Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:19:40 2012

Optimize a model with 304 rows, 847 columns and 847 nonzeros
Model has 606 quadratic constraints
Presolve removed 0 rows and 8 columns
Presolve time: 3.54s
Presolved: 304 rows, 839 columns, 839 nonzeros
Variable types: 606 continuous, 233 integer (232 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                     145.0000000          -     -      -    3s
     0     0    0.00000    0  159  145.00000    0.00000   100%     -    3s
     0     0    0.16716    0  210  145.00000    0.16716   100%     -    3s
     0     2    0.16939    0  210  145.00000    0.16939   100%     -    3s
H   45    45                      26.0000000    2.73103  89.5%  38.4    3s
*   50    49              26      25.0000000    2.73103  89.1%  50.3    3s
H   84    74                      24.0000000    2.75676  88.5%  40.9    3s
H  194   130                      23.0000000    7.26190  68.4%  40.1    4s
H  351   164                      22.0000000    9.60354  56.3%  34.2    4s
   807   187   21.70909   13  210   22.00000   14.15789  35.6%  33.7    5s
* 2196   126              31      21.0000000   16.61677  20.9%  38.3    9s
  2231   113     cutoff   30        21.00000   16.90000  19.5%  38.1   10s

Explored 2406 nodes (94088 simplex iterations) in 10.50 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%