Termination w.r.t. Q proof of /tmp/tmp

Termination w.r.t. Q of the given QTRS could not be shown:

0 QTRS

↳1 Overlay + Local Confluence (⇔)

↳2 QTRS

↳3 DependencyPairsProof (⇔)

↳4 QDP

↳5 DependencyGraphProof (⇔)

↳6 AND

  ↳7 QDP

    ↳8 QDPOrderProof (⇔)

    ↳9 QDP

    ↳10 PisEmptyProof (⇔)

    ↳11 TRUE

  ↳12 QDP

(0) Obligation:

Q restricted rewrite system:
The TRS R consists of the following rules:

isLeaf(leaf) → true
isLeaf(cons(u, v)) → false
left(cons(u, v)) → u
right(cons(u, v)) → v
concat(leaf, y) → y
concat(cons(u, v), y) → cons(u, concat(v, y))
less_leaves(u, v) → if1(isLeaf(u), isLeaf(v), u, v)
if1(b, true, u, v) → false
if1(b, false, u, v) → if2(b, u, v)
if2(true, u, v) → true
if2(false, u, v) → less_leaves(concat(left(u), right(u)), concat(left(v), right(v)))

Q is empty.

(1) Overlay + Local Confluence (EQUIVALENT transformation)

The TRS is overlay and locally confluent. By [NOC] we can switch to innermost.

(2) Obligation:

Q restricted rewrite system:
The TRS R consists of the following rules:

isLeaf(leaf) → true
isLeaf(cons(u, v)) → false
left(cons(u, v)) → u
right(cons(u, v)) → v
concat(leaf, y) → y
concat(cons(u, v), y) → cons(u, concat(v, y))
less_leaves(u, v) → if1(isLeaf(u), isLeaf(v), u, v)
if1(b, true, u, v) → false
if1(b, false, u, v) → if2(b, u, v)
if2(true, u, v) → true
if2(false, u, v) → less_leaves(concat(left(u), right(u)), concat(left(v), right(v)))

The set Q consists of the following terms:

isLeaf(leaf)
isLeaf(cons(x0, x1))
left(cons(x0, x1))
right(cons(x0, x1))
concat(leaf, x0)
concat(cons(x0, x1), x2)
less_leaves(x0, x1)
if1(x0, true, x1, x2)
if1(x0, false, x1, x2)
if2(true, x0, x1)
if2(false, x0, x1)

(3) DependencyPairsProof (EQUIVALENT transformation)

Using Dependency Pairs [AG00,LPAR04] we result in the following initial DP problem.

(4) Obligation:

Q DP problem:
The TRS P consists of the following rules:

CONCAT(cons(u, v), y) → CONCAT(v, y)
LESS_LEAVES(u, v) → IF1(isLeaf(u), isLeaf(v), u, v)
LESS_LEAVES(u, v) → ISLEAF(u)
LESS_LEAVES(u, v) → ISLEAF(v)
IF1(b, false, u, v) → IF2(b, u, v)
IF2(false, u, v) → LESS_LEAVES(concat(left(u), right(u)), concat(left(v), right(v)))
IF2(false, u, v) → CONCAT(left(u), right(u))
IF2(false, u, v) → LEFT(u)
IF2(false, u, v) → RIGHT(u)
IF2(false, u, v) → CONCAT(left(v), right(v))
IF2(false, u, v) → LEFT(v)
IF2(false, u, v) → RIGHT(v)

The TRS R consists of the following rules:

isLeaf(leaf) → true
isLeaf(cons(u, v)) → false
left(cons(u, v)) → u
right(cons(u, v)) → v
concat(leaf, y) → y
concat(cons(u, v), y) → cons(u, concat(v, y))
less_leaves(u, v) → if1(isLeaf(u), isLeaf(v), u, v)
if1(b, true, u, v) → false
if1(b, false, u, v) → if2(b, u, v)
if2(true, u, v) → true
if2(false, u, v) → less_leaves(concat(left(u), right(u)), concat(left(v), right(v)))

The set Q consists of the following terms:

isLeaf(leaf)
isLeaf(cons(x0, x1))
left(cons(x0, x1))
right(cons(x0, x1))
concat(leaf, x0)
concat(cons(x0, x1), x2)
less_leaves(x0, x1)
if1(x0, true, x1, x2)
if1(x0, false, x1, x2)
if2(true, x0, x1)
if2(false, x0, x1)

We have to consider all minimal (P,Q,R)-chains.

(5) DependencyGraphProof (EQUIVALENT transformation)

The approximation of the Dependency Graph [LPAR04,FROCOS05,EDGSTAR] contains 2 SCCs with 8 less nodes.

