def test_msat_converter_on_msat_error(self):
import mathsat
import _mathsat
from pysmt.solvers.msat import MathSAT5Solver, MSatConverter
env = get_env()
msat = MathSAT5Solver(env, logic=QF_UFLIRA)
new_converter = MSatConverter(env, msat.msat_env)
def walk_plus(formula, args):
res = mathsat.MSAT_MAKE_ERROR_TERM()
return res
# Replace the function used to compute the Plus()
# with one that returns a msat_error
new_converter.set_function(walk_plus, op.PLUS)
r, s = FreshSymbol(REAL), FreshSymbol(REAL)
f1 = GT(r, s)
f2 = Plus(r, s)
t1 = new_converter.convert(f1)
self.assertFalse(mathsat.MSAT_ERROR_TERM(t1))
with self.assertRaises(InternalSolverError):
new_converter.convert(f2)
def test_msat_back_formulae(self):
from pysmt.solvers.msat import MathSAT5Solver, MSatConverter
env = get_env()
msat = MathSAT5Solver(environment=env, logic=QF_UFLIRA)
new_converter = MSatConverter(env, msat.msat_env)
for formula, _, _, logic in get_example_formulae():
if logic.quantifier_free:
term = new_converter.convert(formula)
res = new_converter.back(term)
self.assertTrue(is_valid(Iff(formula, res), logic=QF_UFLIRA))
def test_msat_back_not_identical(self):
from pysmt.solvers.msat import MathSAT5Solver, MSatConverter
env = get_env()
msat = MathSAT5Solver(environment=env, logic=QF_UFLIRA)
new_converter = MSatConverter(env, msat.msat_env)
r, s = FreshSymbol(REAL), FreshSymbol(REAL)
# r + 1 > s + 1
f = GT(Plus(r, Real(1)), Plus(s, Real(1)))
term = new_converter.convert(f)
res = new_converter.back(term)
self.assertFalse(f == res)
def test_msat_back_simple(self):
from pysmt.solvers.msat import MathSAT5Solver, MSatConverter
env = get_env()
msat = MathSAT5Solver(environment=env, logic=QF_UFLIRA)
new_converter = MSatConverter(env, msat.msat_env)
r, s = FreshSymbol(REAL), FreshSymbol(INT)
f1 = GT(r, Real(1))
f2 = LE(Plus(s, Int(2)), Int(3))
f3 = LE(Int(2), Int(3))
f = And(f1, f2, f3)
term = new_converter.convert(f)
res = new_converter.back(term)
# Checking equality is not enough: MathSAT can change the
# shape of the formula into a logically equivalent form.
self.assertTrue(is_valid(Iff(f, res), logic=QF_UFLIRA))
def test_msat_converter_on_msat_error(self):
import mathsat
from pysmt.solvers.msat import MathSAT5Solver, MSatConverter
env = get_env()
msat = MathSAT5Solver(env, logic=QF_UFLIRA)
class NewConverter(MSatConverter):
def walk_plus(self, formula, args, **kwargs):
res = mathsat.MSAT_MAKE_ERROR_TERM()
return res
new_converter = NewConverter(env, msat.msat_env)
r, s = FreshSymbol(REAL), FreshSymbol(REAL)
f1 = GT(r, s)
f2 = Plus(r, s)
t1 = new_converter.convert(f1)
self.assertFalse(mathsat.MSAT_ERROR_TERM(t1))
with self.assertRaises(InternalSolverError):
new_converter.convert(f2)