Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:40 2012

Optimize a model with 1 rows, 31 columns and 31 nonzeros
Model has 44 quadratic objective terms
Presolve time: 0.00s
Presolved: 45 rows, 75 columns, 163 nonzeros
Variable types: 0 continuous, 75 integer (75 binary)
Found heuristic solution: objective 18.0000000

Root relaxation: objective 0.000000e+00, 60 iterations, 0.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0    0.00000    0   14   18.00000    0.00000   100%     -    0s
H    0     0                      14.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   12   14.00000    0.00000   100%     -    0s
H    0     0                      12.0000000    0.00000   100%     -    0s
H    0     0                      11.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   17   11.00000    0.00000   100%     -    0s
     0     0    0.00000    0   12   11.00000    0.00000   100%     -    0s
H    0     0                      10.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   22   10.00000    0.00000   100%     -    0s
     0     0    0.00000    0    8   10.00000    0.00000   100%     -    0s
H    0     0                       8.0000000    0.00000   100%     -    0s
H    0     0                       7.0000000    0.00000   100%     -    0s
     0     2    0.00000    0    7    7.00000    0.00000   100%     -    0s
H   99    29                       6.0000000    0.00000   100%   3.8    0s

Cutting planes:
  Cover: 81

Explored 137 nodes (1172 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%