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Theorem inv-unmap

∃ lpt, log, orphans. persistence-io-inv(sb, logoff, avol, lpt, log, orphans), ebm-vol-inv(avol), sb.main + m < # avol ⊦ ⟪persistence_io_unmap#(m, sb; avol)⟫ ((∃ lpt, log, orphans. persistence-io-inv(sb, logoff, avol, lpt, log, orphans)) ∧ ebm-vol-inv(avol))

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