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#####################
## test_term.py
## Top contributors (to current version):
## Makai Mann, Andres Noetzli
## This file is part of the CVC4 project.
## Copyright (c) 2009-2020 by the authors listed in the file AUTHORS
## in the top-level source directory and their institutional affiliations.
## All rights reserved. See the file COPYING in the top-level source
## directory for licensing information.
##
import pytest
import pycvc4
from pycvc4 import kinds
def test_getitem():
solver = pycvc4.Solver()
intsort = solver.getIntegerSort()
x = solver.mkConst(intsort, 'x')
y = solver.mkConst(intsort, 'y')
xpy = solver.mkTerm(kinds.Plus, x, y)
assert xpy[0] == x
assert xpy[1] == y
def test_get_kind():
solver = pycvc4.Solver()
intsort = solver.getIntegerSort()
x = solver.mkConst(intsort, 'x')
y = solver.mkConst(intsort, 'y')
xpy = solver.mkTerm(kinds.Plus, x, y)
assert xpy.getKind() == kinds.Plus
funsort = solver.mkFunctionSort(intsort, intsort)
f = solver.mkConst(funsort, 'f')
assert f.getKind() == kinds.Constant
fx = solver.mkTerm(kinds.ApplyUf, f, x)
assert fx.getKind() == kinds.ApplyUf
# Sequence kinds do not exist internally, test that the API properly
# converts them back.
seqsort = solver.mkSequenceSort(intsort)
s = solver.mkConst(seqsort, 's')
ss = solver.mkTerm(kinds.SeqConcat, s, s)
assert ss.getKind() == kinds.SeqConcat
def test_eq():
solver = pycvc4.Solver()
usort = solver.mkUninterpretedSort('u')
x = solver.mkConst(usort, 'x')
y = solver.mkConst(usort, 'y')
z = x
assert x == x
assert x == z
assert not (x != x)
assert x != y
assert y != z
def test_get_sort():
solver = pycvc4.Solver()
intsort = solver.getIntegerSort()
bvsort8 = solver.mkBitVectorSort(8)
x = solver.mkConst(intsort, 'x')
y = solver.mkConst(intsort, 'y')
a = solver.mkConst(bvsort8, 'a')
b = solver.mkConst(bvsort8, 'b')
assert x.getSort() == intsort
assert solver.mkTerm(kinds.Plus, x, y).getSort() == intsort
assert a.getSort() == bvsort8
assert solver.mkTerm(kinds.BVConcat, a, b).getSort() == solver.mkBitVectorSort(16)
def test_get_op():
solver = pycvc4.Solver()
intsort = solver.getIntegerSort()
funsort = solver.mkFunctionSort(intsort, intsort)
x = solver.mkConst(intsort, 'x')
f = solver.mkConst(funsort, 'f')
fx = solver.mkTerm(kinds.ApplyUf, f, x)
assert not x.hasOp()
try:
op = x.getOp()
assert False
except:
assert True
assert fx.hasOp()
assert fx.getOp().getKind() == kinds.ApplyUf
# equivalent check
assert fx.getOp() == solver.mkOp(kinds.ApplyUf)
def test_const_sequence_elements():
solver = pycvc4.Solver()
realsort = solver.getRealSort()
seqsort = solver.mkSequenceSort(realsort)
s = solver.mkEmptySequence(seqsort)
assert s.getKind() == kinds.ConstSequence
# empty sequence has zero elements
cs = s.getConstSequenceElements()
assert len(cs) == 0
# A seq.unit app is not a constant sequence (regardless of whether it is
# applied to a constant).
su = solver.mkTerm(kinds.SeqUnit, solver.mkReal(1))
try:
su.getConstSequenceElements()
assert False
except:
assert True
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