Gurobi 5.0.1 (linux64) logging started Fri Nov 16 15:16:42 2012

Optimize a model with 4647 rows, 3192 columns and 16854 nonzeros
Presolve removed 450 rows and 2 columns
Presolve time: 0.10s
Presolved: 4197 rows, 3190 columns, 15584 nonzeros
Variable types: 0 continuous, 3190 integer (3190 binary)
Found heuristic solution: objective 56.0000000

Root relaxation: objective 4.000000e+00, 3267 iterations, 0.16 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 (6517 simplex iterations) in 0.51 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%