I was wondering, what would happen if the algorithm create an existing riff and use it in a composition? Gotye use a riff from "Luiz Bonfá - Seville" in "Someb

I was wondering, what would happen if the algorithm create an existing riff and use it in a composition? Gotye use a riff from "Luiz Bonfá - Seville" in "Somebody I Used to Know" and it costs him 1M$