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###############################################################################
# Top contributors (to current version):
# Alex Ozdemir
#
# This file is part of the cvc5 project.
#
# Copyright (c) 2009-2025 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 capabilities of cvc5
#
# A simple demonstration of how to use uninterpreted functions, combining this
# with arithmetic, and extracting a model at the end of a satisfiable query.
# The model is displayed using getValue().
##
from cvc5.pythonic import *
if __name__ == "__main__":
U = DeclareSort("U")
x, y = Consts("x y", U)
f = Function("f", U, IntSort())
p = Function("p", IntSort(), BoolSort())
assumptions = [f(x) >= 0, f(y) >= 0, f(x) + f(y) <= 1, Not(p(0)), p(f(y))]
prove(Implies(And(assumptions), x != y))
s = Solver()
s.add(assumptions)
assert sat == s.check()
m = s.model()
def print_val(t):
print("{}: {}".format(t, m[t]))
# print the of some terms
print_val(f(x))
print_val(f(y))
print_val(f(x) + f(y))
print_val(p(0))
print_val(p(f(y)))
# print value of *all* terms
def print_all_subterms(t):
print_val(t)
for c in t.children():
print_all_subterms(c)
print_all_subterms(And(assumptions))
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