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Proof step 15 from proof isobj-addclass (previous step)

st[r -- _type] = typeval(mkclasstype(class)), sk ∈ sks, r -- _type ∈ st, r ∈ st, goodfieldandtype(r, sk, addclass(class0, fis, st)) ⊦ r = jvmref, class = class0, goodfieldandtype(r, sk, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ goodfieldandtype(r, sk, st) ↔ is_fskey(sk) ∧ r -- sk ∈ st ∧ okval(st[r -- sk], sk .fs .type)
Proof step 14:
st[r -- _type] = typeval(mkclasstype(class)), sk ∈ sks, r -- _type ∈ st, r ∈ st, is_fskey(sk) ∧ r -- sk ∈ addclass(class0, fis, st) ∧ okval(addclass(class0, fis, st)[r -- sk], sk .fs .type) ⊦ r = jvmref, class = class0, goodfieldandtype(r, sk, st)

Rule argument

[speclemmaarg: , goodfieldandtype(r, sk, st) ↔ is_fskey(sk) ∧ r -- sk ∈ st ∧ okval(st[r -- sk], sk .fs .type) ,[st, sk, r] → [addclass(class0, fis, st), sk, r] ,F ,okfuns , ,good-field-def ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (addclass(class0, fis, st), sk, r)]]