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Theorem inv-read

∃ lpt, log, orphans. persistence-io-inv(sb, logoff, avol, lpt, log, orphans), ebm-vol-inv(avol), sb.main + m < # avol, avol[sb.main + m].mapped?, n + n0 ≤ # buf, m0 + n0 ≤ LEB_SIZE ⊦ ⟪persistence_io_read#(m, m0, n, n0, sb, avol; buf; err)⟫ true

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