Proof step 9 from proof okstore-jvmref (previous step)
_out ∈ st, _mode ∈ st, jvmref ∈ st, r ∈ st, ∀ r. r ≠ jvmref ∧ r ∈ st → r -- _type ∈ st ∧ is_typevalue(st[r -- _type])
⊦
r = jvmref, is_typevalue(st[r -- _type])
Heuristic quantifier closing applied rule all left