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Proof step 2 from proof validsubset-addobj-02 (previous step)

⊦ newref(r, st) ∧ class∃(str, class) ∧ fis .keys = instfields(class) ∧ validfieldinits(fis, st) ∧ ¬ junkrefs(str, fis .vals, st) ∧ ¬ is_abstract(class) → valid⊆(str, st, addobj(r, class, fis, st))

Lemma validsubset-addobj-01