Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:00:38 2013

Optimize a model with 278 rows, 732 columns and 34950 nonzeros
Presolve removed 69 rows and 93 columns
Presolve time: 0.51s
Presolved: 209 rows, 639 columns, 29505 nonzeros
Variable types: 0 continuous, 639 integer (639 binary)
Found heuristic solution: objective 530.0000000

Root relaxation: objective 5.180000e+02, 68 iterations, 0.00 seconds

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

*    0     0               0     518.0000000  518.00000   0.0%     -    0s

Explored 0 nodes (68 simplex iterations) in 0.52 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.180000000000e+02, best bound 5.180000000000e+02, gap 0.0%