The Runtime Complexity (full) of the given CpxTRS could be proven to be BOUNDS(n^1, INF).

(0) Obligation:

Runtime Complexity TRS:
The TRS R consists of the following rules:

active(and(true, X)) → mark(X)
active(and(false, Y)) → mark(false)
active(if(true, X, Y)) → mark(X)
active(if(false, X, Y)) → mark(Y)
active(add(0, X)) → mark(X)
active(add(s(X), Y)) → mark(s(add(X, Y)))
active(first(0, X)) → mark(nil)
active(first(s(X), cons(Y, Z))) → mark(cons(Y, first(X, Z)))
active(from(X)) → mark(cons(X, from(s(X))))
active(and(X1, X2)) → and(active(X1), X2)
active(if(X1, X2, X3)) → if(active(X1), X2, X3)
active(add(X1, X2)) → add(active(X1), X2)
active(first(X1, X2)) → first(active(X1), X2)
active(first(X1, X2)) → first(X1, active(X2))
and(mark(X1), X2) → mark(and(X1, X2))
if(mark(X1), X2, X3) → mark(if(X1, X2, X3))
add(mark(X1), X2) → mark(add(X1, X2))
first(mark(X1), X2) → mark(first(X1, X2))
first(X1, mark(X2)) → mark(first(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(true) → ok(true)
proper(false) → ok(false)
proper(if(X1, X2, X3)) → if(proper(X1), proper(X2), proper(X3))
proper(add(X1, X2)) → add(proper(X1), proper(X2))
proper(0) → ok(0)
proper(s(X)) → s(proper(X))
proper(first(X1, X2)) → first(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(from(X)) → from(proper(X))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
if(ok(X1), ok(X2), ok(X3)) → ok(if(X1, X2, X3))
add(ok(X1), ok(X2)) → ok(add(X1, X2))
s(ok(X)) → ok(s(X))
first(ok(X1), ok(X2)) → ok(first(X1, X2))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
from(ok(X)) → ok(from(X))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Rewrite Strategy: FULL

(1) DecreasingLoopProof (EQUIVALENT transformation)

The following loop(s) give(s) rise to the lower bound Ω(n¹):
The rewrite sequence
and(mark(X1), X2) →⁺ mark(and(X1, X2))
gives rise to a decreasing loop by considering the right hand sides subterm at position [0].
The pumping substitution is [X1 / mark(X1)].
The result substitution is [ ].

(2) BOUNDS(n^1, INF)

(3) RenamingProof (EQUIVALENT transformation)

Renamed function symbols to avoid clashes with predefined symbol.

(4) Obligation:

Runtime Complexity Relative TRS:
The TRS R consists of the following rules:

active(and(true, X)) → mark(X)
active(and(false, Y)) → mark(false)
active(if(true, X, Y)) → mark(X)
active(if(false, X, Y)) → mark(Y)
active(add(0', X)) → mark(X)
active(add(s(X), Y)) → mark(s(add(X, Y)))
active(first(0', X)) → mark(nil)
active(first(s(X), cons(Y, Z))) → mark(cons(Y, first(X, Z)))
active(from(X)) → mark(cons(X, from(s(X))))
active(and(X1, X2)) → and(active(X1), X2)
active(if(X1, X2, X3)) → if(active(X1), X2, X3)
active(add(X1, X2)) → add(active(X1), X2)
active(first(X1, X2)) → first(active(X1), X2)
active(first(X1, X2)) → first(X1, active(X2))
and(mark(X1), X2) → mark(and(X1, X2))
if(mark(X1), X2, X3) → mark(if(X1, X2, X3))
add(mark(X1), X2) → mark(add(X1, X2))
first(mark(X1), X2) → mark(first(X1, X2))
first(X1, mark(X2)) → mark(first(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(true) → ok(true)
proper(false) → ok(false)
proper(if(X1, X2, X3)) → if(proper(X1), proper(X2), proper(X3))
proper(add(X1, X2)) → add(proper(X1), proper(X2))
proper(0') → ok(0')
proper(s(X)) → s(proper(X))
proper(first(X1, X2)) → first(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(from(X)) → from(proper(X))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
if(ok(X1), ok(X2), ok(X3)) → ok(if(X1, X2, X3))
add(ok(X1), ok(X2)) → ok(add(X1, X2))
s(ok(X)) → ok(s(X))
first(ok(X1), ok(X2)) → ok(first(X1, X2))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
from(ok(X)) → ok(from(X))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

S is empty.
Rewrite Strategy: FULL

(5) TypeInferenceProof (BOTH BOUNDS(ID, ID) transformation)

Infered types.

