def check_unreal(
ltl_text,
part_text,
is_moore,
ltl3ba: LTL3BA,
solver_factory: Z3SolverFactory,
min_size,
max_size,
ltl3ba_timeout_sec=None,
opt_level=0,
) -> LTS:
"""
:raise: subprocess.TimeoutException
:arg opt_level: Note that opt_level > 0 may introduce unsoundness (returns unrealizable while it is)
"""
timer = Timer()
outputs, inputs, expr = parse_acacia_and_build_expr(ltl_text, part_text, ltl3ba, opt_level)
timer.sec_restart()
automaton = ltl3ba.convert(expr, timeout=ltl3ba_timeout_sec) # note no negation
logging.info("(unreal) automaton size is: %i" % len(automaton.nodes))
logging.debug("(unreal) automaton (dot) is:\n" + automaton2dot.to_dot(automaton))
logging.debug("(unreal) automaton translation took (sec): %i" % timer.sec_restart())
encoder = create_encoder(inputs, outputs, not is_moore, automaton, solver_factory.create())
model = model_searcher.search(min_size, max_size, encoder)
logging.debug("(unreal) model_searcher.search took (sec): %i" % timer.sec_restart())
return model
def check_real(ltl_text,
part_text,
is_moore,
ltl_to_atm: LTLToAutomaton,
solver: SolverInterface,
max_k: int,
min_size,
max_size,
opt_level=0) -> LTS:
"""
When opt_level>0, introduce incompleteness (but it is sound: if returns REAL, then REAL)
When max_k>0, reduce UCW to k-UCW.
"""
timer = Timer()
spec = parse_acacia_and_build_expr(ltl_text, part_text, ltl_to_atm,
opt_level)
logging.info("LTL formula size: %i", expr_size(spec.formula))
timer.sec_restart()
automaton = ltl_to_atm.convert(~spec.formula)
logging.info('automaton size is: %i' % len(automaton.nodes))
logging.debug('automaton (dot) is:\n' + automaton_to_dot.to_dot(automaton))
logging.debug('automaton translation took (sec): %i' % timer.sec_restart())
tau_desc = build_tau_desc(spec.inputs)
desc_by_output = dict(
(o, build_output_desc(o, is_moore, spec.inputs)) for o in spec.outputs)
if max_k == 0:
logging.info("using CoBuchiEncoder")
encoder = CoBuchiEncoder(automaton, tau_desc, spec.inputs,
desc_by_output, range(max_size))
model = model_searcher.search(min_size, max_size, encoder, solver)
else:
coreach_automaton = k_reduce(automaton, max_k)
# with open('/tmp/orig.dot', 'w') as f:
# f.write(automaton_to_dot.to_dot(automaton))
# with open('/tmp/red.dot', 'w') as f:
# f.write(automaton_to_dot.to_dot(coreach_automaton))
# exit()
logging.info("using CoReachEncoder")
logging.info('co-reachability automaton size is: %i' %
len(coreach_automaton.nodes))
logging.debug('co-reachability automaton (dot) is:\n' +
automaton_to_dot.to_dot(coreach_automaton))
encoder = CoreachEncoder(coreach_automaton, tau_desc, spec.inputs,
desc_by_output, range(max_size), max_k)
model = model_k_searcher.search(min_size, max_size, max_k, encoder,
solver)
logging.info('searching a model took (sec): %i' % timer.sec_restart())
return model
def check_unreal(ltl_text,
part_text,
is_moore,
ltl_to_atm: LTLToAutomaton,
solver: SolverInterface,
max_k: int,
min_size,
max_size,
opt_level=0) -> LTS:
"""
Note that opt_level > 0 may introduce unsoundness (returns unrealizable while it is).
