95 lines
3.2 KiB
Python
95 lines
3.2 KiB
Python
"""
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SMT-based Model Checking Module for RS with Context Automaton
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"""
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from z3 import *
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from time import time
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from sys import stdout
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import resource
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from smt.smt_checker_rs import SmtCheckerRS
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class SmtCheckerRSNA(SmtCheckerRS):
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"""SMT-based Model Checking for Reaction Systems with Network of Automata"""
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def __init__(self, reaction_system_with_netaut):
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self.rs = reaction_system_with_netaut.rs
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self.canet = reaction_system_with_netaut.cas
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self.number_of_automata = self.canet.number_of_automata
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self.v = []
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self.v_ctx = []
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self.v_canet_states = []
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self.v_canet_actions = []
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self.next_level_to_encode = 0
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self.solver = Solver()
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self.verification_time = None
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def prepare_context_controller_variables(self):
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"""Encodes all the state variables"""
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level = self.next_level_to_encode
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ca_states = []
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for ca_id in range(self.number_of_automata):
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ca_states.append(Int("CA"+str(level)+"_a"+str(ca_id)+"_state"))
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self.v_canet_states.append(ca_states)
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# We do not encode actions when there are no transitions needed.
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if level > 0:
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ca_actions = []
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for ca in self.canet.automata:
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for act_id in range(ca.number_of_actions):
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ca_actions.append(Bool("CA"+str(level-1)+"_a"+str(self.canet.automata.index(ca))+"_act"+str(act_id)))
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self.v_canet_actions.append(ca_actions)
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def enc_context_controller_init_state(self, level):
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"""Encodes the initial state for the network of automata"""
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canet_init_state_enc = True
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for ca_idx in range(self.number_of_automata):
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ca_init_state_enc = self.v_canet_states[level][ca_idx] == self.canet.automata[ca_idx].get_init_state_id()
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canet_init_state_enc = simplify(And(canet_init_state_enc, ca_init_state_enc))
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return canet_init_state_enc
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def enc_transition_relation(self, level):
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return simplify(And(self.enc_rs_trans(level), self.enc_automaton_trans(level)))
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def enc_automaton_trans(self, level):
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"""Encodes the transition relation for the context automaton"""
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enc_trans = True
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prod_context = self.canet.prod_entities
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never_produced_context = self.rs.set_of_bgset_ids - prod_context
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# producible entities:
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for ent in prod_context:
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actions_producing_ent = self.canet.get_actions_producing_entity(ent)
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for act in actions_producing_ent:
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automata_with_act = self.canet.get_automata_with_action(act)
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for aut_id in automata_with_act:
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aut = self.canet.automata[aut_id]
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# entities that are never produced:
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return enc_trans
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def check_reachability(self, state, print_witness=True, print_time=True, print_mem=True):
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self.prepare_all_variables()
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self.solver.add(self.enc_init_state(0))
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current_level = 0
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self.prepare_all_variables()
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self.prepare_all_variables()
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self.prepare_all_variables()
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self.prepare_all_variables()
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print(self.enc_automaton_trans(0))
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