proposition: Lemma hold_eval_FF : forall k, hold k (eval_FF k) <-> False.
proof: Proof. destruct k ; simpl. tauto. unfold Is_true. intuition congruence. Qed.
imports: Cdcl.PatriciaR Cdcl.KeyInt Cdcl.ReifClasses Cdcl.Lib Bool Setoid ZifyBool ZArith Uint63 Lia List Cdcl.Syntax Cdcl.Clause