/usr/share/acl2-6.3/books/misc/defabsstobj-example-4.acl2 is in acl2-books-source 6.3-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | ; Defabsstobj Example 4
; Copyright (C) 2012, Regents of the University of Texas
; Written by Matt Kaufmann, Dec., 2012
; License: A 3-clause BSD license. See the LICENSE file distributed with ACL2.
; cert-flags: ? t :ttags (:restore-state)
(certify-book "defabsstobj-example-4" ? t :ttags (:restore-state))
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