Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:08:31 2012

Optimize a model with 3105 rows, 552 columns and 9775 nonzeros
Presolve removed 1071 rows and 0 columns
Presolve time: 0.05s
Presolved: 2034 rows, 552 columns, 11813 nonzeros
Variable types: 0 continuous, 552 integer (552 binary)
Found heuristic solution: objective 20.0000000

Root relaxation: objective 6.000000e+00, 1664 iterations, 0.17 seconds

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

*    0     0               0       6.0000000    6.00000   0.0%     -    0s

Explored 0 nodes (2158 simplex iterations) in 0.27 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.000000000000e+00, best bound 6.000000000000e+00, gap 0.0%