YES
by ttt2 (version ttt2 1.15)
The rewrite relation of the following TRS is considered.
| a(b(a(a(a(a(b(x0))))))) | → | b(a(a(a(a(b(b(a(a(a(a(b(a(x0))))))))))))) | 
final states:
{1}
transitions:
| 322 | → | 268 | 
| 280 | → | 254 | 
| 98 | → | 30 | 
| 3 | → | 85 | 
| 50 | → | 99 | 
| 218 | → | 365 | 
| 9 | → | 29 | 
| 224 | → | 198 | 
| 1 | → | 5 | 
| 1 | → | 3 | 
| 1 | → | 382 | 
| 1 | → | 214 | 
| 1 | → | 88 | 
| 392 | → | 366 | 
| 44 | → | 155 | 
| 86 | → | 211 | 
| 36 | → | 43 | 
| 36 | → | 407 | 
| 336 | → | 310 | 
| 204 | → | 309 | 
| 212 | → | 379 | 
| 112 | → | 8 | 
| 30 | → | 141 | 
| 42 | → | 6 | 
| 42 | → | 86 | 
| 42 | → | 383 | 
| 42 | → | 215 | 
| 42 | → | 89 | 
| 434 | → | 380 | 
| 434 | → | 385 | 
| 434 | → | 217 | 
| 434 | → | 91 | 
| 414 | → | 421 | 
| 198 | → | 323 | 
| 154 | → | 44 | 
| 154 | → | 408 | 
| 168 | → | 100 | 
| 462 | → | 422 | 
| 148 | → | 253 | 
| 142 | → | 267 | 
| 378 | → | 324 | 
| 92 | → | 197 | 
| 266 | → | 156 | 
| 266 | → | 450 | 
| 210 | → | 142 | 
| 56 | → | 7 | 
| 408 | → | 449 | 
| 420 | → | 212 | 
| 420 | → | 384 | 
| 420 | → | 216 | 
| 420 | → | 90 | 
| b3(279) | → | 280 | 
| b3(427) | → | 428 | 
| b3(254) | → | 255 | 
| b3(260) | → | 261 | 
| b3(456) | → | 457 | 
| b3(371) | → | 372 | 
| b3(310) | → | 311 | 
| b3(372) | → | 373 | 
| b3(316) | → | 317 | 
| b3(380) | → | 381 | 
| b3(461) | → | 462 | 
| b3(335) | → | 336 | 
| b3(366) | → | 367 | 
| b3(321) | → | 322 | 
| b3(273) | → | 274 | 
| b3(268) | → | 269 | 
| b3(377) | → | 378 | 
| b3(433) | → | 434 | 
| b3(315) | → | 316 | 
| b3(324) | → | 325 | 
| b3(428) | → | 429 | 
| b3(274) | → | 275 | 
| b3(450) | → | 451 | 
| b3(386) | → | 387 | 
| b3(455) | → | 456 | 
| b3(391) | → | 392 | 
| b3(265) | → | 266 | 
| b3(259) | → | 260 | 
| b3(330) | → | 331 | 
| b3(329) | → | 330 | 
| b3(385) | → | 386 | 
| b3(422) | → | 423 | 
| a3(331) | → | 332 | 
| a3(323) | → | 324 | 
| a3(255) | → | 256 | 
| a3(373) | → | 374 | 
| a3(269) | → | 270 | 
| a3(388) | → | 389 | 
| a3(311) | → | 312 | 
| a3(261) | → | 262 | 
| a3(275) | → | 276 | 
| a3(451) | → | 452 | 
| a3(458) | → | 459 | 
| a3(326) | → | 327 | 
| a3(375) | → | 376 | 
| a3(429) | → | 430 | 
| a3(318) | → | 319 | 
| a3(389) | → | 390 | 
| a3(319) | → | 320 | 
| a3(423) | → | 424 | 
| a3(309) | → | 310 | 
| a3(382) | → | 383 | 
| a3(263) | → | 264 | 
| a3(431) | → | 432 | 
| a3(369) | → | 370 | 
| a3(379) | → | 380 | 
| a3(383) | → | 384 | 
| a3(376) | → | 377 | 
| a3(267) | → | 268 | 
| a3(325) | → | 326 | 
| a3(317) | → | 318 | 
| a3(426) | → | 427 | 
| a3(454) | → | 455 | 
| a3(258) | → | 259 | 
| a3(453) | → | 454 | 
| a3(332) | → | 333 | 
| a3(374) | → | 375 | 
| a3(333) | → | 334 | 
| a3(387) | → | 388 | 
| a3(421) | → | 422 | 
| a3(270) | → | 271 | 
| a3(334) | → | 335 | 
| a3(457) | → | 458 | 
| a3(390) | → | 391 | 
| a3(253) | → | 254 | 
| a3(277) | → | 278 | 
| a3(276) | → | 277 | 
| a3(367) | → | 368 | 
| a3(320) | → | 321 | 
| a3(257) | → | 258 | 
| a3(460) | → | 461 | 
| a3(262) | → | 263 | 
| a3(424) | → | 425 | 
| a3(313) | → | 314 | 
| a3(365) | → | 366 | 
| a3(384) | → | 385 | 
| a3(314) | → | 315 | 
| a3(459) | → | 460 | 
| a3(449) | → | 450 | 
| a3(256) | → | 257 | 
