Gurobi 5.0.1 (linux64) logging started Fri Nov 16 03:16:21 2012

Optimize a model with 3519 rows, 1640 columns and 11998 nonzeros
Presolve removed 1003 rows and 42 columns
Presolve time: 0.11s
Presolved: 2516 rows, 1598 columns, 9432 nonzeros
Variable types: 0 continuous, 1598 integer (1598 binary)
Found heuristic solution: objective 40.0000000

Root relaxation: objective 4.000000e+00, 1811 iterations, 0.09 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 (5425 simplex iterations) in 0.39 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%