My algorithms teacher does research in something similar. IIRC he has a program exactly for showing copy/pasted code. You may want to have a look at his papers

My algorithms teacher does research in something similar. IIRC he has a program exactly for showing copy/pasted code. You may want to have a look at his papers on Clone Detection Tools, "A Novel Approach to Optimize Clone Refactoring Activity", etc. http://www.polymtl.ca/recherche/rc/en/professeurs/details.php?NoProf=123&showtab=PUB http://www.polymtl.ca/recherche/rc/en/professeurs/details.ph...