⊦ r ∈ addobj(r0, class1, fis, st) ↔ r = r0 ∨ r ∈ st
⊦ r ≠ jvmref ∧ r ≠ r0 ∧ ¬ r ∈ st ↔ r ≠ r0 ∧ newref(r, st)
[[CONCRETESIMPRULES : ()]]