Certification Problem
Input (TPDB SRS_Relative/Waldmann_19/random-79)
The rewrite relation of the following TRS is considered.
b(b(c(x1))) |
→ |
b(c(c(x1))) |
(1) |
a(a(a(x1))) |
→ |
c(b(a(x1))) |
(2) |
b(b(c(x1))) |
→ |
b(a(a(x1))) |
(3) |
c(b(c(x1))) |
→ |
a(a(a(x1))) |
(4) |
a(b(b(x1))) |
→ |
a(c(a(x1))) |
(5) |
a(c(b(x1))) |
→ |
b(a(c(x1))) |
(6) |
b(a(a(x1))) |
→ |
b(a(c(x1))) |
(7) |
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(c(x1))) |
→ |
b(c(c(x1))) |
(1) |
b(b(c(x1))) |
→ |
b(a(a(x1))) |
(3) |
a(b(b(x1))) |
→ |
a(c(a(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(c(x1)))) |
→ |
c(b(c(c(x1)))) |
(8) |
c(b(b(c(x1)))) |
→ |
c(b(a(a(x1)))) |
(9) |
c(a(b(b(x1)))) |
→ |
c(a(c(a(x1)))) |
(10) |
b(b(b(c(x1)))) |
→ |
b(b(c(c(x1)))) |
(11) |
b(b(b(c(x1)))) |
→ |
b(b(a(a(x1)))) |
(12) |
b(a(b(b(x1)))) |
→ |
b(a(c(a(x1)))) |
(13) |
a(b(b(c(x1)))) |
→ |
a(b(c(c(x1)))) |
(14) |
a(b(b(c(x1)))) |
→ |
a(b(a(a(x1)))) |
(15) |
a(a(b(b(x1)))) |
→ |
a(a(c(a(x1)))) |
(16) |
c(a(a(a(x1)))) |
→ |
c(c(b(a(x1)))) |
(17) |
c(c(b(c(x1)))) |
→ |
c(a(a(a(x1)))) |
(18) |
c(a(c(b(x1)))) |
→ |
c(b(a(c(x1)))) |
(19) |
c(b(a(a(x1)))) |
→ |
c(b(a(c(x1)))) |
(20) |
b(a(a(a(x1)))) |
→ |
b(c(b(a(x1)))) |
(21) |
b(c(b(c(x1)))) |
→ |
b(a(a(a(x1)))) |
(22) |
b(a(c(b(x1)))) |
→ |
b(b(a(c(x1)))) |
(23) |
b(b(a(a(x1)))) |
→ |
b(b(a(c(x1)))) |
(24) |
a(a(a(a(x1)))) |
→ |
a(c(b(a(x1)))) |
(25) |
a(c(b(c(x1)))) |
→ |
a(a(a(a(x1)))) |
(26) |
a(a(c(b(x1)))) |
→ |
a(b(a(c(x1)))) |
(27) |
a(b(a(a(x1)))) |
→ |
a(b(a(c(x1)))) |
(28) |
1.1.1 Closure Under Flat Contexts
Using the flat contexts
{c(☐), b(☐), a(☐)}
We obtain the transformed TRS
c(c(b(b(c(x1))))) |
→ |
c(c(b(c(c(x1))))) |
(29) |
c(c(b(b(c(x1))))) |
→ |
c(c(b(a(a(x1))))) |
(30) |
c(c(a(b(b(x1))))) |
→ |
c(c(a(c(a(x1))))) |
(31) |
c(b(b(b(c(x1))))) |
→ |
c(b(b(c(c(x1))))) |
(32) |
c(b(b(b(c(x1))))) |
→ |
c(b(b(a(a(x1))))) |
(33) |
c(b(a(b(b(x1))))) |
→ |
c(b(a(c(a(x1))))) |
(34) |
c(a(b(b(c(x1))))) |
→ |
c(a(b(c(c(x1))))) |
(35) |
c(a(b(b(c(x1))))) |
→ |
c(a(b(a(a(x1))))) |
(36) |
c(a(a(b(b(x1))))) |
→ |
c(a(a(c(a(x1))))) |
(37) |
b(c(b(b(c(x1))))) |
→ |
b(c(b(c(c(x1))))) |
(38) |
b(c(b(b(c(x1))))) |
→ |
b(c(b(a(a(x1))))) |
(39) |
b(c(a(b(b(x1))))) |
→ |
b(c(a(c(a(x1))))) |
(40) |