(6) Obligation:

TRS:
Rules:
active(and(true, X)) → mark(X)
active(and(false, Y)) → mark(false)
active(if(true, X, Y)) → mark(X)
active(if(false, X, Y)) → mark(Y)
active(add(0', X)) → mark(X)
active(add(s(X), Y)) → mark(s(add(X, Y)))
active(first(0', X)) → mark(nil)
active(first(s(X), cons(Y, Z))) → mark(cons(Y, first(X, Z)))
active(from(X)) → mark(cons(X, from(s(X))))
active(and(X1, X2)) → and(active(X1), X2)
active(if(X1, X2, X3)) → if(active(X1), X2, X3)
active(add(X1, X2)) → add(active(X1), X2)
active(first(X1, X2)) → first(active(X1), X2)
active(first(X1, X2)) → first(X1, active(X2))
and(mark(X1), X2) → mark(and(X1, X2))
if(mark(X1), X2, X3) → mark(if(X1, X2, X3))
add(mark(X1), X2) → mark(add(X1, X2))
first(mark(X1), X2) → mark(first(X1, X2))
first(X1, mark(X2)) → mark(first(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(true) → ok(true)
proper(false) → ok(false)
proper(if(X1, X2, X3)) → if(proper(X1), proper(X2), proper(X3))
proper(add(X1, X2)) → add(proper(X1), proper(X2))
proper(0') → ok(0')
proper(s(X)) → s(proper(X))
proper(first(X1, X2)) → first(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(from(X)) → from(proper(X))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
if(ok(X1), ok(X2), ok(X3)) → ok(if(X1, X2, X3))
add(ok(X1), ok(X2)) → ok(add(X1, X2))
s(ok(X)) → ok(s(X))
first(ok(X1), ok(X2)) → ok(first(X1, X2))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
from(ok(X)) → ok(from(X))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Types:
active :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
and :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
true :: true:mark:false:0':nil:ok
mark :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
false :: true:mark:false:0':nil:ok
if :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
add :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
0' :: true:mark:false:0':nil:ok
s :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
first :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
nil :: true:mark:false:0':nil:ok
cons :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
from :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
proper :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
ok :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
top :: true:mark:false:0':nil:ok → top
hole_true:mark:false:0':nil:ok1_0 :: true:mark:false:0':nil:ok
hole_top2_0 :: top
gen_true:mark:false:0':nil:ok3_0 :: Nat → true:mark:false:0':nil:ok

(7) OrderProof (LOWER BOUND(ID) transformation)

Heuristically decided to analyse the following defined symbols:
active, s, add, cons, first, from, and, if, proper, top

They will be analysed ascendingly in the following order:
s < active
add < active
cons < active
first < active
from < active
and < active
if < active
active < top
s < proper
add < proper
cons < proper
first < proper
from < proper
and < proper
if < proper
proper < top

(8) Obligation:

TRS:
Rules:
active(and(true, X)) → mark(X)
active(and(false, Y)) → mark(false)
active(if(true, X, Y)) → mark(X)
active(if(false, X, Y)) → mark(Y)
active(add(0', X)) → mark(X)
active(add(s(X), Y)) → mark(s(add(X, Y)))
active(first(0', X)) → mark(nil)
active(first(s(X), cons(Y, Z))) → mark(cons(Y, first(X, Z)))
active(from(X)) → mark(cons(X, from(s(X))))
active(and(X1, X2)) → and(active(X1), X2)
active(if(X1, X2, X3)) → if(active(X1), X2, X3)
active(add(X1, X2)) → add(active(X1), X2)
active(first(X1, X2)) → first(active(X1), X2)
active(first(X1, X2)) → first(X1, active(X2))
and(mark(X1), X2) → mark(and(X1, X2))
if(mark(X1), X2, X3) → mark(if(X1, X2, X3))
add(mark(X1), X2) → mark(add(X1, X2))
first(mark(X1), X2) → mark(first(X1, X2))
first(X1, mark(X2)) → mark(first(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(true) → ok(true)
proper(false) → ok(false)
proper(if(X1, X2, X3)) → if(proper(X1), proper(X2), proper(X3))
proper(add(X1, X2)) → add(proper(X1), proper(X2))
proper(0') → ok(0')
proper(s(X)) → s(proper(X))
proper(first(X1, X2)) → first(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(from(X)) → from(proper(X))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
if(ok(X1), ok(X2), ok(X3)) → ok(if(X1, X2, X3))
add(ok(X1), ok(X2)) → ok(add(X1, X2))
s(ok(X)) → ok(s(X))
first(ok(X1), ok(X2)) → ok(first(X1, X2))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
from(ok(X)) → ok(from(X))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Types:
active :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
and :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
true :: true:mark:false:0':nil:ok
mark :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
false :: true:mark:false:0':nil:ok
if :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
add :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
0' :: true:mark:false:0':nil:ok
s :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
first :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
nil :: true:mark:false:0':nil:ok
cons :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
from :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
proper :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
ok :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
top :: true:mark:false:0':nil:ok → top
hole_true:mark:false:0':nil:ok1_0 :: true:mark:false:0':nil:ok
hole_top2_0 :: top
gen_true:mark:false:0':nil:ok3_0 :: Nat → true:mark:false:0':nil:ok

Generator Equations:
gen_true:mark:false:0':nil:ok3_0(0) ⇔ true
gen_true:mark:false:0':nil:ok3_0(+(x, 1)) ⇔ mark(gen_true:mark:false:0':nil:ok3_0(x))

The following defined symbols remain to be analysed:
s, active, add, cons, first, from, and, if, proper, top

They will be analysed ascendingly in the following order:
s < active
add < active
cons < active
first < active
from < active
and < active
if < active
active < top
s < proper
add < proper
cons < proper
first < proper
from < proper
and < proper
if < proper
proper < top

(9) NoRewriteLemmaProof (LOWER BOUND(ID) transformation)

Could not prove a rewrite lemma for the defined symbol s.

