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