Termination Proof Script

Consider the TRS R consisting of the rewrite rules
1:    app(app(const,x),y)  → x
2:    app(app(app(subst,f),g),x)  → app(app(f,x),app(g,x))
3:    app(app(fix,f),x)  → app(app(f,app(fix,f)),x)
There are 5 dependency pairs:
4:    APP(app(app(subst,f),g),x)  → APP(app(f,x),app(g,x))
5:    APP(app(app(subst,f),g),x)  → APP(f,x)
6:    APP(app(app(subst,f),g),x)  → APP(g,x)
7:    APP(app(fix,f),x)  → APP(app(f,app(fix,f)),x)
8:    APP(app(fix,f),x)  → APP(f,app(fix,f))
Consider the SCC {4-8}. The constraints could not be solved.
Tyrolean Termination Tool  (0.02 seconds)   ---  May 3, 2006