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Proof step 15 from proof addobj-union (previous step)

newref(r, st0), newref(r, st) ⊦ r = jvmref, (addobj(r, class, fis, st) ∪ st0)[r -- sk] = (addobj(r, class, fis, st ∪ st0)[r -- sk])

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

[crewrite-arg: add-notin , F , [sk, st, fis, class, r] → [sk, st ∪ st0, fis, class, r] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (sk, st ∪ st0, fis, class, r)]]