(10) Obligation:

TRS:
Rules:
active(and(true, X)) → mark(X)
active(and(false, Y)) → mark(false)
active(if(true, X, Y)) → mark(X)
active(if(false, X, Y)) → mark(Y)
active(add(0', X)) → mark(X)
active(add(s(X), Y)) → mark(s(add(X, Y)))
active(first(0', X)) → mark(nil)
active(first(s(X), cons(Y, Z))) → mark(cons(Y, first(X, Z)))
active(from(X)) → mark(cons(X, from(s(X))))
active(and(X1, X2)) → and(active(X1), X2)
active(if(X1, X2, X3)) → if(active(X1), X2, X3)
active(add(X1, X2)) → add(active(X1), X2)
active(first(X1, X2)) → first(active(X1), X2)
active(first(X1, X2)) → first(X1, active(X2))
and(mark(X1), X2) → mark(and(X1, X2))
if(mark(X1), X2, X3) → mark(if(X1, X2, X3))
add(mark(X1), X2) → mark(add(X1, X2))
first(mark(X1), X2) → mark(first(X1, X2))
first(X1, mark(X2)) → mark(first(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(true) → ok(true)
proper(false) → ok(false)
proper(if(X1, X2, X3)) → if(proper(X1), proper(X2), proper(X3))
proper(add(X1, X2)) → add(proper(X1), proper(X2))
proper(0') → ok(0')
proper(s(X)) → s(proper(X))
proper(first(X1, X2)) → first(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(from(X)) → from(proper(X))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
if(ok(X1), ok(X2), ok(X3)) → ok(if(X1, X2, X3))
add(ok(X1), ok(X2)) → ok(add(X1, X2))
s(ok(X)) → ok(s(X))
first(ok(X1), ok(X2)) → ok(first(X1, X2))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
from(ok(X)) → ok(from(X))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Types:
active :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
and :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
true :: true:mark:false:0':nil:ok
mark :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
false :: true:mark:false:0':nil:ok
if :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
add :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
0' :: true:mark:false:0':nil:ok
s :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
first :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
nil :: true:mark:false:0':nil:ok
cons :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
from :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
proper :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
ok :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
top :: true:mark:false:0':nil:ok → top
hole_true:mark:false:0':nil:ok1_0 :: true:mark:false:0':nil:ok
hole_top2_0 :: top
gen_true:mark:false:0':nil:ok3_0 :: Nat → true:mark:false:0':nil:ok

Generator Equations:
gen_true:mark:false:0':nil:ok3_0(0) ⇔ true
gen_true:mark:false:0':nil:ok3_0(+(x, 1)) ⇔ mark(gen_true:mark:false:0':nil:ok3_0(x))

The following defined symbols remain to be analysed:
add, active, cons, first, from, and, if, proper, top

They will be analysed ascendingly in the following order:
add < active
cons < active
first < active
from < active
and < active
if < active
active < top
add < proper
cons < proper
first < proper
from < proper
and < proper
if < proper
proper < top

(11) NoRewriteLemmaProof (LOWER BOUND(ID) transformation)

Could not prove a rewrite lemma for the defined symbol add.

(12) Obligation:

TRS:
Rules:
active(and(true, X)) → mark(X)
active(and(false, Y)) → mark(false)
active(if(true, X, Y)) → mark(X)
active(if(false, X, Y)) → mark(Y)
active(add(0', X)) → mark(X)
active(add(s(X), Y)) → mark(s(add(X, Y)))
active(first(0', X)) → mark(nil)
active(first(s(X), cons(Y, Z))) → mark(cons(Y, first(X, Z)))
active(from(X)) → mark(cons(X, from(s(X))))
active(and(X1, X2)) → and(active(X1), X2)
active(if(X1, X2, X3)) → if(active(X1), X2, X3)
active(add(X1, X2)) → add(active(X1), X2)
active(first(X1, X2)) → first(active(X1), X2)
active(first(X1, X2)) → first(X1, active(X2))
and(mark(X1), X2) → mark(and(X1, X2))
if(mark(X1), X2, X3) → mark(if(X1, X2, X3))
add(mark(X1), X2) → mark(add(X1, X2))
first(mark(X1), X2) → mark(first(X1, X2))
first(X1, mark(X2)) → mark(first(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(true) → ok(true)
proper(false) → ok(false)
proper(if(X1, X2, X3)) → if(proper(X1), proper(X2), proper(X3))
proper(add(X1, X2)) → add(proper(X1), proper(X2))
proper(0') → ok(0')
proper(s(X)) → s(proper(X))
proper(first(X1, X2)) → first(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(from(X)) → from(proper(X))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
if(ok(X1), ok(X2), ok(X3)) → ok(if(X1, X2, X3))
add(ok(X1), ok(X2)) → ok(add(X1, X2))
s(ok(X)) → ok(s(X))
first(ok(X1), ok(X2)) → ok(first(X1, X2))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
from(ok(X)) → ok(from(X))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Types:
active :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
and :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
true :: true:mark:false:0':nil:ok
mark :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
false :: true:mark:false:0':nil:ok
if :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
add :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
0' :: true:mark:false:0':nil:ok
s :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
first :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
nil :: true:mark:false:0':nil:ok
cons :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
from :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
proper :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
ok :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
top :: true:mark:false:0':nil:ok → top
hole_true:mark:false:0':nil:ok1_0 :: true:mark:false:0':nil:ok
hole_top2_0 :: top
gen_true:mark:false:0':nil:ok3_0 :: Nat → true:mark:false:0':nil:ok

