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Proof step 15 from proof inv-read-vidhdr (previous step)

# buf1 = EB_PAGE_SIZE, pebs[m0] = mkpeb(buf0, m1, false), err = ESUCCESS, m0 < # pebs, mtd-cons(pebs), 2 * EB_PAGE_SIZE ≤ PEB_SIZE, err = ESUCCESS → buf1 = subarray(buf0, EB_PAGE_SIZE, EB_PAGE_SIZE), err = ESUCCESS ∨ ⌊err⌋ ⊦ ⟪if buf1 = emptypage then avhdr := empty else let vhdr = ? in {decode_vidheader#(EB_PAGE_SIZE, buf1; vhdr; err); if err = ESUCCESS then avhdr := avidhdr(vhdr.vol, vhdr.leb, vhdr.sqn, vhdr.size, vhdr.checksum)}⟫ true

Heuristic conditional right split applied rule if right

And obtained the following new goals

Proof step 16:
# buf1 = EB_PAGE_SIZE, pebs[m0] = mkpeb(buf0, m1, false), buf1 = emptypage, err = ESUCCESS, m0 < # pebs, mtd-cons(pebs), 2 * EB_PAGE_SIZE ≤ PEB_SIZE, err = ESUCCESS → buf1 = subarray(buf0, EB_PAGE_SIZE, EB_PAGE_SIZE), err = ESUCCESS ∨ ⌊err⌋ ⊦ ⟪avhdr := empty⟫ true
Proof step 17:
# buf1 = EB_PAGE_SIZE, pebs[m0] = mkpeb(buf0, m1, false), err = ESUCCESS, m0 < # pebs, mtd-cons(pebs), 2 * EB_PAGE_SIZE ≤ PEB_SIZE, err = ESUCCESS → buf1 = subarray(buf0, EB_PAGE_SIZE, EB_PAGE_SIZE), err = ESUCCESS ∨ ⌊err⌋ ⊦ ⟪let vhdr = ? in {decode_vidheader#(EB_PAGE_SIZE, buf1; vhdr; err); if err = ESUCCESS then avhdr := avidhdr(vhdr.vol, vhdr.leb, vhdr.sqn, vhdr.size, vhdr.checksum)}⟫ true, buf1 = emptypage

Rule argument

pos: right 1

Proof step 15 from proof inv-read-vidhdr (previous step)

Heuristic conditional right split applied rule if right

And obtained the following new goals

Rule argument

Additional information