blob: a3c33f2ef459965fc30f1b00207cf08e54b79866 [file] [log] [blame]
 #!/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()