Definition on_path b o p :=
    In b (concat (lookup_path_oram o p)).

Lemma stash_path_combined_rel_Wr_undef : forall (id id' : block_id) (v : nat) (s : state) (p_new : path), id <> id' -> well_formed s -> undef id' s -> undef id' ((get_pre_wb_st id (Write v) s (calc_path id s) p_new)).