/usr/share/acl2-7.1/books/oslib/ is in acl2-books 7.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/acl2-7.1/books/oslib/argv-logic.o
/usr/share/acl2-7.1/books/oslib/argv-raw.o
/usr/share/acl2-7.1/books/oslib/argv.o
/usr/share/acl2-7.1/books/oslib/catpath.o
/usr/share/acl2-7.1/books/oslib/copy-logic.o
/usr/share/acl2-7.1/books/oslib/date-logic.o
/usr/share/acl2-7.1/books/oslib/date-raw.o
/usr/share/acl2-7.1/books/oslib/date.o
/usr/share/acl2-7.1/books/oslib/dirname-logic.o
/usr/share/acl2-7.1/books/oslib/file-types-logic.o
/usr/share/acl2-7.1/books/oslib/getpid-logic.o
/usr/share/acl2-7.1/books/oslib/getpid-raw.o
/usr/share/acl2-7.1/books/oslib/getpid.o
/usr/share/acl2-7.1/books/oslib/lisptype-logic.o
/usr/share/acl2-7.1/books/oslib/lisptype-raw.o
/usr/share/acl2-7.1/books/oslib/lisptype.o
/usr/share/acl2-7.1/books/oslib/ls-logic.o
/usr/share/acl2-7.1/books/oslib/mkdir-logic.o
/usr/share/acl2-7.1/books/oslib/portcullis.o
/usr/share/acl2-7.1/books/oslib/read-acl2-oracle.o
/usr/share/acl2-7.1/books/oslib/rmtree-logic.o
/usr/share/acl2-7.1/books/oslib/rmtree-raw.o
/usr/share/acl2-7.1/books/oslib/rmtree.o
/usr/share/acl2-7.1/books/oslib/tempfile-logic.o
/usr/share/acl2-7.1/books/oslib/tempfile.o
/usr/share/acl2-7.1/books/oslib/tests/
/usr/share/acl2-7.1/books/oslib/tests/date.o
/usr/share/acl2-7.1/books/oslib/tests/getpid.o
/usr/share/acl2-7.1/books/oslib/tests/lisptype.o
/usr/share/acl2-7.1/books/oslib/top-logic.o