proposition: Lemma signed_range_repable_signed: forall z, Ptrofs.min_signed <= z <= Ptrofs.max_signed <-> range_signed z.
proof: Proof. intros. unfold range_signed. replace Ptrofs.max_signed with (if Archi.ptr64 then Int64.max_signed else Int.max_signed) by (vm_compute; reflexivity). replace Ptrofs.min_signed with (if Archi.ptr64 then Int64.min_signed else Int.min_signed) by (vm_compute; reflexivity). reflexivity. Qed.
imports: Coq.ZArith.ZArith Coq.Program.Basics Coq.micromega.Lia compcert.lib.Integers compcert.common.Values VST.veric.base VST.veric.Clight_lemmas VST.veric.val_lemmas VST.veric.shares VST.msl.seplog VST.msl.shares VST.zlist.sublist VST.floyd.coqlib3 VST.floyd.functional_base VST.floyd.data_at_rec_lemmas VST.zlist.list_solver CertiGraph.lib.EquivDec_ext CertiGraph.lib.List_ext CertiGraph.graph.graph_model CertiGraph.graph.graph_gen