Certification Problem

Input (TPDB SRS_Relative/Waldmann_19/random-123)

The rewrite relation of the following TRS is considered.

b(c(b(x1))) → a(b(a(x1))) (1)
b(b(a(x1))) → a(c(c(x1))) (2)
a(b(a(x1))) → b(c(c(x1))) (3)
a(b(c(x1))) → a(b(b(x1))) (4)
a(b(c(x1))) → b(b(c(x1))) (5)
b(b(a(x1))) → b(a(b(x1))) (6)

Property / Task

Prove or disprove termination.

Answer / Result

Yes.

Proof (by matchbox @ termCOMP 2023)

1 Split

We split R in the relative problem D/R-D and R-D, where the rules D

b(b(a(x1))) → a(c(c(x1))) (2)
a(b(c(x1))) → b(b(c(x1))) (5)
are deleted.

1.1 Closure Under Flat Contexts

Using the flat contexts

{c(☐), b(☐), a(☐)}

We obtain the transformed TRS
c(b(b(a(x1)))) → c(a(c(c(x1)))) (7)
c(a(b(c(x1)))) → c(b(b(c(x1)))) (8)
b(b(b(a(x1)))) → b(a(c(c(x1)))) (9)
b(a(b(c(x1)))) → b(b(b(c(x1)))) (10)
a(b(b(a(x1)))) → a(a(c(c(x1)))) (11)
a(a(b(c(x1)))) → a(b(b(c(x1)))) (12)
c(b(c(b(x1)))) → c(a(b(a(x1)))) (13)
c(a(b(a(x1)))) → c(b(c(c(x1)))) (14)
c(a(b(c(x1)))) → c(a(b(b(x1)))) (15)
c(b(b(a(x1)))) → c(b(a(b(x1)))) (16)
b(b(c(b(x1)))) → b(a(b(a(x1)))) (17)
b(a(b(a(x1)))) → b(b(c(c(x1)))) (18)
b(a(b(c(x1)))) → b(a(b(b(x1)))) (19)
b(b(b(a(x1)))) → b(b(a(b(x1)))) (20)
a(b(c(b(x1)))) → a(a(b(a(x1)))) (21)
a(a(b(a(x1)))) → a(b(c(c(x1)))) (22)
a(a(b(c(x1)))) → a(a(b(b(x1)))) (23)
a(b(b(a(x1)))) → a(b(a(b(x1)))) (24)

