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Proof step 4 from proof isobj-put-02 (previous step)

st[r -- _type] = typeval(mkclasstype(class0)), r ∈ st, okval(val, ty), is_obj(r, class0, st), r -- _type ∈ st ⊦ r = jvmref, ty = void_type, is_obj(r, class0, st[r1 -- mkfs(class, ty, fieldvar) ', val])

User applied rule insert lemma

And obtained the following new goals

Proof step 3:
⊦ is_obj(r, class0, st) ∧ oktype(val, ty, st) ∧ ty ≠ void_type → is_obj(r, class0, st[r1 -- mkfs(class, ty, fieldvar) ', val])

Rule argument

[LEMMAARG : isobj-put-03, [r, class0, st, val, ty, r1, class, fieldvar] → [r, class0, st, val, ty, r1, class, fieldvar]]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ oktype(val, ty, st) ↔ okval(val, ty)])], [EXTRATERMS : (r, class0, st, val, ty, r1, class, fieldvar)]]