Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:40:10 2012

Optimize a model with 170 rows, 509 columns and 509 nonzeros
Model has 338 quadratic constraints
Presolve removed 0 rows and 26 columns
Presolve time: 1.97s
Presolved: 170 rows, 483 columns, 483 nonzeros
Variable types: 338 continuous, 145 integer (144 binary)

Root relaxation: objective 0.000000e+00, 61 iterations, 0.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

H    0     0                      77.0000000          -     -      -    1s
     0     0    0.00000    0    4   77.00000    0.00000   100%     -    1s
     0     0    0.00000    0   63   77.00000    0.00000   100%     -    1s
     0     0    0.00000    0    2   77.00000    0.00000   100%     -    1s
     0     2    0.00000    0   91   77.00000    0.00000   100%     -    2s
*   45    45              28      13.0000000    1.61194  87.6%  26.1    2s
H   85    45                      12.0000000    2.20879  81.6%  19.0    2s
H  135    76                      11.0000000    2.25000  79.5%  16.0    2s
*  150    66              47      10.0000000    2.25000  77.5%  15.4    2s
*  185    55              27       9.0000000    2.27731  74.7%  15.0    2s
*  490    74              18       8.0000000    5.65169  29.4%  16.1    2s
H  503    70                       8.0000000    5.81250  27.3%  16.3    2s
*  503    25               6       7.0000000    5.81250  17.0%  16.3    2s

Cutting planes:

Explored 541 nodes (9542 simplex iterations) in 2.33 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%