1.1.1 Closure Under Flat Contexts

Using the flat contexts

{c(☐), b(☐), a(☐)}

We obtain the transformed TRS
c(c(b(b(a(x1))))) → c(c(a(c(c(x1))))) (25)
c(c(a(b(c(x1))))) → c(c(b(b(c(x1))))) (26)
c(b(b(b(a(x1))))) → c(b(a(c(c(x1))))) (27)
c(b(a(b(c(x1))))) → c(b(b(b(c(x1))))) (28)
c(a(b(b(a(x1))))) → c(a(a(c(c(x1))))) (29)
c(a(a(b(c(x1))))) → c(a(b(b(c(x1))))) (30)
b(c(b(b(a(x1))))) → b(c(a(c(c(x1))))) (31)
b(c(a(b(c(x1))))) → b(c(b(b(c(x1))))) (32)
b(b(b(b(a(x1))))) → b(b(a(c(c(x1))))) (33)
b(b(a(b(c(x1))))) → b(b(b(b(c(x1))))) (34)
b(a(b(b(a(x1))))) → b(a(a(c(c(x1))))) (35)
b(a(a(b(c(x1))))) → b(a(b(b(c(x1))))) (36)
a(c(b(b(a(x1))))) → a(c(a(c(c(x1))))) (37)
a(c(a(b(c(x1))))) → a(c(b(b(c(x1))))) (38)
a(b(b(b(a(x1))))) → a(b(a(c(c(x1))))) (39)
a(b(a(b(c(x1))))) → a(b(b(b(c(x1))))) (40)
a(a(b(b(a(x1))))) → a(a(a(c(c(x1))))) (41)
a(a(a(b(c(x1))))) → a(a(b(b(c(x1))))) (42)
c(c(b(c(b(x1))))) → c(c(a(b(a(x1))))) (43)
c(c(a(b(a(x1))))) → c(c(b(c(c(x1))))) (44)
c(c(a(b(c(x1))))) → c(c(a(b(b(x1))))) (45)
c(c(b(b(a(x1))))) → c(c(b(a(b(x1))))) (46)
c(b(b(c(b(x1))))) → c(b(a(b(a(x1))))) (47)
c(b(a(b(a(x1))))) → c(b(b(c(c(x1))))) (48)
c(b(a(b(c(x1))))) → c(b(a(b(b(x1))))) (49)
c(b(b(b(a(x1))))) → c(b(b(a(b(x1))))) (50)
c(a(b(c(b(x1))))) → c(a(a(b(a(x1))))) (51)
c(a(a(b(a(x1))))) → c(a(b(c(c(x1))))) (52)
c(a(a(b(c(x1))))) → c(a(a(b(b(x1))))) (53)
c(a(b(b(a(x1))))) → c(a(b(a(b(x1))))) (54)
b(c(b(c(b(x1))))) → b(c(a(b(a(x1))))) (55)
b(c(a(b(a(x1))))) → b(c(b(c(c(x1))))) (56)
b(c(a(b(c(x1))))) → b(c(a(b(b(x1))))) (57)
b(c(b(b(a(x1))))) → b(c(b(a(b(x1))))) (58)
b(b(b(c(b(x1))))) → b(b(a(b(a(x1))))) (59)
b(b(a(b(a(x1))))) → b(b(b(c(c(x1))))) (60)
b(b(a(b(c(x1))))) → b(b(a(b(b(x1))))) (61)
b(b(b(b(a(x1))))) → b(b(b(a(b(x1))))) (62)
b(a(b(c(b(x1))))) → b(a(a(b(a(x1))))) (63)
b(a(a(b(a(x1))))) → b(a(b(c(c(x1))))) (64)
b(a(a(b(c(x1))))) → b(a(a(b(b(x1))))) (65)
b(a(b(b(a(x1))))) → b(a(b(a(b(x1))))) (66)
a(c(b(c(b(x1))))) → a(c(a(b(a(x1))))) (67)
a(c(a(b(a(x1))))) → a(c(b(c(c(x1))))) (68)
a(c(a(b(c(x1))))) → a(c(a(b(b(x1))))) (69)
a(c(b(b(a(x1))))) → a(c(b(a(b(x1))))) (70)
a(b(b(c(b(x1))))) → a(b(a(b(a(x1))))) (71)
a(b(a(b(a(x1))))) → a(b(b(c(c(x1))))) (72)
a(b(a(b(c(x1))))) → a(b(a(b(b(x1))))) (73)
a(b(b(b(a(x1))))) → a(b(b(a(b(x1))))) (74)
a(a(b(c(b(x1))))) → a(a(a(b(a(x1))))) (75)
a(a(a(b(a(x1))))) → a(a(b(c(c(x1))))) (76)
a(a(a(b(c(x1))))) → a(a(a(b(b(x1))))) (77)
a(a(b(b(a(x1))))) → a(a(b(a(b(x1))))) (78)

1.1.1.1 Semantic Labeling

The following interpretations form a model of the rules.

As carrier we take the set {0,...,8}. Symbols are labeled by the interpretation of their arguments using the interpretations (modulo 9):

[c(x1)] = 3x1 + 0
[b(x1)] = 3x1 + 1
[a(x1)] = 3x1 + 2

We obtain the labeled TRS

There are 486 ruless (increase limit for explicit display).

