If you are working with an emulator, in A.S open Device File Explorer and go to:
/data/user_de/0/android.support.test.orchestrator/files/, then you can look for a particular file there
EDIT: June 25 – 2019 >> If you have updated to AndroidX dependencies, then the .txt file is located in
/data/user_de/0/androidx.test.orchestrator/files/