No. of nodes

Before optimization

After optimization

GSTP

SecuTPGF

GSTP

SecuTPGF

100

17

0

12

0

200

18

23

13

18

300

17

24

14

17

400

14

22

12

17

500

14

20

12

16

600

14

19

12

16

700

16

18

12

16

800

17

18

11

16

900

21

20

10

15

1000

21

19

11

15