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Theorem lookup

afs_lookup#(P_INO, DIRS, FILES, ASYNCED; DENT, ERR) {if pre-lookup(P_INO, DENT, DIRS, FILES) then { if DENT.name ∈ DIRS[P_INO].entries then {DENT := mkdentry(DENT.name, DIRS[P_INO].entries[DENT.name]); ERR := ESUCCESS} else {DENT := negdentry(DENT.name); ERR := ENOENT} or fail#(; ; ERR)} else abort }