mirror of
https://github.com/AdaCore/cvc5.git
synced 2026-02-12 12:32:16 -08:00
47 lines
1.4 KiB
Python
47 lines
1.4 KiB
Python
|
#!/usr/bin/env python
|
||
|
|
###############################################################################
|
||
|
|
# Top contributors (to current version):
|
||
|
|
# Yoni Zohar
|
||
|
|
#
|
||
|
|
# This file is part of the cvc5 project.
|
||
|
|
#
|
||
|
|
# Copyright (c) 2009-2024 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.
|
||
|
|
# ############################################################################
|
||
|
|
#
|
||
|
|
# A simple demonstration of the solving capabilities of the cvc5 strings solver. A simple translation of the base python API
|
||
|
|
# example.
|
||
|
|
##
|
||
|
|
|
||
|
|
from cvc5.pythonic import *
|
||
|
|
|
||
|
|
if __name__ == "__main__":
|
||
|
|
x = Const("x", SeqSort(IntSort()))
|
||
|
|
y = Const("y", SeqSort(IntSort()))
|
||
|
|
|
||
|
|
# Empty sequence
|
||
|
|
empty = Empty(SeqSort(IntSort()))
|
||
|
|
# Sequence concatenation: x.y.empty
|
||
|
|
concat = Concat( x, y, empty)
|
||
|
|
# Sequence length: |x.y.empty|
|
||
|
|
concat_len = Length(concat)
|
||
|
|
# |x.y.empty| > 1
|
||
|
|
formula1 = (concat_len > 1)
|
||
|
|
# Sequence unit: seq(1)
|
||
|
|
unit = Unit(IntVal(1))
|
||
|
|
# x = seq(1)
|
||
|
|
formula2 = (x == unit)
|
||
|
|
|
||
|
|
# Make a query
|
||
|
|
q = And(formula1, formula2)
|
||
|
|
|
||
|
|
# Check satisfiability
|
||
|
|
s = Solver()
|
||
|
|
result = s.check([q])
|
||
|
|
assert result == sat
|
||
|
|
m = s.model()
|
||
|
|
print("x = {}".format(m[x]))
|
||
|
|
print("y = {}".format(m[y]))
|