unknown

Initial ITS

Start location: [1]
Program variables: c x y
   0: [1] -> [2] : x'=nondet, T, cost: 1
   1: [2] -> [3] : y'=nondet1, T, cost: 1
   2: [3] -> [4] : c'=0, T, cost: 1
   3: [4] -> [6] : (y > 0 /\ x > 0), cost: 1
  15: [4] -> [5] : (y <= 0 \/ x <= 0), cost: 1
   4: [6] -> [7] : (x < 0 \/ x > 0), cost: 1
  13: [6] -> [14] : (x <= 0 /\ x >= 0), cost: 1
   5: [7] -> [9] : -y+x > 0, cost: 1
   8: [7] -> [11] : -y+x <= 0, cost: 1
  11: [8] -> [13] : c'=1+c, T, cost: 1
   6: [9] -> [10] : x'=y, T, cost: 1
   7: [10] -> [8] : T, cost: 1
   9: [11] -> [12] : x'=-1+x, T, cost: 1
  10: [12] -> [8] : T, cost: 1
  12: [13] -> [6] : T, cost: 1
  14: [14] -> [5] : T, cost: 1

Chained Linear Paths

Start location: [1]
Program variables: c x y
  17: [1] -> [4] : c'=0, x'=nondet, y'=nondet1, T, cost: 1
   3: [4] -> [6] : (y > 0 /\ x > 0), cost: 1
  15: [4] -> [5] : (y <= 0 \/ x <= 0), cost: 1
   4: [6] -> [7] : (x < 0 \/ x > 0), cost: 1
  18: [6] -> [5] : (x <= 0 /\ x >= 0), cost: 1
  21: [7] -> [8] : x'=y, -y+x > 0, cost: 1
  22: [7] -> [8] : x'=-1+x, -y+x <= 0, cost: 1
  23: [8] -> [6] : c'=1+c, T, cost: 1

	Eliminating location [2] by chaining:

	Applied chaining

	First rule:
	[1] -> [2] : x'=nondet, T, cost: 1
	Second rule:
	[2] -> [3] : y'=nondet1, T, cost: 1
	New rule:
	[1] -> [3] : x'=nondet, y'=nondet1, T, cost: 1
	
	Applied deletion

	Removed the following rules: 0 1
	
	Eliminating location [3] by chaining:

	Applied chaining

	First rule:
	[1] -> [3] : x'=nondet, y'=nondet1, T, cost: 1
	Second rule:
	[3] -> [4] : c'=0, T, cost: 1
	New rule:
	[1] -> [4] : c'=0, x'=nondet, y'=nondet1, T, cost: 1
	
	Applied deletion

	Removed the following rules: 2 16
	
	Eliminating location [14] by chaining:

	Applied chaining

	First rule:
	[6] -> [14] : (x <= 0 /\ x >= 0), cost: 1
	Second rule:
	[14] -> [5] : T, cost: 1
	New rule:
	[6] -> [5] : (x <= 0 /\ x >= 0), cost: 1
	
	Applied deletion

	Removed the following rules: 13 14
	
	Eliminating location [9] by chaining:

	Applied chaining

	First rule:
	[7] -> [9] : -y+x > 0, cost: 1
	Second rule:
	[9] -> [10] : x'=y, T, cost: 1
	New rule:
	[7] -> [10] : x'=y, -y+x > 0, cost: 1
	
	Applied deletion

	Removed the following rules: 5 6
	
	Eliminating location [11] by chaining:

	Applied chaining

	First rule:
	[7] -> [11] : -y+x <= 0, cost: 1
	Second rule:
	[11] -> [12] : x'=-1+x, T, cost: 1
	New rule:
	[7] -> [12] : x'=-1+x, -y+x <= 0, cost: 1
	
	Applied deletion

	Removed the following rules: 8 9
	
	Eliminating location [10] by chaining:

