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

Lemma stash_path_combined_rel_Rd_undef : forall (id id' : block_id) (s : state) (p_new : path), well_formed s -> undef id s -> undef id ((get_pre_wb_st id' Read s (calc_path id' s) p_new)).