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Proof step 7 from proof inv-read-echdr (previous step)

apebs[n] = mkpeb(aehdr0, avhdr, buf, m, false), n < # apebs, ubi-io-inv(apebs) ⊦ ⟪fail_or_success#(; ; err); bitflips := ?; if err = ESUCCESS then aehdr := apebs[n].echdr else aehdr := ?⟫ true

Heuristic weak unfold applied rule call right

And obtained the following new goals

Proof step 8:
apebs[n] = mkpeb(aehdr0, avhdr, buf, m, false), n < # apebs, ubi-io-inv(apebs) ⊦ ⟪choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0; bitflips := ?; if err = ESUCCESS then aehdr := apebs[n].echdr else aehdr := ?⟫ true

Rule argument

pos: right 1

Additional information

Used simplifier rules: fail_or_success#(; ; ERR) {choose ERR0 with ⌊ERR0⌋ ∨ ERR0 = ESUCCESS in ERR := ERR0};