YES
Input TRS:
      1: a__from(X) -> cons(mark(X),from(s(X)))
      2: a__length(nil()) -> 0()
      3: a__length(cons(X,Y)) -> s(a__length1(Y))
      4: a__length1(X) -> a__length(X)
      5: mark(from(X)) -> a__from(mark(X))
      6: mark(length(X)) -> a__length(X)
      7: mark(length1(X)) -> a__length1(X)
      8: mark(cons(X1,X2)) -> cons(mark(X1),X2)
      9: mark(s(X)) -> s(mark(X))
      10: mark(nil()) -> nil()
      11: mark(0()) -> 0()
      12: a__from(X) -> from(X)
      13: a__length(X) -> length(X)
      14: a__length1(X) -> length1(X)
Number of strict rules: 14
Direct POLO(bPol) ... failed.
Uncurrying ... failed.
Dependency Pairs:
     #1: #mark(length(X)) -> #a__length(X)
     #2: #mark(s(X)) -> #mark(X)
     #3: #mark(length1(X)) -> #a__length1(X)
     #4: #mark(from(X)) -> #a__from(mark(X))
     #5: #mark(from(X)) -> #mark(X)
     #6: #a__length(cons(X,Y)) -> #a__length1(Y)
     #7: #a__from(X) -> #mark(X)
     #8: #mark(cons(X1,X2)) -> #mark(X1)
     #9: #a__length1(X) -> #a__length(X)
Number of SCCs: 2, DPs: 7
  SCC { #6 #9 }
POLO(Sum)... succeeded.
      #a__length1	w: x1 + 1
      s 	w: 0
      #a__from	w: 0
      a__from	w: 0
      length1	w: 0
      a__length1	w: 0
      #mark	w: 0
      0 	w: 0
      from	w: 0
      nil	w: 0
      mark	w: 0
      #a__length	w: x1
      cons	w: x2 + 2
      length	w: 0
      a__length	w: 0
    USABLE RULES: { }
    Removed DPs: #6 #9
Number of SCCs: 1, DPs: 5
  SCC { #2 #4 #5 #7 #8 }
POLO(Sum)... succeeded.
      #a__length1	w: 1
      s 	w: x1
      #a__from	w: x1 + 1
      a__from	w: x1 + 38141
      length1	w: 1
      a__length1	w: 1144
      #mark	w: x1
      0 	w: 282
      from	w: x1 + 38141
      nil	w: 1
      mark	w: x1 + 38139
      #a__length	w: 0
      cons	w: x1 + 1
      length	w: 1090
      a__length	w: 1144
    USABLE RULES: { 1..14 }
    Removed DPs: #4 #5 #7 #8
Number of SCCs: 1, DPs: 1
  SCC { #2 }
POLO(Sum)... succeeded.
      #a__length1	w: 1
      s 	w: x1 + 1
      #a__from	w: x1 + 1
      a__from	w: 50350
      length1	w: x1 + 917
      a__length1	w: x1 + 1324
      #mark	w: x1
      0 	w: 51861
      from	w: 50349
      nil	w: 50537
      mark	w: x1 + 25907
      #a__length	w: 0
      cons	w: x2 + 1
      length	w: x1 + 458
      a__length	w: x1 + 1324
    USABLE RULES: { 1..14 }
    Removed DPs: #2
Number of SCCs: 0, DPs: 0