YES
The TRS could be proven terminating. The proof took 505 ms.
The following DP Processors were used
Problem 1 was processed with processor DependencyGraph (27ms).
| – Problem 2 was processed with processor PolynomialLinearRange4iUR (299ms).
| – Problem 3 was processed with processor SubtermCriterion (1ms).
| – Problem 4 was processed with processor SubtermCriterion (1ms).
Problem 1: DependencyGraph
Dependency Pair Problem
Dependency Pairs
| mod#(s(x), s(y)) | → | le#(y, x) | | le#(s(x), s(y)) | → | le#(x, y) |
| mod#(s(x), s(y)) | → | if_mod#(le(y, x), s(x), s(y)) | | if_mod#(true, s(x), s(y)) | → | minus#(x, y) |
| minus#(x, s(y)) | → | minus#(x, y) | | minus#(x, s(y)) | → | pred#(minus(x, y)) |
| if_mod#(true, s(x), s(y)) | → | mod#(minus(x, y), s(y)) |
Rewrite Rules
| le(0, y) | → | true | | le(s(x), 0) | → | false |
| le(s(x), s(y)) | → | le(x, y) | | pred(s(x)) | → | x |
| minus(x, 0) | → | x | | minus(x, s(y)) | → | pred(minus(x, y)) |
| mod(0, y) | → | 0 | | mod(s(x), 0) | → | 0 |
| mod(s(x), s(y)) | → | if_mod(le(y, x), s(x), s(y)) | | if_mod(true, s(x), s(y)) | → | mod(minus(x, y), s(y)) |
| if_mod(false, s(x), s(y)) | → | s(x) |
Original Signature
Termination of terms over the following signature is verified: 0, minus, le, s, mod, true, false, pred, if_mod
Strategy
The following SCCs where found
| le#(s(x), s(y)) → le#(x, y) |
| minus#(x, s(y)) → minus#(x, y) |
| mod#(s(x), s(y)) → if_mod#(le(y, x), s(x), s(y)) | if_mod#(true, s(x), s(y)) → mod#(minus(x, y), s(y)) |
Problem 2: PolynomialLinearRange4iUR
Dependency Pair Problem
Dependency Pairs
| mod#(s(x), s(y)) | → | if_mod#(le(y, x), s(x), s(y)) | | if_mod#(true, s(x), s(y)) | → | mod#(minus(x, y), s(y)) |
Rewrite Rules
| le(0, y) | → | true | | le(s(x), 0) | → | false |
| le(s(x), s(y)) | → | le(x, y) | | pred(s(x)) | → | x |
| minus(x, 0) | → | x | | minus(x, s(y)) | → | pred(minus(x, y)) |
| mod(0, y) | → | 0 | | mod(s(x), 0) | → | 0 |
| mod(s(x), s(y)) | → | if_mod(le(y, x), s(x), s(y)) | | if_mod(true, s(x), s(y)) | → | mod(minus(x, y), s(y)) |
| if_mod(false, s(x), s(y)) | → | s(x) |
Original Signature
Termination of terms over the following signature is verified: 0, minus, le, s, mod, true, false, pred, if_mod
Strategy
Polynomial Interpretation
- 0: 1
- false: 0
- if_mod(x,y,z): 0
- if_mod#(x,y,z): y
- le(x,y): 0
- minus(x,y): x
- mod(x,y): 0
- mod#(x,y): x + 1
- pred(x): x
- s(x): x + 2
- true: 0
Improved Usable rules
| pred(s(x)) | → | x | | minus(x, 0) | → | x |
| minus(x, s(y)) | → | pred(minus(x, y)) |
The following dependency pairs are strictly oriented by an ordering on the given polynomial interpretation, thus they are removed:
| mod#(s(x), s(y)) | → | if_mod#(le(y, x), s(x), s(y)) | | if_mod#(true, s(x), s(y)) | → | mod#(minus(x, y), s(y)) |
Problem 3: SubtermCriterion
Dependency Pair Problem
Dependency Pairs
| le#(s(x), s(y)) | → | le#(x, y) |
Rewrite Rules
| le(0, y) | → | true | | le(s(x), 0) | → | false |
| le(s(x), s(y)) | → | le(x, y) | | pred(s(x)) | → | x |
| minus(x, 0) | → | x | | minus(x, s(y)) | → | pred(minus(x, y)) |
| mod(0, y) | → | 0 | | mod(s(x), 0) | → | 0 |
| mod(s(x), s(y)) | → | if_mod(le(y, x), s(x), s(y)) | | if_mod(true, s(x), s(y)) | → | mod(minus(x, y), s(y)) |
| if_mod(false, s(x), s(y)) | → | s(x) |
Original Signature
Termination of terms over the following signature is verified: 0, minus, le, s, mod, true, false, pred, if_mod
Strategy
Projection
The following projection was used:
Thus, the following dependency pairs are removed:
| le#(s(x), s(y)) | → | le#(x, y) |
Problem 4: SubtermCriterion
Dependency Pair Problem
Dependency Pairs
| minus#(x, s(y)) | → | minus#(x, y) |
Rewrite Rules
| le(0, y) | → | true | | le(s(x), 0) | → | false |
| le(s(x), s(y)) | → | le(x, y) | | pred(s(x)) | → | x |
| minus(x, 0) | → | x | | minus(x, s(y)) | → | pred(minus(x, y)) |
| mod(0, y) | → | 0 | | mod(s(x), 0) | → | 0 |
| mod(s(x), s(y)) | → | if_mod(le(y, x), s(x), s(y)) | | if_mod(true, s(x), s(y)) | → | mod(minus(x, y), s(y)) |
| if_mod(false, s(x), s(y)) | → | s(x) |
Original Signature
Termination of terms over the following signature is verified: 0, minus, le, s, mod, true, false, pred, if_mod
Strategy
Projection
The following projection was used:
Thus, the following dependency pairs are removed:
| minus#(x, s(y)) | → | minus#(x, y) |