include "fzn_diffn_nonstrict.mzn";
include "fzn_diffn_nonstrict_reif.mzn";

/** @group globals.packing
  Constrains rectangles \p i, given by their origins (\a x[\p i], \a y[\p i])
  and sizes (\a dx[\p i], \a dy[\p i]), to be non-overlapping. Zero-width
  rectangles can be packed anywhere.
*/
predicate diffn_nonstrict(array[int] of var int: x,
                          array[int] of var int: y,
                          array[int] of var int: dx,
                          array[int] of var int: dy) =
    assert(
        index_set(x) = index_set(y)  /\
        index_set(x) = index_set(dx) /\
        index_set(x) = index_set(dy),
        "diffn: index set mismatch",
        fzn_diffn_nonstrict(x,y,dx,dy)
    );