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 [B6 (ENTRY)]
   Succs (1): B5

 [B1]
   1: fib
   2: [B1.1] (ImplicitCastExpr, LValueToRValue, int)
   3: return [B1.2];
   Preds (1): B2
   Succs (1): B0

 [B2]
   1: i
   2: [B2.1] (ImplicitCastExpr, LValueToRValue, int)
   3: 20
   4: [B2.2] < [B2.3]
   T: while [B2.4]
   Preds (2): B3 B5
   Succs (2): B4 B1

 [B3]
   Preds (1): B4
   Succs (1): B2

 [B4]
   1: fib
   2: [B4.1] (ImplicitCastExpr, LValueToRValue, int)
   3: int temp_fib = fib;
   4: fib
   5: [B4.4] (ImplicitCastExpr, LValueToRValue, int)
   6: fib_last
   7: [B4.6] (ImplicitCastExpr, LValueToRValue, int)
   8: [B4.5] + [B4.7]
   9: fib
  10: [B4.9] = [B4.8]
  11: temp_fib
  12: [B4.11] (ImplicitCastExpr, LValueToRValue, int)
  13: fib_last
  14: [B4.13] = [B4.12]
  15: i
  16: [B4.15] (ImplicitCastExpr, LValueToRValue, int)
  17: 1
  18: [B4.16] + [B4.17]
  19: i
  20: [B4.19] = [B4.18]
   Preds (1): B2
   Succs (1): B3

 [B5]
   1: 0
   2: int fib_last = 0;
   3: 1
   4: int fib = 1;
   5: 0
   6: int i = 0;
   Preds (1): B6
   Succs (1): B2

