/usr/share/ada/adainclude/ is in libahven3-dev 2.1-4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/ada/adainclude/ahven/
/usr/share/ada/adainclude/ahven.gpr
/usr/share/ada/adainclude/ahven/ahven-astrings.ads
/usr/share/ada/adainclude/ahven/ahven-framework.adb
/usr/share/ada/adainclude/ahven/ahven-framework.ads
/usr/share/ada/adainclude/ahven/ahven-listeners-basic.adb
/usr/share/ada/adainclude/ahven/ahven-listeners-basic.ads
/usr/share/ada/adainclude/ahven/ahven-listeners.ads
/usr/share/ada/adainclude/ahven/ahven-parameters.adb
/usr/share/ada/adainclude/ahven/ahven-parameters.ads
/usr/share/ada/adainclude/ahven/ahven-results.adb
/usr/share/ada/adainclude/ahven/ahven-results.ads
/usr/share/ada/adainclude/ahven/ahven-runner.adb
/usr/share/ada/adainclude/ahven/ahven-runner.ads
/usr/share/ada/adainclude/ahven/ahven-slist.adb
/usr/share/ada/adainclude/ahven/ahven-slist.ads
/usr/share/ada/adainclude/ahven/ahven-tap_runner.adb
/usr/share/ada/adainclude/ahven/ahven-tap_runner.ads
/usr/share/ada/adainclude/ahven/ahven-temporary_output.adb
/usr/share/ada/adainclude/ahven/ahven-temporary_output.ads
/usr/share/ada/adainclude/ahven/ahven-text_runner.adb
/usr/share/ada/adainclude/ahven/ahven-text_runner.ads
/usr/share/ada/adainclude/ahven/ahven-xml_runner.adb
/usr/share/ada/adainclude/ahven/ahven-xml_runner.ads
/usr/share/ada/adainclude/ahven/ahven.adb
/usr/share/ada/adainclude/ahven/ahven.ads
/usr/share/ada/adainclude/ahven/ahven_compat.adb
/usr/share/ada/adainclude/ahven/ahven_compat.ads