Generator Equations:
gen_true:mark:false:0':nil:ok3_0(0) ⇔ true
gen_true:mark:false:0':nil:ok3_0(+(x, 1)) ⇔ mark(gen_true:mark:false:0':nil:ok3_0(x))

The following defined symbols remain to be analysed:
cons, active, first, from, and, if, proper, top

They will be analysed ascendingly in the following order:
cons < active
first < active
from < active
and < active
if < active
active < top
cons < proper
first < proper
from < proper
and < proper
if < proper
proper < top

(13) NoRewriteLemmaProof (LOWER BOUND(ID) transformation)

Could not prove a rewrite lemma for the defined symbol cons.

(14) Obligation:

TRS:
Rules:
active(and(true, X)) → mark(X)
active(and(false, Y)) → mark(false)
active(if(true, X, Y)) → mark(X)
active(if(false, X, Y)) → mark(Y)
active(add(0', X)) → mark(X)
active(add(s(X), Y)) → mark(s(add(X, Y)))
active(first(0', X)) → mark(nil)
active(first(s(X), cons(Y, Z))) → mark(cons(Y, first(X, Z)))
active(from(X)) → mark(cons(X, from(s(X))))
active(and(X1, X2)) → and(active(X1), X2)
active(if(X1, X2, X3)) → if(active(X1), X2, X3)
active(add(X1, X2)) → add(active(X1), X2)
active(first(X1, X2)) → first(active(X1), X2)
active(first(X1, X2)) → first(X1, active(X2))
and(mark(X1), X2) → mark(and(X1, X2))
if(mark(X1), X2, X3) → mark(if(X1, X2, X3))
add(mark(X1), X2) → mark(add(X1, X2))
first(mark(X1), X2) → mark(first(X1, X2))
first(X1, mark(X2)) → mark(first(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(true) → ok(true)
proper(false) → ok(false)
proper(if(X1, X2, X3)) → if(proper(X1), proper(X2), proper(X3))
proper(add(X1, X2)) → add(proper(X1), proper(X2))
proper(0') → ok(0')
proper(s(X)) → s(proper(X))
proper(first(X1, X2)) → first(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(from(X)) → from(proper(X))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
if(ok(X1), ok(X2), ok(X3)) → ok(if(X1, X2, X3))
add(ok(X1), ok(X2)) → ok(add(X1, X2))
s(ok(X)) → ok(s(X))
first(ok(X1), ok(X2)) → ok(first(X1, X2))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
from(ok(X)) → ok(from(X))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Types:
active :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
and :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
true :: true:mark:false:0':nil:ok
mark :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
false :: true:mark:false:0':nil:ok
if :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
add :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
0' :: true:mark:false:0':nil:ok
s :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
first :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
nil :: true:mark:false:0':nil:ok
cons :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
from :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
proper :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
ok :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
top :: true:mark:false:0':nil:ok → top
hole_true:mark:false:0':nil:ok1_0 :: true:mark:false:0':nil:ok
hole_top2_0 :: top
gen_true:mark:false:0':nil:ok3_0 :: Nat → true:mark:false:0':nil:ok

Generator Equations:
gen_true:mark:false:0':nil:ok3_0(0) ⇔ true
gen_true:mark:false:0':nil:ok3_0(+(x, 1)) ⇔ mark(gen_true:mark:false:0':nil:ok3_0(x))

The following defined symbols remain to be analysed:
first, active, from, and, if, proper, top

They will be analysed ascendingly in the following order:
first < active
from < active
and < active
if < active
active < top
first < proper
from < proper
and < proper
if < proper
proper < top

(15) NoRewriteLemmaProof (LOWER BOUND(ID) transformation)

Could not prove a rewrite lemma for the defined symbol first.

