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Proof step 1 from proof valid-peb0-write-append (conclusion)

⊦ valid-peb(mkpeb(aehdr, avhdr, buf, m, false)) ∧ m ≤ m0 ∧ m0 + # buf0 = LEB_SIZE ∧ ubi-io-peb-inv(mkpeb(aehdr, avhdr, buf, m, false)) → valid-peb(mkpeb(aehdr, avhdr, subarray(buf, 0, m0) + buf0, m0 + m1, false))

System applied rule normalize

And obtained the following new goals

Proof step 2:
m0 + # buf0 = LEB_SIZE, ubi-io-peb-inv(mkpeb(aehdr, avhdr, buf, m, false)), valid-peb(mkpeb(aehdr, avhdr, buf, m, false)), m ≤ m0 ⊦ valid-peb(mkpeb(aehdr, avhdr, subarray(buf, 0, m0) + buf0, m0 + m1, false))

Proof step 1 from proof valid-peb0-write-append (conclusion)

System applied rule normalize

And obtained the following new goals

Rule argument

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