Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:34:23 2012

Optimize a model with 301 rows, 842 columns and 842 nonzeros
Model has 600 quadratic constraints
Presolve removed 0 rows and 20 columns
Presolve time: 3.50s
Presolved: 301 rows, 822 columns, 822 nonzeros
Variable types: 600 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                     168.0000000          -     -      -    3s
     0     0    0.00000    0  137  168.00000    0.00000   100%     -    3s
     0     0    0.02425    0  198  168.00000    0.02425   100%     -    3s
     0     2    0.11422    0  198  168.00000    0.11422   100%     -    3s
H   57    57                      26.0000000    1.79048  93.1%  32.1    3s
*   57    57              33      25.0000000    1.79048  92.8%  32.1    3s
   615   356    9.23267   15  487   25.00000    8.27653  66.9%  38.0    5s
*  734   389              39      24.0000000    8.27653  65.5%  45.1    5s
  2171   505     cutoff   34        24.00000   14.24528  40.6%  39.8   10s
* 2913   613              42      23.0000000   15.44544  32.8%  38.0   13s
  2949   612   18.73846   32  486   23.00000   15.53846  32.4%  37.9   15s
H 3119   569                      22.0000000   15.88889  27.8%  37.5   16s
  3602   521   20.68571   36  445   22.00000   16.92793  23.1%  37.7   20s
  4523   245     cutoff   36        22.00000   19.16327  12.9%  38.7   25s

Explored 4877 nodes (184458 simplex iterations) in 26.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%