Exemple #1
0
        public void parseTemporalOperator(Property property, out StateFormula state1, out StateFormula state2, ref bool is_ctl, out int temp)
        {
            Property property1, property2;

            if (property.GetType() == typeof(Next))
            {
                property1 = ((Next)property).Operand;

                parseStateFormula(property1, out state1, ref is_ctl);
                state2 = new SError();
                temp   = 0;
            }
            else if (property.GetType() == typeof(Until))
            {
                property1 = ((Until)property).LeftOperand;
                property2 = ((Until)property).RightOperand;

                parseStateFormula(property1, out state1, ref is_ctl);
                parseStateFormula(property2, out state2, ref is_ctl);

                temp = 1;
            }
            else if (property.GetType() == typeof(Eventually))
            {
                property1 = ((Eventually)property).Operand;

                parseStateFormula(property1, out state1, ref is_ctl);
                state2 = new SError();
                temp   = 2;
            }
            else if (property.GetType() == typeof(Always))
            {
                property1 = ((Always)property).Operand;

                parseStateFormula(property1, out state1, ref is_ctl);
                state2 = new SError();
                temp   = 3;
            }
            else if (property.GetType() == typeof(WeakUntil))
            {
                property1 = ((WeakUntil)property).LeftOperand;
                property2 = ((WeakUntil)property).RightOperand;

                parseStateFormula(property1, out state1, ref is_ctl);
                parseStateFormula(property2, out state2, ref is_ctl);

                temp = 4;
            }
            else
            {
                state1 = new SError();
                state2 = new SError();

                temp   = -1;
                is_ctl = false;
            }
        }
Exemple #2
0
        /*
         * Uses the factory which we created at the very beginning to
         * do the actual modelchecking
         * For each state formula it gets the satisfaction set
         * by using the state forumla class' method
         * Then it checks whether the initial state is in that set or not
         */
        public void ModelChecker <T>(TransitionSystem <T> transition_system, LinkedList <T> states, StateFormula state_formula, out bool isSatiesfied, ref Pre_Compute_Factory <T> factory)
            where T : struct, Modest.Exploration.IState <T>
        {
            HashSet <T> sat;

            state_formula.isSatiesfied <T>(transition_system, states, out sat, ref factory);

            T initialState;

            transition_system.GetInitialState(out initialState);

            if (sat.Contains(initialState))
            {
                isSatiesfied = true;
            }
            else
            {
                isSatiesfied = false;
            }
        }
Exemple #3
0
        public void AnalyzeTransitionSystem <T>(TransitionSystem <T> transitionSystem, ModelProperty[] properties) // called from Program.cs
            where T : struct, Modest.Exploration.IState <T>
        {                                                                                                          /*
                                                                                                                    *          // Implement your transition system analysis procedures here
                                                                                                                    *          // For illustration, let's count the immediate successors of the initial state:
                                                                                                                    *          var successors = new HashSet<T>(); // the state types implement proper .GetHashCode and .Equals methods based on structural equality
                                                                                                                    *          T initialState, successorState;
                                                                                                                    *          transitionSystem.GetInitialState(out initialState);
                                                                                                                    *          foreach(var transition in transitionSystem.GetTransitions(ref initialState))
                                                                                                                    *          {
                                                                                                                    *                  transitionSystem.GetTargetState(ref initialState, transition, out successorState);
                                                                                                                    *                  successors.Add(successorState);
                                                                                                                    *                  // We could evaluate properties using transitionSystem.HasAtomicProposition(ref successorState, ...) here;
                                                                                                                    *                  // also see the class diagram for properties (file Properties-Classes.png).
                                                                                                                    *          }
                                                                                                                    *          Console.WriteLine("The initial state has " + successors.Count.ToString(CI.InvariantCulture) + " distinct immediate successor state" + (successors.Count == 1 ? string.Empty : "s") + ".");
                                                                                                                    */
            // Write Tests into Files
            //var testAnalyzer = new TestAnalyzer();
            //testAnalyzer.writeTestFiles<T>(transitionSystem, properties);

            T initialState;

            transitionSystem.GetInitialState(out initialState);

            var newStates = new Queue <T>();

            newStates.Enqueue(initialState);

            /*
             * Use this factory to pre_compute everything
             * See class implementation for more information
             */

            Pre_Compute_Factory <T> factory = new Pre_Compute_Factory <T>(transitionSystem);

            HashSet <T> states = factory.getStates();

            Console.WriteLine("States: " + factory.number_states + "\n");


            if (factory.terminal_encountered)
            {
                Console.WriteLine("Error: deadlocks detected\n");
                return;
            }

            // Transform properties in State_Formulas;
            var state_formulas = new Dictionary <String, StateFormula>();

            foreach (var model_property in properties)
            {
                Property     property         = model_property.Property;
                String       name             = model_property.Name;
                StateFormula complete_formula = new SError();
                bool         is_ctl           = true;


                parseStateFormula(property, out complete_formula, ref is_ctl);


                if (!is_ctl)
                {
                    Console.WriteLine(name + ": not supported \n");
                }
                else
                {
                    state_formulas.Add(name, complete_formula);
                }
            }

