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Proof step 6 from proof crash-neutral-write-data (previous step)

apebs[n] = mkpeb(aehdr, avhdr, buf0, m, false), apebs0 = apebs, n0 = n4, n2 = n5, n3 = n, aehdr.valid?, avhdr.valid?, n < # apebs, is-aligned(n5, EB_PAGE_SIZE), is-aligned(n4, EB_PAGE_SIZE), ubi-io-inv(apebs), m ≤ n5, n5 + n4 ≤ LEB_SIZE, n1 + n4 ≤ # buf ⊦ ⟨if ubi-io-write-data-pre(n3, n2, n1, n0, buf, apebs) then {fail_or_success#(; ; err); if err = ESUCCESS then apebs[n3] := mkpeb (apebs[n3].echdr, apebs[n3].vidhdr, subarray(apebs[n3].data, 0, n2) + subarray(buf, n1, n0) + mkempbuf(LEB_SIZE - n2 - n0), n2 + n0, apebs[n3].bad) else choose n with (n < n0 ∨ n = 0 ∧ n0 = 0) ∧ is-aligned(n, EB_PAGE_SIZE) in if n ≠ 0 then apebs[n3] := mkpeb (apebs[n3].echdr, apebs[n3].vidhdr, subarray(apebs[n3].data, 0, n2) + subarray(buf, n1, n) + mkempbuf(LEB_SIZE - n2 - n), n2 + n, apebs[n3].bad)} else abort⟩ (apebs0 = apebs)

Heuristic conditional right split applied rule if right

And obtained the following new goals

Rule argument

pos: right 1

Additional information