fact: Definition union_spec := DECLARE _Union WITH sh: share, g: UFGraph, subsets: pointer_val, x: Z, y: Z PRE [tptr vertex_type, tint, tint] PROP (writable_share sh; vvalid g x; vvalid g y) PARAMS (pointer_val_val subsets; Vint (Int.repr x); Vint (Int.repr y)) GLOBALS () SEP (whole_graph sh g subsets) POST [ Tvoid ] EX g': UFGraph, PROP (uf_union g x y g') LOCAL () SEP (whole_graph sh g' subsets).
imports: CertiGraph.unionfind.env_unionfind_arr CertiGraph.graph.graph_model CertiGraph.graph.UnionFind CertiGraph.msl_application.ArrayGraph CertiGraph.floyd_ext.share VST.floyd.library CertiGraph.unionfind.spatial_array_graph