MAYBE

Initial complexity problem:
1:	T:
		(?, 1)    eval(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)    eval(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ]
		(1, 1)    start(a, b) -> eval(a, b)
	start location:	start
	leaf cost:	0

By chaining the transition start(a, b) -> eval(a, b) with all transitions in problem 1, the following new transitions are obtained:
	start(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ]
	start(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
We thus obtain the following problem:
2:	T:
		(1, 2)    start(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ]
		(1, 2)    start(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)    eval(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)    eval(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ]
	start location:	start
	leaf cost:	0

By chaining the transition start(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ] with all transitions in problem 2, the following new transitions are obtained:
	start(a, b) -> eval(a - 1, b - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 ]
	start(a, b) -> eval(b - 3, b - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 ]
We thus obtain the following problem:
3:	T:
		(1, 3)    start(a, b) -> eval(a - 1, b - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 ]
		(1, 3)    start(a, b) -> eval(b - 3, b - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 ]
		(1, 2)    start(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)    eval(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)    eval(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ]
	start location:	start
	leaf cost:	0

By chaining the transition start(a, b) -> eval(a - 1, b - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 ] with all transitions in problem 3, the following new transitions are obtained:
	start(a, b) -> eval(b - 3, a) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 ]
	start(a, b) -> eval(a - 2, a - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 ]
We thus obtain the following problem:
4:	T:
		(1, 4)    start(a, b) -> eval(b - 3, a) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 ]
		(1, 4)    start(a, b) -> eval(a - 2, a - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 ]
		(1, 3)    start(a, b) -> eval(b - 3, b - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 ]
		(1, 2)    start(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)    eval(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)    eval(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ]
	start location:	start
	leaf cost:	0

By chaining the transition start(a, b) -> eval(b - 3, a) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 ] with all transitions in problem 4, the following new transitions are obtained:
	start(a, b) -> eval(a - 2, b - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 ]
	start(a, b) -> eval(b - 4, b - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 ]
We thus obtain the following problem:
5:	T:
		(1, 5)    start(a, b) -> eval(a - 2, b - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 ]
		(1, 5)    start(a, b) -> eval(b - 4, b - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 ]
		(1, 4)    start(a, b) -> eval(a - 2, a - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 ]
		(1, 3)    start(a, b) -> eval(b - 3, b - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 ]
		(1, 2)    start(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)    eval(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)    eval(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ]
	start location:	start
	leaf cost:	0

By chaining the transition start(a, b) -> eval(a - 2, b - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 ] with all transitions in problem 5, the following new transitions are obtained:
	start(a, b) -> eval(b - 4, a - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 ]
	start(a, b) -> eval(a - 3, a - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 ]
We thus obtain the following problem:
6:	T:
		(1, 6)    start(a, b) -> eval(b - 4, a - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 ]
		(1, 6)    start(a, b) -> eval(a - 3, a - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 ]
		(1, 5)    start(a, b) -> eval(b - 4, b - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 ]
		(1, 4)    start(a, b) -> eval(a - 2, a - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 ]
		(1, 3)    start(a, b) -> eval(b - 3, b - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 ]
		(1, 2)    start(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)    eval(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)    eval(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ]
	start location:	start
	leaf cost:	0

By chaining the transition start(a, b) -> eval(b - 4, a - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 ] with all transitions in problem 6, the following new transitions are obtained:
	start(a, b) -> eval(a - 3, b - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 ]
	start(a, b) -> eval(b - 5, b - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 ]
We thus obtain the following problem:
7:	T:
		(1, 7)    start(a, b) -> eval(a - 3, b - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 ]
		(1, 7)    start(a, b) -> eval(b - 5, b - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 ]
		(1, 6)    start(a, b) -> eval(a - 3, a - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 ]
		(1, 5)    start(a, b) -> eval(b - 4, b - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 ]
		(1, 4)    start(a, b) -> eval(a - 2, a - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 ]
		(1, 3)    start(a, b) -> eval(b - 3, b - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 ]
		(1, 2)    start(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)    eval(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)    eval(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ]
	start location:	start
	leaf cost:	0

