YES

This TRS is terminating using the restricteddeltasimple interpretation 
c(delta9) =  + 3 + 1*delta9
s(delta8, X5) =  + 1*X5 + 0 + 0*X5*delta8 + 1*delta8
b(delta7) =  + 0 + 6*delta7
a(delta6) =  + 0 + 7*delta6
f(delta5, X4, X3) =  + 0*X3 + 0*X4 + 0 + 1*X3*delta5 + 4*X4*delta5 + 0*delta5
s_tau_1(delta8) =  + 1(delta8/(1 + 0 * delta8))
f_tau_1(delta5) =  + 1(delta5/(0 + 4 * delta5))
f_tau_2(delta5) =  + 1(delta5/(0 + 1 * delta5))

Time: 27.466421 seconds
SUCCESS

Statistics:
Number of monomials: 193
Last formula building started for bound 7
Last SAT solving started for bound 7