Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:27 2012

Optimize a model with 1 rows, 55 columns and 55 nonzeros
Model has 72 quadratic objective terms
Presolve removed 0 rows and 1 columns
Presolve time: 0.00s
Presolved: 73 rows, 126 columns, 270 nonzeros
Variable types: 0 continuous, 126 integer (125 binary)
Found heuristic solution: objective 26.0000000

Root relaxation: objective 0.000000e+00, 105 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   22   26.00000    0.00000   100%     -    0s
H    0     0                      20.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   22   20.00000    0.00000   100%     -    0s
H    0     0                      19.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   21   19.00000    0.00000   100%     -    0s
     0     0    0.00000    0   14   19.00000    0.00000   100%     -    0s
H    0     0                      13.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   19   13.00000    0.00000   100%     -    0s
     0     0    0.00000    0   19   13.00000    0.00000   100%     -    0s
H    0     0                      11.0000000    0.00000   100%     -    0s
     0     2    0.00000    0   19   11.00000    0.00000   100%     -    0s
H  106    57                       9.0000000    0.00000   100%   4.2    0s
*  259    71               7       8.0000000    1.00000  87.5%  10.1    0s
H  291    27                       7.0000000    4.00000  42.9%  14.8    0s

Cutting planes:
  Cover: 137

Explored 319 nodes (5396 simplex iterations) in 0.09 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%