Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:07:43 2012

Optimize a model with 6223 rows, 2450 columns and 20923 nonzeros
Presolve removed 932 rows and 49 columns
Presolve time: 0.14s
Presolved: 5291 rows, 2401 columns, 18669 nonzeros
Variable types: 0 continuous, 2401 integer (2401 binary)
Found heuristic solution: objective 34.0000000

Root relaxation: objective 4.000000e+00, 5108 iterations, 0.43 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 (5775 simplex iterations) in 0.62 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%