YES

This TRS is terminating using the deltasimple interpretation 
fst(delta7, X6, X5) =  + 1*X5 + 0*X6 + 0 + 0*X5*delta7 + 1*X6*delta7 + 0*delta7
from(delta6, X4) =  + 1*X4 + 0 + 0*X4*delta6 + 1*delta6
add(delta5, X3, X2) =  + 1*X2 + 1*X3 + 0 + 0*X2*delta5 + 1*X3*delta5 + 0*delta5
nil(delta4) =  + 0 + 0*delta4
0(delta3) =  + 1 + 0*delta3
cons(delta2, X1) =  + 1*X1 + 0 + 0*X1*delta2 + 0*delta2
len(delta1, X0) =  + 1*X0 + 1 + 0*X0*delta1 + 1*delta1
s(delta0) =  + 1 + 0*delta0
fst_tau_1(delta7) =  + (delta7/(0 + 1 * delta7))
fst_tau_2(delta7) =  + (delta7/(1 + 0 * delta7))
from_tau_1(delta6) =  + (delta6/(1 + 0 * delta6))
add_tau_1(delta5) =  + (delta5/(1 + 1 * delta5))
add_tau_2(delta5) =  + (delta5/(1 + 0 * delta5))
cons_tau_1(delta2) =  + (delta2/(1 + 0 * delta2))
len_tau_1(delta1) =  + (delta1/(1 + 0 * delta1))
SUCCESS

Statistics:
Number of monomials: 168