fact: Definition cmp (x y: heap_item) := negb (Int.lt (fst x) (fst y)).
imports: VST.floyd.proofauto Coq.ZArith.ZArith CertiGraph.floyd_ext.closed_lemmas CertiGraph.kruskal.kruskal_edgelist RelationClasses CertiGraph.binheap.binary_heap_model CertiGraph.binheap.binary_heap_Zmodel