Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:41:43 2012

Optimize a model with 310 rows, 856 columns and 856 nonzeros
Model has 618 quadratic constraints
Presolve removed 0 rows and 16 columns
Presolve time: 3.65s
Presolved: 310 rows, 840 columns, 840 nonzeros
Variable types: 618 continuous, 222 integer (221 binary)

Root relaxation: objective 0.000000e+00, 83 iterations, 0.00 seconds

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

H    0     0                     153.0000000          -     -      -    3s
     0     0    0.00000    0    3  153.00000    0.00000   100%     -    3s
     0     0    0.00000    0  160  153.00000    0.00000   100%     -    3s
     0     0    0.00000    0  132  153.00000    0.00000   100%     -    3s
     0     2    0.00000    0  131  153.00000    0.00000   100%     -    3s
*   31    31              21      25.0000000    3.45833  86.2%  57.3    4s
   605   297   20.91838   11  524   25.00000    9.61268  61.5%  27.4    5s
  2183   445   19.38342   33  493   25.00000   18.00000  28.0%  36.3   10s
  4483   513     cutoff   37        25.00000   21.02379  15.9%  31.0   15s
* 6624     3              47      24.0000000   24.00000   0.0%  28.6   19s

Explored 6625 nodes (191885 simplex iterations) in 19.21 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.400000000000e+01, best bound 2.400000000000e+01, gap 0.0%