	Applied chaining

	First rule:
	[7] -> [10] : x'=y, -y+x > 0, cost: 1
	Second rule:
	[10] -> [8] : T, cost: 1
	New rule:
	[7] -> [8] : x'=y, -y+x > 0, cost: 1
	
	Applied deletion

	Removed the following rules: 7 19
	
	Eliminating location [12] by chaining:

	Applied chaining

	First rule:
	[7] -> [12] : x'=-1+x, -y+x <= 0, cost: 1
	Second rule:
	[12] -> [8] : T, cost: 1
	New rule:
	[7] -> [8] : x'=-1+x, -y+x <= 0, cost: 1
	
	Applied deletion

	Removed the following rules: 10 20
	
	Eliminating location [13] by chaining:

	Applied chaining

	First rule:
	[8] -> [13] : c'=1+c, T, cost: 1
	Second rule:
	[13] -> [6] : T, cost: 1
	New rule:
	[8] -> [6] : c'=1+c, T, cost: 1
	
	Applied deletion

	Removed the following rules: 11 12

Step with 17

	Trace

	17[T]
	
	Blocked

	[{}, {}]

Step with 3

	Trace

	17[T], 3[(y > 0 /\ x > 0)]
	
	Blocked

	[{}, {}, {}]

Step with 4

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)]
	
	Blocked

	[{}, {}, {18[T]}, {}]

Step with 21

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)]
	
	Blocked

	[{}, {}, {18[T]}, {}, {}]

Step with 23

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 23[T]
	
	Blocked

	[{}, {}, {18[T]}, {}, {}, {}]

Acceleration Failed

marked recursive suffix as redundant

Step with 4

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 23[T], 4[(x > 0)]
	
	Blocked

	[{}, {}, {18[T]}, {}, {}, {}, {}]

Acceleration Failed

marked recursive suffix as redundant

Step with 22

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 23[T], 4[(x > 0)], 22[(-y+x <= 0)]
	
	Blocked

	[{}, {}, {18[T]}, {}, {}, {}, {21[T]}, {}]

Accelerate

Start location: [1]
Program variables: c x y
  17: [1] -> [4] : c'=0, x'=nondet, y'=nondet1, T, cost: 1
   3: [4] -> [6] : (y > 0 /\ x > 0), cost: 1
  15: [4] -> [5] : (y <= 0 \/ x <= 0), cost: 1
   4: [6] -> [7] : (x < 0 \/ x > 0), cost: 1
  18: [6] -> [5] : (x <= 0 /\ x >= 0), cost: 1
  21: [7] -> [8] : x'=y, -y+x > 0, cost: 1
  22: [7] -> [8] : x'=-1+x, -y+x <= 0, cost: 1
  23: [8] -> [6] : c'=1+c, T, cost: 1
  24: [8] -> [8] : c'=c+n, x'=-n+x, (y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0), cost: 1

	Loop Acceleration

	Original rule:
	[8] -> [8] : c'=1+c, x'=-1+x, (-y+x <= 0 /\ x > 0), cost: 1
	New rule:
	[8] -> [8] : c'=c+n, x'=-n+x, (y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0), cost: 1

		y-x >= 0 [0]: monotonic increase yields y-x >= 0
		
		x > 0 [0]: montonic decrease yields 1-n+x > 0
		
		x > 0 [1]: eventual increase yields (1 <= 0 /\ x > 0)
		
		Replacement map: {y-x >= 0 -> y-x >= 0, x > 0 -> 1-n+x > 0}

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 24[(y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0)]
	
	Blocked

	[{}, {}, {18[T]}, {}, {}, {24[T]}]

Step with 23

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 24[(y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0)], 23[T]
	
	Blocked

	[{}, {}, {18[T]}, {}, {}, {24[T]}, {}]

Acceleration Failed

marked recursive suffix as redundant

Step with 4

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 24[(y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0)], 23[T], 4[(x > 0)]
	
	Blocked

	[{}, {}, {18[T]}, {}, {}, {24[T]}, {}, {}]

