1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
###############################################################################
# Top contributors (to current version):
# Alex Ozdemir, Aina Niemetz
#
# 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 test for cvc5's finite field solver.
#
##
import cvc5
from cvc5 import Kind
if __name__ == "__main__":
tm = cvc5.TermManager()
slv = cvc5.Solver(tm)
slv.setOption("produce-models", "true")
F = tm.mkFiniteFieldSort("5")
a = tm.mkConst(F, "a")
b = tm.mkConst(F, "b")
inv = tm.mkTerm(
Kind.EQUAL,
tm.mkTerm(Kind.FINITE_FIELD_MULT, a, b),
tm.mkFiniteFieldElem("1", F),
)
aIsTwo = tm.mkTerm(
Kind.EQUAL,
a,
tm.mkFiniteFieldElem("2", F),
)
# ab - 1 = 0
slv.assertFormula(inv)
# a = 2
slv.assertFormula(aIsTwo)
r = slv.checkSat()
# should be SAT, with b = 2^(-1)
assert r.isSat()
print(slv.getValue(a).toPythonObj())
assert slv.getValue(b).toPythonObj() == -2
bIsTwo = tm.mkTerm(
Kind.EQUAL,
b,
tm.mkFiniteFieldElem("2", F),
)
# b = 2
slv.assertFormula(bIsTwo)
r = slv.checkSat()
# should be UNSAT, since 2*2 - 1 != 0
assert not r.isSat()
|
