Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:01:49 2013

Optimize a model with 488 rows, 4003 columns and 156272 nonzeros
Presolve removed 62 rows and 171 columns
Presolve time: 0.41s
Presolved: 426 rows, 3832 columns, 150196 nonzeros
Variable types: 0 continuous, 3832 integer (3832 binary)
Found heuristic solution: objective 2524.0000000

Root relaxation: objective 1.720000e+03, 541 iterations, 0.04 seconds

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

*    0     0               0    1720.0000000 1720.00000   0.0%     -    0s

Explored 0 nodes (541 simplex iterations) in 0.47 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.720000000000e+03, best bound 1.720000000000e+03, gap 0.0%