(* Classical Higher-order Logic -- batteries included *) use_thys ["Library", "List_Cset", "List_Prefix", "List_lexord", "Sublist_Order", "Product_Lattice", "Code_Char_chr", "Code_Char_ord", "Code_Integer", "Efficient_Nat"(*, "Code_Prolog"*), "Code_Real_Approx_By_Float" ];