⊦ ¬ jvmref ∈ st .refs → (st ∪ st0)[_mode] = st0[_mode]
¬ ¬ jvmref ∈ st .refs ⊦ (st ∪ st0)[_mode] = st0[_mode], jvmref ∈ st
[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st0, st)]]