(16) Obligation:

TRS:
Rules:
active(and(true, X)) → mark(X)
active(and(false, Y)) → mark(false)
active(if(true, X, Y)) → mark(X)
active(if(false, X, Y)) → mark(Y)
active(add(0', X)) → mark(X)
active(add(s(X), Y)) → mark(s(add(X, Y)))
active(first(0', X)) → mark(nil)
active(first(s(X), cons(Y, Z))) → mark(cons(Y, first(X, Z)))
active(from(X)) → mark(cons(X, from(s(X))))
active(and(X1, X2)) → and(active(X1), X2)
active(if(X1, X2, X3)) → if(active(X1), X2, X3)
active(add(X1, X2)) → add(active(X1), X2)
active(first(X1, X2)) → first(active(X1), X2)
active(first(X1, X2)) → first(X1, active(X2))
and(mark(X1), X2) → mark(and(X1, X2))
if(mark(X1), X2, X3) → mark(if(X1, X2, X3))
add(mark(X1), X2) → mark(add(X1, X2))
first(mark(X1), X2) → mark(first(X1, X2))
first(X1, mark(X2)) → mark(first(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(true) → ok(true)
proper(false) → ok(false)
proper(if(X1, X2, X3)) → if(proper(X1), proper(X2), proper(X3))
proper(add(X1, X2)) → add(proper(X1), proper(X2))
proper(0') → ok(0')
proper(s(X)) → s(proper(X))
proper(first(X1, X2)) → first(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(from(X)) → from(proper(X))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
if(ok(X1), ok(X2), ok(X3)) → ok(if(X1, X2, X3))
add(ok(X1), ok(X2)) → ok(add(X1, X2))
s(ok(X)) → ok(s(X))
first(ok(X1), ok(X2)) → ok(first(X1, X2))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
from(ok(X)) → ok(from(X))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Types:
active :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
and :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
true :: true:mark:false:0':nil:ok
mark :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
false :: true:mark:false:0':nil:ok
if :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
add :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
0' :: true:mark:false:0':nil:ok
s :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
first :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
nil :: true:mark:false:0':nil:ok
cons :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
from :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
proper :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
ok :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
top :: true:mark:false:0':nil:ok → top
hole_true:mark:false:0':nil:ok1_0 :: true:mark:false:0':nil:ok
hole_top2_0 :: top
gen_true:mark:false:0':nil:ok3_0 :: Nat → true:mark:false:0':nil:ok

Generator Equations:
gen_true:mark:false:0':nil:ok3_0(0) ⇔ true
gen_true:mark:false:0':nil:ok3_0(+(x, 1)) ⇔ mark(gen_true:mark:false:0':nil:ok3_0(x))

The following defined symbols remain to be analysed:
from, active, and, if, proper, top

They will be analysed ascendingly in the following order:
from < active
and < active
if < active
active < top
from < proper
and < proper
if < proper
proper < top

(17) NoRewriteLemmaProof (LOWER BOUND(ID) transformation)

Could not prove a rewrite lemma for the defined symbol from.

(18) Obligation:

TRS:
Rules:
active(and(true, X)) → mark(X)
active(and(false, Y)) → mark(false)
active(if(true, X, Y)) → mark(X)
active(if(false, X, Y)) → mark(Y)
active(add(0', X)) → mark(X)
active(add(s(X), Y)) → mark(s(add(X, Y)))
active(first(0', X)) → mark(nil)
active(first(s(X), cons(Y, Z))) → mark(cons(Y, first(X, Z)))
active(from(X)) → mark(cons(X, from(s(X))))
active(and(X1, X2)) → and(active(X1), X2)
active(if(X1, X2, X3)) → if(active(X1), X2, X3)
active(add(X1, X2)) → add(active(X1), X2)
active(first(X1, X2)) → first(active(X1), X2)
active(first(X1, X2)) → first(X1, active(X2))
and(mark(X1), X2) → mark(and(X1, X2))
if(mark(X1), X2, X3) → mark(if(X1, X2, X3))
add(mark(X1), X2) → mark(add(X1, X2))
first(mark(X1), X2) → mark(first(X1, X2))
first(X1, mark(X2)) → mark(first(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(true) → ok(true)
proper(false) → ok(false)
proper(if(X1, X2, X3)) → if(proper(X1), proper(X2), proper(X3))
proper(add(X1, X2)) → add(proper(X1), proper(X2))
proper(0') → ok(0')
proper(s(X)) → s(proper(X))
proper(first(X1, X2)) → first(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(from(X)) → from(proper(X))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
if(ok(X1), ok(X2), ok(X3)) → ok(if(X1, X2, X3))
add(ok(X1), ok(X2)) → ok(add(X1, X2))
s(ok(X)) → ok(s(X))
first(ok(X1), ok(X2)) → ok(first(X1, X2))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
from(ok(X)) → ok(from(X))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Types:
active :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
and :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
true :: true:mark:false:0':nil:ok
mark :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
false :: true:mark:false:0':nil:ok
if :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
add :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
0' :: true:mark:false:0':nil:ok
s :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
first :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
nil :: true:mark:false:0':nil:ok
cons :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
from :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
proper :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
ok :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
top :: true:mark:false:0':nil:ok → top
hole_true:mark:false:0':nil:ok1_0 :: true:mark:false:0':nil:ok
hole_top2_0 :: top
gen_true:mark:false:0':nil:ok3_0 :: Nat → true:mark:false:0':nil:ok

Generator Equations:
gen_true:mark:false:0':nil:ok3_0(0) ⇔ true
gen_true:mark:false:0':nil:ok3_0(+(x, 1)) ⇔ mark(gen_true:mark:false:0':nil:ok3_0(x))

The following defined symbols remain to be analysed:
and, active, if, proper, top

They will be analysed ascendingly in the following order:
and < active
if < active
active < top
and < proper
if < proper
proper < top

(19) NoRewriteLemmaProof (LOWER BOUND(ID) transformation)

Could not prove a rewrite lemma for the defined symbol and.