            //Transform into ENF
            var state_ENF = new Dictionary <String, StateFormula>();

            foreach (var key_formula in state_formulas)
            {
                String       name        = key_formula.Key;
                StateFormula enf_formula = key_formula.Value.existentialNormalForm();


                state_ENF.Add(key_formula.Key, enf_formula);
            }


            // Now do the model checking
            foreach (var entry in state_ENF)
            {
                String       name          = entry.Key;
                StateFormula state_formula = entry.Value;

                bool           isSatisfied;
                LinkedList <T> linked_states = new LinkedList <T>();
                foreach (var entry_state in states)
                {
                    linked_states.AddLast(entry_state);
                }



                ModelChecker <T>(transitionSystem, linked_states, state_formula, out isSatisfied, ref factory);

                if (isSatisfied)
                {
                    Console.WriteLine(name + ": true \n");
                }
                else
                {
                    Console.WriteLine(name + ": false \n");
                }
            }


            Environment.Exit(0);
        }
Exemple #4
0
        // This function does not get called anymore
        // But im still leaving it here in case it is needed later

        /*
         * public void traverseTree<T>(TransitionSystem<T> transitionSystem, ref HashSet<T> already_expanded, ref Queue<T> newStates, ref T state_a, ref bool terminalStatesEncountered)
         *  where T : struct, Modest.Exploration.IState<T>
         * {
         *
         *
         *  int newSize = newStates.Count;
         *
         *
         *
         *  while (newSize > 0)
         *  {
         *      //Console.WriteLine(newSize);
         *      //Console.WriteLine(newSize);
         *      int count = 0;
         *      var state = newStates.Dequeue();
         *
         *      //if (!(oldStates.Contains(state)))
         *      //already_expanded.Add(state);
         *      T successor;
         *
         *      foreach (var transition in transitionSystem.GetTransitions(ref state))
         *      {
         *          transitionSystem.GetTargetState(ref state, transition, out successor);
         *
         *          if (already_expanded.Add(successor))
         *          {
         *              newStates.Enqueue(successor);
         *              //newestStates.Add(successor);
         *          }
         *
         *          count++;
         *      }
         *
         *      newSize = newStates.Count;
         *
         *      // If no transition has been encountered for this state it was terminal
         *      if (count == 0)
         *          terminalStatesEncountered = true;
         *  }
         *
         *
         * }
         */


        /*
         * Parses the property into our own tree structure
         */

        public void parseStateFormula(Property property, out StateFormula result, ref bool is_ctl)
        {
            StateFormula state1, state2;
            Property     property1, property2;
            int          temp;


            if (property.GetType() == typeof(True))
            {
                result = new SBoolean(true);
            }
            else if (property.GetType() == typeof(False))
            {
                result = new SBoolean(false);
            }
            else if (property.GetType() == typeof(AtomicProposition))
            {
                result = new SAtomic((AtomicProposition)property);
            }
            else if (property.GetType() == typeof(And))
            {
                property1 = ((And)property).LeftOperand;
                property2 = ((And)property).RightOperand;

                parseStateFormula(property1, out state1, ref is_ctl);
                parseStateFormula(property2, out state2, ref is_ctl);

                result = new SAnd(state1, state2);
            }
            else if (property.GetType() == typeof(Or))
            {
                property1 = ((Or)property).LeftOperand;
                property2 = ((Or)property).RightOperand;

                parseStateFormula(property1, out state1, ref is_ctl);
                parseStateFormula(property2, out state2, ref is_ctl);

                result = new SOr(state1, state2);
            }
            else if (property.GetType() == typeof(Not))
            {
                property1 = ((Not)property).Operand;

                parseStateFormula(property1, out state1, ref is_ctl);

                result = new SNot(state1);
            }
            else if (property.GetType() == typeof(Exists))
            {
                property1 = ((Exists)property).Operand;
                parseTemporalOperator(property1, out state1, out state2, ref is_ctl, out temp);

                switch (temp)
                {
                case 0:
                    result = new SENext(state1);
                    break;

                case 1:
                    result = new SEUntil(state1, state2);
                    break;

                case 2:
                    result = new SEFinally(state1);
                    break;

                case 3:
                    result = new SEAlways(state1);
                    break;

                case 4:
                    result = new SEWeakUntil(state1, state2);
                    break;

                default:
                    result = new SError();
                    is_ctl = false;
                    break;
                }
            }
            else if (property.GetType() == typeof(ForAll))
            {
                property1 = ((ForAll)property).Operand;
                parseTemporalOperator(property1, out state1, out state2, ref is_ctl, out temp);

                switch (temp)
                {
                case 0:
                    result = new SANext(state1);
                    break;

                case 1:
                    result = new SAUntil(state1, state2);
                    break;

                case 2:
                    result = new SAFinally(state1);
                    break;

                case 3:
                    result = new SAAlways(state1);
                    break;

                case 4:
                    result = new SAWeakUntil(state1, state2);
                    break;

                default:
                    result = new SError();
                    is_ctl = false;
                    break;
                }
            }
            else
            {
                is_ctl = false;
                result = new SError();
            }
        }