fact: Parameter AssignablePivotTargets: Program -> Heap.t -> Location -> (LocSet.t * LocSet.t) -> LocSet.t.
imports: Coq(List) JML(Stack) Coq(ListSet) Coq(Bool) Coq(ZArith) Coq(Relation_Operators) JML(ListHelpers) Coq(Classical)