(20) Obligation:

TRS:
Rules:
active(and(true, X)) → mark(X)
active(and(false, Y)) → mark(false)
active(if(true, X, Y)) → mark(X)
active(if(false, X, Y)) → mark(Y)
active(add(0', X)) → mark(X)
active(add(s(X), Y)) → mark(s(add(X, Y)))
active(first(0', X)) → mark(nil)
active(first(s(X), cons(Y, Z))) → mark(cons(Y, first(X, Z)))
active(from(X)) → mark(cons(X, from(s(X))))
active(and(X1, X2)) → and(active(X1), X2)
active(if(X1, X2, X3)) → if(active(X1), X2, X3)
active(add(X1, X2)) → add(active(X1), X2)
active(first(X1, X2)) → first(active(X1), X2)
active(first(X1, X2)) → first(X1, active(X2))
and(mark(X1), X2) → mark(and(X1, X2))
if(mark(X1), X2, X3) → mark(if(X1, X2, X3))
add(mark(X1), X2) → mark(add(X1, X2))
first(mark(X1), X2) → mark(first(X1, X2))
first(X1, mark(X2)) → mark(first(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(true) → ok(true)
proper(false) → ok(false)
proper(if(X1, X2, X3)) → if(proper(X1), proper(X2), proper(X3))
proper(add(X1, X2)) → add(proper(X1), proper(X2))
proper(0') → ok(0')
proper(s(X)) → s(proper(X))
proper(first(X1, X2)) → first(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(from(X)) → from(proper(X))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
if(ok(X1), ok(X2), ok(X3)) → ok(if(X1, X2, X3))
add(ok(X1), ok(X2)) → ok(add(X1, X2))
s(ok(X)) → ok(s(X))
first(ok(X1), ok(X2)) → ok(first(X1, X2))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
from(ok(X)) → ok(from(X))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Types:
active :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
and :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
true :: true:mark:false:0':nil:ok
mark :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
false :: true:mark:false:0':nil:ok
if :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
add :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
0' :: true:mark:false:0':nil:ok
s :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
first :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
nil :: true:mark:false:0':nil:ok
cons :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
from :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
proper :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
ok :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
top :: true:mark:false:0':nil:ok → top
hole_true:mark:false:0':nil:ok1_0 :: true:mark:false:0':nil:ok
hole_top2_0 :: top
gen_true:mark:false:0':nil:ok3_0 :: Nat → true:mark:false:0':nil:ok

Generator Equations:
gen_true:mark:false:0':nil:ok3_0(0) ⇔ true
gen_true:mark:false:0':nil:ok3_0(+(x, 1)) ⇔ mark(gen_true:mark:false:0':nil:ok3_0(x))

The following defined symbols remain to be analysed:
if, active, proper, top

They will be analysed ascendingly in the following order:
if < active
active < top
if < proper
proper < top

(21) NoRewriteLemmaProof (LOWER BOUND(ID) transformation)

Could not prove a rewrite lemma for the defined symbol if.

(22) Obligation:

TRS:
Rules:
active(and(true, X)) → mark(X)
active(and(false, Y)) → mark(false)
active(if(true, X, Y)) → mark(X)
active(if(false, X, Y)) → mark(Y)
active(add(0', X)) → mark(X)
active(add(s(X), Y)) → mark(s(add(X, Y)))
active(first(0', X)) → mark(nil)
active(first(s(X), cons(Y, Z))) → mark(cons(Y, first(X, Z)))
active(from(X)) → mark(cons(X, from(s(X))))
active(and(X1, X2)) → and(active(X1), X2)
active(if(X1, X2, X3)) → if(active(X1), X2, X3)
active(add(X1, X2)) → add(active(X1), X2)
active(first(X1, X2)) → first(active(X1), X2)
active(first(X1, X2)) → first(X1, active(X2))
and(mark(X1), X2) → mark(and(X1, X2))
if(mark(X1), X2, X3) → mark(if(X1, X2, X3))
add(mark(X1), X2) → mark(add(X1, X2))
first(mark(X1), X2) → mark(first(X1, X2))
first(X1, mark(X2)) → mark(first(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(true) → ok(true)
proper(false) → ok(false)
proper(if(X1, X2, X3)) → if(proper(X1), proper(X2), proper(X3))
proper(add(X1, X2)) → add(proper(X1), proper(X2))
proper(0') → ok(0')
proper(s(X)) → s(proper(X))
proper(first(X1, X2)) → first(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(from(X)) → from(proper(X))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
if(ok(X1), ok(X2), ok(X3)) → ok(if(X1, X2, X3))
add(ok(X1), ok(X2)) → ok(add(X1, X2))
s(ok(X)) → ok(s(X))
first(ok(X1), ok(X2)) → ok(first(X1, X2))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
from(ok(X)) → ok(from(X))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Types:
active :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
and :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
true :: true:mark:false:0':nil:ok
mark :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
false :: true:mark:false:0':nil:ok
if :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
add :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
0' :: true:mark:false:0':nil:ok
s :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
first :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
nil :: true:mark:false:0':nil:ok
cons :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
from :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
proper :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
ok :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
top :: true:mark:false:0':nil:ok → top
hole_true:mark:false:0':nil:ok1_0 :: true:mark:false:0':nil:ok
hole_top2_0 :: top
gen_true:mark:false:0':nil:ok3_0 :: Nat → true:mark:false:0':nil:ok