1.1.1.1.1 Rule Removal

Using the matrix interpretations of dimension 1 with strict dimension 1 over the rationals with delta = 1
[c0(x1)] = x1 +
0
[c3(x1)] = x1 +
0
[c6(x1)] = x1 +
0
[c1(x1)] = x1 +
1
[c4(x1)] = x1 +
0
[c7(x1)] = x1 +
0
[c2(x1)] = x1 +
1
[c5(x1)] = x1 +
1
[c8(x1)] = x1 +
1
[b0(x1)] = x1 +
1
[b3(x1)] = x1 +
5
[b6(x1)] = x1 +
5
[b1(x1)] = x1 +
1
[b4(x1)] = x1 +
4
[b7(x1)] = x1 +
4
[b2(x1)] = x1 +
4
[b5(x1)] = x1 +
1
[b8(x1)] = x1 +
1
[a0(x1)] = x1 +
0
[a3(x1)] = x1 +
4
[a6(x1)] = x1 +
4
[a1(x1)] = x1 +
5
[a4(x1)] = x1 +
0
[a7(x1)] = x1 +
0
[a2(x1)] = x1 +
2
[a5(x1)] = x1 +
5
[a8(x1)] = x1 +
5
all of the following rules can be deleted.

There are 405 ruless (increase limit for explicit display).

1.1.1.1.1.1 R is empty

There are no rules in the TRS. Hence, it is terminating.

1.2 Split

We split R in the relative problem D/R-D and R-D, where the rules D

b(b(a(x1))) → b(a(b(x1))) (6)
are deleted.

1.2.1 Closure Under Flat Contexts

Using the flat contexts

{c(☐), b(☐), a(☐)}

We obtain the transformed TRS
c(b(b(a(x1)))) → c(b(a(b(x1)))) (16)
b(b(b(a(x1)))) → b(b(a(b(x1)))) (20)
a(b(b(a(x1)))) → a(b(a(b(x1)))) (24)
c(b(c(b(x1)))) → c(a(b(a(x1)))) (13)
c(a(b(a(x1)))) → c(b(c(c(x1)))) (14)
c(a(b(c(x1)))) → c(a(b(b(x1)))) (15)
b(b(c(b(x1)))) → b(a(b(a(x1)))) (17)
b(a(b(a(x1)))) → b(b(c(c(x1)))) (18)
b(a(b(c(x1)))) → b(a(b(b(x1)))) (19)
a(b(c(b(x1)))) → a(a(b(a(x1)))) (21)
a(a(b(a(x1)))) → a(b(c(c(x1)))) (22)
a(a(b(c(x1)))) → a(a(b(b(x1)))) (23)