Acceleration Failed

marked recursive suffix as redundant

Step with 22

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 24[(y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0)], 23[T], 4[(x > 0)], 22[(-y+x <= 0)]
	
	Blocked

	[{}, {}, {18[T]}, {}, {}, {24[T]}, {}, {}, {}]

Covered

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 24[(y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0)], 23[T], 4[(x > 0)]
	
	Blocked

	[{}, {}, {18[T]}, {}, {}, {24[T]}, {}, {22[T]}]

Backtrack

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 24[(y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0)], 23[T]
	
	Blocked

	[{}, {}, {18[T]}, {}, {}, {24[T]}, {4[x > 0]}]

Step with 18

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 24[(y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0)], 23[T], 18[(x <= 0 /\ x >= 0)]
	
	Blocked

	[{}, {}, {18[T]}, {}, {}, {24[T]}, {4[T]}, {}]

Backtrack

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 24[(y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0)], 23[T]
	
	Blocked

	[{}, {}, {18[T]}, {}, {}, {24[T]}, {4[T], 18[T]}]

Backtrack

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 24[(y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0)]
	
	Blocked

	[{}, {}, {18[T]}, {}, {}, {23[T], 24[T]}]

Backtrack

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)]
	
	Blocked

	[{}, {}, {18[T]}, {}, {24[T]}]

Step with 23

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 23[T]
	
	Blocked

	[{}, {}, {18[T]}, {}, {24[T]}, {}]

Step with 4

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 23[T], 4[(x > 0)]
	
	Blocked

	[{}, {}, {18[T]}, {}, {24[T]}, {18[T]}, {}]

Covered

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 23[T]
	
	Blocked

	[{}, {}, {18[T]}, {}, {24[T]}, {4[x > 0], 18[T]}]

Backtrack

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)]
	
	Blocked

	[{}, {}, {18[T]}, {}, {23[T], 24[T]}]

Backtrack

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)]
	
	Blocked

	[{}, {}, {18[T]}, {21[T]}]

Step with 22

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 22[(-y+x <= 0)]
	
	Blocked

	[{}, {}, {18[T]}, {21[T]}, {}]

Step with 23

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 22[(-y+x <= 0)], 23[T]
	
	Blocked

	[{}, {}, {18[T]}, {21[T]}, {}, {}]

Accelerate

Start location: [1]
Program variables: c x y
  17: [1] -> [4] : c'=0, x'=nondet, y'=nondet1, T, cost: 1
   3: [4] -> [6] : (y > 0 /\ x > 0), cost: 1
  15: [4] -> [5] : (y <= 0 \/ x <= 0), cost: 1
   4: [6] -> [7] : (x < 0 \/ x > 0), cost: 1
  18: [6] -> [5] : (x <= 0 /\ x >= 0), cost: 1
  25: [6] -> [6] : c'=c+n2, x'=-n2+x, (y-x >= 0 /\ 1-n2+x > 0 /\ -1+n2 >= 0), cost: 1
  21: [7] -> [8] : x'=y, -y+x > 0, cost: 1
  22: [7] -> [8] : x'=-1+x, -y+x <= 0, cost: 1
  23: [8] -> [6] : c'=1+c, T, cost: 1
  24: [8] -> [8] : c'=c+n, x'=-n+x, (y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0), cost: 1

	Loop Acceleration

	Original rule:
	[6] -> [6] : c'=1+c, x'=-1+x, (-y+x <= 0 /\ x > 0), cost: 1
	New rule:
	[6] -> [6] : c'=c+n2, x'=-n2+x, (y-x >= 0 /\ 1-n2+x > 0 /\ -1+n2 >= 0), cost: 1

		y-x >= 0 [0]: monotonic increase yields y-x >= 0
		
		x > 0 [0]: montonic decrease yields 1-n2+x > 0
		
		x > 0 [1]: eventual increase yields (1 <= 0 /\ x > 0)
		
