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Proof step 4 from proof refine-remap (previous step)

# lpt = # avol0 - m5, m5 + # lpt0 = # avol0, avol0[m1] = mapped(buf1), avol0[m2] = mapped(buf0), avol0[0] = mapped(buf), avol = subarray(avol0, m5, # lpt), sb = mksb(adr, m0, m1, m2, m3, m4, m5), m < # lpt0, disk-layout(sb, # lpt0), ebm-vol-inv(avol0), ebm-vol-inv(subarray(avol0, m5, # lpt)), is-encoded(lpt0, lebs(avol0, m4, lptlebs(# lpt0, LEB_SIZE))), is-encoded(sb, buf), is-encoded(lpt, lebs(avol0, m4, lptlebs(# lpt, LEB_SIZE))), is-encoded(log, buf1), is-encoded-pad(orphans, m3, buf0), mapped-full?(avol0, m4, lptlebs(# lpt0, LEB_SIZE)), logoff ≠ LEB_SIZE → # buf1 = logoff ⊦ ⟪persistence_io_remap#(m, sb; avol0; err)⟫ ⟨apersistence_io_remap#(m, adr, m0, log, lpt, orphans; avol; err0)⟩ ( # avol0 = m5 + (# avol0 - m5) ∧ avol = subarray(avol0, m5, # avol0 - m5) ∧ is-encoded(log, avol0[m1].data) ∧ is-encoded(lpt, lebs(avol0, m4, lptlebs(# avol0 - m5, LEB_SIZE))) ∧ is-encoded-pad(orphans, m3, avol0[m2].data) ∧ err = err0)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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