Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:41 2012

Optimize a model with 1 rows, 56 columns and 56 nonzeros
Model has 81 quadratic objective terms
Presolve time: 0.00s
Presolved: 82 rows, 137 columns, 299 nonzeros
Variable types: 0 continuous, 137 integer (137 binary)
Found heuristic solution: objective 34.0000000

Root relaxation: objective 0.000000e+00, 111 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   31   34.00000    0.00000   100%     -    0s
H    0     0                      31.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   23   31.00000    0.00000   100%     -    0s
H    0     0                      22.0000000    0.00000   100%     -    0s
H    0     0                      19.0000000    0.00000   100%     -    0s
H    0     0                      18.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   35   18.00000    0.00000   100%     -    0s
     0     0    0.00000    0   19   18.00000    0.00000   100%     -    0s
H    0     0                      17.0000000    0.00000   100%     -    0s
H    0     0                      14.0000000    0.00000   100%     -    0s
     0     2    0.00000    0   17   14.00000    0.00000   100%     -    0s
H   23    23                      12.0000000    0.00000   100%   2.9    0s
H   27    27                      11.0000000    0.00000   100%   2.7    0s
H  108    62                       8.0000000    0.00000   100%   6.8    0s
*  174    60              10       7.0000000    1.00000  85.7%  11.4    0s

Cutting planes:
  Cover: 153

Explored 249 nodes (4901 simplex iterations) in 0.08 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%