NO

Initial ITS
Start location: l3
   0: l0 -> l1 : y^0'=y^post0, x^0'=x^post0, (y^0-x^0 <= 0 /\ -y^0+x^0 <= 0 /\ -y^post0+y^0 == 0 /\ x^post0-x^0 == 0), cost: 1
   1: l1 -> l0 : y^0'=y^post1, x^0'=x^post1, (x^0-x^post1 == 0 /\ y^0-y^post1 == 0), cost: 1
   2: l2 -> l0 : y^0'=y^post2, x^0'=x^post2, (x^0-x^post2 == 0 /\ y^0-y^post2 == 0), cost: 1
   3: l3 -> l2 : y^0'=y^post3, x^0'=x^post3, (y^0-y^post3 == 0 /\ -x^post3+x^0 == 0), cost: 1


Applied preprocessing
Original rule:
l0 -> l1 : y^0'=y^post0, x^0'=x^post0, (y^0-x^0 <= 0 /\ -y^0+x^0 <= 0 /\ -y^post0+y^0 == 0 /\ x^post0-x^0 == 0), cost: 1
New rule:
l0 -> l1 : y^0-x^0 == 0, cost: 1

Applied preprocessing
Original rule:
l1 -> l0 : y^0'=y^post1, x^0'=x^post1, (x^0-x^post1 == 0 /\ y^0-y^post1 == 0), cost: 1
New rule:
l1 -> l0 : TRUE, cost: 1

Applied preprocessing
Original rule:
l2 -> l0 : y^0'=y^post2, x^0'=x^post2, (x^0-x^post2 == 0 /\ y^0-y^post2 == 0), cost: 1
New rule:
l2 -> l0 : TRUE, cost: 1

Applied preprocessing
Original rule:
l3 -> l2 : y^0'=y^post3, x^0'=x^post3, (y^0-y^post3 == 0 /\ -x^post3+x^0 == 0), cost: 1
New rule:
l3 -> l2 : TRUE, cost: 1

Simplified rules
Start location: l3
   4: l0 -> l1 : y^0-x^0 == 0, cost: 1
   5: l1 -> l0 : TRUE, cost: 1
   6: l2 -> l0 : TRUE, cost: 1
   7: l3 -> l2 : TRUE, cost: 1


Eliminating location l2 by chaining:

Applied chaining
First rule:
l3 -> l2 : TRUE, cost: 1
Second rule:
l2 -> l0 : TRUE, cost: 1
New rule:
l3 -> l0 : TRUE, cost: 2

Applied deletion
Removed the following rules: 6 7

Eliminating location l1 by chaining:

Applied chaining
First rule:
l0 -> l1 : y^0-x^0 == 0, cost: 1
Second rule:
l1 -> l0 : TRUE, cost: 1
New rule:
l0 -> l0 : y^0-x^0 == 0, cost: 2

Applied deletion
Removed the following rules: 4 5

Eliminated locations on linear paths
Start location: l3
   9: l0 -> l0 : y^0-x^0 == 0, cost: 2
   8: l3 -> l0 : TRUE, cost: 2


Applied nonterm
Original rule:
l0 -> l0 : y^0-x^0 == 0, cost: 2
New rule:
l0 -> [4] : (y^0-x^0 >= 0 /\ -y^0+x^0 >= 0 /\ n >= 0), cost: NONTERM
Sub-proof via acceration calculus written to file:///tmp/tmpnam_NJFhEP.txt

Applied deletion
Removed the following rules: 9

Accelerated simple loops
Start location: l3
  10: l0 -> [4] : (y^0-x^0 >= 0 /\ -y^0+x^0 >= 0 /\ n >= 0), cost: NONTERM
   8: l3 -> l0 : TRUE, cost: 2


Applied chaining
First rule:
l3 -> l0 : TRUE, cost: 2
Second rule:
l0 -> [4] : (y^0-x^0 >= 0 /\ -y^0+x^0 >= 0 /\ n >= 0), cost: NONTERM
New rule:
l3 -> [4] : -y^0+x^0 == 0, cost: NONTERM

Applied deletion
Removed the following rules: 10

Chained accelerated rules with incoming rules
Start location: l3
   8: l3 -> l0 : TRUE, cost: 2
  11: l3 -> [4] : -y^0+x^0 == 0, cost: NONTERM


Removed unreachable locations and irrelevant leafs
Start location: l3
  11: l3 -> [4] : -y^0+x^0 == 0, cost: NONTERM


Computing asymptotic complexity
Proved nontermination of rule 11 via SMT.

Proved the following lower bound
Complexity:  Nonterm
Cpx degree: Nonterm

Solved cost: NONTERM
Rule cost:   NONTERM
Rule guard:  -y^0+x^0 == 0