b(b(b(b(c(x1))))) |
→ |
b(b(b(c(c(x1))))) |
(41) |
b(b(b(b(c(x1))))) |
→ |
b(b(b(a(a(x1))))) |
(42) |
b(b(a(b(b(x1))))) |
→ |
b(b(a(c(a(x1))))) |
(43) |
b(a(b(b(c(x1))))) |
→ |
b(a(b(c(c(x1))))) |
(44) |
b(a(b(b(c(x1))))) |
→ |
b(a(b(a(a(x1))))) |
(45) |
b(a(a(b(b(x1))))) |
→ |
b(a(a(c(a(x1))))) |
(46) |
a(c(b(b(c(x1))))) |
→ |
a(c(b(c(c(x1))))) |
(47) |
a(c(b(b(c(x1))))) |
→ |
a(c(b(a(a(x1))))) |
(48) |
a(c(a(b(b(x1))))) |
→ |
a(c(a(c(a(x1))))) |
(49) |
a(b(b(b(c(x1))))) |
→ |
a(b(b(c(c(x1))))) |
(50) |
a(b(b(b(c(x1))))) |
→ |
a(b(b(a(a(x1))))) |
(51) |
a(b(a(b(b(x1))))) |
→ |
a(b(a(c(a(x1))))) |
(52) |
a(a(b(b(c(x1))))) |
→ |
a(a(b(c(c(x1))))) |
(53) |
a(a(b(b(c(x1))))) |
→ |
a(a(b(a(a(x1))))) |
(54) |
a(a(a(b(b(x1))))) |
→ |
a(a(a(c(a(x1))))) |
(55) |
c(c(a(a(a(x1))))) |
→ |
c(c(c(b(a(x1))))) |
(56) |
c(c(c(b(c(x1))))) |
→ |
c(c(a(a(a(x1))))) |
(57) |
c(c(a(c(b(x1))))) |
→ |
c(c(b(a(c(x1))))) |
(58) |
c(c(b(a(a(x1))))) |
→ |
c(c(b(a(c(x1))))) |
(59) |
c(b(a(a(a(x1))))) |
→ |
c(b(c(b(a(x1))))) |
(60) |
c(b(c(b(c(x1))))) |
→ |
c(b(a(a(a(x1))))) |
(61) |
c(b(a(c(b(x1))))) |
→ |
c(b(b(a(c(x1))))) |
(62) |
c(b(b(a(a(x1))))) |
→ |
c(b(b(a(c(x1))))) |
(63) |
c(a(a(a(a(x1))))) |
→ |
c(a(c(b(a(x1))))) |
(64) |
c(a(c(b(c(x1))))) |
→ |
c(a(a(a(a(x1))))) |
(65) |
c(a(a(c(b(x1))))) |
→ |
c(a(b(a(c(x1))))) |
(66) |
c(a(b(a(a(x1))))) |
→ |
c(a(b(a(c(x1))))) |
(67) |
b(c(a(a(a(x1))))) |
→ |
b(c(c(b(a(x1))))) |
(68) |
b(c(c(b(c(x1))))) |
→ |
b(c(a(a(a(x1))))) |
(69) |
b(c(a(c(b(x1))))) |
→ |
b(c(b(a(c(x1))))) |
(70) |
b(c(b(a(a(x1))))) |
→ |
b(c(b(a(c(x1))))) |
(71) |
b(b(a(a(a(x1))))) |
→ |
b(b(c(b(a(x1))))) |
(72) |
b(b(c(b(c(x1))))) |
→ |
b(b(a(a(a(x1))))) |
(73) |
b(b(a(c(b(x1))))) |
→ |
b(b(b(a(c(x1))))) |
(74) |
b(b(b(a(a(x1))))) |
→ |
b(b(b(a(c(x1))))) |
(75) |
b(a(a(a(a(x1))))) |
→ |
b(a(c(b(a(x1))))) |
(76) |
b(a(c(b(c(x1))))) |
→ |
b(a(a(a(a(x1))))) |
(77) |
b(a(a(c(b(x1))))) |
→ |
b(a(b(a(c(x1))))) |
(78) |
b(a(b(a(a(x1))))) |
→ |
b(a(b(a(c(x1))))) |
(79) |
a(c(a(a(a(x1))))) |
→ |
a(c(c(b(a(x1))))) |
(80) |
a(c(c(b(c(x1))))) |
→ |
a(c(a(a(a(x1))))) |
(81) |
a(c(a(c(b(x1))))) |
→ |
a(c(b(a(c(x1))))) |
(82) |
a(c(b(a(a(x1))))) |
→ |
a(c(b(a(c(x1))))) |
(83) |
a(b(a(a(a(x1))))) |
→ |
a(b(c(b(a(x1))))) |
(84) |
a(b(c(b(c(x1))))) |
→ |
