Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:58:51 2013

Optimize a model with 37881 rows, 3721 columns and 115351 nonzeros
Presolve removed 3615 rows and 1895 columns
Presolve time: 0.27s
Presolved: 34266 rows, 1826 columns, 104361 nonzeros
Variable types: 27 continuous, 1799 integer (1799 binary)
Found heuristic solution: objective 76886.000000

Root relaxation: objective 5.756605e+04, 8405 iterations, 0.50 seconds

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

     0     0 57566.0476    0    9 76886.0000 57566.0476  25.1%     -    0s
H    0     0                    57573.000000 57566.0476  0.01%     -    0s
H    0     0                    57572.000000 57566.0476  0.01%     -    0s
     0     0 57566.5714    0   21 57572.0000 57566.5714  0.01%     -    1s

Cutting planes:
  Gomory: 6
  Implied bound: 1
  MIR: 9
  Zero half: 1

Explored 0 nodes (8520 simplex iterations) in 1.08 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.757200000000e+04, best bound 5.756700000000e+04, gap 0.0087%