def test_NEXT_check_ltl(self):
with tests.Configure(self, __file__, "/example.smv"):
status,l,trace = check.check_ltl(parseLTL("()() a"), 5)
self.assertEqual('Ok', status)
self.assertEqual(5, l)
self.assertIsNone(trace)
status,l,trace = check.check_ltl(parseLTL("() a"), 5)
self.assertEqual('Violation', status)
self.assertEqual(1, l)
self.assertIsNotNone(trace)
def test_EVENTUALLY_check_ltl(self):
with tests.Configure(self, __file__, "/example.smv"):
status,l,trace = check.check_ltl(parseLTL("<>(a <=> !b)"), 5)
self.assertEqual('Ok', status)
self.assertEqual(5, l)
self.assertIsNone(trace)
status,l,trace = check.check_ltl(parseLTL("<>(a & b)"), 5)
self.assertEqual('Violation', status)
self.assertEqual(2, l)
self.assertIsNotNone(trace)
def test_check_ltl_invariants(self):
"""
This tests the use of the invariants flag when performing the check.
"""
with tests.Configure(self, __file__, "/dummy_with_invar.smv"):
formula = parseLTL("[] v")
# invariants enforced
status,_,trace = check.check_ltl(formula, 10, no_invar=True)
self.assertEqual("Violation", status)
self.assertEqual(0, len(trace))
# invariants enforced
status,_,trace = check.check_ltl(formula, 10, no_invar=False)
self.assertEqual("Ok", status)
self.assertIsNone(trace)
def test_UNTIL_check_ltl(self):
with tests.Configure(self, __file__, "/never_b.smv"):
status,l,trace = check.check_ltl(parseLTL("b U a"), 5)
self.assertEqual('Ok', status)
self.assertEqual(5, l)
self.assertIsNone(trace)
status,l,trace = check.check_ltl(parseLTL("a U b"), 5)
self.assertEqual('Violation', status)
self.assertEqual(1, l)
self.assertIsNotNone(trace)
status,l,trace = check.check_ltl(parseLTL("b W !a"), 5)
self.assertEqual('Violation', status)
self.assertEqual(0, l)
self.assertIsNotNone(trace)
def check(formula, args):
try:
parsed_fml = parseLTL(formula.strip())
status,length,trace = check_ltl(parsed_fml, args.bound, args.no_fairness, args.no_invariants, args.dry_run)
if status != 'Ok':
print("-- {} for length {}".format(status, length))
print(trace)
except Exception as e:
print("The specification contains a syntax error")
print(e)
def test_check_ltl_arithmetics(self):
"""
This tests the use of the invariants flag when performing the check.
"""
with tests.Configure(self, __file__, "/numbers.smv"):
formula = parseLTL("[] a < 7")
status,_,trace = check.check_ltl(formula, 10, no_invar=False)
self.assertEqual("Ok", status)
self.assertIsNone(trace)
def test_check_ltl_fairness(self):
"""
This tests validates two features::
1. the use of a non-variable symbol in the formula
2. the use of the fairness flag when performing the check.
"""
with tests.Configure(self, __file__, "/philo.smv"):
# no one must wait forever:
# -> this is entailed by fair execution but not in general
formula = parseLTL("(!<>[](p1.waiting)) & (!<>[](p2.waiting))")
# unfair
status,_,trace = check.check_ltl(formula, 10, no_fairness=True)
self.assertEqual("Violation", status)
self.assertEqual(3, len(trace))
# fair exec only
status,_,trace = check.check_ltl(formula, 10, no_fairness=False)
self.assertEqual("Ok", status)
self.assertIsNone(trace)
