def get_architecture_trans_assumption(self, label,
sys_state_vector) -> str:
""" It handles 'is_active' and 'tok' variables in the specification. """
#TODO: here I can add G(tok -> !prev) for the hub abstraction instead of specifying this on LTL level
active_signals = list(
filter(lambda s: s in label, self._is_active_signals))
assert len(active_signals
) <= 1, 'spec cannot contain > 1 is_active as conjunction'
index_of_prev = index_of(lambda s: s in label,
self._sends_prev_signals)
assert index_of_prev is None or self.nof_processes == 1, \
'using prev in the spec is not supported; prev in async hub abstraction works with local properties only'
if not active_signals and not index_of_prev:
return ''
if active_signals:
#: :type: QuantifiedSignal
active = active_signals[0]
proc_index = active.binding_indices[0]
else:
proc_index = self._sends_prev_signals[
index_of_prev].binding_indices[0]
assert self.nof_processes == 1, 'should come here only in the case of async hub'
sends_prev_signal = _filter_by_proc(proc_index,
self._sends_prev_signals)[0]
value_by_sched, _ = build_signals_values(self._sched_signals, label)
if self.nof_processes > 1:
sends_prev_value = self._get_wrapped_prev_expr(
proc_index, sys_state_vector, value_by_sched)
else:
#async_hub
value_by_signal, _ = build_signals_values([sends_prev_signal],
label)
sends_prev_value = value_by_signal[sends_prev_signal]
if not active_signals:
return sends_prev_value
value_by_proc = self._build_label_from_proc_index(proc_index)
value_by_signal = add_dicts(
value_by_sched, value_by_proc,
{sends_prev_signal: sends_prev_value},
{self.state_arg_name: sys_state_vector[proc_index]})
is_active_func_desc = self._get_desc_is_active(proc_index)
func = self.underlying_solver.call_func(is_active_func_desc,
value_by_signal)
return func
def get_architecture_trans_assumption(self, label, sys_state_vector) -> str:
""" It handles 'is_active' and 'tok' variables in the specification. """
#TODO: here I can add G(tok -> !prev) for the hub abstraction instead of specifying this on LTL level
active_signals = list(filter(lambda s: s in label, self._is_active_signals))
assert len(active_signals) <= 1, 'spec cannot contain > 1 is_active as conjunction'
index_of_prev = index_of(lambda s: s in label, self._sends_prev_signals)
assert index_of_prev is None or self.nof_processes == 1, \
'using prev in the spec is not supported; prev in async hub abstraction works with local properties only'
if not active_signals and not index_of_prev:
return ''
if active_signals:
#: :type: QuantifiedSignal
active = active_signals[0]
proc_index = active.binding_indices[0]
else:
proc_index = self._sends_prev_signals[index_of_prev].binding_indices[0]
assert self.nof_processes == 1, 'should come here only in the case of async hub'
sends_prev_signal = _filter_by_proc(proc_index, self._sends_prev_signals)[0]
value_by_sched, _ = build_signals_values(self._sched_signals, label)
if self.nof_processes > 1:
sends_prev_value = self._get_wrapped_prev_expr(proc_index,
sys_state_vector,
value_by_sched)
else:
#async_hub
value_by_signal, _ = build_signals_values([sends_prev_signal], label)
sends_prev_value = value_by_signal[sends_prev_signal]
if not active_signals:
return sends_prev_value
value_by_proc = self._build_label_from_proc_index(proc_index)
value_by_signal = add_dicts(value_by_sched,
value_by_proc,
{sends_prev_signal: sends_prev_value},
{self.state_arg_name:sys_state_vector[proc_index]})
is_active_func_desc = self._get_desc_is_active(proc_index)
func = self.underlying_solver.call_func(is_active_func_desc, value_by_signal)
return func
def get_proc_tau_additional_args(self, proc_label:Label, sys_state_vector, proc_index:int) -> dict:
value_by_signal = dict()
value_by_sched, _ = build_signals_values(self._sched_signals, proc_label)
value_by_signal.update(value_by_sched)
proc_index_label = self._build_label_from_proc_index(proc_index) # assume the spec doesn't have proc_index