1.2.1.1 Closure Under Flat Contexts

Using the flat contexts

{c(☐), b(☐), a(☐)}

We obtain the transformed TRS
c(c(b(b(a(x1))))) → c(c(b(a(b(x1))))) (46)
c(b(b(b(a(x1))))) → c(b(b(a(b(x1))))) (50)
c(a(b(b(a(x1))))) → c(a(b(a(b(x1))))) (54)
b(c(b(b(a(x1))))) → b(c(b(a(b(x1))))) (58)
b(b(b(b(a(x1))))) → b(b(b(a(b(x1))))) (62)
b(a(b(b(a(x1))))) → b(a(b(a(b(x1))))) (66)
a(c(b(b(a(x1))))) → a(c(b(a(b(x1))))) (70)
a(b(b(b(a(x1))))) → a(b(b(a(b(x1))))) (74)
a(a(b(b(a(x1))))) → a(a(b(a(b(x1))))) (78)
c(c(b(c(b(x1))))) → c(c(a(b(a(x1))))) (43)
c(c(a(b(a(x1))))) → c(c(b(c(c(x1))))) (44)
c(c(a(b(c(x1))))) → c(c(a(b(b(x1))))) (45)
c(b(b(c(b(x1))))) → c(b(a(b(a(x1))))) (47)
c(b(a(b(a(x1))))) → c(b(b(c(c(x1))))) (48)
c(b(a(b(c(x1))))) → c(b(a(b(b(x1))))) (49)
c(a(b(c(b(x1))))) → c(a(a(b(a(x1))))) (51)
c(a(a(b(a(x1))))) → c(a(b(c(c(x1))))) (52)
c(a(a(b(c(x1))))) → c(a(a(b(b(x1))))) (53)
b(c(b(c(b(x1))))) → b(c(a(b(a(x1))))) (55)
b(c(a(b(a(x1))))) → b(c(b(c(c(x1))))) (56)
b(c(a(b(c(x1))))) → b(c(a(b(b(x1))))) (57)
b(b(b(c(b(x1))))) → b(b(a(b(a(x1))))) (59)
b(b(a(b(a(x1))))) → b(b(b(c(c(x1))))) (60)
b(b(a(b(c(x1))))) → b(b(a(b(b(x1))))) (61)
b(a(b(c(b(x1))))) → b(a(a(b(a(x1))))) (63)
b(a(a(b(a(x1))))) → b(a(b(c(c(x1))))) (64)
b(a(a(b(c(x1))))) → b(a(a(b(b(x1))))) (65)
a(c(b(c(b(x1))))) → a(c(a(b(a(x1))))) (67)
a(c(a(b(a(x1))))) → a(c(b(c(c(x1))))) (68)
a(c(a(b(c(x1))))) → a(c(a(b(b(x1))))) (69)
a(b(b(c(b(x1))))) → a(b(a(b(a(x1))))) (71)
a(b(a(b(a(x1))))) → a(b(b(c(c(x1))))) (72)
a(b(a(b(c(x1))))) → a(b(a(b(b(x1))))) (73)
a(a(b(c(b(x1))))) → a(a(a(b(a(x1))))) (75)
a(a(a(b(a(x1))))) → a(a(b(c(c(x1))))) (76)
a(a(a(b(c(x1))))) → a(a(a(b(b(x1))))) (77)

1.2.1.1.1 Semantic Labeling

The following interpretations form a model of the rules.

As carrier we take the set {0,...,8}. Symbols are labeled by the interpretation of their arguments using the interpretations (modulo 9):

[c(x1)] = 3x1 + 0
[b(x1)] = 3x1 + 1
[a(x1)] = 3x1 + 2

We obtain the labeled TRS

There are 324 ruless (increase limit for explicit display).

1.2.1.1.1.1 Rule Removal

Using the matrix interpretations of dimension 1 with strict dimension 1 over the rationals with delta = 1
[c0(x1)] = x1 +
0
[c3(x1)] = x1 +
0
[c6(x1)] = x1 +
0
[c1(x1)] = x1 +
6
[c4(x1)] = x1 +
1/2
[c7(x1)] = x1 +
1/2
[c2(x1)] = x1 +
1
[c5(x1)] = x1 +
6
[c8(x1)] = x1 +
6
[b0(x1)] = x1 +
1
[b3(x1)] = x1 +
6
[b6(x1)] = x1 +
6
[b1(x1)] = x1 +
3/2
[b4(x1)] = x1 +
5
[b7(x1)] = x1 +
5
[b2(x1)] = x1 +
5
[b5(x1)] = x1 +
3/2
[b8(x1)] = x1 +
3/2
[a0(x1)] = x1 +
5
[a3(x1)] = x1 +
5
[a6(x1)] = x1 +
5
[a1(x1)] = x1 +
13/2
[a4(x1)] = x1 +
0
[a7(x1)] = x1 +
0
[a2(x1)] = x1 +
5
[a5(x1)] = x1 +
13/2
[a8(x1)] = x1 +
13/2
all of the following rules can be deleted.

There are 243 ruless (increase limit for explicit display).

