/usr/share/acl2-6.3/books/cutil/ is in acl2-books-certs 6.3-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/acl2-6.3/books/cutil/da-base.cert
/usr/share/acl2-6.3/books/cutil/defaggregate-tests.cert
/usr/share/acl2-6.3/books/cutil/defaggregate.cert
/usr/share/acl2-6.3/books/cutil/defalist-tests.cert
/usr/share/acl2-6.3/books/cutil/defalist.cert
/usr/share/acl2-6.3/books/cutil/defenum.cert
/usr/share/acl2-6.3/books/cutil/define-tests.cert
/usr/share/acl2-6.3/books/cutil/define.cert
/usr/share/acl2-6.3/books/cutil/deflist-aux.cert
/usr/share/acl2-6.3/books/cutil/deflist-tests.cert
/usr/share/acl2-6.3/books/cutil/deflist.cert
/usr/share/acl2-6.3/books/cutil/defmapappend-tests.cert
/usr/share/acl2-6.3/books/cutil/defmapappend.cert
/usr/share/acl2-6.3/books/cutil/defmvtypes.cert
/usr/share/acl2-6.3/books/cutil/defprojection-tests.cert
/usr/share/acl2-6.3/books/cutil/defprojection.cert
/usr/share/acl2-6.3/books/cutil/defredundant-tests.cert
/usr/share/acl2-6.3/books/cutil/defredundant.cert
/usr/share/acl2-6.3/books/cutil/defrule.cert
/usr/share/acl2-6.3/books/cutil/formals.cert
/usr/share/acl2-6.3/books/cutil/look-up.cert
/usr/share/acl2-6.3/books/cutil/maybe-defthm.cert
/usr/share/acl2-6.3/books/cutil/portcullis.cert
/usr/share/acl2-6.3/books/cutil/returnspecs.cert
/usr/share/acl2-6.3/books/cutil/support.cert
/usr/share/acl2-6.3/books/cutil/tools/
/usr/share/acl2-6.3/books/cutil/tools/assert-return-thms.cert
/usr/share/acl2-6.3/books/cutil/top.cert
/usr/share/acl2-6.3/books/cutil/wizard.cert