"""
timer = Timer()
spec = parse_acacia_and_build_expr(ltl_text, part_text, ltl_to_atm,
opt_level)
logging.info("LTL formula size: %i", expr_size(spec.formula))
timer.sec_restart()
automaton = ltl_to_atm.convert(spec.formula)
logging.info('(unreal) automaton size is: %i' % len(automaton.nodes))
logging.debug('(unreal) automaton (dot) is:\n' +
automaton_to_dot.to_dot(automaton))
logging.debug('(unreal) automaton translation took (sec): %i' %
timer.sec_restart())
# note: inputs/outputs and machine type are reversed
tau_desc = build_tau_desc(spec.outputs)
desc_by_output = dict((i, build_output_desc(i, not is_moore, spec.outputs))
for i in spec.inputs)
if max_k == 0:
encoder = CoBuchiEncoder(automaton, tau_desc, spec.outputs,
desc_by_output, range(max_size))
model = model_searcher.search(min_size, max_size, encoder, solver)
else:
coreach_automaton = k_reduce(automaton, max_k)
logging.info("(unreal) using CoReachEncoder")
logging.info('(unreal) co-reachability automaton size is: %i' %
len(coreach_automaton.nodes))
logging.debug('(unreal) co-reachability automaton (dot) is:\n' +
automaton_to_dot.to_dot(coreach_automaton))
encoder = CoreachEncoder(coreach_automaton, tau_desc, spec.outputs,
desc_by_output, range(max_size), max_k)
model = model_k_searcher.search(min_size, max_size, max_k, encoder,
solver)
logging.debug('(unreal) model_searcher.search took (sec): %i' %
timer.sec_restart())
return model
def check_real(spec: Spec, min_size, max_size, ltl_to_atm: LTLToAutomaton,
solver_factory: Z3SolverFactory,
use_direct_encoding: bool) -> LTS or None:
shared_aht, dstFormPropMgr = SharedAHT(), DstFormulaPropMgr()
# normalize formula (negations appear only in front of basic propositions)
spec.formula = NNFNormalizer().dispatch(spec.formula)
logging.info("CTL* formula size: %i", expr_size(spec.formula))
if use_direct_encoding:
top_formula, atm_by_p, UCWs = automize_ctl(spec.formula, ltl_to_atm)
logging.info("Total number of states in sub-automata: %i",
sum([len(a.nodes) for a in atm_by_p.values()]))
for p, atm in atm_by_p.items():
logging.debug(str(p) + ', atm: \n' + automaton_to_dot.to_dot(atm))
encoder = CTLEncoderDirect(
top_formula, atm_by_p, UCWs, build_tau_desc(spec.inputs),
spec.inputs,
dict((o, build_output_desc(o, True, spec.inputs))
for o in spec.outputs), range(max_size))
else:
aht_automaton = ctl2aht.ctl2aht(spec, ltl_to_atm, shared_aht,
dstFormPropMgr)
aht_nodes, aht_transitions = get_reachable_from(
aht_automaton.init_node, shared_aht.transitions, dstFormPropMgr)
logging.info('The AHT automaton size (nodes/transitions) is: %i/%i' %
(len(aht_nodes), len(aht_transitions)))
if not aht_transitions:
logging.info('AHT is empty => the spec is unrealizable!')
return None
if logging.getLogger().isEnabledFor(
logging.DEBUG): # aht2dot takes long time
logging.debug('AHT automaton (dot) is...\n')
logging.debug(
aht2dot.convert(aht_automaton, shared_aht, dstFormPropMgr))
encoder = CTLEncoderViaAHT(
aht_automaton, aht_transitions, dstFormPropMgr,
build_tau_desc(spec.inputs), spec.inputs,
dict((o, build_output_desc(o, True, spec.inputs))
for o in spec.outputs), range(max_size))
model = model_searcher.search(min_size, max_size, encoder,
solver_factory.create())
return model
def check_real(
ltl_text, part_text, is_moore, ltl3ba, solver_factory: Z3SolverFactory, min_size, max_size, opt_level=2
) -> LTS:
"""
:param opt_level: values > 0 introduce incompleteness (but it is sound: if returns REAL, then REAL)
"""
timer = Timer()
inputs, outputs, expr = parse_acacia_and_build_expr(ltl_text, part_text, ltl3ba, opt_level)
timer.sec_restart()
automaton = ltl3ba.convert(~expr)
logging.info("(real) automaton size is: %i" % len(automaton.nodes))
logging.debug("(real) automaton (dot) is:\n" + automaton2dot.to_dot(automaton))
logging.debug("(real) automaton translation took (sec): %i" % timer.sec_restart())
encoder = create_encoder(inputs, outputs, is_moore, automaton, solver_factory.create())
model = model_searcher.search(min_size, max_size, encoder)
logging.debug("(real) model_searcher.search took (sec): %i" % timer.sec_restart())
return model
