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Proof step 15 from proof refine-read (previous step)

# avol0 = # lpt + m6, avol0[m6 + m8] = mapped(buf1), avol0[0] = mapped(buf2), avol0[m3] = mapped(buf3), avol0[m2] = mapped(buf4), m8 < # lpt, disk-layout(mksb(adr, m1, m2, m3, m4, m5, m6), # lpt), ebm-vol-inv(subarray(avol0, m6, # lpt)), ebm-vol-inv(avol0), is-encoded(mksb(adr, m1, m2, m3, m4, m5, m6), buf2), is-encoded(lpt, lebs(avol0, m5, lptlebs(# lpt, LEB_SIZE))), is-encoded(log, buf4), is-encoded-pad(orphans, m4, buf3), mapped-full?(avol0, m5, lptlebs(# lpt, LEB_SIZE)), n2 + n1 ≤ # buf5, m7 + n1 ≤ LEB_SIZE, m6 ≤ # avol0, logoff ≠ LEB_SIZE → # buf4 = logoff, ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪err := err0; buf := buf5; if err = ESUCCESS then buf := copy(avol0[m6 + m8].data + mkempbuf(LEB_SIZE - # avol0[m6 + m8].data), m7, buf, n2, n1) else {n0 := n2; n := n1; choose buf1 with # buf1 = # buf ∧ range=(buf, 0, buf1, 0, n0) ∧ range=(buf, n0 + n, buf1, n0 + n, # buf - n0 + n) in buf := buf1}⟫ ⟨apersistence_io_read#(m8, m7, n2, n1, adr, m1, log, subarray(avol0, m6, # lpt), lpt, orphans; buf5; err1)⟩ (buf = buf5 ∧ err = err1)

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

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