Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:01:41 2013

Optimize a model with 680 rows, 5693 columns and 329723 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 4.57s
Presolved: 660 rows, 5673 columns, 328223 nonzeros
Variable types: 0 continuous, 5673 integer (5673 binary)
Found heuristic solution: objective 4605.0000000
Found heuristic solution: objective 3287.0000000

Root relaxation: objective 2.588667e+03, 1329 iterations, 0.20 seconds

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

     0     0 2588.66667    0   19 3287.00000 2588.66667  21.2%     -    4s
H    0     0                    2660.0000000 2588.66667  2.68%     -    4s
*    0     0               0    2590.0000000 2590.00000   0.0%     -    5s

Cutting planes:
  Gomory: 1
  Clique: 1
  Zero half: 15

Explored 0 nodes (1482 simplex iterations) in 5.24 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.590000000000e+03, best bound 2.590000000000e+03, gap 0.0%