[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 318 from proof refine-write (previous step)

# apebs = # wlar, apebs[n4] = mkpeb(aehdr, avhdr, buf2, m0, false), vols[v][vtblpnum3] = ⌜n4⌝ , avols[v][vtblpnum3] = mapped(buf2, m), wlar[n4] = wl-entry(m1, used), buf0 = mkbuf(vtblpnum5 + n1), err = ESUCCESS, err = err0, aehdr.valid?, avhdr.valid?, vtblpnum3 < # vols[v], vtblpnum3 < # avols[v], n4 < # wlar, abs(avols, apebs, vols, q), bflipset-cons(bflipset, wlar), ebm-cons(avols), is-aligned(vtblpnum5, EB_PAGE_SIZE), is-aligned(n1, EB_PAGE_SIZE), ubi-io-inv(apebs), ubi-io-peb-inv(mkpeb(aehdr, avhdr, buf2, m0, false)), unique-sqns(apebs), valid-ebatbl(apebs, wlar, vols, vtblpnum4), valid-eraseq(q), valid-eraseq(wlar, q), valid-eraseq(apebs, q), valid-global-sqn(apebs, sqnum), valid-vtbl(apebs, vols, wlar, vtblpnum4), valid-wl(apebs, wlar), v ∈ vols, v ∈ avols, vtblpnum5 ≤ LEB_SIZE, m ≤ LEB_SIZE, m0 ≤ LEB_SIZE, vtblpnum5 + n1 ≤ LEB_SIZE, n3 + n1 ≤ # buf, n1 + n3 ≤ # buf, m ≤ vtblpnum5, m0 ≤ vtblpnum5, ⌊err2⌋ , ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪buf0 := copy(apebs[vols[v][vtblpnum3].pnum].data, 0, buf0, 0, vtblpnum5); err2 := err, buf1 := buf0; if err2 = ESUCCESS then {buf1 := copy(buf, n3, buf1, vtblpnum5, n1); debug#("ubi: moving data from PEB " + vols[v][vtblpnum3].pnum.toString); ubi_change#(v, vtblpnum3, vtblpnum5 + n1, buf1, EB_PAGE_SIZE; vols, wlar, q, bflipset, vtblpnum4, sqnum, apebs; err2)} else debug#("ubi: failed to read data from PEB " + vols[v][vtblpnum3].pnum.toString)⟫ ⟨ebm_write#(v, vtblpnum3, vtblpnum5, n3, n1, buf; avols; err1)⟩ (abs(avols, apebs, vols, q) ∧ err2 = err1), n1 = 0, vtblpnum4 = n4, VTBL_VOLID ∈ vols

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Proof step 319:
# apebs = # wlar, wlar[n4] = wl-entry(m1, used), avols[v][vtblpnum3] = mapped(buf2, m), vols[v][vtblpnum3] = ⌜n4⌝ , apebs[n4] = mkpeb(aehdr, avhdr, buf2, m0, false), buf0 = mkbuf(vtblpnum5 + n1), err = err0, err = ESUCCESS, avhdr.valid?, aehdr.valid?, vols[v][vtblpnum3].pnum < # apebs, n4 < # wlar, vtblpnum3 < # avols[v], vtblpnum3 < # vols[v], abs(avols, apebs, vols, q), bflipset-cons(bflipset, wlar), ebm-cons(avols), is-aligned(n1, EB_PAGE_SIZE), is-aligned(vtblpnum5, EB_PAGE_SIZE), ubi-io-inv(apebs), ubi-io-peb-inv(mkpeb(aehdr, avhdr, buf2, m0, false)), unique-sqns(apebs), valid-ebatbl(apebs, wlar, vols, vtblpnum4), valid-eraseq(apebs, q), valid-eraseq(wlar, q), valid-eraseq(q), valid-global-sqn(apebs, sqnum), valid-vtbl(apebs, vols, wlar, vtblpnum4), valid-wl(apebs, wlar), v ∈ avols, v ∈ vols, 0 + vtblpnum5 ≤ # apebs[vols[v][vtblpnum3].pnum].data, 0 + vtblpnum5 ≤ # buf0, m0 ≤ vtblpnum5, m ≤ vtblpnum5, n1 + n3 ≤ # buf, n3 + n1 ≤ # buf, vtblpnum5 + n1 ≤ LEB_SIZE, m0 ≤ LEB_SIZE, m ≤ LEB_SIZE, vtblpnum5 ≤ LEB_SIZE, ⌊err2⌋ , ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪err2 := err, buf1 := copy(apebs[vols[v][vtblpnum3].pnum].data, 0, buf0, 0, vtblpnum5); if err2 = ESUCCESS then {buf1 := copy(buf, n3, buf1, vtblpnum5, n1); debug#("ubi: moving data from PEB " + vols[v][vtblpnum3].pnum.toString); ubi_change#(v, vtblpnum3, vtblpnum5 + n1, buf1, EB_PAGE_SIZE; vols, wlar, q, bflipset, vtblpnum4, sqnum, apebs; err2)} else debug#("ubi: failed to read data from PEB " + vols[v][vtblpnum3].pnum.toString)⟫ ⟨ebm_write#(v, vtblpnum3, vtblpnum5, n3, n1, buf; avols; err1)⟩ (abs(avols, apebs, vols, q) ∧ err2 = err1), vols[v][vtblpnum3] = unmapped, n1 = 0, vtblpnum4 = n4, VTBL_VOLID ∈ vols

Rule argument

Additional information

Used simplifier rules: ⊦ ¬ ⌊ESUCCESS⌋ ; (s)% ⊦ n + 0 = n; (s)%a: ⊦ (m + n0) + n1 = m + n0 + n1; from specification nat-basic%c: ⊦ m + n = n + m; from specification nat-basic% ⊦ # mkbuf(n) = n; (s)% ⊦ m ≤ m + n; (s)%⊦ v ∈ avols ∧ m < # avols[v] ∧ abs(avols, apebs, vols, q) → m < # vols[v]; (ss)% ⊦ v ∈ avols ∧ abs(avols, apebs, vols, q) → v ∈ vols; (ss)% ⊦ ⌜m⌝ .pnum = m; (s)% ⊦ unmapped ≠ ⌜m⌝ ; (s)% ⊦ m ≤ n ↔ ¬ n < m; (ss)%f: ⊦ m < n → n ≠ 0; (forward) from specification nat-basic%fle: ⊦ m < n ∧ n ≤ n0 → m < n0; (forward) from specification nat% ⊦ m < n → n ≠ 0; (s)% ⊦ mkpeb(aehdr, avhdr, buf, m, boolvar).data = buf; (s)%⊦ v ∈ avols ∧ m < # avols[v] ∧ avols[v][m] = mapped(buf, n) ∧ ebm-cons(avols) → # buf = LEB_SIZE; (s)% ⊦ ¬ n < n; (s)