Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:46:53 2012

Optimize a model with 95 rows, 234 columns and 234 nonzeros
Model has 188 quadratic constraints
Presolve time: 1.09s
Presolved: 95 rows, 234 columns, 234 nonzeros
Variable types: 188 continuous, 46 integer (46 binary)

Root relaxation: objective 0.000000e+00, 23 iterations, 0.00 seconds

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

H    0     0                      53.0000000          -     -      -    1s
     0     0    0.00000    0    2   53.00000    0.00000   100%     -    1s
     0     0    0.00000    0   40   53.00000    0.00000   100%     -    1s
     0     0    0.00000    0   36   53.00000    0.00000   100%     -    1s
     0     2    0.00000    0   36   53.00000    0.00000   100%     -    1s
*   30    30              18      25.0000000    4.62500  81.5%  27.1    1s
*   52    37              14      22.0000000    4.63158  78.9%  23.7    1s
*   84    31               9      19.0000000    6.48000  65.9%  22.5    1s
*  540     1              13      18.0000000   18.00000   0.0%  18.2    1s

Cutting planes:

Explored 541 nodes (10179 simplex iterations) in 1.32 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%