Generator Equations:
gen_true:mark:false:0':nil:ok3_0(0) ⇔ true
gen_true:mark:false:0':nil:ok3_0(+(x, 1)) ⇔ mark(gen_true:mark:false:0':nil:ok3_0(x))

The following defined symbols remain to be analysed:
active, proper, top

They will be analysed ascendingly in the following order:
active < top
proper < top

(23) NoRewriteLemmaProof (LOWER BOUND(ID) transformation)

Could not prove a rewrite lemma for the defined symbol active.

(24) Obligation:

TRS:
Rules:
active(and(true, X)) → mark(X)
active(and(false, Y)) → mark(false)
active(if(true, X, Y)) → mark(X)
active(if(false, X, Y)) → mark(Y)
active(add(0', X)) → mark(X)
active(add(s(X), Y)) → mark(s(add(X, Y)))
active(first(0', X)) → mark(nil)
active(first(s(X), cons(Y, Z))) → mark(cons(Y, first(X, Z)))
active(from(X)) → mark(cons(X, from(s(X))))
active(and(X1, X2)) → and(active(X1), X2)
active(if(X1, X2, X3)) → if(active(X1), X2, X3)
active(add(X1, X2)) → add(active(X1), X2)
active(first(X1, X2)) → first(active(X1), X2)
active(first(X1, X2)) → first(X1, active(X2))
and(mark(X1), X2) → mark(and(X1, X2))
if(mark(X1), X2, X3) → mark(if(X1, X2, X3))
add(mark(X1), X2) → mark(add(X1, X2))
first(mark(X1), X2) → mark(first(X1, X2))
first(X1, mark(X2)) → mark(first(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(true) → ok(true)
proper(false) → ok(false)
proper(if(X1, X2, X3)) → if(proper(X1), proper(X2), proper(X3))
proper(add(X1, X2)) → add(proper(X1), proper(X2))
proper(0') → ok(0')
proper(s(X)) → s(proper(X))
proper(first(X1, X2)) → first(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(from(X)) → from(proper(X))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
if(ok(X1), ok(X2), ok(X3)) → ok(if(X1, X2, X3))
add(ok(X1), ok(X2)) → ok(add(X1, X2))
s(ok(X)) → ok(s(X))
first(ok(X1), ok(X2)) → ok(first(X1, X2))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
from(ok(X)) → ok(from(X))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Types:
active :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
and :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
true :: true:mark:false:0':nil:ok
mark :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
false :: true:mark:false:0':nil:ok
if :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
add :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
0' :: true:mark:false:0':nil:ok
s :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
first :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
nil :: true:mark:false:0':nil:ok
cons :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
from :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
proper :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
ok :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
top :: true:mark:false:0':nil:ok → top
hole_true:mark:false:0':nil:ok1_0 :: true:mark:false:0':nil:ok
hole_top2_0 :: top
gen_true:mark:false:0':nil:ok3_0 :: Nat → true:mark:false:0':nil:ok

Generator Equations:
gen_true:mark:false:0':nil:ok3_0(0) ⇔ true
gen_true:mark:false:0':nil:ok3_0(+(x, 1)) ⇔ mark(gen_true:mark:false:0':nil:ok3_0(x))

The following defined symbols remain to be analysed:
proper, top

They will be analysed ascendingly in the following order:
proper < top

(25) NoRewriteLemmaProof (LOWER BOUND(ID) transformation)

Could not prove a rewrite lemma for the defined symbol proper.

(26) Obligation:

