/usr/share/acl2-6.3/books/coi/gacc/ is in acl2-books-certs 6.3-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/acl2-6.3/books/coi/gacc/abstract-gacc.cert
/usr/share/acl2-6.3/books/coi/gacc/addr-range.cert
/usr/share/acl2-6.3/books/coi/gacc/bits.cert
/usr/share/acl2-6.3/books/coi/gacc/block.cert
/usr/share/acl2-6.3/books/coi/gacc/finite.cert
/usr/share/acl2-6.3/books/coi/gacc/fr-path-connection.cert
/usr/share/acl2-6.3/books/coi/gacc/gacc-exports.cert
/usr/share/acl2-6.3/books/coi/gacc/gacc-pkg.cert
/usr/share/acl2-6.3/books/coi/gacc/gacc.cert
/usr/share/acl2-6.3/books/coi/gacc/gacc2.cert
/usr/share/acl2-6.3/books/coi/gacc/gacc3.cert
/usr/share/acl2-6.3/books/coi/gacc/gax.cert
/usr/share/acl2-6.3/books/coi/gacc/list-ops-common.cert
/usr/share/acl2-6.3/books/coi/gacc/list-ops-fast.cert
/usr/share/acl2-6.3/books/coi/gacc/list-ops.cert
/usr/share/acl2-6.3/books/coi/gacc/mem-fast.cert
/usr/share/acl2-6.3/books/coi/gacc/mem.cert
/usr/share/acl2-6.3/books/coi/gacc/ram.cert
/usr/share/acl2-6.3/books/coi/gacc/ram0.cert
/usr/share/acl2-6.3/books/coi/gacc/ram2.cert
/usr/share/acl2-6.3/books/coi/gacc/ram2b.cert
/usr/share/acl2-6.3/books/coi/gacc/ram3.cert
/usr/share/acl2-6.3/books/coi/gacc/top.cert
/usr/share/acl2-6.3/books/coi/gacc/tr-path-connection.cert
/usr/share/acl2-6.3/books/coi/gacc/wrap.cert