smtfile = os.path.join(SMTLIB_DIR, f)
if logic <= QF_UFLIRA:
env = reset_env()
formula = get_formula_fname(smtfile, env)
# Simplifying the formula to reduce its depth to avoid errors on some
# platforms until issue #455 for details.
formula = formula.simplify()
with Portfolio([("msat", {
"random_seed": 1
}), ("msat", {
"random_seed": 17
}), ("msat", {
"random_seed": 42
})],
logic=logic,
environment=env,
incremental=False,
generate_models=False) as s:
res = s.is_sat(formula)
self.assertEqual(expected_result, res, smtfile)
#reset recursion limit
sys.setrecursionlimit(old_recursion_limit)
def run_smtlib(self, smtfile, logic, expected_result):
env = reset_env()
formula = get_formula_fname(smtfile, env)
with Portfolio(["cvc4", "msat", "yices"],
logic=logic,
environment=env,
incremental=False,
generate_models=False) as s:
res = s.is_sat(formula)
self.assertEqual(expected_result, res, smtfile)
def test_basic(self):
with Portfolio(["z3", "msat", "cvc4"],
environment=self.env,
logic="QF_LRA") as p:
for example in get_example_formulae():
if not example.logic <= QF_LRA: continue
res = p.is_sat(example.expr)
self.assertEqual(res, example.is_sat, example.expr)
if res:
self.assertTrue(p.get_model().get_value(
example.expr).is_true())
def test_get_value(self):
with Portfolio(["msat", "picosat", "btor", "bdd"],
logic=QF_UFLIRA,
environment=self.env,
incremental=False,
generate_models=True) as s:
x, y = Symbol("x"), Symbol("y")
s.add_assertion(Implies(x, y))
s.add_assertion(x)
res = s.solve()
self.assertTrue(res)
v = s.get_value(x)
self.assertTrue(v, TRUE())
def test_exceptions(self):
with Portfolio(["bdd", "z3"],
logic=QF_BOOL,
environment=self.env,
incremental=True,
generate_models=True,
solver_options={"exit_on_exception": False}) as s:
s.add_assertion(Equals(Symbol("r", REAL), Symbol("r", REAL)))
res = s.solve()
self.assertTrue(res)
# TODO: How can we make this test more robust?
# It assumes that bdd will raise an error before z3.
# It should be so, but this is non-deterministic by nature
with Portfolio(["bdd", "z3"],
logic=QF_BOOL,
environment=self.env,
incremental=True,
generate_models=True,
solver_options={"exit_on_exception": True}) as s:
s.add_assertion(Equals(Symbol("r", REAL), Symbol("r", REAL)))
with self.assertRaises(Exception):
s.solve()
def test_incrementality(self):
with Portfolio(["cvc4", "msat", "yices"],
logic=QF_UFLIRA,
environment=self.env,
incremental=True,
generate_models=True) as s:
x, y = Symbol("x"), Symbol("y")
s.add_assertion(Implies(x, y))
s.push()
s.add_assertion(x)
res = s.solve()
self.assertTrue(res)
v = s.get_value(y)
self.assertTrue(v, TRUE())
s.pop()
s.add_assertion(x)
res = s.solve()
self.assertTrue(res)
v = s.get_value(x)
self.assertTrue(v, FALSE())
def test_smtlib_multi_msat(self):
from pysmt.test.smtlib.parser_utils import SMTLIB_TEST_FILES, SMTLIB_DIR
for (logic, f, expected_result) in SMTLIB_TEST_FILES:
smtfile = os.path.join(SMTLIB_DIR, f)
if logic <= QF_UFLIRA:
env = reset_env()
formula = get_formula_fname(smtfile, env)
with Portfolio([("msat", {
"random_seed": 1
}), ("msat", {
"random_seed": 17
}), ("msat", {
"random_seed": 42
})],
logic=logic,
environment=env,
incremental=False,
generate_models=False) as s:
res = s.is_sat(formula)
self.assertEqual(expected_result, res, smtfile)