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Proof step 5 from proof inv-markbad (previous step)

apebs[n] = mkpeb(aehdr, avhdr, buf, m, false), n < # apebs, ubi-io-inv(apebs) ⊦ ⟪if ubi-io-markbad-pre(n, apebs) then {fail_or_success#(; ; err); if err = ESUCCESS then apebs[n].bad := true} else abort⟫ ubi-io-inv(apebs)

Heuristic conditional right split applied rule if right

And obtained the following new goals

Rule argument

pos: right 1

Additional information