Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:00:17 2012

Optimize a model with 275 rows, 772 columns and 772 nonzeros
Model has 548 quadratic constraints
Presolve removed 0 rows and 15 columns
Presolve time: 3.20s
Presolved: 275 rows, 757 columns, 757 nonzeros
Variable types: 548 continuous, 209 integer (208 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                     138.0000000          -     -      -    3s
     0     0    0.00000    0    4  138.00000    0.00000   100%     -    3s
     0     0    0.00000    0    5  138.00000    0.00000   100%     -    3s
     0     0    0.00000    0    4  138.00000    0.00000   100%     -    3s
     0     2    0.00000    0   13  138.00000    0.00000   100%     -    3s
*   25    25              20      25.0000000    1.07407  95.7%  64.0    3s
H  118    80                      24.0000000    4.34328  81.9%  33.9    3s
*  124    78              23      23.0000000    4.34328  81.1%  33.4    3s
*  144    73              15      22.0000000    5.85246  73.4%  31.9    3s
*  246    87              27      21.0000000    7.25714  65.4%  29.0    3s
   606   162   11.00000   14  466   21.00000   11.00000  47.6%  30.9    5s
  2428   479   17.41015   36  418   21.00000   14.34483  31.7%  37.5   10s
  5015   348   18.75573   42  338   21.00000   17.92958  14.6%  32.0   15s

Explored 6050 nodes (181858 simplex iterations) in 16.56 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%