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Proof step 33 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), EB_PAGE_SIZE ≤ PEB_SIZE ⊦ ⟨fail_or_success#(; ; err); if err = ESUCCESS then apebs[m2].echdr := aechdr(m3) else {m := m2; choose aehdr with ¬ aehdr.valid? in apebs[m].echdr := aehdr}⟩ (abs(pebs[m2, (pebs[m2].data:= copy(buf2, 0, pebs[m2].data, 0, EB_PAGE_SIZE)).fill:= EB_PAGE_SIZE], apebs) ∧ ESUCCESS = err)

Heuristic unfold applied rule call right

And obtained the following new goals

Proof step 34:
# buf2 = EB_PAGE_SIZE, pebs[m2] = mkpeb(buf1, 0, false), apebs[m2] = mkpeb(empty, avhdr, buf0, m1, false), 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), EB_PAGE_SIZE ≤ PEB_SIZE ⊦ ⟨choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0; if err = ESUCCESS then apebs[m2].echdr := aechdr(m3) else {m := m2; choose aehdr with ¬ aehdr.valid? in apebs[m].echdr := aehdr}⟩ (abs(pebs[m2, (pebs[m2].data:= copy(buf2, 0, pebs[m2].data, 0, EB_PAGE_SIZE)).fill:= EB_PAGE_SIZE], apebs) ∧ ESUCCESS = err)

Rule argument

pos: right 1

Additional information

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