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dekker.one
1%-----------------------------------------------------------------------------%
2% Requires that 'y' occurs in the array of set 'x'.
3%-----------------------------------------------------------------------------%
4
5predicate fzn_member_set_reif(array[int] of var set of int: x, var set of int: y, var bool: b) =
6 b <-> exists(i in index_set(x)) ( x[i] == y );