Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:33:47 2012

Optimize a model with 287 rows, 814 columns and 814 nonzeros
Model has 572 quadratic constraints
Presolve removed 0 rows and 19 columns
Presolve time: 3.34s
Presolved: 287 rows, 795 columns, 795 nonzeros
Variable types: 572 continuous, 223 integer (222 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                     153.0000000          -     -      -    3s
     0     0    0.00000    0  156  153.00000    0.00000   100%     -    3s
     0     0    0.00000    0  138  153.00000    0.00000   100%     -    3s
     0     0    0.00000    0  136  153.00000    0.00000   100%     -    3s
     0     2    0.00000    0  129  153.00000    0.00000   100%     -    3s
H   41    41                      25.0000000    3.61504  85.5%  34.5    3s
*   70    51              40      24.0000000    3.61504  84.9%  36.4    3s
*  177   100              23      22.0000000    6.52778  70.3%  30.8    3s
H  355   135                      21.0000000    8.75443  58.3%  29.3    3s
   601   193   19.08788   15  136   21.00000   10.61509  49.5%  26.9    6s
  1522   312     cutoff   28        21.00000   13.33333  36.5%  35.1   10s
  4080   520     cutoff   34        21.00000   17.01441  19.0%  29.7   15s
* 4813   220              42      20.0000000   17.82277  10.9%  28.7   16s

Explored 5056 nodes (144927 simplex iterations) in 16.57 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%