/usr/lib/ is in libemos-dev 2:4.3.7-1.1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/emosR64.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/emos.pc
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/libemos/
/usr/lib/x86_64-linux-gnu/cmake/libemos/libemos-targets-release.cmake
/usr/lib/x86_64-linux-gnu/cmake/libemos/libemos-config.cmake
/usr/lib/x86_64-linux-gnu/cmake/libemos/libemos-targets.cmake
/usr/lib/x86_64-linux-gnu/cmake/libemos/libemos-config-version.cmake
/usr/lib/x86_64-linux-gnu/cmake/libemos/libemos-config.cmake.tpls
/usr/lib/x86_64-linux-gnu/libemos.a
/usr/lib/x86_64-linux-gnu/libemosR64.a
/usr/lib/x86_64-linux-gnu/libemos.R32.D64.I32.so
/usr/lib/x86_64-linux-gnu/libemos.so
/usr/lib/x86_64-linux-gnu/libemos.R32.D64.I32.a
/usr/lib/x86_64-linux-gnu/libemos.R64.D64.I32.a
/usr/lib/x86_64-linux-gnu/libemos.R64.D64.I32.so
/usr/lib/x86_64-linux-gnu/libemosR64.so