YES Consider the TRS R consisting of the following rewrite rules: +(x,+(y,z)) -> +(+(x,y),z) +(*(x,y),+(x,z)) -> *(x,+(y,z)) +(*(x,y),+(*(x,z),u)) -> +(*(x,+(y,z)),u) The TRS R is terminating because R is match-raise-bounded for RFC#'(R) by 0. A raise-compatible and quasi-deterministic tree automaton compatible with match(R) and RFC#'(R) has - 8 states (1,...,8) - 6 final states (1,4,5,6,7,8) - 13 transitions: #_0 -> 2 *_0(2,6) -> 6 *_0(2,3) -> 6 *_0(2,7) -> 6 *_0(2,8) -> 6 +_0(7,2) -> 7 +_0(2,2) -> 3 +_0(5,2) -> 5 +_0(8,2) -> 8 +_0(3,2) -> 7 +_0(6,2) -> 8 +_0(1,2) -> 7 +_0(4,2) -> 5 __________________________________________________________________ TTTbox (0.010 seconds) - April 13, 2007 Source file - /home/ami/mkorp/Testbench/tpdb-3.2/TRS/SK90/2.06.trs