Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:06:17 2012

Optimize a model with 289 rows, 816 columns and 816 nonzeros
Model has 576 quadratic constraints
Presolve removed 0 rows and 18 columns
Presolve time: 3.36s
Presolved: 289 rows, 798 columns, 798 nonzeros
Variable types: 576 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                     137.0000000          -     -      -    3s
     0     0    0.00000    0  147  137.00000    0.00000   100%     -    3s
     0     0    0.06853    0  216  137.00000    0.06853   100%     -    3s
     0     2    0.07064    0  216  137.00000    0.07064   100%     -    3s
H   54    54                      24.0000000    1.90099  92.1%  28.1    3s
H   54    54                      23.0000000    1.90099  91.7%  28.1    3s
*   56    56              33      22.0000000    1.90099  91.4%  34.9    3s
*  501   237              14      20.0000000    6.53412  67.3%  33.9    4s
   649   277    8.67526   15  468   20.00000    7.10843  64.5%  42.1    5s
  2782   268     cutoff   35        20.00000   15.69355  21.5%  31.8   10s

Explored 4332 nodes (124039 simplex iterations) in 12.73 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%