module main {
    var x : integer;

    // Define a procedure for the process operation
    procedure process() {
        for (i : integer = 1 to 10) {
            atomic {
                var temp : integer;
                temp = x;
                temp = temp + 1;
                x = temp;
            }
        }
    }

    init {
        x = 0;
    }

    // Parallel execution of processes
    next {
        call process(); // Simulate P1
        call process(); // Simulate P2
        call process(); // Simulate P3
    }

    // Safety property to check if x can be 2
    invariant check_x_is_2 : (x == 2);
}

control {
    check;
    print_results;
}
