Definition main_params (ge: genv) start : Prop :=
  exists b, exists func,
    Genv.find_symbol ge start = Some b /\
        Genv.find_funct ge (Vptr b Ptrofs.zero) = Some (Internal func) /\
        func.(fn_params) = nil.

Lemma core_inflate_initial_mem: forall (m: mem) (prog: program) (G: funspecs) (n: nat) (INIT: Genv.init_mem prog = Some m), match_fdecs (prog_funct prog) G -> list_norepet (prog_defs_names prog) -> core (inflate_initial_mem m (initial_core (Genv.globalenv prog) G n)) = initial_core (Genv.globalenv prog) G n.