Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:16 2012

Optimize a model with 1 rows, 27 columns and 27 nonzeros
Model has 33 quadratic objective terms
Presolve time: 0.00s
Presolved: 34 rows, 60 columns, 126 nonzeros
Variable types: 0 continuous, 60 integer (60 binary)
Found heuristic solution: objective 11.0000000

Root relaxation: objective 0.000000e+00, 42 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    8   11.00000    0.00000   100%     -    0s
H    0     0                       8.0000000    0.00000   100%     -    0s
     0     0    0.00000    0    6    8.00000    0.00000   100%     -    0s
H    0     0                       6.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   11    6.00000    0.00000   100%     -    0s
     0     0    0.00000    0   11    6.00000    0.00000   100%     -    0s
     0     0    0.00000    0   11    6.00000    0.00000   100%     -    0s
     0     2    0.00000    0   11    6.00000    0.00000   100%     -    0s
H   54    23                       4.0000000    0.66667  83.3%   4.8    0s

Cutting planes:
  Cover: 55

Explored 88 nodes (723 simplex iterations) in 0.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%