(6) Complex Obligation (AND)

(7) Obligation:

Q DP problem:
The TRS P consists of the following rules:

CONCAT(cons(u, v), y) → CONCAT(v, y)

The TRS R consists of the following rules:

isLeaf(leaf) → true
isLeaf(cons(u, v)) → false
left(cons(u, v)) → u
right(cons(u, v)) → v
concat(leaf, y) → y
concat(cons(u, v), y) → cons(u, concat(v, y))
less_leaves(u, v) → if1(isLeaf(u), isLeaf(v), u, v)
if1(b, true, u, v) → false
if1(b, false, u, v) → if2(b, u, v)
if2(true, u, v) → true
if2(false, u, v) → less_leaves(concat(left(u), right(u)), concat(left(v), right(v)))

The set Q consists of the following terms:

isLeaf(leaf)
isLeaf(cons(x0, x1))
left(cons(x0, x1))
right(cons(x0, x1))
concat(leaf, x0)
concat(cons(x0, x1), x2)
less_leaves(x0, x1)
if1(x0, true, x1, x2)
if1(x0, false, x1, x2)
if2(true, x0, x1)
if2(false, x0, x1)

We have to consider all minimal (P,Q,R)-chains.

(8) QDPOrderProof (EQUIVALENT transformation)

We use the reduction pair processor [LPAR04].

The following pairs can be oriented strictly and are deleted.

CONCAT(cons(u, v), y) → CONCAT(v, y)

The remaining pairs can at least be oriented weakly.
Used ordering: Combined order from the following AFS and order.
CONCAT(x1, x2) = CONCAT(x1)
cons(x1, x2) = cons(x1, x2)
isLeaf(x1) = isLeaf
leaf = leaf
true = true
false = false
left(x1) = left(x1)
right(x1) = right(x1)
concat(x1, x2) = concat(x1, x2)
less_leaves(x1, x2) = less_leaves
if1(x1, x2, x3, x4) = x1
if2(x1, x2, x3) = x1

Lexicographic path order with status [LPO].
Quasi-Precedence:

CONCAT₁ > [isLeaf, leaf, true, false, right₁, less_leaves]
left₁ > [isLeaf, leaf, true, false, right₁, less_leaves]
concat₂ > cons₂ > [isLeaf, leaf, true, false, right₁, less_leaves]

Status:

cons₂: [1,2]
CONCAT₁: [1]
isLeaf: []
true: []
right₁: [1]
leaf: []
false: []
concat₂: [2,1]
left₁: [1]
less_leaves: []

The following usable rules [FROCOS05] were oriented:

isLeaf(leaf) → true
isLeaf(cons(u, v)) → false
left(cons(u, v)) → u
right(cons(u, v)) → v
concat(leaf, y) → y
concat(cons(u, v), y) → cons(u, concat(v, y))
less_leaves(u, v) → if1(isLeaf(u), isLeaf(v), u, v)
if1(b, true, u, v) → false
if1(b, false, u, v) → if2(b, u, v)
if2(true, u, v) → true
if2(false, u, v) → less_leaves(concat(left(u), right(u)), concat(left(v), right(v)))

(9) Obligation:

Q DP problem:
P is empty.
The TRS R consists of the following rules:

isLeaf(leaf) → true
isLeaf(cons(u, v)) → false
left(cons(u, v)) → u
right(cons(u, v)) → v
concat(leaf, y) → y
concat(cons(u, v), y) → cons(u, concat(v, y))
less_leaves(u, v) → if1(isLeaf(u), isLeaf(v), u, v)
if1(b, true, u, v) → false
if1(b, false, u, v) → if2(b, u, v)
if2(true, u, v) → true
if2(false, u, v) → less_leaves(concat(left(u), right(u)), concat(left(v), right(v)))

The set Q consists of the following terms:

isLeaf(leaf)
isLeaf(cons(x0, x1))
left(cons(x0, x1))
right(cons(x0, x1))
concat(leaf, x0)
concat(cons(x0, x1), x2)
less_leaves(x0, x1)
if1(x0, true, x1, x2)
if1(x0, false, x1, x2)
if2(true, x0, x1)
if2(false, x0, x1)

We have to consider all minimal (P,Q,R)-chains.

(10) PisEmptyProof (EQUIVALENT transformation)

The TRS P is empty. Hence, there is no (P,Q,R) chain.

(11) TRUE

(12) Obligation:

Q DP problem:
The TRS P consists of the following rules:

IF2(false, u, v) → LESS_LEAVES(concat(left(u), right(u)), concat(left(v), right(v)))
LESS_LEAVES(u, v) → IF1(isLeaf(u), isLeaf(v), u, v)
IF1(b, false, u, v) → IF2(b, u, v)

The TRS R consists of the following rules:

isLeaf(leaf) → true
isLeaf(cons(u, v)) → false
left(cons(u, v)) → u
right(cons(u, v)) → v
concat(leaf, y) → y
concat(cons(u, v), y) → cons(u, concat(v, y))
less_leaves(u, v) → if1(isLeaf(u), isLeaf(v), u, v)
if1(b, true, u, v) → false
if1(b, false, u, v) → if2(b, u, v)
if2(true, u, v) → true
if2(false, u, v) → less_leaves(concat(left(u), right(u)), concat(left(v), right(v)))

The set Q consists of the following terms:

isLeaf(leaf)
isLeaf(cons(x0, x1))
left(cons(x0, x1))
right(cons(x0, x1))
concat(leaf, x0)
concat(cons(x0, x1), x2)
less_leaves(x0, x1)
if1(x0, true, x1, x2)
if1(x0, false, x1, x2)
if2(true, x0, x1)
if2(false, x0, x1)

We have to consider all minimal (P,Q,R)-chains.