Gurobi 5.0.1 (linux64) logging started Fri Nov 16 04:28:12 2012

Optimize a model with 6629 rows, 2652 columns and 22285 nonzeros
Presolve removed 1583 rows and 2 columns
Presolve time: 0.16s
Presolved: 5097 rows, 2650 columns, 20914 nonzeros
Variable types: 0 continuous, 2650 integer (2650 binary)
Found heuristic solution: objective 51.0000000

Root relaxation: objective 4.000000e+00, 3527 iterations, 0.31 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%     -    1s

Explored 0 nodes (15032 simplex iterations) in 1.43 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%