YES Consider the TRS R consisting of the following rewrite rule: f(g(x,y),f(y,y)) -> f(g(y,x),y) The TRS R is terminating because R is match-raise-bounded for the set of all ground terms by 2. A raise-consistent and quasi-deterministic tree automaton compatible with match(R) and the set of all ground terms has - 5 states (1,...,5) - 3 final states (1,3,5) - 88 transitions: f_2(4,5) -> 1 f_2(5,5) -> 1 f_2(4,3) -> 1 f_2(5,3) -> 1 f_1(2,5) -> 1 f_1(5,1) -> 1 f_1(2,1) -> 1 f_1(5,5) -> 1 f_1(3,5) -> 1 f_1(3,1) -> 1 f_1(2,3) -> 1 f_1(5,3) -> 1 f_1(3,3) -> 1 f_0(1,3) -> 1 f_0(5,5) -> 1 f_0(3,5) -> 1 f_0(3,1) -> 1 f_0(1,5) -> 1 f_0(1,1) -> 1 f_0(5,3) -> 1 f_0(3,3) -> 1 f_0(5,1) -> 1 g_2(3,3) -> 4 g_2(3,3) -> 2 g_2(3,3) -> 1 g_2(3,3) -> 3 g_2(3,3) -> 5 g_2(5,1) -> 5 g_2(5,1) -> 3 g_2(5,1) -> 1 g_2(5,1) -> 2 g_2(5,1) -> 4 g_2(5,5) -> 5 g_2(5,5) -> 3 g_2(5,5) -> 1 g_2(5,5) -> 2 g_2(5,5) -> 4 g_2(3,5) -> 5 g_2(3,5) -> 3 g_2(3,5) -> 1 g_2(3,5) -> 2 g_2(3,5) -> 4 g_2(3,1) -> 4 g_2(3,1) -> 2 g_2(3,1) -> 1 g_2(3,1) -> 3 g_2(3,1) -> 5 g_2(5,3) -> 5 g_2(5,3) -> 3 g_2(5,3) -> 1 g_2(5,3) -> 2 g_2(5,3) -> 4 g_1(5,1) -> 3 g_1(5,1) -> 2 g_1(5,1) -> 1 g_1(1,3) -> 3 g_1(1,3) -> 1 g_1(1,3) -> 2 g_1(5,5) -> 3 g_1(5,5) -> 2 g_1(5,5) -> 1 g_1(3,5) -> 3 g_1(3,5) -> 2 g_1(3,5) -> 1 g_1(3,1) -> 3 g_1(3,1) -> 1 g_1(3,1) -> 2 g_1(1,5) -> 3 g_1(1,5) -> 2 g_1(1,5) -> 1 g_1(1,1) -> 2 g_1(1,1) -> 1 g_1(1,1) -> 3 g_1(5,3) -> 3 g_1(5,3) -> 2 g_1(5,3) -> 1 g_1(3,3) -> 3 g_1(3,3) -> 1 g_1(3,3) -> 2 g_0(1,3) -> 1 g_0(5,5) -> 1 g_0(3,5) -> 1 g_0(3,1) -> 1 g_0(1,5) -> 1 g_0(1,1) -> 1 g_0(5,3) -> 1 g_0(3,3) -> 1 g_0(5,1) -> 1 ________________________________________________________________ TTTbox (0.010 seconds) - April 13, 2007 Source file - /home/ami/mkorp/Testbench/tpdb-3.2/TRS/HM/t006.trs