a(b(a(a(a(x1))))) |
(85) |
a(b(a(c(b(x1))))) |
→ |
a(b(b(a(c(x1))))) |
(86) |
a(b(b(a(a(x1))))) |
→ |
a(b(b(a(c(x1))))) |
(87) |
a(a(a(a(a(x1))))) |
→ |
a(a(c(b(a(x1))))) |
(88) |
a(a(c(b(c(x1))))) |
→ |
a(a(a(a(a(x1))))) |
(89) |
a(a(a(c(b(x1))))) |
→ |
a(a(b(a(c(x1))))) |
(90) |
a(a(b(a(a(x1))))) |
→ |
a(a(b(a(c(x1))))) |
(91) |
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 567 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 +
|
[c3(x1)] |
= |
x1 +
|
[c6(x1)] |
= |
x1 +
|
[c1(x1)] |
= |
x1 +
|
[c4(x1)] |
= |
x1 +
|
[c7(x1)] |
= |
x1 +
|
[c2(x1)] |
= |
x1 +
|
[c5(x1)] |
= |
x1 +
|
[c8(x1)] |
= |
x1 +
|
[b0(x1)] |
= |
x1 +
|
[b3(x1)] |
= |
x1 +
|
[b6(x1)] |
= |
x1 +
|
[b1(x1)] |
= |
x1 +
|
[b4(x1)] |
= |
x1 +
|
[b7(x1)] |
= |
x1 +
|
[b2(x1)] |
= |
x1 +
|
[b5(x1)] |
= |
x1 +
|
[b8(x1)] |
= |
x1 +
|
[a0(x1)] |
= |
x1 +
|
[a3(x1)] |
= |
x1 +
|
[a6(x1)] |
= |
x1 +
|
[a1(x1)] |
= |
x1 +
|
[a4(x1)] |
= |
x1 +
|
[a7(x1)] |
= |
x1 +
|
[a2(x1)] |
= |
x1 +
|
[a5(x1)] |
= |
x1 +
|
[a8(x1)] |
= |
x1 +
|
all of the following rules can be deleted.
There are 512 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
a(a(a(x1))) |
→ |
c(b(a(x1))) |
(2) |
c(b(c(x1))) |
→ |
a(a(a(x1))) |
(4) |
b(a(a(x1))) |
→ |
b(a(c(x1))) |
(7) |
are deleted.
1.2.1 Closure Under Flat Contexts
Using the flat contexts
{c(☐), b(☐), a(☐)}
We obtain the transformed TRS
c(a(a(a(x1)))) |
→ |
c(c(b(a(x1)))) |
(17) |
c(c(b(c(x1)))) |
→ |
c(a(a(a(x1)))) |
(18) |
c(b(a(a(x1)))) |
→ |
c(b(a(c(x1)))) |
(20) |
b(a(a(a(x1)))) |
→ |
b(c(b(a(x1)))) |
(21) |
b(c(b(c(x1)))) |
→ |
b(a(a(a(x1)))) |
(22) |
b(b(a(a(x1)))) |
→ |
b(b(a(c(x1)))) |
(24) |
a(a(a(a(x1)))) |
→ |
a(c(b(a(x1)))) |
(25) |
a(c(b(c(x1)))) |
→ |
a(a(a(a(x1)))) |
(26) |
a(b(a(a(x1)))) |
→ |
a(b(a(c(x1)))) |
(28) |
c(a(c(b(x1)))) |
→ |
c(b(a(c(x1)))) |
(19) |
b(a(c(b(x1)))) |
→ |
b(b(a(c(x1)))) |
(23) |
a(a(c(b(x1)))) |
→ |
a(b(a(c(x1)))) |
(27) |
1.2.1.1 Closure Under Flat Contexts
Using the flat contexts
{c(☐), b(☐), a(☐)}
We obtain the transformed TRS
c(c(a(a(a(x1))))) |
→ |
c(c(c(b(a(x1))))) |
(56) |
c(c(c(b(c(x1))))) |
→ |
c(c(a(a(a(x1))))) |
(57) |
c(c(b(a(a(x1))))) |
→ |
c(c(b(a(c(x1))))) |
(59) |
c(b(a(a(a(x1))))) |
→ |
c(b(c(b(a(x1))))) |
(60) |
c(b(c(b(c(x1))))) |
→ |
c(b(a(a(a(x1))))) |
