Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:43:39 2012

Optimize a model with 261 rows, 740 columns and 740 nonzeros
Model has 520 quadratic constraints
Presolve removed 0 rows and 23 columns
Presolve time: 3.03s
Presolved: 261 rows, 717 columns, 717 nonzeros
Variable types: 520 continuous, 197 integer (196 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                     126.0000000          -     -      -    3s
     0     0    0.00000    0    3  126.00000    0.00000   100%     -    3s
     0     0    0.00000    0  104  126.00000    0.00000   100%     -    3s
     0     0    0.00000    0   74  126.00000    0.00000   100%     -    3s
     0     2    0.00000    0   74  126.00000    0.00000   100%     -    3s
H   40    40                      29.0000000    0.95635  96.7%  35.5    3s
*   97    82              40      28.0000000    1.81446  93.5%  27.8    3s
H  146   106                      27.0000000    3.14493  88.4%  25.7    3s
H  201   129                      25.0000000    3.17730  87.3%  22.4    3s
*  315   196              44      24.0000000    4.00000  83.3%  20.5    3s
   621   355    9.28421   23  431   24.00000    7.02884  70.7%  26.3    5s
*  767   409              56      23.0000000    7.02884  69.4%  31.1    5s
H 1679   408                      20.0000000   10.85149  45.7%  33.2    7s
  2566   483   16.36095   35  419   20.00000   12.87544  35.6%  33.9   10s
  3476   485   18.03160   34  382   20.00000   14.08696  29.6%  33.4   15s
  5069   242   18.97222   40  386   20.00000   16.31857  18.4%  34.1   20s

Explored 5531 nodes (190036 simplex iterations) in 21.25 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%