YES Problem: 0(1(2(1(x1)))) -> 1(2(1(1(0(1(2(0(1(2(x1)))))))))) 0(1(2(1(x1)))) -> 1(2(1(1(0(1(2(0(1(2(0(1(2(x1))))))))))))) 0(1(2(1(x1)))) -> 1(2(1(1(0(1(2(0(1(2(0(1(2(0(1(2(x1)))))))))))))))) 0(1(2(1(x1)))) -> 1(2(1(1(0(1(2(0(1(2(0(1(2(0(1(2(0(1(2(x1))))))))))))))))))) 0(1(2(1(x1)))) -> 1(2(1(1(0(1(2(0(1(2(0(1(2(0(1(2(0(1(2(0(1(2(x1)))))))))))))))))))))) 0(1(2(1(x1)))) -> 1(2(1(1(0(1(2(0(1(2(0(1(2(0(1(2(0(1(2(0(1(2(0(1(2(x1))))))))))))))))))))))))) 0(1(2(1(x1)))) -> 1(2(1(1(0(1(2(0(1(2(0(1(2(0(1(2(0(1(2(0(1(2(0(1(2(0(1(2(x1)))))))))))))))))))))))))))) 0(1(2(1(x1)))) -> 1(2(1(1(0(1(2(0(1(2(0(1(2(0(1(2(0(1(2(0(1(2(0(1(2(0(1(2(0(1(2(x1))))))))))))))))))))))))))))))) Proof: String Reversal Processor: 1(2(1(0(x1)))) -> 2(1(0(2(1(0(1(1(2(1(x1)))))))))) 1(2(1(0(x1)))) -> 2(1(0(2(1(0(2(1(0(1(1(2(1(x1))))))))))))) 1(2(1(0(x1)))) -> 2(1(0(2(1(0(2(1(0(2(1(0(1(1(2(1(x1)))))))))))))))) 1(2(1(0(x1)))) -> 2(1(0(2(1(0(2(1(0(2(1(0(2(1(0(1(1(2(1(x1))))))))))))))))))) 1(2(1(0(x1)))) -> 2(1(0(2(1(0(2(1(0(2(1(0(2(1(0(2(1(0(1(1(2(1(x1)))))))))))))))))))))) 1(2(1(0(x1)))) -> 2(1(0(2(1(0(2(1(0(2(1(0(2(1(0(2(1(0(2(1(0(1(1(2(1(x1))))))))))))))))))))))))) 1(2(1(0(x1)))) -> 2(1(0(2(1(0(2(1(0(2(1(0(2(1(0(2(1(0(2(1(0(2(1(0(1(1(2(1(x1)))))))))))))))))))))))))))) 1(2(1(0(x1)))) -> 2(1(0(2(1(0(2(1(0(2(1(0(2(1(0(2(1(0(2(1(0(2(1(0(2(1(0(1(1(2(1(x1))))))))))))))))))))))))))))))) Bounds Processor: bound: 2 enrichment: match automaton: final states: {30,27,24,21,18,15,12,1} transitions: 21(50) -> 51* 21(45) -> 46* 21(79) -> 80* 21(76) -> 77* 21(71) -> 72* 21(53) -> 54* 11(75) -> 76* 11(70) -> 71* 11(127) -> 128* 11(72) -> 73* 11(52) -> 53* 11(47) -> 48* 11(139) -> 140* 11(49) -> 50* 11(44) -> 45* 11(131) -> 132* 11(121) -> 122* 11(46) -> 47* 11(143) -> 144* 11(123) -> 124* 11(78) -> 79* 11(73) -> 74* 11(135) -> 136* 01(55) -> 56* 01(77) -> 78* 01(74) -> 75* 01(81) -> 82* 01(51) -> 52* 01(48) -> 49* 22(102) -> 103* 22(97) -> 98* 22(105) -> 106* 12(117) -> 118* 12(107) -> 108* 12(104) -> 105* 12(99) -> 100* 12(101) -> 102* 12(96) -> 97* 12(98) -> 99* f30() -> 2* 02(113) -> 114* 02(103) -> 104* 02(100) -> 101* 20(20) -> 18* 20(32) -> 30* 20(17) -> 15* 20(29) -> 27* 20(14) -> 12* 20(26) -> 24* 20(11) -> 1* 20(23) -> 21* 20(8) -> 9* 20(3) -> 4* 10(25) -> 26* 10(10) -> 11* 10(5) -> 6* 10(22) -> 23* 10(7) -> 8* 10(2) -> 3* 10(19) -> 20* 10(4) -> 5* 10(31) -> 32* 10(16) -> 17* 10(28) -> 29* 10(13) -> 14* 00(15) -> 19* 00(27) -> 31* 00(12) -> 16* 00(24) -> 28* 00(9) -> 10* 00(21) -> 25* 00(6) -> 7* 00(1) -> 13* 00(18) -> 22* 1 -> 121,3,5 6 -> 70* 9 -> 44* 12 -> 123,3,5 15 -> 127,3,5 18 -> 131,3,5 21 -> 135,3,5 24 -> 139,3,5 27 -> 143,3,5 30 -> 3,5 48 -> 117* 51 -> 107* 54 -> 144,140,136,132,128,124,122,55,6 55 -> 96* 56 -> 52* 80 -> 81,45 82 -> 78* 106 -> 108,97,113,71 108 -> 97* 114 -> 104* 118 -> 97* 122 -> 45* 124 -> 45* 128 -> 45* 132 -> 45* 136 -> 45* 140 -> 45* 144 -> 45* problem: Qed