graph1_3.cnf

p cnf 21 64
-6 -21 0
-5 -20 0
-4 -19 0
-12 -18 0
-11 -17 0
-10 -16 0
-9 -21 0
-8 -20 0
-7 -19 0
-3 -15 0
-2 -14 0
-1 -13 0
-3 -18 0
-2 -17 0
-1 -16 0
-3 -21 0
-2 -20 0
-1 -19 0
-18 -21 0
-17 -20 0
-16 -19 0
-15 -18 0
-14 -17 0
-13 -16 0
-12 -15 0
-11 -14 0
-10 -13 0
-9 -12 0
-8 -11 0
-7 -10 0
-6 -9 0
-5 -8 0
-4 -7 0
-3 -6 0
-2 -5 0
-1 -4 0
19 20 21 0
-19 -20 0
-19 -21 0
-20 -21 0
16 17 18 0
-16 -17 0
-16 -18 0
-17 -18 0
13 14 15 0
-13 -14 0
-13 -15 0
-14 -15 0
10 11 12 0
-10 -11 0
-10 -12 0
-11 -12 0
7 8 9 0
-7 -8 0
-7 -9 0
-8 -9 0
4 5 6 0
-4 -5 0
-4 -6 0
-5 -6 0
1 2 3 0
-1 -2 0
-1 -3 0
-2 -3 0