include "tree.mzn";
include "subgraph.mzn";  

predicate fzn_path_reif(array[int] of $$N: from, array[int] of $$N: to,
                        var $$N: s, var $$N: t, array[$$N] of var bool: ns, array[int] of var bool: es,
                        var bool: b) =
  abort("Reified path constraint is not supported");

%-----------------------------------------------------------------------------%