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Proof step 3 from proof valid-peb0-write-append (previous step)

m0 + # buf0 = LEB_SIZE, aehdr.valid?, ubi-io-peb-inv(mkpeb(aehdr, avidhdr(v, m2, m3, m4, m5), buf, m, false)), m ≤ m0, m4 ≠ 0 → m4 ≤ datasize(buf) ∧ m5 = checksum(buf, m4) ⊦ ∃ v0, m6, m7, m8, m9. avidhdr(v, m2, m3, m4, m5) = avidhdr(v0, m6, m7, m8, m9) ∧ (m8 ≠ 0 → m8 ≤ datasize(subarray(buf, 0, m0) + buf0) ∧ m9 = checksum(subarray(buf, 0, m0) + buf0, m8))

User applied rule exists right

And obtained the following new goals

Proof step 4:
m0 + # buf0 = LEB_SIZE, aehdr.valid?, ubi-io-peb-inv(mkpeb(aehdr, avidhdr(v, m2, m3, m4, m5), buf, m, false)), m ≤ m0, m4 ≠ 0 → m4 ≤ datasize(buf) ∧ m5 = checksum(buf, m4) ⊦ avidhdr(v, m2, m3, m4, m5) = avidhdr(v, m2, m3, m4, m5) ∧ (m4 ≠ 0 → m4 ≤ datasize(subarray(buf, 0, m0) + buf0) ∧ m5 = checksum(subarray(buf, 0, m0) + buf0, m4))

Rule argument

pos: right 1 terms: v, m2, m3, m4, m5 abort: F discard: T computed: T

Additional information

Used terms: v, m2, m3, m4, m5