on-restart-benchmarks/share/minizinc/std/fzn_sum_set.mzn

predicate fzn_sum_set(array[int] of int: vs, array[int] of int: ws,
                      var set of int: x, var int: s) =
    s == sum(j in index_set(vs)) ( bool2int(vs[j] in x) * ws[j] );