Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:27 2012

Optimize a model with 1 rows, 29 columns and 29 nonzeros
Model has 40 quadratic objective terms
Presolve time: 0.00s
Presolved: 41 rows, 69 columns, 149 nonzeros
Variable types: 0 continuous, 69 integer (69 binary)
Found heuristic solution: objective 13.0000000

Root relaxation: objective 0.000000e+00, 53 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   17   13.00000    0.00000   100%     -    0s
H    0     0                       9.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   13    9.00000    0.00000   100%     -    0s
     0     0    0.00000    0   16    9.00000    0.00000   100%     -    0s
     0     0    0.00000    0   12    9.00000    0.00000   100%     -    0s
     0     0    0.00000    0    9    9.00000    0.00000   100%     -    0s
H    0     0                       8.0000000    0.00000   100%     -    0s
     0     0    0.00000    0    8    8.00000    0.00000   100%     -    0s
H    0     0                       7.0000000    0.00000   100%     -    0s
     0     0    0.00000    0   17    7.00000    0.00000   100%     -    0s
     0     0    0.00000    0   17    7.00000    0.00000   100%     -    0s
     0     2    0.00000    0   17    7.00000    0.00000   100%     -    0s
*  155    21               5       6.0000000    1.25000  79.2%   7.9    0s

Cutting planes:
  Cover: 75

Explored 177 nodes (1689 simplex iterations) in 0.03 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%