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Merge pull request #375 from pysmt/sorts
Handling of Sorts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,176 @@ | ||
| # | ||
| # This file is part of pySMT. | ||
| # | ||
| # Copyright 2014 Andrea Micheli and Marco Gario | ||
| # | ||
| # Licensed under the Apache License, Version 2.0 (the "License"); | ||
| # you may not use this file except in compliance with the License. | ||
| # You may obtain a copy of the License at | ||
| # | ||
| # http://www.apache.org/licenses/LICENSE-2.0 | ||
| # | ||
| # Unless required by applicable law or agreed to in writing, software | ||
| # distributed under the License is distributed on an "AS IS" BASIS, | ||
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| # See the License for the specific language governing permissions and | ||
| # limitations under the License. | ||
| # | ||
| from six import StringIO | ||
|
|
||
| from pysmt.shortcuts import FreshSymbol, EqualsOrIff, Select, TRUE, FALSE, Function | ||
| from pysmt.shortcuts import Array, BV | ||
| from pysmt.typing import INT, BOOL, REAL | ||
| from pysmt.typing import Type, ArrayType, FunctionType, BVType | ||
| from pysmt.typing import PartialType | ||
| from pysmt.test import TestCase, main | ||
| from pysmt.smtlib.parser import SmtLibParser | ||
| from pysmt.exceptions import PysmtValueError, PysmtTypeError | ||
|
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|
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| SMTLIB_SRC="""\ | ||
| (define-sort Set (T) (Array T Bool)) | ||
| (define-sort I () Int) | ||
| (declare-const s1 (Set I)) | ||
| (declare-const a I) | ||
| (declare-const b Int) | ||
| (assert (= (select s1 a) true)) | ||
| (assert (= (select s1 b) false)) | ||
| (check-sat) | ||
| """ | ||
|
|
||
| class TestSorts(TestCase): | ||
|
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| def test_smtlib_sort(self): | ||
| # parser = SmtLibParser() | ||
| # buf = StringIO(SMTLIB_SRC) | ||
| # script = parser.get_script(buf) | ||
| pass | ||
|
|
||
| def test_basic_types(self): | ||
| self.assertTrue(BOOL.is_bool_type()) | ||
| self.assertFalse(BOOL.is_function_type()) | ||
|
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| self.assertTrue(REAL.is_real_type()) | ||
| self.assertFalse(REAL.is_bool_type()) | ||
|
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| self.assertTrue(INT.is_int_type()) | ||
| self.assertFalse(INT.is_real_type()) | ||
|
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| ftype = FunctionType(REAL, [REAL, REAL]) | ||
| self.assertTrue(ftype.is_function_type()) | ||
| self.assertFalse(ftype.is_int_type()) | ||
|
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| self.assertNotEqual(BOOL, INT) | ||
| self.assertEqual(REAL, REAL) | ||
|
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| AAIBR = ArrayType(ArrayType(INT, BOOL), REAL) | ||
| self.assertEqual(str(AAIBR), "Array{Array{Int, Bool}, Real}") | ||
|
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| bt1 = BVType(4) | ||
| bt2 = BVType(4) | ||
| self.assertEqual(bt1, bt2) | ||
| self.assertEqual(bt1.width, 4) | ||
|
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| def test_fake_arrays(self): | ||
| FakeArrayType = Type("FakeArray", 2) | ||
| with self.assertRaises(PysmtValueError): | ||
| FreshSymbol(FakeArrayType) | ||
| FakeArrayII = FakeArrayType(INT, INT) | ||
| self.assertEqual(str(FakeArrayII), "FakeArray{Int, Int}") | ||
| self.assertEqual(FakeArrayII.as_smtlib(False), "(FakeArray Int Int)") | ||
| s = FreshSymbol(FakeArrayII) | ||
| self.assertIsNotNone(s) | ||
|
|
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| def test_simple_sorts(self): | ||
| # (define-sort I () Int) | ||
| # (define-sort Set (T) (Array T Bool)) | ||
| I = INT | ||
| SET = PartialType("Set", lambda t1: ArrayType(t1, BOOL)) | ||
| self.assertEqual(ArrayType(INT, BOOL), SET(I)) | ||
|
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| # (declare-const s1 (Set I)) | ||
| # (declare-const a I) | ||
| # (declare-const b Int) | ||
| s1 = FreshSymbol(SET(I)) | ||
| a = FreshSymbol(I) | ||
| b = FreshSymbol(INT) | ||
|
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| # (= (select s1 a) true) | ||
| # (= (select s1 b) false) | ||
| f1 = EqualsOrIff(Select(s1, a), TRUE()) | ||
| f2 = EqualsOrIff(Select(s1, b), FALSE()) | ||
| self.assertIsNotNone(f1) | ||
| self.assertIsNotNone(f2) | ||
|
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| # Cannot instantiate a PartialType directly: | ||
| with self.assertRaises(PysmtValueError): | ||
| FreshSymbol(SET) | ||
|
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| # (declare-sort A 0) | ||
| # Uninterpreted sort | ||
| A = Type("A", 0) | ||
| B = Type("B") | ||
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| c1 = FreshSymbol(A) | ||
| c2 = FreshSymbol(A) | ||
| c3 = FreshSymbol(Type("A")) | ||
| c4 = FreshSymbol(B) | ||
| EqualsOrIff(c1, c2) | ||
| EqualsOrIff(c2, c3) | ||
| with self.assertRaises(PysmtTypeError): | ||
| EqualsOrIff(c1, c4) | ||
|
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| with self.assertRaises(PysmtValueError): | ||
| Type("A", 1) | ||
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| C = Type("C", 1) | ||
| c5 = FreshSymbol(C(A)) | ||
| c6 = FreshSymbol(C(B)) | ||
| self.assertIsNotNone(c5) | ||
| with self.assertRaises(PysmtTypeError): | ||
| EqualsOrIff(c5, c6) | ||
|
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| # Nesting | ||
| ty = C(C(C(C(C(A))))) | ||
| self.assertIsNotNone(FreshSymbol(ty)) | ||
|
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| pty = PartialType("pty", lambda S,T: S(S(S(S(S(T)))))) | ||
| self.assertEqual(pty(C,A), ty) | ||
|
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| def test_normalization(self): | ||
| from pysmt.environment import Environment | ||
|
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| env2 = Environment() | ||
| mgr2 = env2.formula_manager | ||
|
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| ty = ArrayType(BOOL, REAL) | ||
| x = FreshSymbol(ty) | ||
| fty = FunctionType(BOOL, (ty,)) | ||
| f = FreshSymbol(fty) | ||
| g = Function(f, (x,)) | ||
| self.assertIsNotNone(g) | ||
| self.assertNotIn(g, mgr2) | ||
| g2 = mgr2.normalize(g) | ||
| self.assertIn(g2, mgr2) | ||
| # Since the types are from two different environments, they | ||
| # should be different. | ||
| x2 = g2.arg(0) | ||
| ty2 = x2.symbol_type() | ||
| self.assertFalse(ty2 is ty, ty) | ||
| fname = g2.function_name() | ||
| fty2 = fname.symbol_type() | ||
| self.assertFalse(fty2 is fty, fty) | ||
|
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| # Test ArrayValue | ||
| h = Array(BVType(4), BV(0, 4)) | ||
| h2 = mgr2.normalize(h) | ||
| self.assertEqual(h.array_value_index_type(), | ||
| h2.array_value_index_type()) | ||
| self.assertFalse(h.array_value_index_type() is \ | ||
| h2.array_value_index_type()) | ||
|
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|
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| if __name__ == '__main__': | ||
| main() |
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