not_in.fzn

var 2..2: v :: output_var = 2;
array [1..2] of var 1..3: values :: output_array([1..2]);
constraint int_eq(values[1], 1);
constraint int_eq(values[2], 3);
constraint int_ne(values[1], 2);
constraint int_ne(values[2], 2);
solve satisfy;