blob: a3c33f2ef459965fc30f1b00207cf08e54b79866 (
plain)
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
61
62
63
64
65
66
67
68
69
70
71
|
#!/usr/bin/env python
"""
Helper script to convert the log generated by '-debug-only=constraint-system'
to a Python script that uses Z3 to verify the decisions using Z3's Python API.
Example usage:
> cat path/to/file.log
---
x6 + -1 * x7 <= -1
x6 + -1 * x7 <= -2
sat
> ./convert-constraint-log-to-z3.py path/to/file.log > check.py && python ./check.py
> cat check.py
from z3 import *
x3 = Int("x3")
x1 = Int("x1")
x2 = Int("x2")
s = Solver()
s.add(x1 + -1 * x2 <= 0)
s.add(x2 + -1 * x3 <= 0)
s.add(-1 * x1 + x3 <= -1)
assert(s.check() == unsat)
print('all checks passed')
"""
import argparse
import re
def main():
parser = argparse.ArgumentParser(
description="Convert constraint log to script to verify using Z3."
)
parser.add_argument(
"log_file", metavar="log", type=str, help="constraint-system log file"
)
args = parser.parse_args()
content = ""
with open(args.log_file, "rt") as f:
content = f.read()
groups = content.split("---")
var_re = re.compile("x\d+")
print("from z3 import *")
for group in groups:
constraints = [g.strip() for g in group.split("\n") if g.strip() != ""]
variables = set()
for c in constraints[:-1]:
for m in var_re.finditer(c):
variables.add(m.group())
if len(variables) == 0:
continue
for v in variables:
print('{} = Int("{}")'.format(v, v))
print("s = Solver()")
for c in constraints[:-1]:
print("s.add({})".format(c))
expected = constraints[-1].strip()
print("assert(s.check() == {})".format(expected))
print('print("all checks passed")')
if __name__ == "__main__":
main()
|
