fact: Definition label_key (l: Label): NId := match l with | put_label _ n c k v s s' u => k | get_label _ n c n' k s s' v => k | update_label _ n c n' k v s m s' => k | fault_label _ n _ _ => 0 end.
imports: Coq(FunctionalExtensionality Arith Lia) Coq(Arith.Peano_dec Arith.Compare_dec) Coq(Relations.Relation_Operators) Coq(List) Chapar(Predefs)