Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:02:15 2013

Optimize a model with 52462 rows, 4624 columns and 159528 nonzeros
Presolve removed 6475 rows and 2391 columns
Presolve time: 0.37s
Presolved: 45987 rows, 2233 columns, 139326 nonzeros
Variable types: 21 continuous, 2212 integer (2212 binary)
Found heuristic solution: objective 109423.00000

Root relaxation: objective 9.028899e+04, 8485 iterations, 0.67 seconds

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

     0     0 90288.9928    0   10 109423.000 90288.9928  17.5%     -    1s
H    0     0                    90301.000000 90288.9928  0.01%     -    1s
     0     0 90290.0216    0   19 90301.0000 90290.0216  0.01%     -    1s
     0     0 90290.0216    0   11 90301.0000 90290.0216  0.01%     -    1s
     0     0 90290.0216    0   21 90301.0000 90290.0216  0.01%     -    2s
     0     2 90290.6364    0   21 90301.0000 90290.6364  0.01%     -    2s
H  176    59                    90296.000000 90291.0003  0.01%  16.1    2s

Cutting planes:
  Gomory: 4
  MIR: 12
  Zero half: 5

Explored 176 nodes (13490 simplex iterations) in 2.38 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 9.029600000000e+04, best bound 9.029100028523e+04, gap 0.0055%