How to select array of integers in UPPAAL?

Question

I am using uppaal for a class and I would like to create array of integers within range, using select statement.

For background, I am modelling a modified game of nim, with 3 players and 3 heaps, where a player can either pick up to 3 matches from a single heap, or pick the same number of matches from ALL the heaps (Assuming there is enough matches left in all of them.)

So far I have apparently working (according to some basic queries for the verifier) nim game with 3 players, taking matches from a single heap, but I need to extend the players to be able to take from all the heaps and I would prefer not to hardcode variables like heap1Taken, heap1TakenAmount, heap2Taken, heap2TakenAmount etc. :-)

score 0 · Accepted Answer · answered Jul 21 '16 at 15:31

I ended up creating an array int[0, MAX] beru[3]; and two functions, set_beru and beru_init.

void set_beru(int[0, MAX]& beru[3], int[0, 2] index, int[1, MAX] value){
    for (i : int[0, 2]){
        if (i == index){
            beru[i] = value;
        } else {
            beru[i] = 0;
        }
    }
}

void beru_init(int[0, MAX]& beru[3], int[1, MAX] init_value){
    for (i : int[0, 2]){
        beru[i] = init_value;
    }
}

A player of the game then has two possible transitions from ready_to_play to playing, one of them selecting a heap index and an amount, then calling set_beru, the other one selecting an amount and calling beru_init. Both o them have the guards that make sure the move is legal of course.

When a player is in the playing state, he signals on a channel and the game board updates the heaps using the beru array. This allows the players to play according to the full set of rules.

How to select array of integers in UPPAAL?

1 Answers1