Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:00:45 2013

Optimize a model with 254 rows, 898 columns and 28423 nonzeros
Presolve removed 57 rows and 306 columns
Presolve time: 0.17s
Presolved: 197 rows, 592 columns, 23553 nonzeros
Variable types: 0 continuous, 592 integer (592 binary)
Found heuristic solution: objective 687.0000000
Found heuristic solution: objective 649.0000000

Root relaxation: objective 5.100000e+02, 37 iterations, 0.00 seconds

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

*    0     0               0     510.0000000  510.00000   0.0%     -    0s

Explored 0 nodes (37 simplex iterations) in 0.17 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.100000000000e+02, best bound 5.100000000000e+02, gap 0.0%