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 funassert_initial_core_ext:
forall (ora : OK_ty) (prog: program) ve te V G n,
list_norepet (prog_defs_names prog) ->
match_fdecs (prog_funct prog) G ->
app_pred (funassert (nofunc_tycontext V G) (mkEnviron (filter_genv (globalenv prog)) ve te))
(initial_core_ext ora (Genv.globalenv prog) G n).