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Proof step 7 from proof crash-neutral-read-data (previous step)

apebs[n6] = mkpeb(aehdr, avhdr, buf1, m, false), buf0 = buf, n = n3, n0 = n4, n1 = n5, n2 = n6, n6 < # apebs, ubi-io-inv(apebs), ubi-io-read-data-pre(n2, n1, n0, n, buf0, apebs), n4 + n3 ≤ # buf, n5 + n3 ≤ LEB_SIZE ⊦ ⟨fail_or_success#(; ; err); bitflips := ?; if err = ESUCCESS then buf0 := copy(apebs[n2].data, n1, buf0, n0, n) else choose buf with # buf = # buf0 ∧ range=(buf, 0, buf0, 0, n0) ∧ range=(buf, n0 + n, buf0, n0 + n, # buf0 - n0 + n) in buf0 := buf⟩ true

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 8:
apebs[n6] = mkpeb(aehdr, avhdr, buf1, m, false), n6 < # apebs, ubi-io-inv(apebs), n4 + n3 ≤ # buf, n5 + n3 ≤ LEB_SIZE ⊦ ⟨fail_or_success#(; ; err); bitflips := ?; if err = ESUCCESS then buf := copy(apebs[n6].data, n5, buf, n4, n3) else choose buf1 with # buf1 = # buf ∧ range=(buf1, 0, buf, 0, n4) ∧ range=(buf1, n4 + n3, buf, n4 + n3, # buf - n4 + n3) in buf := buf1⟩ true

Rule argument

Additional information

Used simplifier rules: ⊦ mkpeb(aehdr, avhdr, buf, m, boolvar).bad ↔ boolvar; (s)%⊦ ubi-io-read-data-pre(n, n0, m0, n1, buf, apebs) ↔ n < # apebs ∧ ¬ apebs[n].bad ∧ n0 + n1 ≤ LEB_SIZE ∧ m0 + n1 ≤ # buf; (s)