By chaining the transition start(a, b) -> eval(a - 3, b - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 ] with all transitions in problem 7, the following new transitions are obtained:
	start(a, b) -> eval(b - 5, a - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 ]
	start(a, b) -> eval(a - 4, a - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 ]
We thus obtain the following problem:
8:	T:
		(1, 8)    start(a, b) -> eval(b - 5, a - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 ]
		(1, 8)    start(a, b) -> eval(a - 4, a - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 ]
		(1, 7)    start(a, b) -> eval(b - 5, b - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 ]
		(1, 6)    start(a, b) -> eval(a - 3, a - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 ]
		(1, 5)    start(a, b) -> eval(b - 4, b - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 ]
		(1, 4)    start(a, b) -> eval(a - 2, a - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 ]
		(1, 3)    start(a, b) -> eval(b - 3, b - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 ]
		(1, 2)    start(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)    eval(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)    eval(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ]
	start location:	start
	leaf cost:	0

By chaining the transition start(a, b) -> eval(b - 5, a - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 ] with all transitions in problem 8, the following new transitions are obtained:
	start(a, b) -> eval(a - 4, b - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 ]
	start(a, b) -> eval(b - 6, b - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 ]
We thus obtain the following problem:
9:	T:
		(1, 9)    start(a, b) -> eval(a - 4, b - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 ]
		(1, 9)    start(a, b) -> eval(b - 6, b - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 ]
		(1, 8)    start(a, b) -> eval(a - 4, a - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 ]
		(1, 7)    start(a, b) -> eval(b - 5, b - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 ]
		(1, 6)    start(a, b) -> eval(a - 3, a - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 ]
		(1, 5)    start(a, b) -> eval(b - 4, b - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 ]
		(1, 4)    start(a, b) -> eval(a - 2, a - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 ]
		(1, 3)    start(a, b) -> eval(b - 3, b - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 ]
		(1, 2)    start(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)    eval(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)    eval(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ]
	start location:	start
	leaf cost:	0

By chaining the transition start(a, b) -> eval(a - 4, b - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 ] with all transitions in problem 9, the following new transitions are obtained:
	start(a, b) -> eval(b - 6, a - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 ]
	start(a, b) -> eval(a - 5, a - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 ]
We thus obtain the following problem:
10:	T:
		(1, 10)    start(a, b) -> eval(b - 6, a - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 ]
		(1, 10)    start(a, b) -> eval(a - 5, a - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 ]
		(1, 9)     start(a, b) -> eval(b - 6, b - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 ]
		(1, 8)     start(a, b) -> eval(a - 4, a - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 ]
		(1, 7)     start(a, b) -> eval(b - 5, b - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 ]
		(1, 6)     start(a, b) -> eval(a - 3, a - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 ]
		(1, 5)     start(a, b) -> eval(b - 4, b - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 ]
		(1, 4)     start(a, b) -> eval(a - 2, a - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 ]
		(1, 3)     start(a, b) -> eval(b - 3, b - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 ]
		(1, 2)     start(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)     eval(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)     eval(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ]
	start location:	start
	leaf cost:	0

By chaining the transition start(a, b) -> eval(b - 6, a - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 ] with all transitions in problem 10, the following new transitions are obtained:
	start(a, b) -> eval(a - 5, b - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 ]
	start(a, b) -> eval(b - 7, b - 6) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 ]
We thus obtain the following problem:
11:	T:
		(1, 11)    start(a, b) -> eval(a - 5, b - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 ]
		(1, 11)    start(a, b) -> eval(b - 7, b - 6) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 ]
		(1, 10)    start(a, b) -> eval(a - 5, a - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 ]
		(1, 9)     start(a, b) -> eval(b - 6, b - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 ]
		(1, 8)     start(a, b) -> eval(a - 4, a - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 ]
		(1, 7)     start(a, b) -> eval(b - 5, b - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 ]
		(1, 6)     start(a, b) -> eval(a - 3, a - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 ]
		(1, 5)     start(a, b) -> eval(b - 4, b - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 ]
		(1, 4)     start(a, b) -> eval(a - 2, a - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 ]
		(1, 3)     start(a, b) -> eval(b - 3, b - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 ]
		(1, 2)     start(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)     eval(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)     eval(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ]
	start location:	start
	leaf cost:	0

