c This Formular is generated by mcnf
c
c    horn? no 
c    forced? no 
c    mixed sat? no 
c    clause length = 3 
c
p cnf 20  91 
 4 -18 19 0
3 18 -5 0
-5 -8 -15 0
-20 7 -16 0
10 -13 -7 0
-12 -9 17 0
17 19 5 0
-16 9 15 0
11 -5 -14 0
18 -10 13 0
-3 11 12 0
-6 -17 -8 0
-18 14 1 0
-19 -15 10 0
12 18 -19 0
-8 4 7 0
-8 -9 4 0
7 17 -15 0
12 -7 -14 0
-10 -11 8 0
2 -15 -11 0
9 6 1 0
-11 20 -17 0
9 -15 13 0
12 -7 -17 0
-18 -2 20 0
20 12 4 0
19 11 14 0
-16 18 -4 0
-1 -17 -19 0
-13 15 10 0
-12 -14 -13 0
12 -14 -7 0
-7 16 10 0
6 10 7 0
20 14 -16 0
-19 17 11 0
-7 1 -20 0
-5 12 15 0
-4 -9 -13 0
12 -11 -7 0
-5 19 -8 0
1 16 17 0
20 -14 -15 0
13 -4 10 0
14 7 10 0
-5 9 20 0
10 1 -19 0
-16 -15 -1 0
16 3 -11 0
-15 -10 4 0
4 -15 -3 0
-10 -16 11 0
-8 12 -5 0
14 -6 12 0
1 6 11 0
-13 -5 -1 0
-7 -2 12 0
1 -20 19 0
-2 -13 -8 0
15 18 4 0
-11 14 9 0
-6 -15 -2 0
5 -12 -15 0
-6 17 5 0
-13 5 -19 0
20 -1 14 0
9 -17 15 0
-5 19 -18 0
-12 8 -10 0
-18 14 -4 0
15 -9 13 0
9 -5 -1 0
10 -19 -14 0
20 9 4 0
-9 -2 19 0
-5 13 -17 0
2 -10 -18 0
-18 3 11 0
7 -9 17 0
-15 -6 -3 0
-2 3 -13 0
12 3 -2 0
-2 -3 17 0
20 -15 -16 0
-5 -17 -19 0
-20 -18 11 0
-9 1 -5 0
-19 9 17 0
12 -2 17 0
4 -16 -5 0