Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:22:39 2012

Optimize a model with 6222 rows, 2652 columns and 21114 nonzeros
Presolve removed 1020 rows and 0 columns
Presolve time: 0.13s
Presolved: 5202 rows, 2652 columns, 18717 nonzeros
Variable types: 0 continuous, 2652 integer (2652 binary)
Found heuristic solution: objective 30.0000000

Root relaxation: objective 4.000000e+00, 5623 iterations, 0.57 seconds

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

*    0     0               0       4.0000000    4.00000   0.0%     -    0s

Explored 0 nodes (6312 simplex iterations) in 0.77 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%