Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:52:47 2012

Optimize a model with 179 rows, 539 columns and 539 nonzeros
Model has 356 quadratic constraints
Presolve removed 0 rows and 17 columns
Presolve time: 2.08s
Presolved: 179 rows, 522 columns, 522 nonzeros
Variable types: 356 continuous, 166 integer (165 binary)

Root relaxation: objective 0.000000e+00, 63 iterations, 0.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

H    0     0                      89.0000000          -     -      -    2s
     0     0    0.00000    0   16   89.00000    0.00000   100%     -    2s
     0     0    0.00000    0   19   89.00000    0.00000   100%     -    2s
     0     0    0.00000    0   18   89.00000    0.00000   100%     -    2s
     0     2    0.00000    0   17   89.00000    0.00000   100%     -    2s
H   24    24                      20.0000000    1.40129  93.0%  53.7    2s
*   31    29              23       9.0000000    1.40129  84.4%  43.6    2s
*   51    15              19       6.0000000    1.47266  75.5%  31.5    2s

Cutting planes:

Explored 209 nodes (6100 simplex iterations) in 2.31 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%