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Proof step 10 from proof crash-neutral-read-echdr (previous step)

apebs[n] = mkpeb(aehdr0, avhdr, buf, m, false), n < # apebs, ubi-io-inv(apebs) ⊦ ∃ err0. (⌊err0⌋ ∨ err0 = ESUCCESS) ∧ ⟨err := err0; bitflips := ?; if err = ESUCCESS then aehdr := apebs[n].echdr else aehdr := ?⟩ true

User applied rule exists right

And obtained the following new goals

Proof step 11:
apebs[n] = mkpeb(aehdr0, avhdr, buf, m, false), n < # apebs, ubi-io-inv(apebs) ⊦ (⌊EIO⌋ ∨ EIO = ESUCCESS) ∧ ⟨err := EIO; bitflips := ?; if err = ESUCCESS then aehdr := apebs[n].echdr else aehdr := ?⟩ true

Rule argument

pos: right 1 terms: EIO abort: F discard: T computed: F

Additional information

Used terms: EIO