Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:01:40 2013

Optimize a model with 553 rows, 4536 columns and 198832 nonzeros
Presolve removed 44 rows and 136 columns
Presolve time: 0.51s
Presolved: 509 rows, 4400 columns, 193626 nonzeros
Variable types: 0 continuous, 4400 integer (4400 binary)
Found heuristic solution: objective 2736.0000000
Found heuristic solution: objective 2547.0000000

Root relaxation: objective 1.795000e+03, 679 iterations, 0.06 seconds

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

*    0     0               0    1795.0000000 1795.00000   0.0%     -    0s

Explored 0 nodes (679 simplex iterations) in 0.60 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.795000000000e+03, best bound 1.795000000000e+03, gap 0.0%