fact: Definition addresses := @nil val.
imports: CertiGraph.prim.prim_env CertiGraph.lib.find_lemmas CertiGraph.priq.is_empty_lemmas CertiGraph.graph.MathUAdjMatGraph CertiGraph.prim.prim_constants CertiGraph.graph.SpaceUAdjMatGraph2 CertiGraph.prim.prim_spec2