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Proof step 149 from proof refine-write-data-wl (previous step)

pebs[m1] = mkpeb(buf0, 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(buf0, 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, ⌊err1⌋ ⊦ ∃ buf1. # 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))) ∧ ⟨apebs[m1] := mkpeb(apebs[m1].echdr, apebs[m1].vidhdr, buf1 + mkempbuf(LEB_SIZE - # buf1), # buf1, apebs[m1].bad)⟩ abs(pebs, apebs)

User applied rule exists right

And obtained the following new goals

Proof step 150:
apebs[m1] = mkpeb(aehdr, avhdr, buf2, 0, false), pebs[m1] = mkpeb(buf0, 2 * EB_PAGE_SIZE, false), n = align↑(datasize(buf, n), EB_PAGE_SIZE), aehdr.valid?, avhdr.valid?, m1 < # apebs, m1 < # pebs, abs(pebs, apebs), abs-peb(mkpeb(buf0, 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 ≤ LEB_SIZE, n ≤ # buf, ⌊err1⌋ ⊦ # mkbuf(0) ≤ n ∧ is-aligned(# mkbuf(0), EB_PAGE_SIZE) ∧ ( datasize(mkbuf(0), # mkbuf(0)) < datasize(buf, n) ∨ checksum(mkbuf(0) + mkempbuf(n - # mkbuf(0)), datasize(buf, n)) ≠ checksum(buf, datasize(buf, n))) ∧ ⟨apebs[m1] := mkpeb(apebs[m1].echdr, apebs[m1].vidhdr, mkbuf(0) + mkempbuf(LEB_SIZE - # mkbuf(0)), # mkbuf(0), apebs[m1].bad)⟩ abs(pebs, apebs), datasize(buf, n) = 0

Rule argument

pos: right 1 terms: mkbuf(0) abort: F discard: T computed: F

Additional information

Used terms: mkbuf(0)