Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:54:15 2012

Optimize a model with 298 rows, 833 columns and 833 nonzeros
Model has 594 quadratic constraints
Presolve removed 0 rows and 10 columns
Presolve time: 3.46s
Presolved: 298 rows, 823 columns, 823 nonzeros
Variable types: 594 continuous, 229 integer (228 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                     159.0000000          -     -      -    3s
     0     0    0.00000    0  102  159.00000    0.00000   100%     -    3s
     0     0    0.00000    0  127  159.00000    0.00000   100%     -    3s
     0     0    0.00000    0  120  159.00000    0.00000   100%     -    3s
     0     2    0.00000    0  119  159.00000    0.00000   100%     -    3s
H   44    44                      26.0000000    2.65049  89.8%  43.7    3s
*   49    43              28      22.0000000    2.65049  88.0%  48.7    3s
   650   313    9.46468   17  786   22.00000    9.46468  57.0%  37.5    5s
H  942   329                      21.0000000    9.46468  54.9%  43.4    6s
H 1523   307                      20.0000000   10.98980  45.1%  43.1    8s
  2239   344   16.13045   29  498   20.00000   12.86523  35.7%  40.5   10s
  3135   313   16.93445   33  492   20.00000   14.67442  26.6%  39.8   15s
  3752   217   17.64892   31  508   20.00000   15.75253  21.2%  40.7   20s

Explored 4351 nodes (177306 simplex iterations) in 23.58 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%