Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:58:33 2012

Optimize a model with 139 rows, 300 columns and 300 nonzeros
Model has 276 quadratic constraints
Presolve time: 1.60s
Presolved: 139 rows, 300 columns, 300 nonzeros
Variable types: 276 continuous, 24 integer (24 binary)

Root relaxation: objective 0.000000e+00, 12 iterations, 0.00 seconds

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

H    0     0                      70.0000000          -     -      -    1s
     0     0    0.00000    0   22   70.00000    0.00000   100%     -    1s
     0     0    0.50000    0   24   70.00000    0.50000  99.3%     -    1s
     0     0    0.50000    0   24   70.00000    0.50000  99.3%     -    1s
     0     2    0.50000    0   24   70.00000    0.50000  99.3%     -    1s
*   40    40              21      65.0000000    6.17692  90.5%  31.4    1s
H   72    59                      62.0000000    6.20000  90.0%  32.6    1s
*   75    57              19      60.0000000    6.20000  89.7%  31.5    1s
*  145   104              16      59.0000000    8.93333  84.9%  34.2    1s
*  147   102              17      58.0000000    8.93333  84.6%  33.8    1s
*  229   156              17      57.0000000   12.57368  77.9%  35.6    1s
  2656   703   49.05882   41  179   57.00000   35.00000  38.6%  26.2    5s
* 3884   832              37      55.0000000   39.71429  27.8%  23.2    5s

Explored 7223 nodes (143160 simplex iterations) in 8.81 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.500000000000e+01, best bound 5.500000000000e+01, gap 0.0%