1.2.1.1.1.1.1 Rule Removal

Using the matrix interpretations of dimension 1 with strict dimension 1 over the naturals
[c3(x1)] =
2
· x1 +
0
[c6(x1)] =
2
· x1 +
0
[c1(x1)] =
2
· x1 +
1
[c4(x1)] =
2
· x1 +
1
[c7(x1)] =
2
· x1 +
1
[c5(x1)] =
2
· x1 +
1
[c8(x1)] =
1
· x1 +
1
[b0(x1)] =
2
· x1 +
1
[b3(x1)] =
1
· x1 +
0
[b6(x1)] =
1
· x1 +
0
[b1(x1)] =
2
· x1 +
0
[b4(x1)] =
2
· x1 +
0
[b7(x1)] =
2
· x1 +
0
[b5(x1)] =
2
· x1 +
0
[b8(x1)] =
1
· x1 +
0
[a3(x1)] =
1
· x1 +
1
[a6(x1)] =
1
· x1 +
1
[a1(x1)] =
1
· x1 +
0
[a4(x1)] =
2
· x1 +
1
[a7(x1)] =
2
· x1 +
1
[a5(x1)] =
2
· x1 +
0
[a8(x1)] =
1
· x1 +
0
all of the following rules can be deleted.
b4(b4(b7(b5(a4(x1))))) → b4(b7(b5(a4(b4(x1))))) (484)
b4(b4(b7(b5(a7(x1))))) → b4(b7(b5(a4(b7(x1))))) (486)
b3(c4(b7(b5(a4(x1))))) → b3(c7(b5(a4(b4(x1))))) (493)
b3(c4(b7(b5(a7(x1))))) → b3(c7(b5(a4(b7(x1))))) (495)
b5(a4(b7(b5(a4(x1))))) → b5(a7(b5(a4(b4(x1))))) (502)
b5(a4(b7(b5(a7(x1))))) → b5(a7(b5(a4(b7(x1))))) (504)
c4(b4(b7(b5(a4(x1))))) → c4(b7(b5(a4(b4(x1))))) (511)
c4(b4(b7(b5(a7(x1))))) → c4(b7(b5(a4(b7(x1))))) (513)
c3(c4(b7(b5(a4(x1))))) → c3(c7(b5(a4(b4(x1))))) (520)
c3(c4(b7(b5(a7(x1))))) → c3(c7(b5(a4(b7(x1))))) (522)
c5(a4(b7(b5(a4(x1))))) → c5(a7(b5(a4(b4(x1))))) (529)
c5(a4(b7(b5(a7(x1))))) → c5(a7(b5(a4(b7(x1))))) (531)
a4(b4(b7(b5(a4(x1))))) → a4(b7(b5(a4(b4(x1))))) (538)
a4(b4(b7(b5(a7(x1))))) → a4(b7(b5(a4(b7(x1))))) (540)
a3(c4(b7(b5(a4(x1))))) → a3(c7(b5(a4(b4(x1))))) (547)
a3(c4(b7(b5(a7(x1))))) → a3(c7(b5(a4(b7(x1))))) (549)
a5(a4(b7(b5(a4(x1))))) → a5(a7(b5(a4(b4(x1))))) (556)
a5(a4(b7(b5(a7(x1))))) → a5(a7(b5(a4(b7(x1))))) (558)

1.2.1.1.1.1.1.1 R is empty

There are no rules in the TRS. Hence, it is terminating.

1.2.2 Closure Under Flat Contexts

Using the flat contexts

{c(☐), b(☐), a(☐)}

We obtain the transformed TRS
c(b(c(b(x1)))) → c(a(b(a(x1)))) (13)
c(a(b(a(x1)))) → c(b(c(c(x1)))) (14)
c(a(b(c(x1)))) → c(a(b(b(x1)))) (15)
b(b(c(b(x1)))) → b(a(b(a(x1)))) (17)
b(a(b(a(x1)))) → b(b(c(c(x1)))) (18)
b(a(b(c(x1)))) → b(a(b(b(x1)))) (19)
a(b(c(b(x1)))) → a(a(b(a(x1)))) (21)
a(a(b(a(x1)))) → a(b(c(c(x1)))) (22)
a(a(b(c(x1)))) → a(a(b(b(x1)))) (23)

1.2.2.1 Semantic Labeling

The following interpretations form a model of the rules.