By chaining the transition start(a, b) -> eval(a - 5, b - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 ] with all transitions in problem 11, the following new transitions are obtained:
	start(a, b) -> eval(b - 7, a - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 ]
	start(a, b) -> eval(a - 6, a - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 ]
We thus obtain the following problem:
12:	T:
		(1, 12)    start(a, b) -> eval(b - 7, a - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 ]
		(1, 12)    start(a, b) -> eval(a - 6, a - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 ]
		(1, 11)    start(a, b) -> eval(b - 7, b - 6) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 ]
		(1, 10)    start(a, b) -> eval(a - 5, a - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 ]
		(1, 9)     start(a, b) -> eval(b - 6, b - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 ]
		(1, 8)     start(a, b) -> eval(a - 4, a - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 ]
		(1, 7)     start(a, b) -> eval(b - 5, b - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 ]
		(1, 6)     start(a, b) -> eval(a - 3, a - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 ]
		(1, 5)     start(a, b) -> eval(b - 4, b - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 ]
		(1, 4)     start(a, b) -> eval(a - 2, a - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 ]
		(1, 3)     start(a, b) -> eval(b - 3, b - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 ]
		(1, 2)     start(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)     eval(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)     eval(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ]
	start location:	start
	leaf cost:	0

By chaining the transition start(a, b) -> eval(b - 7, a - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 ] with all transitions in problem 12, the following new transitions are obtained:
	start(a, b) -> eval(a - 6, b - 6) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 ]
	start(a, b) -> eval(b - 8, b - 7) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 ]
We thus obtain the following problem:
13:	T:
		(1, 13)    start(a, b) -> eval(a - 6, b - 6) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 ]
		(1, 13)    start(a, b) -> eval(b - 8, b - 7) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 ]
		(1, 12)    start(a, b) -> eval(a - 6, a - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 ]
		(1, 11)    start(a, b) -> eval(b - 7, b - 6) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 ]
		(1, 10)    start(a, b) -> eval(a - 5, a - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 ]
		(1, 9)     start(a, b) -> eval(b - 6, b - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 ]
		(1, 8)     start(a, b) -> eval(a - 4, a - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 ]
		(1, 7)     start(a, b) -> eval(b - 5, b - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 ]
		(1, 6)     start(a, b) -> eval(a - 3, a - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 ]
		(1, 5)     start(a, b) -> eval(b - 4, b - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 ]
		(1, 4)     start(a, b) -> eval(a - 2, a - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 ]
		(1, 3)     start(a, b) -> eval(b - 3, b - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 ]
		(1, 2)     start(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)     eval(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)     eval(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ]
	start location:	start
	leaf cost:	0

By chaining the transition start(a, b) -> eval(a - 6, b - 6) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 ] with all transitions in problem 13, the following new transitions are obtained:
	start(a, b) -> eval(b - 8, a - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 /\ a - 6 >= 1 ]
	start(a, b) -> eval(a - 7, a - 6) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 /\ a - 6 >= 1 ]
We thus obtain the following problem:
14:	T:
		(1, 14)    start(a, b) -> eval(b - 8, a - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 /\ a - 6 >= 1 ]
		(1, 14)    start(a, b) -> eval(a - 7, a - 6) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 /\ a - 6 >= 1 ]
		(1, 13)    start(a, b) -> eval(b - 8, b - 7) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 ]
		(1, 12)    start(a, b) -> eval(a - 6, a - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 ]
		(1, 11)    start(a, b) -> eval(b - 7, b - 6) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 ]
		(1, 10)    start(a, b) -> eval(a - 5, a - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 ]
		(1, 9)     start(a, b) -> eval(b - 6, b - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 ]
		(1, 8)     start(a, b) -> eval(a - 4, a - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 ]
		(1, 7)     start(a, b) -> eval(b - 5, b - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 ]
		(1, 6)     start(a, b) -> eval(a - 3, a - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 ]
		(1, 5)     start(a, b) -> eval(b - 4, b - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 ]
		(1, 4)     start(a, b) -> eval(a - 2, a - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 ]
		(1, 3)     start(a, b) -> eval(b - 3, b - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 ]
		(1, 2)     start(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)     eval(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)     eval(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ]
	start location:	start
	leaf cost:	0

