YES

This TRS is terminating using the deltasimple interpretation 
a(delta3) =  + 1 + 0*delta3
b(delta2) =  + 1 + 0*delta2
++(delta1, X2, X1) =  + 1*X1 + 1*X2 + 1 + 0*X1*delta1 + 0*X2*delta1 + 0*delta1
rev(delta0, X0) =  + 1*X0 + 0 + 1*X0*delta0 + 0*delta0
++_tau_1(delta1) =  + (delta1/(1 + 0 * delta1))
++_tau_2(delta1) =  + (delta1/(1 + 0 * delta1))
rev_tau_1(delta0) =  + (delta0/(1 + 1 * delta0))
SUCCESS

Statistics:
Number of monomials: 221