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main.py
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47 lines (41 loc) · 1.4 KB
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#!/usr/bin/env python
from wsat import Wsat
import argparse
from parse_cnf import parse_cnf
from infer import infer
import os
# parse args
parser = argparse.ArgumentParser(
description='sat solver based on walksat algorithm')
parser.add_argument(
"--max_flips", type=int, help='max number of flips, defaul 10000')
parser.add_argument(
"--p", type=float, help='probability to flip a coin, default 0.5')
parser.add_argument(
"-i", "--infer", type=str, help='inference query, must be negated first')
parser.add_argument(
"-v", "--verbose", help="print details", action="store_true")
parser.add_argument(
"input", metavar='INPUT', type=str, help='input in cse573 CNF format')
arguments = parser.parse_args()
def main():
max_flips = arguments.max_flips if arguments.max_flips else 10000
seed = os.urandom(4)
p = arguments.p if arguments.p else 0.5
(num_lit, clauses, var_map) = parse_cnf(arguments.input)
problem = Wsat(clauses, num_lit, p, max_flips, seed)
if arguments.verbose:
problem.print_info()
if arguments.infer:
if problem.solve():
print "KB is valid."
if infer(arguments.infer, var_map, problem):
print "Query is entailed."
else:
print "Query is not entailed."
else:
print "KB is not valid!"
else:
print problem.solve()
if __name__ == "__main__":
main()