Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:44:14 2012

Optimize a model with 163 rows, 500 columns and 500 nonzeros
Model has 324 quadratic constraints
Presolve removed 0 rows and 20 columns
Presolve time: 1.89s
Presolved: 163 rows, 480 columns, 480 nonzeros
Variable types: 324 continuous, 156 integer (155 binary)

Root relaxation: objective 0.000000e+00, 59 iterations, 0.00 seconds

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

H    0     0                      76.0000000          -     -      -    1s
     0     0    0.00000    0    2   76.00000    0.00000   100%     -    1s
     0     0    0.00000    0    2   76.00000    0.00000   100%     -    1s
     0     0    0.00000    0    9   76.00000    0.00000   100%     -    1s
     0     2    0.00000    0   68   76.00000    0.00000   100%     -    1s
*   14    14              11       7.0000000    0.00000   100%  82.8    1s
H  135    67                       6.0000000    1.00000  83.3%  19.7    2s
*  137    53              47       5.0000000    1.00000  80.0%  19.5    2s
H  152    56                       5.0000000    1.00000  80.0%  20.6    2s
*  193    15              12       4.0000000    1.15385  71.2%  21.3    2s

Cutting planes:

Explored 253 nodes (5667 simplex iterations) in 2.11 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%