⊦ ¬ newref(jvmref, st)
⊦ newref(r, st) ↔ r ≠ jvmref ∧ (∀ rk. rk ∈ st → rk .ref ≠ r)
[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ rk ∈ ∅])]]