YES Termination proof of AG_#3.15_rand.trs

Termination of the given RelTRS could be proven:

0 RelTRS
↳1 RelTRSRRRProof (⇔, 39 ms)
↳2 RelTRS
↳3 RelTRSRRRProof (⇔, 18 ms)
↳4 RelTRS
↳5 RelTRSRRRProof (⇔, 0 ms)
↳6 RelTRS
↳7 RIsEmptyProof (⇔, 0 ms)
↳8 YES

(0) Obligation:

Relative term rewrite system:
The relative TRS consists of the following R rules:

average(s(x), y) → average(x, s(y))
average(x, s(s(s(y)))) → s(average(s(x), y))
average(0, 0) → 0
average(0, s(0)) → 0
average(0, s(s(0))) → s(0)

The relative TRS consists of the following S rules:

rand(x) → rand(s(x))
rand(x) → x

(1) RelTRSRRRProof (EQUIVALENT transformation)

We used the following monotonic ordering for rule removal:
Polynomial interpretation [POLO]:

POL(0) = 1   
POL(average(x1, x2)) = 1 + x1 + x2   
POL(rand(x1)) = 1 + x1   
POL(s(x1)) = x1   
With this ordering the following rules can be removed [MATRO] because they are oriented strictly:
Rules from R:

average(0, 0) → 0
average(0, s(0)) → 0
average(0, s(s(0))) → s(0)
Rules from S:

rand(x) → x


(2) Obligation:

Relative term rewrite system:
The relative TRS consists of the following R rules:

average(s(x), y) → average(x, s(y))
average(x, s(s(s(y)))) → s(average(s(x), y))

The relative TRS consists of the following S rules:

rand(x) → rand(s(x))

(3) RelTRSRRRProof (EQUIVALENT transformation)

We used the following monotonic ordering for rule removal:
Matrix interpretation [MATRO] to (N^2, +, *, >=, >) :

POL(average(x1, x2)) =
/1\
\0/
 +
/11\
\01/
·x1 +
/11\
\01/
·x2

POL(s(x1)) =
/0\
\1/
 +
/10\
\01/
·x1

POL(rand(x1)) =
/1\
\1/
 +
/10\
\00/
·x1
With this ordering the following rules can be removed [MATRO] because they are oriented strictly:
Rules from R:

average(x, s(s(s(y)))) → s(average(s(x), y))
Rules from S:
none


(4) Obligation:

Relative term rewrite system:
The relative TRS consists of the following R rules:

average(s(x), y) → average(x, s(y))

The relative TRS consists of the following S rules:

rand(x) → rand(s(x))

(5) RelTRSRRRProof (EQUIVALENT transformation)

We used the following monotonic ordering for rule removal:
Matrix interpretation [MATRO] to (N^2, +, *, >=, >) :

POL(average(x1, x2)) =
/0\
\1/
 +
/11\
\11/
·x1 +
/10\
\00/
·x2

POL(s(x1)) =
/0\
\1/
 +
/10\
\11/
·x1

POL(rand(x1)) =
/1\
\1/
 +
/10\
\00/
·x1
With this ordering the following rules can be removed [MATRO] because they are oriented strictly:
Rules from R:

average(s(x), y) → average(x, s(y))
Rules from S:
none


(6) Obligation:

Relative term rewrite system:
R is empty.
The relative TRS consists of the following S rules:

rand(x) → rand(s(x))

(7) RIsEmptyProof (EQUIVALENT transformation)

The TRS R is empty. Hence, termination is trivially proven.

(8) YES