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Proof step 86 from proof refine-write-vidhdr (previous step)

# buf2 = EB_PAGE_SIZE, pebs[m2] = mkpeb(buf1, EB_PAGE_SIZE, false), apebs[m2] = mkpeb(aehdr, empty, buf0, m1, false), avhdr = avidhdr(v, m5, m0, m3, m4), m = m2, aehdr.valid?, m2 < # apebs, m2 < # pebs, abs(pebs, apebs), abs-peb(mkpeb(buf1, EB_PAGE_SIZE, false), mkpeb(aehdr, empty, buf0, m1, false)), mtd-cons(pebs), ubi-io-inv(apebs), ⌊err1⌋ ⊦ ⟨if ubi-io-write-vidhdr-pre(m, avhdr, apebs) then {fail_or_success#(; ; err); if err = ESUCCESS then apebs[m].vidhdr := avhdr else choose avhdr with ¬ avhdr.valid? in apebs[m].vidhdr := avhdr} else abort⟩ (abs(pebs, apebs) ∧ err1 = err)

Heuristic conditional right split applied rule if right

And obtained the following new goals

Rule argument

pos: right 1

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