As carrier we take the set {0,1,2}. Symbols are labeled by the interpretation of their arguments using the interpretations (modulo 3):

[c(x1)] = 3x1 + 0
[b(x1)] = 3x1 + 1
[a(x1)] = 3x1 + 2

We obtain the labeled TRS
b1(b0(c1(b1(x1)))) → b2(a1(b2(a1(x1)))) (565)
b1(b0(c1(b0(x1)))) → b2(a1(b2(a0(x1)))) (566)
b1(b0(c1(b2(x1)))) → b2(a1(b2(a2(x1)))) (567)
c1(b0(c1(b1(x1)))) → c2(a1(b2(a1(x1)))) (568)
c1(b0(c1(b0(x1)))) → c2(a1(b2(a0(x1)))) (569)
c1(b0(c1(b2(x1)))) → c2(a1(b2(a2(x1)))) (570)
a1(b0(c1(b1(x1)))) → a2(a1(b2(a1(x1)))) (571)
a1(b0(c1(b0(x1)))) → a2(a1(b2(a0(x1)))) (572)
a1(b0(c1(b2(x1)))) → a2(a1(b2(a2(x1)))) (573)
b2(a1(b2(a1(x1)))) → b1(b0(c0(c1(x1)))) (574)
b2(a1(b2(a0(x1)))) → b1(b0(c0(c0(x1)))) (575)
b2(a1(b2(a2(x1)))) → b1(b0(c0(c2(x1)))) (576)
c2(a1(b2(a1(x1)))) → c1(b0(c0(c1(x1)))) (577)
c2(a1(b2(a0(x1)))) → c1(b0(c0(c0(x1)))) (578)
c2(a1(b2(a2(x1)))) → c1(b0(c0(c2(x1)))) (579)
a2(a1(b2(a1(x1)))) → a1(b0(c0(c1(x1)))) (580)
a2(a1(b2(a0(x1)))) → a1(b0(c0(c0(x1)))) (581)
a2(a1(b2(a2(x1)))) → a1(b0(c0(c2(x1)))) (582)
b2(a1(b0(c1(x1)))) → b2(a1(b1(b1(x1)))) (583)
b2(a1(b0(c0(x1)))) → b2(a1(b1(b0(x1)))) (584)
b2(a1(b0(c2(x1)))) → b2(a1(b1(b2(x1)))) (585)
c2(a1(b0(c1(x1)))) → c2(a1(b1(b1(x1)))) (586)
c2(a1(b0(c0(x1)))) → c2(a1(b1(b0(x1)))) (587)
c2(a1(b0(c2(x1)))) → c2(a1(b1(b2(x1)))) (588)
a2(a1(b0(c1(x1)))) → a2(a1(b1(b1(x1)))) (589)
a2(a1(b0(c0(x1)))) → a2(a1(b1(b0(x1)))) (590)
a2(a1(b0(c2(x1)))) → a2(a1(b1(b2(x1)))) (591)

