def test_random_operator(self):
operator = self.operator
random.seed("Tara ra ra ta")
for _ in xrange(100):
N = random.randint(2, self.topN)
M = 2 ** N
a = Integer(N)
b = Integer(N)
c = operator(a, b)
va = random.randint(0, M - 1)
vb = random.randint(0, M - 1)
try:
vc = operator(va, vb) % M
except ZeroDivisionError:
continue
assign = {}
assign.update(a.build_assignment(va))
assign.update(b.build_assignment(vb))
assign.update(c.build_assignment(vc))
formula = c.get_propositional_formula()
self.assertNotEqual(solve(formula, assign), None,
"Model is UNSAT for a={} b={} c={}\n".format(va, vb, vc))
a.make_constant(va)
b.make_constant(vb)
c.make_constant(vc)
formula = c.get_propositional_formula()
self.assertNotEqual(solve(formula), None)
def test_random_wrong_operator(self):
operator = self.operator
random.seed("Tara ra ra ta ta ra ra ra ta")
N = 5
M = 2 ** N
for _ in xrange(10):
a = Integer(N)
b = Integer(N)
c = operator(a, b)
va = random.randint(0, M - 1)
vb = random.randint(0, M - 1)
try:
correct = operator(va, vb) % M
except ZeroDivisionError:
continue
a.make_constant(va)
b.make_constant(vb)
for vc in xrange(M):
if vc == correct:
continue
c.make_constant(vc)
formula = c.get_propositional_formula()
model = solve(formula)
self.assertEqual(model, None,
"Model is SAT for a={} b={} c={}\n".format(va, vb, vc))