⊦ validreflist(str, vals, ty, st) ↔ (∀ val. val ∈ vals → is_referencevalue(val) ∧ validref(str, val .refval, ty, st))
[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ val ∈ []])], [EXTRATERMS : (st, ty, [], str)]]