Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:01:57 2013

Optimize a model with 527 rows, 4342 columns and 192057 nonzeros
Presolve removed 36 rows and 97 columns
Presolve time: 3.30s
Presolved: 491 rows, 4245 columns, 187961 nonzeros
Variable types: 0 continuous, 4245 integer (4245 binary)
Found heuristic solution: objective 3179.0000000
Found heuristic solution: objective 2820.0000000

Root relaxation: objective 1.864667e+03, 702 iterations, 0.07 seconds

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

     0     0 1864.66667    0   36 2820.00000 1864.66667  33.9%     -    3s
H    0     0                    2261.0000000 1864.66667  17.5%     -    3s
*    0     0               0    1867.0000000 1867.00000   0.0%     -    3s

Cutting planes:
  Gomory: 3
  Clique: 7
  Zero half: 19

Explored 0 nodes (788 simplex iterations) in 3.73 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.867000000000e+03, best bound 1.867000000000e+03, gap 0.0%