Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:38:48 2012

Optimize a model with 54 rows, 138 columns and 138 nonzeros
Model has 106 quadratic constraints
Presolve removed 0 rows and 1 columns
Presolve time: 0.62s
Presolved: 54 rows, 137 columns, 137 nonzeros
Variable types: 106 continuous, 31 integer (30 binary)

Root relaxation: objective 0.000000e+00, 16 iterations, 0.00 seconds

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

H    0     0                      24.0000000          -     -      -    0s
     0     0    0.00000    0   12   24.00000    0.00000   100%     -    0s
     0     0    0.00000    0   12   24.00000    0.00000   100%     -    0s
     0     0    0.00000    0   28   24.00000    0.00000   100%     -    0s
H    0     0                      21.0000000    0.00000   100%     -    0s
     0     2    0.00000    0   28   21.00000    0.00000   100%     -    0s
H    8     8                      20.0000000    1.92857  90.4%  24.6    0s
*   21    21              11      11.0000000    1.92857  82.5%  23.7    0s
*   47    21               5       9.0000000    2.00000  77.8%  19.0    0s

Cutting planes:

Explored 114 nodes (2269 simplex iterations) in 0.67 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%