YES

This TRS is terminating using the additive interpretation 
activate(delta4, X3) =  + 1*X3 + 3
a(delta3) =  + 0
n__f(delta2, X2) =  + 1*X2 + 1
g(delta1, X1) =  + 1*X1 + 0
f(delta0, X0) =  + 1*X0 + 3
activate_tau_1(delta4) = 
n__f_tau_1(delta2) = 
g_tau_1(delta1) = 
f_tau_1(delta0) = 

Time: 0.001388 seconds
SUCCESS

Statistics:
Number of monomials: 13
Last formula building started for bound 3
Last SAT solving started for bound 3