⊦ r -- sk ∈ st → r ∈ st
r -- sk ∈ st, r ∈ st, ∀ rk1. rk1 = rk ∨ rk1 ∈ st → rk1 .ref ≠ r ⊦ r = jvmref
[[CONCRETESIMPRULES : ()]]