proposition: Lemma cmp_dec: forall a a', {cmp_rel a a'} + {~cmp_rel a a'}.
proof: Proof. intros [? ?] [? ?]. unfold cmp_rel, cmp. simpl. case (Int.lt i1 i); simpl; auto. Qed.
imports: VST.floyd.proofauto CertiGraph.binheap.binary_heap CertiGraph.binheap.binary_heap_model CertiGraph.binheap.binary_heap_Zmodel RelationClasses