fact: Definition alloc_sp (p : ideald alloc_s.1) y m := exists i, i \In id_val p /\ exists l : ptr, y = Val l /\ m = i :+ l :-> v /\ l != null /\ l \notin dom i.
imports: mathcomp(ssreflect ssrbool ssrfun ssrnat eqtype seq) LemmaOverloading(prelude heaps rels hprop domains)