predicate fzn_geost_nonoverlap_k_reif(
    array[int] of var int : x1, 
    array[int] of int     : w1, 
    array[int] of var int : x2, 
    array[int] of int     : w2,
    var bool: b
) = 
    % Non-overlap constraint
    b <-> exists(j in index_set(x1))(
        x1[j] + w1[j] <= x2[j] \/ x2[j] + w2[j] <= x1[j]
    );