(61) |
c(b(b(a(a(x1))))) |
→ |
c(b(b(a(c(x1))))) |
(63) |
c(a(a(a(a(x1))))) |
→ |
c(a(c(b(a(x1))))) |
(64) |
c(a(c(b(c(x1))))) |
→ |
c(a(a(a(a(x1))))) |
(65) |
c(a(b(a(a(x1))))) |
→ |
c(a(b(a(c(x1))))) |
(67) |
b(c(a(a(a(x1))))) |
→ |
b(c(c(b(a(x1))))) |
(68) |
b(c(c(b(c(x1))))) |
→ |
b(c(a(a(a(x1))))) |
(69) |
b(c(b(a(a(x1))))) |
→ |
b(c(b(a(c(x1))))) |
(71) |
b(b(a(a(a(x1))))) |
→ |
b(b(c(b(a(x1))))) |
(72) |
b(b(c(b(c(x1))))) |
→ |
b(b(a(a(a(x1))))) |
(73) |
b(b(b(a(a(x1))))) |
→ |
b(b(b(a(c(x1))))) |
(75) |
b(a(a(a(a(x1))))) |
→ |
b(a(c(b(a(x1))))) |
(76) |
b(a(c(b(c(x1))))) |
→ |
b(a(a(a(a(x1))))) |
(77) |
b(a(b(a(a(x1))))) |
→ |
b(a(b(a(c(x1))))) |
(79) |
a(c(a(a(a(x1))))) |
→ |
a(c(c(b(a(x1))))) |
(80) |
a(c(c(b(c(x1))))) |
→ |
a(c(a(a(a(x1))))) |
(81) |
a(c(b(a(a(x1))))) |
→ |
a(c(b(a(c(x1))))) |
(83) |
a(b(a(a(a(x1))))) |
→ |
a(b(c(b(a(x1))))) |
(84) |
a(b(c(b(c(x1))))) |
→ |
a(b(a(a(a(x1))))) |
(85) |
a(b(b(a(a(x1))))) |
→ |
a(b(b(a(c(x1))))) |
(87) |
a(a(a(a(a(x1))))) |
→ |
a(a(c(b(a(x1))))) |
(88) |
a(a(c(b(c(x1))))) |
→ |
a(a(a(a(a(x1))))) |
(89) |
a(a(b(a(a(x1))))) |
→ |
a(a(b(a(c(x1))))) |
(91) |
c(c(a(c(b(x1))))) |
→ |
c(c(b(a(c(x1))))) |
(58) |
c(b(a(c(b(x1))))) |
→ |
c(b(b(a(c(x1))))) |
(62) |
c(a(a(c(b(x1))))) |
→ |
c(a(b(a(c(x1))))) |
(66) |
b(c(a(c(b(x1))))) |
→ |
b(c(b(a(c(x1))))) |
(70) |
b(b(a(c(b(x1))))) |
→ |
b(b(b(a(c(x1))))) |
(74) |
b(a(a(c(b(x1))))) |
→ |
b(a(b(a(c(x1))))) |
(78) |
a(c(a(c(b(x1))))) |
→ |
a(c(b(a(c(x1))))) |
(82) |
a(b(a(c(b(x1))))) |
→ |
a(b(b(a(c(x1))))) |
(86) |
a(a(a(c(b(x1))))) |
→ |
a(a(b(a(c(x1))))) |
(90) |
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 +
|
[c3(x1)] |
= |
x1 +
|
[c6(x1)] |
= |
x1 +
|
[c1(x1)] |
= |
x1 +
|
[c4(x1)] |
= |
x1 +
|
[c7(x1)] |
= |
x1 +
|
[c2(x1)] |
= |
x1 +
|
[c5(x1)] |
= |
x1 +
|
[c8(x1)] |
= |
x1 +
|
[b0(x1)] |
= |
x1 +
|
[b3(x1)] |
= |
x1 +
|
[b6(x1)] |
= |
x1 +
|
[b1(x1)] |
= |
x1 +
|
[b4(x1)] |
= |
x1 +
|
[b7(x1)] |
= |
x1 +
|
[b2(x1)] |
= |
x1 +
|
[b5(x1)] |
= |
x1 +
|
[b8(x1)] |
= |
x1 +
|
[a0(x1)] |
= |
x1 +
|
[a3(x1)] |
= |
x1 +
|
[a6(x1)] |
= |
x1 +
|
[a1(x1)] |
= |
x1 +
|
[a4(x1)] |
= |
x1 +
|
[a7(x1)] |
= |
x1 +
|
[a2(x1)] |
= |
x1 +
|
[a5(x1)] |
= |
x1 +
|
[a8(x1)] |
= |
x1 +
|
all of the following rules can be deleted.
