Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:12:57 2012

Optimize a model with 108 rows, 271 columns and 271 nonzeros
Model has 214 quadratic constraints
Presolve removed 0 rows and 3 columns
Presolve time: 1.25s
Presolved: 108 rows, 268 columns, 268 nonzeros
Variable types: 214 continuous, 54 integer (53 binary)

Root relaxation: objective 0.000000e+00, 28 iterations, 0.00 seconds

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

H    0     0                      50.0000000          -     -      -    1s
     0     0    0.00000    0   47   50.00000    0.00000   100%     -    1s
     0     0    0.39412    0   51   50.00000    0.39412  99.2%     -    1s
     0     2    0.46250    0   51   50.00000    0.46250  99.1%     -    1s
H   42    42                      28.0000000    2.32656  91.7%  24.7    1s
*   63    43              13      22.0000000    2.35098  89.3%  27.3    1s
*  121    65              13      20.0000000    3.38333  83.1%  28.6    1s

Explored 2842 nodes (57359 simplex iterations) in 3.33 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%