def test_sat(self):
ctx = Context()
ctx.SetLogic(Logic.QF_NRA)
ctx.DeclareVariable(x, -10, 10)
ctx.DeclareVariable(y, -10, 10)
ctx.Assert(x == y + 5)
ctx.Assert(y == 2)
result = ctx.CheckSat()
self.assertTrue(result)
self.assertEqual(result[y].mid(), 2)
self.assertEqual(result[x].mid(), 2 + 5)
ctx.Exit()
def test_unsat(self):
ctx = Context()
ctx.SetLogic(Logic.QF_NRA)
x = Variable("x")
y = Variable("y")
ctx.DeclareVariable(x, -10, 10)
ctx.DeclareVariable(y, -10, 10)
ctx.Assert(x == y + 5)
ctx.Assert(y == x - 3)
result = ctx.CheckSat()
self.assertFalse(result)
ctx.Exit()
def test_config(self):
ctx = Context()
config1 = ctx.config
self.assertEqual(config1.precision, 0.001)
config1.precision = 0.0001
self.assertEqual(ctx.config.precision, 0.0001)
def test_push_pop(self):
ctx = Context()
ctx.SetLogic(Logic.QF_NRA)
x = Variable("x")
y = Variable("y")
ctx.DeclareVariable(x)
ctx.SetInterval(x, -10, 10)
ctx.DeclareVariable(y, -10, 10)
ctx.Assert(x == y + 5)
ctx.Push(1)
ctx.Assert(y == x - 3)
result = ctx.CheckSat()
self.assertFalse(result)
ctx.Pop(1)
result = ctx.CheckSat()
self.assertTrue(result)
ctx.Exit()
self.assertTrue(ctx.box)