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Proof step 36 from proof refine-write (previous step)

# avol0 = # lpt + m6, avol0[m6 + m8] = mapped(buf0), avol0[0] = mapped(buf1), avol0[m3] = mapped(buf2), avol0[m2] = mapped(buf3), avol = subarray(avol0, m6, # lpt), err = ESUCCESS, m8 < # lpt, disk-layout(mksb(adr, m7, m2, m3, m4, m5, m6), # lpt), ebm-vol-inv(subarray(avol0, m6, # lpt)), ebm-vol-inv(avol0), is-aligned(n3 + # buf0, EB_PAGE_SIZE), is-aligned(n, EB_PAGE_SIZE), is-encoded(mksb(adr, m7, m2, m3, m4, m5, m6), buf1), is-encoded(lpt, lebs(avol0, m5, lptlebs(# lpt, LEB_SIZE))), is-encoded(log, buf3), is-encoded-pad(orphans, m4, buf2), mapped-full?(avol0, m5, lptlebs(# lpt, LEB_SIZE)), n2 + n ≤ # buf, n3 + # buf0 + n ≤ LEB_SIZE, m6 + # lpt ≤ # avol0, logoff ≠ LEB_SIZE → # buf3 = logoff ⊦ ⟨if err = ESUCCESS then if n ≠ 0 then avol[m8] := mapped(avol[m8].data + mkempbuf(n3 + # avol0[m6 + m8].data - # avol[m8].data) + subarray(buf, n2, n)) else {n1 := n2; n0 := n; m1 := m8; m0 := n3 + # avol0[m6 + m8].data; choose n4 with n4 < n0 ∧ is-aligned(n4, EB_PAGE_SIZE) in if n4 ≠ 0 then avol[m1] := mapped(avol[m1].data + mkempbuf(m0 - # avol[m1].data) + subarray(buf, n1, n4)) ifnone skip}⟩ ( avol = subarray(avol0, m6, # lpt)[m8, mapped(avol0[m6 + m8].data + mkempbuf(n3) + subarray(buf, n2, n))] ∧ is-encoded(log, avol0[m6 + m8, mapped(avol0[m6 + m8].data + mkempbuf(n3) + subarray(buf, n2, n))][m2].data) ∧ is-encoded-pad(orphans, m4, avol0[m3].data) ∧ ESUCCESS = err), n = 0

Heuristic symbolic execution applied rule if positive right

And obtained the following new goals

Rule argument

pos: right 1

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