value_by_proc, _ = build_signals_values(self._proc_signals, proc_index_label)
value_by_signal.update(value_by_proc)
if self.nof_processes > 1: # for nof_processes=1 sends_prev_expr is not calculated, but an input
sends_prev_signal = _filter_by_proc(proc_index, self._sends_prev_signals)[0]
sends_prev_expr = self._get_wrapped_prev_expr(proc_index, sys_state_vector, value_by_sched)
value_by_signal.update({sends_prev_signal: sends_prev_expr})
return value_by_signal
def get_free_sched_vars(self, label) -> list:
free_signals = set(
filter(lambda sch: sch not in label, self._sched_signals))
_, free_vars = build_signals_values(free_signals, Label())
return free_vars
def _get_free_vars(self, label, impl):
free_vars = set(chain(*[build_signals_values(impl.orig_inputs[proc_index], label)[1]
for proc_index in range(impl.nof_processes)]))
free_vars.update(impl.get_free_sched_vars(label))
return free_vars
def _get_free_vars(self, label, impl):
free_vars = set(
chain(
*[
build_signals_values(impl.orig_inputs[proc_index], label)[1]
for proc_index in range(impl.nof_processes)
]
)
)
free_vars.update(impl.get_free_sched_vars(label))
return free_vars
def get_proc_tau_additional_args(self, proc_label: Label, sys_state_vector,
proc_index: int) -> dict:
value_by_signal = dict()
value_by_sched, _ = build_signals_values(self._sched_signals,
proc_label)
value_by_signal.update(value_by_sched)
proc_index_label = self._build_label_from_proc_index(
proc_index) # assume the spec doesn't have proc_index
value_by_proc, _ = build_signals_values(self._proc_signals,
proc_index_label)
value_by_signal.update(value_by_proc)
if self.nof_processes > 1: # for nof_processes=1 sends_prev_expr is not calculated, but an input
sends_prev_signal = _filter_by_proc(proc_index,
self._sends_prev_signals)[0]
sends_prev_expr = self._get_wrapped_prev_expr(
proc_index, sys_state_vector, value_by_sched)
value_by_signal.update({sends_prev_signal: sends_prev_expr})
return value_by_signal
def _get_next_state_restricted_condition(self, state, only_states, tau_desc: FuncDescription, state_arg_name: str):
input_signals = [var for var, ty in tau_desc.inputs if var != state_arg_name]
values_by_signal, free_vars = build_signals_values(input_signals, Label())
args = {state_arg_name: state}
args.update(values_by_signal)
next_state_expr = self._underlying_solver.call_func(tau_desc, args)
or_clauses = []
for possible_state in only_states:
or_clauses.append(self._underlying_solver.op_eq(next_state_expr, possible_state))
condition = self._underlying_solver.forall_bool(free_vars, self._underlying_solver.op_or(or_clauses))
return condition
def get_architecture_trans_assumption(self, label, sys_state_vector):
# ignore active_i
# add assumption 'G(!(tok & prev))' #TODO: add on LTL level?
proc_state = sys_state_vector[0]
prev_dict, _ = build_signals_values([self._sends_prev_signal], label)
prev_expr = prev_dict[self._sends_prev_signal]
#: :type: FuncDescription
tok_func = self.outvar_desc_by_process[0][self._has_tok_signal]
tok_expr = call_func(tok_func, {self.state_arg_name: proc_state})
tok_and_prev = op_and([tok_expr, prev_expr])
not_and_tok_sends_prev = op_not(tok_and_prev)
return not_and_tok_sends_prev
def _get_next_state_restricted_condition(self, state, only_states,
tau_desc:FuncDescription,
state_arg_name:str):
input_signals = [var for var,ty in tau_desc.inputs if var != state_arg_name]
values_by_signal, free_vars = build_signals_values(input_signals, Label())
args = {state_arg_name: state}
args.update(values_by_signal)
next_state_expr = self._underlying_solver.call_func(tau_desc, args)
or_clauses = []
for possible_state in only_states:
or_clauses.append(self._underlying_solver.op_eq(next_state_expr,
possible_state))
condition = self._underlying_solver.forall_bool(free_vars,
self._underlying_solver.op_or(or_clauses))
return condition
def get_architecture_trans_assumption(self, label, sys_state_vector):
