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Proof step 16 from proof crash-neutral-write-echdr (previous step)

apebs[n] = mkpeb(empty, avhdr, buf, m, false), apebs0 = apebs, aehdr0.valid?, n < # apebs, ubi-io-inv(apebs) ⊦ ∃ aehdr. ¬ aehdr.valid? ∧ ⟨apebs[n].echdr := aehdr⟩ (apebs0 = apebs)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 17:
apebs[n] = mkpeb(empty, avhdr, buf, m, false), aehdr0.valid?, n < # apebs, ubi-io-inv(apebs) ⊦ ∃ aehdr. ¬ aehdr.valid? ∧ ⟨apebs1 := apebs[n, apebs[n].echdr:= aehdr]⟩ (apebs = apebs1)

Proof step 16 from proof crash-neutral-write-echdr (previous step)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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