YES Consider the TRS R consisting of the following rewrite rules: f(x,g(x)) -> x f(x,h(y)) -> f(h(x),y) The TRS R is transformed (by dropping rewrite rules whose left-hand sides contain a function symbol which does not occur in any right-hand side) into a TRS R' consisting of the following rewrite rule: f(x,h(y)) -> f(h(x),y) The TRS R is terminating because R' is match-bounded for RFC#(R') by 0. A tree automaton compatible with match(R') and RFC#(R') has - 3 states (1,...,3) - 1 final state (1) - 4 transitions: #_0 -> 2 f_0(3,2) -> 1 h_0(3) -> 3 h_0(2) -> 3 __________________________________________________________________ TTTbox (0.004 seconds) - April 13, 2007 Source file - /home/ami/mkorp/Testbench/tpdb-3.2/TRS/SK90/2.55.trs