		Replacement map: {y-x >= 0 -> y-x >= 0, x > 0 -> 1-n2+x > 0}

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 25[(y-x >= 0 /\ 1-n2+x > 0 /\ -1+n2 >= 0)]
	
	Blocked

	[{}, {}, {18[T]}, {25[T]}]

Step with 18

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 25[(y-x >= 0 /\ 1-n2+x > 0 /\ -1+n2 >= 0)], 18[(x <= 0 /\ x >= 0)]
	
	Blocked

	[{}, {}, {18[T]}, {25[T]}, {}]

Backtrack

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 25[(y-x >= 0 /\ 1-n2+x > 0 /\ -1+n2 >= 0)]
	
	Blocked

	[{}, {}, {18[T]}, {18[T], 25[T]}]

Step with 4

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 25[(y-x >= 0 /\ 1-n2+x > 0 /\ -1+n2 >= 0)], 4[(x > 0)]
	
	Blocked

	[{}, {}, {18[T]}, {18[T], 25[T]}, {}]

Step with 22

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 25[(y-x >= 0 /\ 1-n2+x > 0 /\ -1+n2 >= 0)], 4[(x > 0)], 22[(-y+x <= 0)]
	
	Blocked

	[{}, {}, {18[T]}, {18[T], 25[T]}, {}, {}]

Step with 23

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 25[(y-x >= 0 /\ 1-n2+x > 0 /\ -1+n2 >= 0)], 4[(x > 0)], 22[(-y+x <= 0)], 23[T]
	
	Blocked

	[{}, {}, {18[T]}, {18[T], 25[T]}, {}, {}, {}]

Covered

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 25[(y-x >= 0 /\ 1-n2+x > 0 /\ -1+n2 >= 0)], 4[(x > 0)], 22[(-y+x <= 0)]
	
	Blocked

	[{}, {}, {18[T]}, {18[T], 25[T]}, {}, {23[T]}]

Step with 24

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 25[(y-x >= 0 /\ 1-n2+x > 0 /\ -1+n2 >= 0)], 4[(x > 0)], 22[(-y+x <= 0)], 24[(y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0)]
	
	Blocked

	[{}, {}, {18[T]}, {18[T], 25[T]}, {}, {23[T]}, {24[T]}]

Step with 23

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 25[(y-x >= 0 /\ 1-n2+x > 0 /\ -1+n2 >= 0)], 4[(x > 0)], 22[(-y+x <= 0)], 24[(y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0)], 23[T]
	
	Blocked

	[{}, {}, {18[T]}, {18[T], 25[T]}, {}, {23[T]}, {24[T]}, {}]

Covered

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 25[(y-x >= 0 /\ 1-n2+x > 0 /\ -1+n2 >= 0)], 4[(x > 0)], 22[(-y+x <= 0)], 24[(y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0)]
	
	Blocked

	[{}, {}, {18[T]}, {18[T], 25[T]}, {}, {23[T]}, {23[T], 24[T]}]

Backtrack

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 25[(y-x >= 0 /\ 1-n2+x > 0 /\ -1+n2 >= 0)], 4[(x > 0)], 22[(-y+x <= 0)]
	
	Blocked

	[{}, {}, {18[T]}, {18[T], 25[T]}, {}, {23[T], 24[T]}]

Backtrack

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 25[(y-x >= 0 /\ 1-n2+x > 0 /\ -1+n2 >= 0)], 4[(x > 0)]
	
	Blocked

	[{}, {}, {18[T]}, {18[T], 25[T]}, {22[T]}]

Backtrack

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 25[(y-x >= 0 /\ 1-n2+x > 0 /\ -1+n2 >= 0)]
	
	Blocked

	[{}, {}, {18[T]}, {4[x > 0], 18[T], 25[T]}]

Backtrack

	Trace

	17[T], 3[(y > 0 /\ x > 0)]
	
