basic_model.smv

MODULE main 
VAR 
-- States representing combinations of obligations and permissible actions for 5 actions (a_1 through a_5)
    s : {Oa1Pa1, Oa1Pa2, Oa1Pa3, Oa1Pa4, Oa1Pa5,
         Oa2Pa1, Oa2Pa2, Oa2Pa3, Oa2Pa4, Oa2Pa5,
         Oa3Pa1, Oa3Pa2, Oa3Pa3, Oa3Pa4, Oa3Pa5,
         Oa4Pa1, Oa4Pa2, Oa4Pa3, Oa4Pa4, Oa4Pa5,
         Oa5Pa1, Oa5Pa2, Oa5Pa3, Oa5Pa4, Oa5Pa5};

ASSIGN
    -- Set the initial state 's' to the combination Oa1Pa1
    init(s) := Oa1Pa1;

    -- defines the state transitions for variable 's'
    next(s) :=
        case 
            -- Transition for action a1: Wait until communication is restored (R)
            s = Oa1Pa1 : Oa1Pa2;
            s = Oa1Pa2 : Oa1Pa3;
            s = Oa1Pa3 : Oa1Pa4;
            s = Oa1Pa4 : Oa1Pa5;
            s = Oa1Pa5 : Oa2Pa1;

            -- Transition for action a2: Crash into an empty field (C)
            s = Oa2Pa1 : Oa2Pa2;
            s = Oa2Pa2 : Oa2Pa3;
            s = Oa2Pa3 : Oa2Pa4;
            s = Oa2Pa4 : Oa2Pa5;

            -- Transition for action a3: Collide and damage infrastructure/vehicles (D)
            s = Oa2Pa5 : Oa3Pa1;
            s = Oa3Pa1 : Oa3Pa2;
            s = Oa3Pa2 : Oa3Pa3;
            s = Oa3Pa3 : Oa3Pa4;
            s = Oa3Pa4 : Oa3Pa5;

            -- Transition for action a4: Collide and harm animals (H)
            s = Oa3Pa5 : Oa4Pa1;
            s = Oa4Pa1 : Oa4Pa2;
            s = Oa4Pa2 : Oa4Pa3;
            s = Oa4Pa3 : Oa4Pa4;
            s = Oa4Pa4 : Oa4Pa5;

            -- Transition for action a5: Collide and harm humans (M)
            s = Oa4Pa5 : Oa5Pa1;
            s = Oa5Pa1 : Oa5Pa2;
            s = Oa5Pa2 : Oa5Pa3;
            s = Oa5Pa3 : Oa5Pa4;
            s = Oa5Pa4 : Oa5Pa5;

            -- Loop back from Oa5Pa5 to Oa1Pa1 to complete the cycle
            s = Oa5Pa5 : Oa1Pa1; 
        esac;