Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:37:43 2012

Optimize a model with 285 rows, 798 columns and 798 nonzeros
Model has 568 quadratic constraints
Presolve removed 0 rows and 11 columns
Presolve time: 3.32s
Presolved: 285 rows, 787 columns, 787 nonzeros
Variable types: 568 continuous, 219 integer (218 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                     129.0000000          -     -      -    3s
     0     0    0.00000    0    4  129.00000    0.00000   100%     -    3s
     0     0    0.00000    0    3  129.00000    0.00000   100%     -    3s
     0     0    0.00000    0    3  129.00000    0.00000   100%     -    3s
     0     2    0.00000    0  146  129.00000    0.00000   100%     -    3s
H   54    54                      35.0000000    2.57576  92.6%  46.5    3s
H   81    75                      32.0000000    2.57576  92.0%  37.8    3s
H  135    82                      30.0000000    2.87097  90.4%  31.7    3s
*  136    61              26      24.0000000    2.87097  88.0%  31.5    3s
H  321   193                      23.0000000    4.19355  81.8%  24.7    3s
*  321   164              33      22.0000000    4.19355  80.9%  24.7    3s
*  669   308              47      21.0000000    8.20293  60.9%  33.6    4s
   725   305   18.36655   26  573   21.00000    8.20293  60.9%  34.3    5s
H 2501   158                      20.0000000   16.00000  20.0%  34.4    9s
  2583   139     cutoff   33        20.00000   16.21053  18.9%  34.0   10s

Explored 2943 nodes (98983 simplex iterations) in 12.98 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%