def run_repl(env):
utility.touch(settings.get_history_file())
readline.read_history_file(settings.get_history_file())
while True:
try:
prog_str = input('> ').strip()
if prog_str.lower() == 'exit':
break
if prog_str.startswith(':set'):
parts = prog_str.split(' ')
if len(parts) > 1:
if parts[1] == 'debug':
settings.set_debug_level(1 if settings.get_debug_level() <= 0 else 0)
else:
prog = program.from_source(prog_str)
settings.log(0, lambda: str(prog))
prog.include_with_restrictions(env)
env = prog.evaluate()
except KeyboardInterrupt:
print('') # newline to go "below" the prompt
print("Use 'exit' to exit Pecan.")
except EOFError:
print('exit')
break
except UnexpectedToken as e:
print(e)
except Exception as e:
print('An exception occurred:', e)
readline.write_history_file(settings.get_history_file())
return env
def main():
parser = argparse.ArgumentParser(description='An automated theorem prover for Büchi Automata')
parser.add_argument('file', help='A Pecan file to execute', nargs='?')
parser.add_argument('-i', '--interactive', help='Run Pecan in interactive mode (REPL)', required=False, action='store_true')
parser.add_argument('-d', '--debug', help='Output debugging information', required=False, action='count')
parser.add_argument('-q', '--quiet', help='Quiet mode', required=False, action='store_true')
parser.add_argument('--no-opt', help='Turns off optimizations', required=False, action='store_true')
parser.add_argument('--min-opt', help='Set optimizations to minimal levels (only boolean and arithmetic optimizations).', required=False, action='store_true')
parser.add_argument('--no-stdlib', help='Turns off the default behavior of loading the standard library (from library/std.pn in your Pecan installation)', required=False, action='store_false')
parser.add_argument('--generate', help='Enumerate true statements, argument is how many variables to use', type=int, required=False)
parser.add_argument('--heuristics', help='Use heuristics to determine how to simplify automata. This flag is typically useful with large automata (>10000 states), and can cause worse performance with smaller automata.', required=False, action='store_true')
parser.add_argument('--extract-implications', help='Alternate mode of running a program involving going through each theorem, extracting the top-level implication that needs to be checked (if applicable).', required=False, action='store_true')
parser.add_argument('--use-var-map', help='Use the var_map from the specified file and convert the main file to use the same var map (i.e., the argument corresponding to <file>)', required=False, type=str)
parser.add_argument('--stats', help='Write out statistics about each predicate defined and theorem tested (i.e., in save_aut and assert_prop)', required=False, action='store_true')
parser.add_argument('--output-hoa', help='Outputs encountered Buchi automata into the file', required=False, type=str, dest="output_hoa", metavar="HOA_FILE")
parser.add_argument('--output-json', help='Write the output in a JSON format of {"stdout": str, "files": array of strings} where the files array is the names of all the files generated by the Pecan program to standard output when Pecan exists. Useful for running headless on a server to gather the result files.', required=False, action='store_true')
parser.add_argument('--no-progress', help='Disables all progress bars/indicators. Quiet mode implies this option is on. Should use if planning to pipe output to a file.', required=False, action='store_true')
args = parser.parse_args()
settings.set_quiet(args.quiet)
settings.set_opt_level(0 if args.no_opt else 1)
settings.set_load_stdlib(args.no_stdlib)
settings.set_use_heuristics(args.heuristics)
settings.set_min_opt(args.min_opt)
settings.set_extract_implications(args.extract_implications)
settings.set_write_statistics(args.stats)
settings.set_output_hoa(args.output_hoa)
settings.set_output_json(args.output_json)
settings.set_show_progress(not args.no_progress)
if args.debug is None:
settings.set_debug_level(0)
else:
settings.set_debug_level(args.debug)
if args.use_var_map is not None:
if args.file is None:
print('If --use-var-map is specified, you must also specify <file>!')
exit(1)
from pecan.tools.hoa_loader import load_hoa
use_var_map_aut = load_hoa(args.use_var_map)
main_file_aut = load_hoa(args.file)
ap_subs = {}
for v, aps in use_var_map_aut.get_var_map().items():
for main_ap, new_ap in zip(main_file_aut.get_var_map().get(v, []), aps):
ap_subs[main_ap] = new_ap
s = main_file_aut.aut.to_str('hoa')
for a,b in ap_subs.items():
s = s.replace(a, b)
print(s)
# print(ap_subs)
# main_file_aut = main_file_aut.ap_substitute(ap_subs)
# print(main_file_aut.to_str())
return
env = None
prog = None
if args.generate is not None:
for pred in theorem_generator.gen_thms(args.generate):
print(pred)
elif args.file is not None:
try:
prog = program.load(args.file)
if not settings.get_extract_implications():
env = prog.evaluate()
except UnexpectedToken as e:
print(e)
return None
elif not args.interactive:
parser.print_help()
if args.interactive:
if env is None:
prog = program.from_source('')
env = prog.evaluate()
prog = run_repl(env)
if settings.get_output_json():
if prog is not None:
print(json.dumps({'output': settings.get_output(), 'files': prog.get_generated_files()}))
else:
print(json.dumps({'output': '', 'files': []}))
def main():
parser = argparse.ArgumentParser(
description='An automated theorem prover for Büchi Automata')
parser.add_argument('file', help='A Pecan file to execute', nargs='?')
parser.add_argument('-i',
'--interactive',
help='Run Pecan in interactive mode (REPL)',
required=False,
action='store_true')
parser.add_argument('-d',
'--debug',
help='Output debugging information',
required=False,
action='count')
parser.add_argument('-q',
'--quiet',
help='Quiet mode',
required=False,
action='store_true')
parser.add_argument('--no-opt',
help='Turns off optimizations',
required=False,
action='store_true')
parser.add_argument(
'--no-stdlib',
help=
'Turns off the default behavior of loading the standard library (from library/std.pn in your Pecan installation)',
required=False,
action='store_false')
parser.add_argument(
'--generate',
help='Enumerate true statements, argument is how many variables to use',
type=int,
required=False)
args = parser.parse_args()
if args.debug is None:
settings.set_debug_level(0)
else:
settings.set_debug_level(args.debug)
settings.set_quiet(args.quiet)
settings.set_opt_level(0 if args.no_opt else 1)
settings.set_load_stdlib(args.no_stdlib)
env = None
if args.generate is not None:
for pred in theorem_generator.gen_thms(args.generate):
print(pred)
elif args.file is not None:
try:
prog = program.load(args.file)
env = prog.evaluate()
except UnexpectedToken as e:
print(e)
return None
elif not args.interactive:
parser.print_help()
if args.interactive:
if env is None:
prog = program.from_source('')
env = prog.evaluate()
run_repl(env)