proposition: Lemma gen_decF (A : clause * annot) : A \in U -> decidable (gen A).
proof: Proof. move => H. exact: decP (stepP H). Qed.
imports: mathcomp.ssreflect.ssreflect mathcomp(all_ssreflect) CompDecModal.libs(edone bcase fset base sltype) CompDecModal.CTL(CTL_def gen_def)