Definition semax_equiv {CS: compspecs} {Espec: OracleKind} c1 c2: Prop := forall Delta P Q, semax Delta P c1 Q <-> semax Delta P c2 Q.

Lemma nocontinue_ls_spec': forall sl n, nocontinue_ls sl = true -> nocontinue (seq_of_labeled_statement (select_switch n sl)) = true.