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Proof step 4 from proof isobj-rec (previous step)

st[r -- _type] = typeval(mkclasstype(class)), r -- _type ∈ st, r ∈ st, sk0 = sk ∨ sk0 ∈ sks → goodfieldandtype(r, sk0, st), ∀ sk0. sk0 = sk ∨ sk0 ∈ sks → goodfieldandtype(r, sk0, st) ⊦ r = jvmref, goodfieldandtype(r, sk, st) ∧ (sk0 ∈ sks → goodfieldandtype(r, sk0, st))

User applied rule case distinction

And obtained the following new goals

Proof step 3:
st[r -- _type] = typeval(mkclasstype(class)), r -- _type ∈ st, r ∈ st, sk0 = sk ∨ sk0 ∈ sks → goodfieldandtype(r, sk0, st), ∀ sk0. sk0 = sk ∨ sk0 ∈ sks → goodfieldandtype(r, sk0, st) ⊦ goodfieldandtype(r, sk, st), r = jvmref

Rule argument

[CASEDARG : pos: right 2, ()]

Additional information

[[CONCRETESIMPRULES : ()]]