Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:37:42 2012

Optimize a model with 1 rows, 18 columns and 18 nonzeros
Model has 24 quadratic objective terms
Presolve time: 0.00s
Presolved: 25 rows, 42 columns, 90 nonzeros
Variable types: 0 continuous, 42 integer (42 binary)
Found heuristic solution: objective 12.0000000
Found heuristic solution: objective 7.0000000

Root relaxation: objective 0.000000e+00, 27 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   11    7.00000    0.00000   100%     -    0s
H    0     0                       6.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   14    6.00000    0.00000   100%     -    0s
     0     0    0.00000    0    6    6.00000    0.00000   100%     -    0s
H    0     0                       5.0000000    0.00000   100%     -    0s
     0     2    0.00000    0    6    5.00000    0.00000   100%     -    0s
*   68    12               5       4.0000000    1.00000  75.0%   3.9    0s

Cutting planes:
  Cover: 44

Explored 84 nodes (452 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%