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Proof step 1 from proof refsize-cons-append (conclusion)

⊦ st[n] = mkblock(x, lax, m) ∧ n ∈ st ∧ ¬ @(m0, m1) ∈ lax ∧ refsize-cons(st, as) ∧ as ⊆ dom nodes(st) → refsize-cons(st[n, mkblock(x + a ', lax + @(m0, m1) ', m + m1)], as ++ @(n, m0, m1))

System applied rule normalize

And obtained the following new goals

Proof step 2:
st[n] = mkblock(x, lax, m), refsize-cons(st, as), n ∈ st, as ⊆ dom nodes(st) ⊦ refsize-cons(st[n, mkblock(x + a ', lax + @(m0, m1) ', m + m1)], as ++ @(n, m0, m1)), @(m0, m1) ∈ lax

Proof step 1 from proof refsize-cons-append (conclusion)

System applied rule normalize

And obtained the following new goals

Rule argument

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