Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:18:46 2013

Optimize a model with 1146 rows, 19612 columns and 1080289 nonzeros
Presolve removed 11 rows and 11 columns
Presolve time: 2.89s
Presolved: 1135 rows, 19601 columns, 1079519 nonzeros
Variable types: 0 continuous, 19601 integer (19601 binary)
Found heuristic solution: objective 10824.000000

Root relaxation: objective 8.486429e+03, 6124 iterations, 3.18 seconds

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

     0     0 8486.42857    0   64 10824.0000 8486.42857  21.6%     -    6s
H    0     0                    9315.0000000 8486.42857  8.90%     -    6s
H    0     0                    9203.0000000 8486.42857  7.79%     -    6s
*    0     0               0    8490.0000000 8490.00000   0.0%     -   11s

Cutting planes:
  Zero half: 1

Explored 0 nodes (7425 simplex iterations) in 11.78 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.490000000000e+03, best bound 8.490000000000e+03, gap 0.0%