Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:56:14 2012

Optimize a model with 129 rows, 279 columns and 279 nonzeros
Model has 256 quadratic constraints
Presolve time: 1.49s
Presolved: 129 rows, 279 columns, 279 nonzeros
Variable types: 256 continuous, 23 integer (23 binary)

Root relaxation: objective 0.000000e+00, 11 iterations, 0.00 seconds

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

H    0     0                      72.0000000          -     -      -    1s
     0     0    0.00000    0   22   72.00000    0.00000   100%     -    1s
     0     0    0.52174    0   23   72.00000    0.52174  99.3%     -    1s
     0     2    0.54545    0   23   72.00000    0.54545  99.2%     -    1s
*   32    32              20      56.0000000    5.95882  89.4%  26.2    1s
*   61    49              18      53.0000000    6.20000  88.3%  24.8    1s
*  154   115              15      52.0000000   15.00000  71.2%  29.0    1s
H  275   136                      51.0000000   18.00000  64.7%  28.9    1s
*  566   193              14      50.0000000   29.20000  41.6%  28.6    1s

Explored 4464 nodes (95726 simplex iterations) in 4.88 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0%