	Blocked

	[{}, {}, {18[T], 25[T]}]

Step with 4

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)]
	
	Blocked

	[{}, {}, {18[T], 25[T]}, {}]

Step with 22

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 22[(-y+x <= 0)]
	
	Blocked

	[{}, {}, {18[T], 25[T]}, {}, {}]

Step with 23

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 22[(-y+x <= 0)], 23[T]
	
	Blocked

	[{}, {}, {18[T], 25[T]}, {}, {}, {}]

Covered

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 22[(-y+x <= 0)]
	
	Blocked

	[{}, {}, {18[T], 25[T]}, {}, {23[T]}]

Step with 24

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 22[(-y+x <= 0)], 24[(y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0)]
	
	Blocked

	[{}, {}, {18[T], 25[T]}, {}, {23[T]}, {24[T]}]

Step with 23

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 22[(-y+x <= 0)], 24[(y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0)], 23[T]
	
	Blocked

	[{}, {}, {18[T], 25[T]}, {}, {23[T]}, {24[T]}, {}]

Covered

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 22[(-y+x <= 0)], 24[(y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0)]
	
	Blocked

	[{}, {}, {18[T], 25[T]}, {}, {23[T]}, {23[T], 24[T]}]

Backtrack

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 22[(-y+x <= 0)]
	
	Blocked

	[{}, {}, {18[T], 25[T]}, {}, {23[T], 24[T]}]

Backtrack

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)]
	
	Blocked

	[{}, {}, {18[T], 25[T]}, {22[T]}]

Step with 21

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)]
	
	Blocked

	[{}, {}, {18[T], 25[T]}, {22[T]}, {}]

Step with 23

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 23[T]
	
	Blocked

	[{}, {}, {18[T], 25[T]}, {22[T]}, {}, {}]

Covered

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)]
	
	Blocked

	[{}, {}, {18[T], 25[T]}, {22[T]}, {23[T]}]

Step with 24

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 24[(y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0)]
	
	Blocked

	[{}, {}, {18[T], 25[T]}, {22[T]}, {23[T]}, {24[T]}]

Step with 23

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 24[(y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0)], 23[T]
	
	Blocked

	[{}, {}, {18[T], 25[T]}, {22[T]}, {23[T]}, {24[T]}, {}]

Covered

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)], 24[(y-x >= 0 /\ -1+n >= 0 /\ 1-n+x > 0)]
	
	Blocked

	[{}, {}, {18[T], 25[T]}, {22[T]}, {23[T]}, {23[T], 24[T]}]

Backtrack

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)], 21[(-y+x > 0)]
	
	Blocked

	[{}, {}, {18[T], 25[T]}, {22[T]}, {23[T], 24[T]}]

Backtrack

	Trace

	17[T], 3[(y > 0 /\ x > 0)], 4[(x > 0)]
	
	Blocked

	[{}, {}, {18[T], 25[T]}, {21[T], 22[T]}]

Backtrack

	Trace

	17[T], 3[(y > 0 /\ x > 0)]
	
	Blocked

	[{}, {}, {4[x > 0], 18[T], 25[T]}]

Backtrack

	Trace

	17[T]
	
	Blocked

	[{}, {3[T]}]

Step with 15

	Trace

	17[T], 15[(x <= 0)]
	
	Blocked

	[{}, {3[T]}, {}]

Backtrack

	Trace

	17[T]
	
	Blocked

	[{}, {3[T], 15[x <= 0]}]

Step with 15

	Trace

	17[T], 15[(y <= 0)]
	
	Blocked

	[{}, {3[T], 15[x <= 0]}, {}]

Backtrack

	Trace

	17[T]
	
	Blocked

	[{}, {3[T], 15[(y <= 0 /\ x <= 0)]}]

Backtrack

	Trace

	Blocked

	[{17[T]}]

Accept

unknown

Build SHA: a05f16bf13df659c382799650051f91bf6828c7b