/usr/share/acl2-7.1/books/arithmetic-5/ is in acl2-books 7.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/acl2-7.1/books/arithmetic-5/lib/
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/arithmetic-theory.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/banner.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/basic.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/building-blocks-helper.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/building-blocks.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/collect.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/common.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/default-hint.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/distributivity.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/dynamic-e-d.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/elim-hint.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/expt-helper.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/expt.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/forcing-types.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/if-normalization.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/integerp-helper.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/integerp-meta.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/integerp.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/mini-theories.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/natp-posp.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/normalize.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/numerator-and-denominator.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/remove-weak-inequalities.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/simple-equalities-and-inequalities-helper.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/simple-equalities-and-inequalities.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/simplify-helper.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/simplify.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/top.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/types-helper.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/types.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/basic-ops/we-are-here.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/floor-mod/
/usr/share/acl2-7.1/books/arithmetic-5/lib/floor-mod/floor-mod-basic-helper.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/floor-mod/floor-mod-basic.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/floor-mod/floor-mod-helper.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/floor-mod/floor-mod.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/floor-mod/forcing-types.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/floor-mod/if-normalization.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/floor-mod/logand-helper.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/floor-mod/logand.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/floor-mod/mod-expt-fast.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/floor-mod/more-floor-mod.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/floor-mod/top.o
/usr/share/acl2-7.1/books/arithmetic-5/lib/floor-mod/truncate-rem.o
/usr/share/acl2-7.1/books/arithmetic-5/support/
/usr/share/acl2-7.1/books/arithmetic-5/support/basic-arithmetic-helper.o
/usr/share/acl2-7.1/books/arithmetic-5/support/basic-arithmetic.o
/usr/share/acl2-7.1/books/arithmetic-5/support/expt-helper.o
/usr/share/acl2-7.1/books/arithmetic-5/support/expt.o
/usr/share/acl2-7.1/books/arithmetic-5/support/inequalities.o
/usr/share/acl2-7.1/books/arithmetic-5/support/mini-theories.o
/usr/share/acl2-7.1/books/arithmetic-5/support/non-linear.o
/usr/share/acl2-7.1/books/arithmetic-5/support/num-and-denom-helper.o
/usr/share/acl2-7.1/books/arithmetic-5/support/numerator-and-denominator.o
/usr/share/acl2-7.1/books/arithmetic-5/support/prefer-times.o
/usr/share/acl2-7.1/books/arithmetic-5/support/top.o
/usr/share/acl2-7.1/books/arithmetic-5/top.o