| a3(328) | → | 329 | 
| a3(327) | → | 328 | 
| a3(271) | → | 272 | 
| a3(430) | → | 431 | 
| a3(370) | → | 371 | 
| a3(312) | → | 313 | 
| a3(264) | → | 265 | 
| a3(381) | → | 382 | 
| a3(368) | → | 369 | 
| a3(278) | → | 279 | 
| a3(452) | → | 453 | 
| a3(425) | → | 426 | 
| a3(432) | → | 433 | 
| a3(272) | → | 273 | 
| a2(151) | → | 152 | 
| a2(219) | → | 220 | 
| a2(206) | → | 207 | 
| a2(150) | → | 151 | 
| a2(165) | → | 166 | 
| a2(200) | → | 201 | 
| a2(412) | → | 413 | 
| a2(216) | → | 217 | 
| a2(159) | → | 160 | 
| a2(144) | → | 145 | 
| a2(160) | → | 161 | 
| a2(199) | → | 200 | 
| a2(166) | → | 167 | 
| a2(207) | → | 208 | 
| a2(418) | → | 419 | 
| a2(205) | → | 206 | 
| a2(409) | → | 410 | 
| a2(143) | → | 144 | 
| a2(220) | → | 221 | 
| a2(213) | → | 214 | 
| a2(152) | → | 153 | 
| a2(149) | → | 150 | 
| a2(155) | → | 156 | 
| a2(158) | → | 159 | 
| a2(201) | → | 202 | 
| a2(202) | → | 203 | 
| a2(197) | → | 198 | 
| a2(222) | → | 223 | 
| a2(164) | → | 165 | 
| a2(416) | → | 417 | 
| a2(407) | → | 408 | 
| a2(221) | → | 222 | 
| a2(415) | → | 416 | 
| a2(163) | → | 164 | 
| a2(145) | → | 146 | 
| a2(146) | → | 147 | 
| a2(208) | → | 209 | 
| a2(215) | → | 216 | 
| a2(410) | → | 411 | 
| a2(411) | → | 412 | 
| a2(141) | → | 142 | 
| a2(214) | → | 215 | 
| a2(417) | → | 418 | 
| a2(211) | → | 212 | 
| a2(157) | → | 158 | 
| b0(3) | → | 4 | 
| b0(8) | → | 9 | 
| b0(14) | → | 1 | 
| b0(9) | → | 10 | 
| a0(5) | → | 6 | 
| a0(7) | → | 8 | 
| a0(10) | → | 11 | 
| a0(2) | → | 3 | 
| a0(12) | → | 13 | 
| a0(6) | → | 7 | 
| a0(4) | → | 5 | 
| a0(11) | → | 12 | 
| a0(13) | → | 14 | 
| f20 | → | 2 | 
| a1(96) | → | 97 | 
| a1(104) | → | 105 | 
| a1(37) | → | 38 | 
| a1(93) | → | 94 | 
| a1(51) | → | 52 | 
| a1(40) | → | 41 | 
| a1(29) | → | 30 | 
| a1(101) | → | 102 | 
| a1(88) | → | 89 | 
| a1(39) | → | 40 | 
| a1(54) | → | 55 | 
| a1(95) | → | 96 | 
| a1(94) | → | 95 | 
| a1(38) | → | 39 | 
| a1(107) | → | 108 | 
| a1(53) | → | 54 | 
| a1(85) | → | 86 | 
| a1(31) | → | 32 | 
| a1(45) | → | 46 | 
| a1(52) | → | 53 | 
| a1(108) | → | 109 | 
| a1(43) | → | 44 | 
| a1(99) | → | 100 | 
| a1(48) | → | 49 | 
| a1(103) | → | 104 | 
| a1(34) | → | 35 | 
| a1(90) | → | 91 | 
| a1(109) | → | 110 | 
| a1(33) | → | 34 | 
| a1(110) | → | 111 | 
| a1(47) | → | 48 | 
| a1(46) | → | 47 | 
| a1(32) | → | 33 | 
| a1(87) | → | 88 | 
| a1(102) | → | 103 | 
| a1(89) | → | 90 | 
| b2(167) | → | 168 | 
| b2(156) | → | 157 | 
| b2(414) | → | 415 | 
| b2(204) | → | 205 | 
| b2(217) | → | 218 | 
| b2(408) | → | 409 | 
| b2(223) | → | 224 | 
| b2(147) | → | 148 | 
| b2(218) | → | 219 | 
| b2(203) | → | 204 | 
| b2(198) | → | 199 | 
| b2(161) | → | 162 | 
| b2(419) | → | 420 | 
| b2(413) | → | 414 | 
| b2(142) | → | 143 | 
| b2(212) | → | 213 | 
| b2(209) | → | 210 | 
| b2(162) | → | 163 | 
| b2(148) | → | 149 | 
| b2(153) | → | 154 | 
| b1(44) | → | 45 | 
| b1(97) | → | 98 | 
| b1(100) | → | 101 | 
| b1(41) | → | 42 | 
| b1(105) | → | 106 | 
| b1(86) | → | 87 | 
| b1(106) | → | 107 | 
| b1(55) | → | 56 | 
| b1(92) | → | 93 | 
| b1(91) | → | 92 | 
| b1(35) | → | 36 | 
| b1(111) | → | 112 | 
| b1(49) | → | 50 | 
| b1(36) | → | 37 | 
| b1(30) | → | 31 | 
| b1(50) | → | 51 |