1.2.2.1.1 Rule Removal

Using the matrix interpretations of dimension 1 with strict dimension 1 over the rationals with delta = 1
[c0(x1)] = x1 +
0
[c1(x1)] = x1 +
1
[c2(x1)] = x1 +
1
[b0(x1)] = x1 +
1
[b1(x1)] = x1 +
0
[b2(x1)] = x1 +
0
[a0(x1)] = x1 +
1
[a1(x1)] = x1 +
1
[a2(x1)] = x1 +
1
all of the following rules can be deleted.
b1(b0(c1(b0(x1)))) → b2(a1(b2(a0(x1)))) (566)
c1(b0(c1(b0(x1)))) → c2(a1(b2(a0(x1)))) (569)
a1(b0(c1(b0(x1)))) → a2(a1(b2(a0(x1)))) (572)
b2(a1(b2(a0(x1)))) → b1(b0(c0(c0(x1)))) (575)
c2(a1(b2(a0(x1)))) → c1(b0(c0(c0(x1)))) (578)
a2(a1(b2(a0(x1)))) → a1(b0(c0(c0(x1)))) (581)
b2(a1(b0(c1(x1)))) → b2(a1(b1(b1(x1)))) (583)
b2(a1(b0(c2(x1)))) → b2(a1(b1(b2(x1)))) (585)
c2(a1(b0(c1(x1)))) → c2(a1(b1(b1(x1)))) (586)
c2(a1(b0(c2(x1)))) → c2(a1(b1(b2(x1)))) (588)
a2(a1(b0(c1(x1)))) → a2(a1(b1(b1(x1)))) (589)
a2(a1(b0(c2(x1)))) → a2(a1(b1(b2(x1)))) (591)

1.2.2.1.1.1 Rule Removal

Using the matrix interpretations of dimension 1 with strict dimension 1 over the naturals
[c0(x1)] =
1
· x1 +
1
[c1(x1)] =
2
· x1 +
0
[c2(x1)] =
2
· x1 +
0
[b0(x1)] =
2
· x1 +
0
[b1(x1)] =
1
· x1 +
1
[b2(x1)] =
1
· x1 +
1
[a1(x1)] =
2
· x1 +
0
[a2(x1)] =
2
· x1 +
0
all of the following rules can be deleted.
b1(b0(c1(b1(x1)))) → b2(a1(b2(a1(x1)))) (565)
b1(b0(c1(b2(x1)))) → b2(a1(b2(a2(x1)))) (567)
c1(b0(c1(b1(x1)))) → c2(a1(b2(a1(x1)))) (568)
c1(b0(c1(b2(x1)))) → c2(a1(b2(a2(x1)))) (570)
a1(b0(c1(b1(x1)))) → a2(a1(b2(a1(x1)))) (571)
a1(b0(c1(b2(x1)))) → a2(a1(b2(a2(x1)))) (573)
b2(a1(b0(c0(x1)))) → b2(a1(b1(b0(x1)))) (584)
c2(a1(b0(c0(x1)))) → c2(a1(b1(b0(x1)))) (587)
a2(a1(b0(c0(x1)))) → a2(a1(b1(b0(x1)))) (590)

1.2.2.1.1.1.1 Rule Removal

Using the matrix interpretations of dimension 1 with strict dimension 1 over the rationals with delta = 1
[c0(x1)] = x1 +
0
[c1(x1)] = x1 +
0
[c2(x1)] = x1 +
0
[b0(x1)] = x1 +
0
[b1(x1)] = x1 +
0
[b2(x1)] = x1 +
1
[a1(x1)] = x1 +
1
[a2(x1)] = x1 +
1
all of the following rules can be deleted.
b2(a1(b2(a1(x1)))) → b1(b0(c0(c1(x1)))) (574)
b2(a1(b2(a2(x1)))) → b1(b0(c0(c2(x1)))) (576)
c2(a1(b2(a1(x1)))) → c1(b0(c0(c1(x1)))) (577)
c2(a1(b2(a2(x1)))) → c1(b0(c0(c2(x1)))) (579)
a2(a1(b2(a1(x1)))) → a1(b0(c0(c1(x1)))) (580)
a2(a1(b2(a2(x1)))) → a1(b0(c0(c2(x1)))) (582)

1.2.2.1.1.1.1.1 R is empty

There are no rules in the TRS. Hence, it is terminating.