There are 269 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)] |
= |
· x1 +
|
[c1(x1)] |
= |
· x1 +
|
[c4(x1)] |
= |
· x1 +
|
[c7(x1)] |
= |
· x1 +
|
[c2(x1)] |
= |
· x1 +
|
[c5(x1)] |
= |
· x1 +
|
[b3(x1)] |
= |
· x1 +
|
[b1(x1)] |
= |
· x1 +
|
[b4(x1)] |
= |
· x1 +
|
[b7(x1)] |
= |
· x1 +
|
[b2(x1)] |
= |
· x1 +
|
[b5(x1)] |
= |
· x1 +
|
[b8(x1)] |
= |
· x1 +
|
[a3(x1)] |
= |
· x1 +
|
[a6(x1)] |
= |
· x1 +
|
[a1(x1)] |
= |
· x1 +
|
[a4(x1)] |
= |
· x1 +
|
[a7(x1)] |
= |
· x1 +
|
[a2(x1)] |
= |
· x1 +
|
[a5(x1)] |
= |
· x1 +
|
[a8(x1)] |
= |
· x1 +
|
all of the following rules can be deleted.
a7(b8(a8(a8(a8(x1))))) |
→ |
a1(b3(c7(b8(a8(x1))))) |
(397) |
a7(b8(a8(a8(a2(x1))))) |
→ |
a1(b3(c7(b8(a2(x1))))) |
(396) |
a7(b8(a8(a8(a5(x1))))) |
→ |
a1(b3(c7(b8(a5(x1))))) |
(395) |
c7(b8(a8(a8(a8(x1))))) |
→ |
c1(b3(c7(b8(a8(x1))))) |
(370) |
c7(b8(a8(a8(a2(x1))))) |
→ |
c1(b3(c7(b8(a2(x1))))) |
(369) |
c7(b8(a8(a8(a5(x1))))) |
→ |
c1(b3(c7(b8(a5(x1))))) |
(368) |
b7(b8(a8(a8(a8(x1))))) |
→ |
b1(b3(c7(b8(a8(x1))))) |
(343) |
b7(b8(a8(a8(a2(x1))))) |
→ |
b1(b3(c7(b8(a2(x1))))) |
(342) |
b7(b8(a8(a8(a5(x1))))) |
→ |
b1(b3(c7(b8(a5(x1))))) |
(341) |
a6(c2(a3(c4(b1(x1))))) |
→ |
a3(c7(b2(a3(c1(x1))))) |
(561) |
a7(b2(a3(c4(b1(x1))))) |
→ |
a4(b7(b2(a3(c1(x1))))) |
(552) |
c7(b2(a3(c4(b1(x1))))) |
→ |
c4(b7(b2(a3(c1(x1))))) |
(525) |
b7(b2(a3(c4(b1(x1))))) |
→ |
b4(b7(b2(a3(c1(x1))))) |
(498) |
1.2.1.1.1.1.1.1 Rule Removal
Using the
matrix interpretations of dimension 1 with strict dimension 1 over the rationals with delta = 1
[c3(x1)] |
= |
x1 +
|
[c1(x1)] |
= |
x1 +
|
[c4(x1)] |
= |
x1 +
|
[c7(x1)] |
= |
x1 +
|
[c2(x1)] |
= |
x1 +
|
[c5(x1)] |
= |
x1 +
|
[b3(x1)] |
= |
x1 +
|
[b4(x1)] |
= |
x1 +
|
[b7(x1)] |
= |
x1 +
|
[b2(x1)] |
= |
x1 +
|
[b5(x1)] |
= |
x1 +
|
[b8(x1)] |
= |
x1 +
|
[a3(x1)] |
= |
x1 +
|
[a6(x1)] |
= |
x1 +
|
[a1(x1)] |
= |
x1 +
|
[a4(x1)] |
= |
x1 +
|
[a7(x1)] |
= |
x1 +
|
[a5(x1)] |
= |
x1 +
|
[a8(x1)] |
= |
x1 +
|
all of the following rules can be deleted.
