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Proof step 15 from proof isobj-update-01 (previous step)

st[r -- _type] = typeval(mkclasstype(class)), r -- _type ∈ st, r ∈ st ⊦ r = jvmref, r = r0, (∀ sk. sk ∈ instfields(class) → goodfieldandtype(r, sk, update(r0, fis, st))) ↔ (∀ sk. sk ∈ instfields(class) → goodfieldandtype(r, sk, st))

User applied rule case distinction

And obtained the following new goals

Rule argument

[CASEDARG : pos: right 3, ()]

Additional information

[[CONCRETESIMPRULES : ()]]