/usr/share/acl2-7.1/books/std/util/ is in acl2-books-source 7.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/acl2-7.1/books/std/util/bstar.lisp
/usr/share/acl2-7.1/books/std/util/cert.acl2
/usr/share/acl2-7.1/books/std/util/da-base.lisp
/usr/share/acl2-7.1/books/std/util/defaggregate.lisp
/usr/share/acl2-7.1/books/std/util/defaggrify-defrec.lisp
/usr/share/acl2-7.1/books/std/util/defalist-base.lisp
/usr/share/acl2-7.1/books/std/util/defalist.lisp
/usr/share/acl2-7.1/books/std/util/defconsts.lisp
/usr/share/acl2-7.1/books/std/util/defenum.lisp
/usr/share/acl2-7.1/books/std/util/define.lisp
/usr/share/acl2-7.1/books/std/util/defines.acl2
/usr/share/acl2-7.1/books/std/util/defines.lisp
/usr/share/acl2-7.1/books/std/util/deflist-aux.lisp
/usr/share/acl2-7.1/books/std/util/deflist-base.lisp
/usr/share/acl2-7.1/books/std/util/deflist.lisp
/usr/share/acl2-7.1/books/std/util/defmapappend.lisp
/usr/share/acl2-7.1/books/std/util/defmvtypes.lisp
/usr/share/acl2-7.1/books/std/util/defprojection.lisp
/usr/share/acl2-7.1/books/std/util/defredundant.lisp
/usr/share/acl2-7.1/books/std/util/defrule.lisp
/usr/share/acl2-7.1/books/std/util/defsum.lisp
/usr/share/acl2-7.1/books/std/util/defval.lisp
/usr/share/acl2-7.1/books/std/util/extensions/
/usr/share/acl2-7.1/books/std/util/extensions/assert-return-thms.lisp
/usr/share/acl2-7.1/books/std/util/extensions/cert.acl2
/usr/share/acl2-7.1/books/std/util/formals.lisp
/usr/share/acl2-7.1/books/std/util/generate-symbol.lisp
/usr/share/acl2-7.1/books/std/util/look-up.lisp
/usr/share/acl2-7.1/books/std/util/maybe-defthm.lisp
/usr/share/acl2-7.1/books/std/util/returnspecs.lisp
/usr/share/acl2-7.1/books/std/util/support.lisp
/usr/share/acl2-7.1/books/std/util/tests/
/usr/share/acl2-7.1/books/std/util/tests/bstar.lisp
/usr/share/acl2-7.1/books/std/util/tests/cert.acl2
/usr/share/acl2-7.1/books/std/util/tests/defaggregate.lisp
/usr/share/acl2-7.1/books/std/util/tests/defaggrify-defrec.lisp
/usr/share/acl2-7.1/books/std/util/tests/defalist.lisp
/usr/share/acl2-7.1/books/std/util/tests/define.lisp
/usr/share/acl2-7.1/books/std/util/tests/defines.lisp
/usr/share/acl2-7.1/books/std/util/tests/deflist.lisp
/usr/share/acl2-7.1/books/std/util/tests/defmapappend.lisp
/usr/share/acl2-7.1/books/std/util/tests/defprojection.lisp
/usr/share/acl2-7.1/books/std/util/tests/defredundant.lisp
/usr/share/acl2-7.1/books/std/util/tests/defval.lisp
/usr/share/acl2-7.1/books/std/util/tests/top.lisp
/usr/share/acl2-7.1/books/std/util/top.lisp
/usr/share/acl2-7.1/books/std/util/wizard.lisp