proposition: Lemma used_space_signed_range: forall sp, Ptrofs.min_signed <= WORD_SIZE * used_space sp < Ptrofs.max_signed.
proof: Proof. intros. apply MSS_max_wordsize_signed_range. destruct (space_order sp). split. 1: assumption. apply Z.le_trans with (total_space sp). 1: assumption. apply (proj2 (total_space_tight_range sp)). 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