Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:03:52 2013

Optimize a model with 57225 rows, 4900 columns and 173950 nonzeros
Presolve removed 4986 rows and 2495 columns
Presolve time: 0.43s
Presolved: 52239 rows, 2405 columns, 158591 nonzeros
Variable types: 28 continuous, 2377 integer (2377 binary)
Found heuristic solution: objective 97787.000000

Root relaxation: objective 7.387456e+04, 13567 iterations, 1.17 seconds

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

     0     0 73874.5590    0   21 97787.0000 73874.5590  24.5%     -    1s
H    0     0                    73892.000000 73874.5590  0.02%     -    1s
H    0     0                    73889.000000 73874.5590  0.02%     -    1s
     0     0 73875.1333    0   16 73889.0000 73875.1333  0.02%     -    2s
     0     0 73875.1333    0   17 73889.0000 73875.1333  0.02%     -    2s
     0     0 73875.1333    0   24 73889.0000 73875.1333  0.02%     -    2s
H    0     0                    73887.000000 73875.1333  0.02%     -    2s
     0     0 73875.1333    0   24 73887.0000 73875.1333  0.02%     -    2s
     0     2 73875.1333    0   24 73887.0000 73875.1333  0.02%     -    2s
H    7     5                    73884.000000 73875.7667  0.01%  16.4    2s
H  148    77                    73883.000000 73876.0000  0.01%  33.8    3s

Cutting planes:
  Gomory: 6
  MIR: 20
  Zero half: 6

Explored 148 nodes (21576 simplex iterations) in 3.43 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.388300000000e+04, best bound 7.387600000000e+04, gap 0.0095%