Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:42:57 2012

Optimize a model with 274 rows, 766 columns and 766 nonzeros
Model has 546 quadratic constraints
Presolve removed 0 rows and 19 columns
Presolve time: 3.19s
Presolved: 274 rows, 747 columns, 747 nonzeros
Variable types: 546 continuous, 201 integer (200 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   11  137.00000    0.00000   100%     -    3s
     0     0    0.00000    0  145  137.00000    0.00000   100%     -    3s
     0     0    0.00000    0  126  137.00000    0.00000   100%     -    3s
     0     2    0.00000    0  126  137.00000    0.00000   100%     -    3s
*   40    36              27      27.0000000    3.01887  88.8%  46.7    3s
H   85    70                      26.0000000    3.60870  86.1%  32.2    3s
*   93    67              37      25.0000000    3.60870  85.6%  31.0    3s
H  286   187                      24.0000000    4.05405  83.1%  25.0    3s
*  288   167              22      23.0000000    4.05405  82.4%  25.1    3s
H  396   186                      22.0000000    6.31579  71.3%  23.8    3s
*  398   162              23      21.0000000    6.31579  69.9%  23.9    3s
   606   225    8.90000   12  454   21.00000    8.90000  57.6%  28.1    5s
* 1913   391              52      20.0000000   12.78261  36.1%  32.2    8s
  2502   408     cutoff   37        20.00000   14.21324  28.9%  31.9   10s
  4035   100   17.66387   34  450   20.00000   17.66387  11.7%  30.7   15s

Explored 4163 nodes (128143 simplex iterations) in 16.08 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%