/usr/share/acl2-6.3/books/rtl/rel1/ is in acl2-books 6.3-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/acl2-6.3/books/rtl/rel1/lib1/
/usr/share/acl2-6.3/books/rtl/rel1/lib1/basic.o
/usr/share/acl2-6.3/books/rtl/rel1/lib1/bits.o
/usr/share/acl2-6.3/books/rtl/rel1/lib1/brat.o
/usr/share/acl2-6.3/books/rtl/rel1/lib1/float.o
/usr/share/acl2-6.3/books/rtl/rel1/lib1/reps.o
/usr/share/acl2-6.3/books/rtl/rel1/lib1/round.o
/usr/share/acl2-6.3/books/rtl/rel1/lib1/top.o
/usr/share/acl2-6.3/books/rtl/rel1/lib3/
/usr/share/acl2-6.3/books/rtl/rel1/lib3/basic.o
/usr/share/acl2-6.3/books/rtl/rel1/lib3/bits.o
/usr/share/acl2-6.3/books/rtl/rel1/lib3/brat.o
/usr/share/acl2-6.3/books/rtl/rel1/lib3/fadd.o
/usr/share/acl2-6.3/books/rtl/rel1/lib3/float.o
/usr/share/acl2-6.3/books/rtl/rel1/lib3/reps.o
/usr/share/acl2-6.3/books/rtl/rel1/lib3/round.o
/usr/share/acl2-6.3/books/rtl/rel1/lib3/top.o
/usr/share/acl2-6.3/books/rtl/rel1/support/
/usr/share/acl2-6.3/books/rtl/rel1/support/add.o
/usr/share/acl2-6.3/books/rtl/rel1/support/away.o
/usr/share/acl2-6.3/books/rtl/rel1/support/basic.o
/usr/share/acl2-6.3/books/rtl/rel1/support/divsqrt.o
/usr/share/acl2-6.3/books/rtl/rel1/support/fadd/
/usr/share/acl2-6.3/books/rtl/rel1/support/fadd/add3.o
/usr/share/acl2-6.3/books/rtl/rel1/support/fadd/lop1.o
/usr/share/acl2-6.3/books/rtl/rel1/support/fadd/lop2.o
/usr/share/acl2-6.3/books/rtl/rel1/support/fadd/lop3.o
/usr/share/acl2-6.3/books/rtl/rel1/support/fadd/stick.o
/usr/share/acl2-6.3/books/rtl/rel1/support/fadd/top.o
/usr/share/acl2-6.3/books/rtl/rel1/support/float.o
/usr/share/acl2-6.3/books/rtl/rel1/support/floor.o
/usr/share/acl2-6.3/books/rtl/rel1/support/fp.o
/usr/share/acl2-6.3/books/rtl/rel1/support/logdefs.o
/usr/share/acl2-6.3/books/rtl/rel1/support/loglemmas.o
/usr/share/acl2-6.3/books/rtl/rel1/support/logxor-def.o
/usr/share/acl2-6.3/books/rtl/rel1/support/logxor-lemmas.o
/usr/share/acl2-6.3/books/rtl/rel1/support/merge.o
/usr/share/acl2-6.3/books/rtl/rel1/support/near.o
/usr/share/acl2-6.3/books/rtl/rel1/support/odd.o
/usr/share/acl2-6.3/books/rtl/rel1/support/proofs.o
/usr/share/acl2-6.3/books/rtl/rel1/support/reps.o
/usr/share/acl2-6.3/books/rtl/rel1/support/rewrite-theory.o
/usr/share/acl2-6.3/books/rtl/rel1/support/rnd.o
/usr/share/acl2-6.3/books/rtl/rel1/support/sticky.o
/usr/share/acl2-6.3/books/rtl/rel1/support/trunc.o
/usr/share/acl2-6.3/books/rtl/rel1/support/x-2xx.o