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Proof step 67 from proof refine-write-echdr (previous step)

# buf2 = EB_PAGE_SIZE, apebs[m2] = mkpeb(empty, avhdr, buf0, m1, false), pebs[m2] = mkpeb(buf1, 0, false), m2 < # pebs, m2 < # apebs, abs(pebs, apebs), abs-peb(mkpeb(buf1, 0, false), mkpeb(empty, avhdr, buf0, m1, false)), is-encoded(echdr(m3), buf2), mtd-cons(pebs), ubi-io-inv(apebs), ⌊err0⌋ ⊦ ⟨aubi_io_write_echdr#(m2, aechdr(m3); apebs; err1)⟩ (abs(pebs, apebs) ∧ err0 = err1)

Heuristic nonrecursive calls applied rule call right

And obtained the following new goals

Proof step 68:
# buf2 = EB_PAGE_SIZE, pebs[m2] = mkpeb(buf1, 0, false), apebs[m2] = mkpeb(empty, avhdr, buf0, m1, false), aehdr = aechdr(m3), m = m2, m2 < # apebs, m2 < # pebs, abs(pebs, apebs), abs-peb(mkpeb(buf1, 0, false), mkpeb(empty, avhdr, buf0, m1, false)), is-encoded(echdr(m3), buf2), mtd-cons(pebs), ubi-io-inv(apebs), ⌊err0⌋ ⊦ ⟨if ubi-io-write-echdr-pre(m, aehdr, apebs) then {fail_or_success#(; ; err); if err = ESUCCESS then apebs[m].echdr := aehdr else choose aehdr with ¬ aehdr.valid? in apebs[m].echdr := aehdr} else abort⟩ (abs(pebs, apebs) ∧ err0 = err)

Rule argument

pos: right 1

Additional information

Used simplifier rules: aubi_io_write_echdr#(PNUM, AEHDR; APEBS; ERR) {if ubi-io-write-echdr-pre(PNUM, AEHDR, APEBS) then {fail_or_success#(; ; ERR); if ERR = ESUCCESS then APEBS[PNUM].echdr := AEHDR else choose AEHDR with ¬ AEHDR.valid? in APEBS[PNUM].echdr := AEHDR} else abort };