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Proof step 1 from proof Inv-first-inner-init-b (conclusion)

y ≤ x, x = A[i + 1], y = A[i] ⊦ i + 1 < # A ∧ Inv-main(A, A0, i) → Inv-first-inner(A, A, x, y, i, i)

System applied rule normalize

And obtained the following new goals

Proof step 2:
x = A[i + 1], y = A[i], i + 1 < # A, Inv-main(A, A0, i), y ≤ x ⊦ Inv-first-inner(A, A, x, y, i, i)

Rule argument

Additional information