b2(a3(c1(b3(c7(x1))))) |
→ |
b8(a8(a8(a5(a7(x1))))) |
(436) |
b2(a3(c1(b3(c1(x1))))) |
→ |
b8(a8(a8(a5(a1(x1))))) |
(435) |
b2(a3(c1(b3(c4(x1))))) |
→ |
b8(a8(a8(a5(a4(x1))))) |
(434) |
a5(a7(b8(a5(a7(x1))))) |
→ |
a5(a7(b2(a3(c7(x1))))) |
(652) |
a5(a7(b8(a5(a1(x1))))) |
→ |
a5(a7(b2(a3(c1(x1))))) |
(651) |
a5(a7(b8(a5(a4(x1))))) |
→ |
a5(a7(b2(a3(c4(x1))))) |
(650) |
a3(c7(b8(a5(a7(x1))))) |
→ |
a3(c7(b2(a3(c7(x1))))) |
(643) |
a3(c7(b8(a5(a1(x1))))) |
→ |
a3(c7(b2(a3(c1(x1))))) |
(642) |
a3(c7(b8(a5(a4(x1))))) |
→ |
a3(c7(b2(a3(c4(x1))))) |
(641) |
a4(b7(b8(a5(a7(x1))))) |
→ |
a4(b7(b2(a3(c7(x1))))) |
(634) |
a4(b7(b8(a5(a1(x1))))) |
→ |
a4(b7(b2(a3(c1(x1))))) |
(633) |
a4(b7(b8(a5(a4(x1))))) |
→ |
a4(b7(b2(a3(c4(x1))))) |
(632) |
c5(a7(b8(a5(a7(x1))))) |
→ |
c5(a7(b2(a3(c7(x1))))) |
(625) |
c5(a7(b8(a5(a1(x1))))) |
→ |
c5(a7(b2(a3(c1(x1))))) |
(624) |
c5(a7(b8(a5(a4(x1))))) |
→ |
c5(a7(b2(a3(c4(x1))))) |
(623) |
c3(c7(b8(a5(a7(x1))))) |
→ |
c3(c7(b2(a3(c7(x1))))) |
(616) |
c3(c7(b8(a5(a1(x1))))) |
→ |
c3(c7(b2(a3(c1(x1))))) |
(615) |
c3(c7(b8(a5(a4(x1))))) |
→ |
c3(c7(b2(a3(c4(x1))))) |
(614) |
c4(b7(b8(a5(a7(x1))))) |
→ |
c4(b7(b2(a3(c7(x1))))) |
(607) |
c4(b7(b8(a5(a1(x1))))) |
→ |
c4(b7(b2(a3(c1(x1))))) |
(606) |
c4(b7(b8(a5(a4(x1))))) |
→ |
c4(b7(b2(a3(c4(x1))))) |
(605) |
b5(a7(b8(a5(a7(x1))))) |
→ |
b5(a7(b2(a3(c7(x1))))) |
(598) |
b5(a7(b8(a5(a1(x1))))) |
→ |
b5(a7(b2(a3(c1(x1))))) |
(597) |
b5(a7(b8(a5(a4(x1))))) |
→ |
b5(a7(b2(a3(c4(x1))))) |
(596) |
b3(c7(b8(a5(a7(x1))))) |
→ |
b3(c7(b2(a3(c7(x1))))) |
(589) |
b3(c7(b8(a5(a1(x1))))) |
→ |
b3(c7(b2(a3(c1(x1))))) |
(588) |
b3(c7(b8(a5(a4(x1))))) |
→ |
b3(c7(b2(a3(c4(x1))))) |
(587) |
b4(b7(b8(a5(a7(x1))))) |
→ |
b4(b7(b2(a3(c7(x1))))) |
(580) |
b4(b7(b8(a5(a1(x1))))) |
→ |
b4(b7(b2(a3(c1(x1))))) |
(579) |
b4(b7(b8(a5(a4(x1))))) |
→ |
b4(b7(b2(a3(c4(x1))))) |
(578) |
a7(b2(a3(c7(b2(x1))))) |
→ |
a4(b7(b2(a6(c2(x1))))) |
(558) |
a7(b2(a3(c4(b7(x1))))) |
→ |