# ignore active_i
# add assumption 'G(!(tok & prev))' #TODO: add on LTL level?
proc_state = sys_state_vector[0]
prev_dict, _ = build_signals_values([self._sends_prev_signal], label)
prev_expr = prev_dict[self._sends_prev_signal]
#: :type: FuncDescription
tok_func = self.outvar_desc_by_process[0][self._has_tok_signal]
tok_expr = call_func(tok_func, {self.state_arg_name: proc_state})
tok_and_prev = op_and([tok_expr, prev_expr])
not_and_tok_sends_prev = op_not(tok_and_prev)
return not_and_tok_sends_prev
def _get_proc_tau_args(self, sys_state_vector, label, proc_index: int, impl) -> dict:
""" Return dict: name->value
free variables (to be enumerated) have ?var_name value.
"""
proc_label = impl.filter_label_by_process(label, proc_index)
glob_tau_args = dict()
proc_state = sys_state_vector[proc_index]
glob_tau_args.update({impl.state_arg_name: proc_state})
# TODO: try to use label instead of proc_label
# should be the same -- alleviate the need of impl.filter_label_by_process
label_vals_dict, _ = build_signals_values(impl.orig_inputs[proc_index], proc_label)
glob_tau_args.update(label_vals_dict)
glob_tau_args.update(impl.get_proc_tau_additional_args(proc_label, sys_state_vector, proc_index))
return glob_tau_args
def _get_proc_tau_args(self, sys_state_vector, label, proc_index:int, impl) -> dict:
""" Return dict: name->value
free variables (to be enumerated) have ?var_name value.
"""
proc_label = impl.filter_label_by_process(label, proc_index)
glob_tau_args = dict()
proc_state = sys_state_vector[proc_index]
glob_tau_args.update({impl.state_arg_name: proc_state})
#TODO: try to use label instead of proc_label
# should be the same -- alleviate the need of impl.filter_label_by_process
label_vals_dict, _ = build_signals_values(impl.orig_inputs[proc_index], proc_label)
glob_tau_args.update(label_vals_dict)
glob_tau_args.update(impl.get_proc_tau_additional_args(proc_label, sys_state_vector, proc_index))
return glob_tau_args
def _get_tok_rings_safety_props(self) -> StrAwareList: # TODO: should be able to specify states!
"""
Return (in SMT form, constraints on non-wrapped tau function):
G(tok & !sends -> Xtok(tau(!prev)))
G(sends -> tok)
G(sends -> X!tok(!prev))
G(Xtok(prev))
G(!tok -> !Xtok(!prev))
"""
smt_lines = StrAwareList()
tau_desc = self.taus_descs[0]
tau_signals = self.orig_inputs[0]
tok_func_desc = self.outvar_desc_by_process[0][self._has_tok_signal]
sends_func_desc = self.outvar_desc_by_process[0][self._sends_signal]
prev_is_false_label = Label({self._sends_prev_signal: False})
prev_is_true_label = Label({self._sends_prev_signal: True})
states = self.states_by_process[0]
for state in states:
state_arg = {self.state_arg_name: state}
has_tok_expr = call_func(tok_func_desc, state_arg)
sends_tok_expr = call_func(sends_func_desc, state_arg)
_, free_vars = build_signals_values(tau_signals, prev_is_false_label)
nprev_arg, _ = build_signals_values(tau_signals, prev_is_false_label)
nprev_state_arg = add_dicts(nprev_arg, state_arg)
prev_arg, _ = build_signals_values(tau_signals, prev_is_true_label)
prev_state_arg = add_dicts(prev_arg, state_arg)
tau_nprev_expr = call_func(tau_desc, nprev_state_arg)
