70 lines
1.7 KiB
Python
Executable File
70 lines
1.7 KiB
Python
Executable File
#!/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()
|