TRS:
Rules:
active(and(true, X)) → mark(X)
active(and(false, Y)) → mark(false)
active(if(true, X, Y)) → mark(X)
active(if(false, X, Y)) → mark(Y)
active(add(0', X)) → mark(X)
active(add(s(X), Y)) → mark(s(add(X, Y)))
active(first(0', X)) → mark(nil)
active(first(s(X), cons(Y, Z))) → mark(cons(Y, first(X, Z)))
active(from(X)) → mark(cons(X, from(s(X))))
active(and(X1, X2)) → and(active(X1), X2)
active(if(X1, X2, X3)) → if(active(X1), X2, X3)
active(add(X1, X2)) → add(active(X1), X2)
active(first(X1, X2)) → first(active(X1), X2)
active(first(X1, X2)) → first(X1, active(X2))
and(mark(X1), X2) → mark(and(X1, X2))
if(mark(X1), X2, X3) → mark(if(X1, X2, X3))
add(mark(X1), X2) → mark(add(X1, X2))
first(mark(X1), X2) → mark(first(X1, X2))
first(X1, mark(X2)) → mark(first(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(true) → ok(true)
proper(false) → ok(false)
proper(if(X1, X2, X3)) → if(proper(X1), proper(X2), proper(X3))
proper(add(X1, X2)) → add(proper(X1), proper(X2))
proper(0') → ok(0')
proper(s(X)) → s(proper(X))
proper(first(X1, X2)) → first(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(from(X)) → from(proper(X))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
if(ok(X1), ok(X2), ok(X3)) → ok(if(X1, X2, X3))
add(ok(X1), ok(X2)) → ok(add(X1, X2))
s(ok(X)) → ok(s(X))
first(ok(X1), ok(X2)) → ok(first(X1, X2))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
from(ok(X)) → ok(from(X))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Types:
active :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
and :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
true :: true:mark:false:0':nil:ok
mark :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
false :: true:mark:false:0':nil:ok
if :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
add :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
0' :: true:mark:false:0':nil:ok
s :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
first :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
nil :: true:mark:false:0':nil:ok
cons :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
from :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
proper :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
ok :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
top :: true:mark:false:0':nil:ok → top
hole_true:mark:false:0':nil:ok1_0 :: true:mark:false:0':nil:ok
hole_top2_0 :: top
gen_true:mark:false:0':nil:ok3_0 :: Nat → true:mark:false:0':nil:ok

Generator Equations:
gen_true:mark:false:0':nil:ok3_0(0) ⇔ true
gen_true:mark:false:0':nil:ok3_0(+(x, 1)) ⇔ mark(gen_true:mark:false:0':nil:ok3_0(x))

The following defined symbols remain to be analysed:
top

(27) NoRewriteLemmaProof (LOWER BOUND(ID) transformation)

Could not prove a rewrite lemma for the defined symbol top.

(28) Obligation:

TRS:
Rules:
active(and(true, X)) → mark(X)
active(and(false, Y)) → mark(false)
active(if(true, X, Y)) → mark(X)
active(if(false, X, Y)) → mark(Y)
active(add(0', X)) → mark(X)
active(add(s(X), Y)) → mark(s(add(X, Y)))
active(first(0', X)) → mark(nil)
active(first(s(X), cons(Y, Z))) → mark(cons(Y, first(X, Z)))
active(from(X)) → mark(cons(X, from(s(X))))
active(and(X1, X2)) → and(active(X1), X2)
active(if(X1, X2, X3)) → if(active(X1), X2, X3)
active(add(X1, X2)) → add(active(X1), X2)
active(first(X1, X2)) → first(active(X1), X2)
active(first(X1, X2)) → first(X1, active(X2))
and(mark(X1), X2) → mark(and(X1, X2))
if(mark(X1), X2, X3) → mark(if(X1, X2, X3))
add(mark(X1), X2) → mark(add(X1, X2))
first(mark(X1), X2) → mark(first(X1, X2))
first(X1, mark(X2)) → mark(first(X1, X2))
proper(and(X1, X2)) → and(proper(X1), proper(X2))
proper(true) → ok(true)
proper(false) → ok(false)
proper(if(X1, X2, X3)) → if(proper(X1), proper(X2), proper(X3))
proper(add(X1, X2)) → add(proper(X1), proper(X2))
proper(0') → ok(0')
proper(s(X)) → s(proper(X))
proper(first(X1, X2)) → first(proper(X1), proper(X2))
proper(nil) → ok(nil)
proper(cons(X1, X2)) → cons(proper(X1), proper(X2))
proper(from(X)) → from(proper(X))
and(ok(X1), ok(X2)) → ok(and(X1, X2))
if(ok(X1), ok(X2), ok(X3)) → ok(if(X1, X2, X3))
add(ok(X1), ok(X2)) → ok(add(X1, X2))
s(ok(X)) → ok(s(X))
first(ok(X1), ok(X2)) → ok(first(X1, X2))
cons(ok(X1), ok(X2)) → ok(cons(X1, X2))
from(ok(X)) → ok(from(X))
top(mark(X)) → top(proper(X))
top(ok(X)) → top(active(X))

Types:
active :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
and :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
true :: true:mark:false:0':nil:ok
mark :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
false :: true:mark:false:0':nil:ok
if :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
add :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
0' :: true:mark:false:0':nil:ok
s :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
first :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
nil :: true:mark:false:0':nil:ok
cons :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
from :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
proper :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
ok :: true:mark:false:0':nil:ok → true:mark:false:0':nil:ok
top :: true:mark:false:0':nil:ok → top
hole_true:mark:false:0':nil:ok1_0 :: true:mark:false:0':nil:ok
hole_top2_0 :: top
gen_true:mark:false:0':nil:ok3_0 :: Nat → true:mark:false:0':nil:ok

Generator Equations:
gen_true:mark:false:0':nil:ok3_0(0) ⇔ true
gen_true:mark:false:0':nil:ok3_0(+(x, 1)) ⇔ mark(gen_true:mark:false:0':nil:ok3_0(x))

No more defined symbols left to analyse.