Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:56:17 2012

Optimize a model with 288 rows, 806 columns and 806 nonzeros
Model has 574 quadratic constraints
Presolve removed 0 rows and 11 columns
Presolve time: 3.35s
Presolved: 288 rows, 795 columns, 795 nonzeros
Variable types: 574 continuous, 221 integer (220 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                     152.0000000          -     -      -    3s
     0     0    0.00000    0  142  152.00000    0.00000   100%     -    3s
     0     0    0.08679    0  202  152.00000    0.08679   100%     -    3s
     0     2    0.13245    0  202  152.00000    0.13245   100%     -    3s
H   44    44                      25.0000000    1.35714  94.6%  41.5    3s
*   44    44              24      24.0000000    1.35714  94.3%  41.7    3s
H  310   149                      22.0000000    5.65799  74.3%  32.9    3s
*  591   219              13      21.0000000    9.25906  55.9%  33.3    4s
   703   244   10.71355    6  498   21.00000   10.05593  52.1%  33.2    5s
  2040   429   15.86667   32  471   21.00000   13.13793  37.4%  37.5   10s
* 3626   471              46      20.0000000   15.49057  22.5%  33.5   13s
  4248   255     cutoff   36        20.00000   17.21567  13.9%  33.7   15s

Explored 4574 nodes (155210 simplex iterations) in 15.61 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%