 [B0 (EXIT)]
   Preds (1): B1

0-6-pre = max(-inf, inf)
1-6-pre = max(-inf, inf)
2-6-pre = max(-inf, inf)
3-6-pre = max(-inf, inf)
4-6-pre = max(-inf, inf)
5-6-pre = max(-inf, inf)
0-5-pre = max(-inf, 0-6-pre)
1-5-pre = max(-inf, 1-6-pre)
2-5-pre = max(-inf, 2-6-pre)
3-5-pre = max(-inf, 3-6-pre)
4-5-pre = max(-inf, 4-6-pre)
5-5-pre = max(-inf, 5-6-pre)
0-5-0 = max(-inf, add(1, MCF<[0,0,0,0],[2:1,1:2,3:1,1:3,4:1,1:4]>(0-5-pre, 1-5-pre, 2-5-pre, 3-5-pre, 4-5-pre, 5-5-pre)))
1-5-0 = max(-inf, add(-1, MCF<[0,0,0,0],[2:1,1:2,3:1,1:3,4:1,1:4]>(0-5-pre, 1-5-pre, 2-5-pre, 3-5-pre, 4-5-pre, 5-5-pre)))
2-5-0 = max(-inf, MCF<[0,0,0,0],[2:1,1:2,3:1,1:3,4:1,1:4]>(0-5-pre, 1-5-pre, 2-5-pre, 3-5-pre, 4-5-pre, 5-5-pre))
3-5-0 = max(-inf, MCF<[0,0,0,0],[2:1,1:2,3:1,1:3,4:1,1:4]>(0-5-pre, 1-5-pre, 2-5-pre, 3-5-pre, 4-5-pre, 5-5-pre))
4-5-0 = max(-inf, MCF<[0,0,0,0],[2:1,1:2,3:1,1:3,4:1,1:4]>(0-5-pre, 1-5-pre, 2-5-pre, 3-5-pre, 4-5-pre, 5-5-pre))
5-5-0 = max(-inf, MCF<[0,0,0,0],[2:1,1:2,3:1,1:3,4:1,1:4]>(0-5-pre, 1-5-pre, 2-5-pre, 3-5-pre, 4-5-pre, 5-5-pre))
0-2-pre = max(-inf, 0-5-0, 0-3-pre)
1-2-pre = max(-inf, 1-5-0, 1-3-pre)
2-2-pre = max(-inf, 2-5-0, 2-3-pre)
3-2-pre = max(-inf, 3-5-0, 3-3-pre)
4-2-pre = max(-inf, 4-5-0, 4-3-pre)
5-2-pre = max(-inf, 5-5-0, 5-3-pre)
0-4-pre = max(-inf, 0-2-pre)
1-4-pre = max(-inf, 1-2-pre)
2-4-pre = max(-inf, 2-2-pre)
3-4-pre = max(-inf, 3-2-pre)
4-4-pre = max(-inf, min(19, 4-2-pre))
5-4-pre = max(-inf, 5-2-pre)
0-1-pre = max(-inf, 0-2-pre)
1-1-pre = max(-inf, 1-2-pre)
2-1-pre = max(-inf, 2-2-pre)
3-1-pre = max(-inf, 3-2-pre)
4-1-pre = max(-inf, 4-2-pre)
5-1-pre = max(-inf, min(-20, 5-2-pre))
0-4-0 = max(-inf, MCF<[-2,1,1,0],[2:1,1:2,3:1,1:3,4:1,1:4]>(0-4-pre, 1-4-pre, 2-4-pre, 3-4-pre, 4-4-pre, 5-4-pre))
1-4-0 = max(-inf, MCF<[2,-1,-1,0],[2:1,1:2,3:1,1:3,4:1,1:4]>(0-4-pre, 1-4-pre, 2-4-pre, 3-4-pre, 4-4-pre, 5-4-pre))
2-4-0 = max(-inf, MCF<[-1,0,1,0],[2:1,1:2,3:1,1:3,4:1,1:4]>(0-4-pre, 1-4-pre, 2-4-pre, 3-4-pre, 4-4-pre, 5-4-pre))
3-4-0 = max(-inf, MCF<[1,0,-1,0],[2:1,1:2,3:1,1:3,4:1,1:4]>(0-4-pre, 1-4-pre, 2-4-pre, 3-4-pre, 4-4-pre, 5-4-pre))
4-4-0 = max(-inf, MCF<[-1,0,0,1],[2:1,1:2,3:1,1:3,4:1,1:4]>(0-4-pre, 1-4-pre, 2-4-pre, 3-4-pre, 4-4-pre, 5-4-pre))
5-4-0 = max(-inf, MCF<[1,0,0,-1],[2:1,1:2,3:1,1:3,4:1,1:4]>(0-4-pre, 1-4-pre, 2-4-pre, 3-4-pre, 4-4-pre, 5-4-pre))
0-4-1 = max(-inf, MCF<[-1,1,0,0],[2:1,1:2,3:1,1:3,4:1,1:4]>(0-4-0, 1-4-0, 2-4-0, 3-4-0, 4-4-0, 5-4-0))
1-4-1 = max(-inf, MCF<[1,-1,0,0],[2:1,1:2,3:1,1:3,4:1,1:4]>(0-4-0, 1-4-0, 2-4-0, 3-4-0, 4-4-0, 5-4-0))
2-4-1 = max(-inf, MCF<[-1,0,0,0],[2:1,1:2,3:1,1:3,4:1,1:4]>(0-4-0, 1-4-0, 2-4-0, 3-4-0, 4-4-0, 5-4-0))
3-4-1 = max(-inf, MCF<[1,0,0,0],[2:1,1:2,3:1,1:3,4:1,1:4]>(0-4-0, 1-4-0, 2-4-0, 3-4-0, 4-4-0, 5-4-0))
4-4-1 = max(-inf, add(1, MCF<[-1,0,0,1],[2:1,1:2,3:1,1:3,4:1,1:4]>(0-4-0, 1-4-0, 2-4-0, 3-4-0, 4-4-0, 5-4-0)))
5-4-1 = max(-inf, add(-1, MCF<[1,0,0,-1],[2:1,1:2,3:1,1:3,4:1,1:4]>(0-4-0, 1-4-0, 2-4-0, 3-4-0, 4-4-0, 5-4-0)))
0-3-pre = max(-inf, 0-4-1)
1-3-pre = max(-inf, 1-4-1)
2-3-pre = max(-inf, 2-4-1)
3-3-pre = max(-inf, 3-4-1)
4-3-pre = max(-inf, 4-4-1)
5-3-pre = max(-inf, 5-4-1)
0-0-pre = max(-inf, 0-1-pre)
1-0-pre = max(-inf, 1-1-pre)
2-0-pre = max(-inf, 2-1-pre)
3-0-pre = max(-inf, 3-1-pre)
4-0-pre = max(-inf, 4-1-pre)
5-0-pre = max(-inf, 5-1-pre)

Block 0: 
	fib <= 1
	-fib <= -1
	fib_last <= inf
	-fib_last <= inf
	i <= 20
	-i <= -20
Block 1: 
	fib <= 1
	-fib <= -1
	fib_last <= inf
	-fib_last <= inf
	i <= 20
	-i <= -20
Block 2: 
	fib <= inf
	-fib <= inf
	fib_last <= inf
	-fib_last <= inf
	i <= 20
	-i <= 0
Block 3: 
	fib <= inf
	-fib <= inf
	fib_last <= inf
	-fib_last <= inf
	i <= 20
	-i <= -1
Block 4: 
	fib <= inf
	-fib <= inf
	fib_last <= inf
	-fib_last <= inf
	i <= 19
	-i <= 0
Block 5: 
	fib <= inf
	-fib <= inf
	fib_last <= inf
	-fib_last <= inf
	i <= inf
	-i <= inf
Block 6: 
	fib <= inf
	-fib <= inf
	fib_last <= inf
	-fib_last <= inf
	i <= inf
	-i <= inf