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Proof step 4 from proof okclass-int (previous step)

st[r0 -- _type] = typeval(mkclasstype(class1)), r0 -- _type ∈ st, r0 ∈ st ⊦ r0 = jvmref, okclass(refval(r0), class1, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ okclass(val, class1, st) ↔ reftypep(val, st) ∧ (val .refval ≠ jvmref → val .refval -- _type ∈ st ∧ st[val .refval -- _type] = typeval(mkclasstype(class1)))

Rule argument

[crewrite-arg: okclass , F , [st, class1, val] → [st, class1, refval(r0)] ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ r ∈ st → reftypep(refval(r), st)], [CSIMPSEQ : ⊦ refval(r) .refval = r])], [EXTRATERMS : (st, class1, refval(r0))]]