Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:00:09 2013

Optimize a model with 43744 rows, 4096 columns and 133120 nonzeros
Presolve removed 2474 rows and 2050 columns
Presolve time: 0.19s
Presolved: 41270 rows, 2046 columns, 126067 nonzeros
Variable types: 37 continuous, 2009 integer (2009 binary)
Found heuristic solution: objective 94171.000000

Root relaxation: objective 6.487333e+04, 18519 iterations, 1.53 seconds

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

     0     0 64873.3333    0   18 94171.0000 64873.3333  31.1%     -    1s
H    0     0                    64902.000000 64873.3333  0.04%     -    1s
H    0     0                    64889.000000 64873.3333  0.02%     -    1s
H    0     0                    64886.000000 64873.3333  0.02%     -    2s
     0     0 64873.3333    0   33 64886.0000 64873.3333  0.02%     -    2s
     0     0 64873.3333    0   16 64886.0000 64873.3333  0.02%     -    2s
     0     0 64873.3333    0   32 64886.0000 64873.3333  0.02%     -    2s
H    0     0                    64881.000000 64873.3333  0.01%     -    3s
     0     2 64873.3333    0   28 64881.0000 64873.3333  0.01%     -    3s
H    4     3                    64880.000000 64873.3333  0.01%  31.5    3s

Cutting planes:
  Gomory: 16
  Cover: 2
  MIR: 19
  GUB cover: 1
  Zero half: 16

Explored 7 nodes (27227 simplex iterations) in 3.53 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.488000000000e+04, best bound 6.487400000000e+04, gap 0.0092%