From Termination-Portal.org

Nonloop (Nonloop)

• developed at HTWK Leipzig, DE
• home page: http://dfa.imn.htwk-leipzig.de/nonloop/
• developers: Martin Oppelt
• publication: Bibtex:Oppelt08

Proves non-termination of string rewriting, by searching for patterns in derivations. Can handle non-looping non-termination.