a4(b7(b2(a3(c7(x1))))) |
(553) |
a7(b2(a3(c4(b4(x1))))) |
→ |
a4(b7(b2(a3(c4(x1))))) |
(551) |
1.2.1.1.1.1.1.1.1 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(a(c(b(x1)))) |
→ |
c(b(a(c(x1)))) |
(19) |
b(a(c(b(x1)))) |
→ |
b(b(a(c(x1)))) |
(23) |
a(a(c(b(x1)))) |
→ |
a(b(a(c(x1)))) |
(27) |
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
a2(a0(c1(b2(x1)))) |
→ |
a1(b2(a0(c2(x1)))) |
(659) |
a2(a0(c1(b0(x1)))) |
→ |
a1(b2(a0(c0(x1)))) |
(660) |
a2(a0(c1(b1(x1)))) |
→ |
a1(b2(a0(c1(x1)))) |
(661) |
c2(a0(c1(b2(x1)))) |
→ |
c1(b2(a0(c2(x1)))) |
(662) |
c2(a0(c1(b0(x1)))) |
→ |
c1(b2(a0(c0(x1)))) |
(663) |
c2(a0(c1(b1(x1)))) |
→ |
c1(b2(a0(c1(x1)))) |
(664) |
b2(a0(c1(b2(x1)))) |
→ |
b1(b2(a0(c2(x1)))) |
(665) |
b2(a0(c1(b0(x1)))) |
→ |
b1(b2(a0(c0(x1)))) |
(666) |
b2(a0(c1(b1(x1)))) |
→ |
b1(b2(a0(c1(x1)))) |
(667) |
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 +
|
[c1(x1)] |
= |
x1 +
|
[c2(x1)] |
= |
x1 +
|
[b0(x1)] |
= |
x1 +
|
[b1(x1)] |
= |
x1 +
|
[b2(x1)] |
= |
x1 +
|
[a0(x1)] |
= |
x1 +
|
[a1(x1)] |
= |
x1 +
|
[a2(x1)] |
= |
x1 +
|
all of the following rules can be deleted.
a2(a0(c1(b2(x1)))) |
→ |
a1(b2(a0(c2(x1)))) |
(659) |
a2(a0(c1(b0(x1)))) |
→ |
a1(b2(a0(c0(x1)))) |
(660) |
a2(a0(c1(b1(x1)))) |
→ |
a1(b2(a0(c1(x1)))) |
(661) |
c2(a0(c1(b0(x1)))) |
→ |
c1(b2(a0(c0(x1)))) |
(663) |
b2(a0(c1(b0(x1)))) |
→ |
b1(b2(a0(c0(x1)))) |
(666) |
1.2.2.1.1.1 Rule Removal
Using the
matrix interpretations of dimension 1 with strict dimension 1 over the naturals
[c1(x1)] |
= |
· x1 +
|
[c2(x1)] |
= |
· x1 +
|
[b1(x1)] |
= |
· x1 +
|
[b2(x1)] |
= |
· x1 +
|
[a0(x1)] |
= |
· x1 +
|
all of the following rules can be deleted.
c2(a0(c1(b2(x1)))) |
→ |
c1(b2(a0(c2(x1)))) |
(662) |
c2(a0(c1(b1(x1)))) |
→ |
c1(b2(a0(c1(x1)))) |
(664) |
b2(a0(c1(b2(x1)))) |
→ |
b1(b2(a0(c2(x1)))) |
(665) |
b2(a0(c1(b1(x1)))) |
→ |
b1(b2(a0(c1(x1)))) |
(667) |
1.2.2.1.1.1.1 R is empty
There are no rules in the TRS. Hence, it is terminating.