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Proof step 4 from proof validref-put (previous step)

is_obj(r, st), oktype(val, ty, st) ⊦ mkfs(class, ty, fieldvar) ' = _length, ty = void_type, is_array(r, st[r1 -- mkfs(class, ty, fieldvar) ', val]), is_obj(r, st[r1 -- mkfs(class, ty, fieldvar) ', val])

User applied rule insert lemma

And obtained the following new goals

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

Rule argument

[LEMMAARG : isobj-put-02, [r, st, val, ty, r1, class, fieldvar] → [r, st, val, ty, r1, class, fieldvar]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (r, st, val, ty, r1, class, fieldvar)]]