By chaining the transition start(a, b) -> eval(b - 8, a - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 /\ a - 6 >= 1 ] with all transitions in problem 14, the following new transitions are obtained:
	start(a, b) -> eval(a - 7, b - 7) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 /\ a - 6 >= 1 /\ b - 8 >= 1 ]
	start(a, b) -> eval(b - 9, b - 8) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 /\ a - 6 >= 1 /\ b - 8 >= 1 ]
We thus obtain the following problem:
15:	T:
		(1, 15)    start(a, b) -> eval(a - 7, b - 7) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 /\ a - 6 >= 1 /\ b - 8 >= 1 ]
		(1, 15)    start(a, b) -> eval(b - 9, b - 8) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 /\ a - 6 >= 1 /\ b - 8 >= 1 ]
		(1, 14)    start(a, b) -> eval(a - 7, a - 6) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 /\ a - 6 >= 1 ]
		(1, 13)    start(a, b) -> eval(b - 8, b - 7) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 ]
		(1, 12)    start(a, b) -> eval(a - 6, a - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 ]
		(1, 11)    start(a, b) -> eval(b - 7, b - 6) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 ]
		(1, 10)    start(a, b) -> eval(a - 5, a - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 ]
		(1, 9)     start(a, b) -> eval(b - 6, b - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 ]
		(1, 8)     start(a, b) -> eval(a - 4, a - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 ]
		(1, 7)     start(a, b) -> eval(b - 5, b - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 ]
		(1, 6)     start(a, b) -> eval(a - 3, a - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 ]
		(1, 5)     start(a, b) -> eval(b - 4, b - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 ]
		(1, 4)     start(a, b) -> eval(a - 2, a - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 ]
		(1, 3)     start(a, b) -> eval(b - 3, b - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 ]
		(1, 2)     start(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)     eval(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)     eval(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ]
	start location:	start
	leaf cost:	0

By chaining the transition start(a, b) -> eval(a - 7, b - 7) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 /\ a - 6 >= 1 /\ b - 8 >= 1 ] with all transitions in problem 15, the following new transitions are obtained:
	start(a, b) -> eval(b - 9, a - 6) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 /\ a - 6 >= 1 /\ b - 8 >= 1 /\ a - 7 >= 1 ]
	start(a, b) -> eval(a - 8, a - 7) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 /\ a - 6 >= 1 /\ b - 8 >= 1 /\ a - 7 >= 1 ]
We thus obtain the following problem:
16:	T:
		(1, 16)    start(a, b) -> eval(b - 9, a - 6) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 /\ a - 6 >= 1 /\ b - 8 >= 1 /\ a - 7 >= 1 ]
		(1, 16)    start(a, b) -> eval(a - 8, a - 7) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 /\ a - 6 >= 1 /\ b - 8 >= 1 /\ a - 7 >= 1 ]
		(1, 15)    start(a, b) -> eval(b - 9, b - 8) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 /\ a - 6 >= 1 /\ b - 8 >= 1 ]
		(1, 14)    start(a, b) -> eval(a - 7, a - 6) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 /\ a - 6 >= 1 ]
		(1, 13)    start(a, b) -> eval(b - 8, b - 7) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 /\ b - 7 >= 1 ]
		(1, 12)    start(a, b) -> eval(a - 6, a - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 /\ a - 5 >= 1 ]
		(1, 11)    start(a, b) -> eval(b - 7, b - 6) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 /\ b - 6 >= 1 ]
		(1, 10)    start(a, b) -> eval(a - 5, a - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 /\ a - 4 >= 1 ]
		(1, 9)     start(a, b) -> eval(b - 6, b - 5) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 /\ b - 5 >= 1 ]
		(1, 8)     start(a, b) -> eval(a - 4, a - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 /\ a - 3 >= 1 ]
		(1, 7)     start(a, b) -> eval(b - 5, b - 4) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 /\ b - 4 >= 1 ]
		(1, 6)     start(a, b) -> eval(a - 3, a - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 /\ a - 2 >= 1 ]
		(1, 5)     start(a, b) -> eval(b - 4, b - 3) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 /\ b - 3 >= 1 ]
		(1, 4)     start(a, b) -> eval(a - 2, a - 1) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 /\ a - 1 >= 1 /\ b - 1 >= 1 ]
		(1, 3)     start(a, b) -> eval(b - 3, b - 2) [ a >= 1 /\ b >= 1 /\ b - 2 >= 1 /\ a + 1 >= 1 ]
		(1, 2)     start(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)     eval(a, b) -> eval(a - 1, a) [ a >= 1 /\ b >= 1 ]
		(?, 1)     eval(a, b) -> eval(b - 2, a + 1) [ a >= 1 /\ b >= 1 ]
	start location:	start
	leaf cost:	0

Complexity upper bound ?

Time: 3.502 sec (SMT: 3.305 sec)