[Imprint][Data Privacy Statement][E-Mail]

View long theorem info. View the proof. Back to main index. View the specification. View theorem base summary, View theorem base listing, the used properties by spec, the dependency list, the symbol table,

Proof step 139 from proof refine-write-data-wl (previous step)

pebs[m1] = mkpeb(buf1, 2 * EB_PAGE_SIZE, false), apebs[m1] = mkpeb(aehdr, avhdr, buf2, 0, false), buf0 = buf, m = m1, n = align↑(datasize(buf, n), EB_PAGE_SIZE), avhdr.valid?, aehdr.valid?, m1 < # pebs, m1 < # apebs, abs(pebs, apebs), abs-peb(mkpeb(buf1, 2 * EB_PAGE_SIZE, false), mkpeb(aehdr, avhdr, buf2, 0, false)), is-aligned(n, EB_PAGE_SIZE), mtd-cons(pebs), ubi-io-inv(apebs), ubi-io-write-data-wl-pre(m, n, buf0, apebs), n ≤ # buf, n ≤ LEB_SIZE, ⌊err0⌋ ⊦ ⟨fail_or_success#(; ; err); if err = ESUCCESS then apebs[m] := mkpeb(apebs[m].echdr, apebs[m].vidhdr, subarray(buf0, 0, n) + mkempbuf(LEB_SIZE - n), n, apebs[m].bad) else choose buf with # buf ≤ n ∧ is-aligned(# buf, EB_PAGE_SIZE) ∧ ( datasize(buf, # buf) < datasize(buf0, n) ∨ checksum(buf + mkempbuf(n - # buf), datasize(buf0, n)) ≠ checksum(buf0, datasize(buf0, n))) in apebs[m] := mkpeb(apebs[m].echdr, apebs[m].vidhdr, buf + mkempbuf(LEB_SIZE - # buf), # buf, apebs[m].bad)⟩ (abs(pebs, apebs) ∧ err0 = err), datasize(buf, n) = 0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 140:
pebs[m1] = mkpeb(buf1, 2 * EB_PAGE_SIZE, false), apebs[m1] = mkpeb(aehdr, avhdr, buf2, 0, false), n = align↑(datasize(buf, n), EB_PAGE_SIZE), datasize(buf, n) ≠ 0, avhdr.valid?, aehdr.valid?, m1 < # pebs, m1 < # apebs, abs(pebs, apebs), abs-peb(mkpeb(buf1, 2 * EB_PAGE_SIZE, false), mkpeb(aehdr, avhdr, buf2, 0, false)), is-aligned(n, EB_PAGE_SIZE), mtd-cons(pebs), ubi-io-inv(apebs), n ≤ # buf, n ≤ LEB_SIZE, ⌊err0⌋ ⊦ ⟨fail_or_success#(; ; err); if err = ESUCCESS then apebs[m1] := mkpeb(apebs[m1].echdr, apebs[m1].vidhdr, subarray(buf, 0, n) + mkempbuf(LEB_SIZE - n), n, apebs[m1].bad) else choose buf1 with # buf1 ≤ n ∧ is-aligned(# buf1, EB_PAGE_SIZE) ∧ ( datasize(buf1, # buf1) < datasize(buf, n) ∨ checksum(buf1 + mkempbuf(n - # buf1), datasize(buf, n)) ≠ checksum(buf, datasize(buf, n))) in apebs[m1] := mkpeb(apebs[m1].echdr, apebs[m1].vidhdr, buf1 + mkempbuf(LEB_SIZE - # buf1), # buf1, apebs[m1].bad)⟩ (abs(pebs, apebs) ∧ err0 = err)

Rule argument

Additional information

Used simplifier rules: ⊦ mkpeb(aehdr, avhdr, buf, m, boolvar).bad ↔ boolvar; (s)% ⊦ mkpeb(aehdr, avhdr, buf, m, boolvar).echdr = aehdr; (s)% ⊦ mkpeb(aehdr, avhdr, buf, m, boolvar).vidhdr = avhdr; (s)% ⊦ mkpeb(aehdr, avhdr, buf, m, boolvar).fill = m; (s)%⊦ ubi-io-write-data-wl-pre(n, n1, buf, apebs) ↔ n < # apebs ∧ ¬ apebs[n].bad ∧ apebs[n].echdr.valid? ∧ apebs[n].vidhdr.valid? ∧ n1 = align↑(datasize(buf, n1), EB_PAGE_SIZE) ∧ apebs[n].fill = 0 ∧ n1 ≤ LEB_SIZE ∧ n1 ≤ # buf ∧ datasize(buf, n1) ≠ 0; (s)