Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:54:36 2013

Optimize a model with 19649 rows, 2401 columns and 60025 nonzeros
Presolve removed 2846 rows and 1241 columns
Presolve time: 0.16s
Presolved: 16803 rows, 1160 columns, 51371 nonzeros
Variable types: 21 continuous, 1139 integer (1139 binary)
Found heuristic solution: objective 45178.000000

Root relaxation: objective 3.288498e+04, 5163 iterations, 0.23 seconds

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

     0     0 32884.9830    0    9 45178.0000 32884.9830  27.2%     -    0s
H    0     0                    32898.000000 32884.9830  0.04%     -    0s
H    0     0                    32897.000000 32884.9830  0.04%     -    0s
H    0     0                    32890.000000 32884.9830  0.02%     -    0s
     0     0 32887.8170    0   19 32890.0000 32887.8170  0.01%     -    0s

Cutting planes:
  Gomory: 6
  MIR: 6
  Zero half: 1

Explored 0 nodes (5201 simplex iterations) in 0.50 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.289000000000e+04, best bound 3.288800000000e+04, gap 0.0061%