tok_of_tau_nprev_expr = call_func(tok_func_desc, {self.state_arg_name: tau_nprev_expr})
tau_prev_expr = call_func(tau_desc, prev_state_arg)
tok_of_tau_prev_expr = call_func(tok_func_desc, {self.state_arg_name: tau_prev_expr})
#
tok_dont_disappear = forall_bool(free_vars,
op_implies(op_and([has_tok_expr, op_not(sends_tok_expr)]),
tok_of_tau_nprev_expr))
sends_with_token_only = forall_bool(free_vars,
op_implies(sends_tok_expr, has_tok_expr))
sends_means_release = forall_bool(free_vars,
op_implies(sends_tok_expr, op_not(tok_of_tau_nprev_expr)))
sends_prev_means_acquire = forall_bool(free_vars,
tok_of_tau_prev_expr)
no_sends_prev_no_tok_means_no_next_tok = forall_bool(free_vars,
op_implies(op_not(has_tok_expr),
op_not(tok_of_tau_nprev_expr)))
smt_lines += [tok_dont_disappear,
sends_with_token_only,
sends_means_release,
sends_prev_means_acquire,
no_sends_prev_no_tok_means_no_next_tok]
return smt_lines
def get_free_sched_vars(self, label) -> list:
free_signals = set(filter(lambda sch: sch not in label, self._sched_signals))
_, free_vars = build_signals_values(free_signals, Label())
return free_vars
def _get_tok_rings_safety_props(
self) -> StrAwareList: # TODO: should be able to specify states!
"""
Return (in SMT form, constraints on non-wrapped tau function):
G(tok & !sends -> Xtok(tau(!prev)))
G(sends -> tok)
G(sends -> X!tok(!prev))
G(Xtok(prev))
G(!tok -> !Xtok(!prev))
"""
smt_lines = StrAwareList()
tau_desc = self.taus_descs[0]
tau_signals = self.orig_inputs[0]
tok_func_desc = self.outvar_desc_by_process[0][self._has_tok_signal]
sends_func_desc = self.outvar_desc_by_process[0][self._sends_signal]
prev_is_false_label = Label({self._sends_prev_signal: False})
prev_is_true_label = Label({self._sends_prev_signal: True})
states = self.states_by_process[0]
for state in states:
state_arg = {self.state_arg_name: state}
has_tok_expr = call_func(tok_func_desc, state_arg)
sends_tok_expr = call_func(sends_func_desc, state_arg)
_, free_vars = build_signals_values(tau_signals,
prev_is_false_label)
nprev_arg, _ = build_signals_values(tau_signals,
prev_is_false_label)
nprev_state_arg = add_dicts(nprev_arg, state_arg)
prev_arg, _ = build_signals_values(tau_signals, prev_is_true_label)
prev_state_arg = add_dicts(prev_arg, state_arg)
tau_nprev_expr = call_func(tau_desc, nprev_state_arg)
tok_of_tau_nprev_expr = call_func(
tok_func_desc, {self.state_arg_name: tau_nprev_expr})
tau_prev_expr = call_func(tau_desc, prev_state_arg)
tok_of_tau_prev_expr = call_func(
tok_func_desc, {self.state_arg_name: tau_prev_expr})
#
tok_dont_disappear = forall_bool(
free_vars,
op_implies(op_and([has_tok_expr,
op_not(sends_tok_expr)]),
tok_of_tau_nprev_expr))
sends_with_token_only = forall_bool(
free_vars, op_implies(sends_tok_expr, has_tok_expr))
sends_means_release = forall_bool(
free_vars,
op_implies(sends_tok_expr, op_not(tok_of_tau_nprev_expr)))
sends_prev_means_acquire = forall_bool(free_vars,
tok_of_tau_prev_expr)
no_sends_prev_no_tok_means_no_next_tok = forall_bool(
free_vars,
op_implies(op_not(has_tok_expr),
op_not(tok_of_tau_nprev_expr)))
smt_lines += [
tok_dont_disappear, sends_with_token_only, sends_means_release,
sends_prev_means_acquire,
no_sends_prev_no_tok_means_no_next_tok
]
return smt_lines