Definition all_initializers_aligned (prog: program) :=
  forallb (fun idv => andb (initializers_aligned 0 (gvar_init (snd idv)))
                                 (Zlt_bool (init_data_list_size (gvar_init (snd idv))) Ptrofs.modulus))
                      (prog_vars prog) = true.

Lemma forallb_rev: forall {A} f (vl: list A), forallb f (rev vl) = forallb f vl.