def test_setOutputFile(self):
# this tests the deprecated setOutputFile interface
test_file = tempfile.NamedTemporaryFile()
filename = test_file.name
test_file.close()
monosat.Monosat().newSolver(arguments="-decide-theories")
with warnings.catch_warnings(record=True) as w:
warnings.simplefilter("always")
monosat.Monosat().setOutputFile(output_file=filename)
self.assertEqual(len(w), 1)
self.assertTrue(issubclass(w[-1].category, DeprecationWarning))
self.assertTrue("deprecated" in str(w[-1].message))
a = monosat.Var()
b = monosat.Var()
c = monosat.Or(a, monosat.Not(b))
monosat.Assert(c)
monosat.Assert(monosat.Not(c))
# trivial contradition, so result should be UNSAT
result = monosat.Solve()
self.assertFalse(result)
monosat.Monosat().newSolver(
) # create a new solver, this time without any output file set.
# solver now has no constraints, so it should be SAT
self.assertTrue(monosat.Solve())
# read in the previously saved constraints (these can also be read in on the command line, eg ./monosat tutorial.gnf
monosat.Monosat().loadConstraints(filename)
result2 = monosat.Solve()
self.assertEqual(result, result2)
os.remove(filename)
def test_output(self):
# To write to an output file, create a new solver and pass it the name of a file to write to
# All constraints created in that new solver will be copied to that file
test_file = tempfile.NamedTemporaryFile()
filename = test_file.name
test_file.close()
monosat.Monosat().newSolver(output_file=filename)
a = monosat.Var()
b = monosat.Var()
c = monosat.Or(a, monosat.Not(b))
monosat.Assert(c)
monosat.Assert(monosat.Not(c))
# trivial contradition, so result should be UNSAT
result = monosat.Solve()
self.assertFalse(result)
monosat.Monosat().newSolver(
) # create a new solver, this time without any output file set.
# solver now has no constraints, so it should be SAT
self.assertTrue(monosat.Solve())
# read in the previously saved constraints (these can also be read in on the command line, eg ./monosat tutorial.gnf
monosat.Monosat().loadConstraints(filename)
result2 = monosat.Solve()
self.assertEqual(result, result2)
os.remove(filename)
def Not(self, *args):
return ms.Not(*args)