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Proof step 1 from proof remove-refsize0-subset-refed (conclusion)

⊦ refsize-cons(st, as) ∧ as ⊆ dom nodes(st) ∧ valid-adrs(as) → nodes(st) | as ⊆ nodes(remove-refsize0(st))

System applied rule normalize

And obtained the following new goals

Rule argument

Additional information