Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:06:44 2013

Optimize a model with 67599 rows, 5476 columns and 205350 nonzeros
Presolve removed 3377 rows and 2743 columns
Presolve time: 0.51s
Presolved: 64222 rows, 2733 columns, 195577 nonzeros
Variable types: 41 continuous, 2692 integer (2692 binary)
Found heuristic solution: objective 124982.00000

Root relaxation: objective 8.591989e+04, 27534 iterations, 2.70 seconds

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

     0     0 85919.8889    0   23 124982.000 85919.8889  31.3%     -    3s
H    0     0                    85967.000000 85919.8889  0.05%     -    3s
H    0     0                    85945.000000 85919.8889  0.03%     -    3s
H    0     0                    85934.000000 85919.8889  0.02%     -    3s
     0     0 85919.8889    0   25 85934.0000 85919.8889  0.02%     -    4s
     0     0 85919.8889    0   24 85934.0000 85919.8889  0.02%     -    4s
     0     0 85919.8889    0   22 85934.0000 85919.8889  0.02%     -    4s
H    0     0                    85933.000000 85919.8889  0.02%     -    5s
H    0     0                    85931.000000 85919.8889  0.01%     -    5s
     0     2 85919.8889    0   15 85931.0000 85919.8889  0.01%     -    5s
H    7     5                    85929.000000 85919.8889  0.01%   2.7    5s
H  232   138                    85928.000000 85919.8889  0.01%   103    8s

Cutting planes:
  Gomory: 6
  Implied bound: 1
  MIR: 49
  GUB cover: 2
  Zero half: 20

Explored 232 nodes (56688 simplex iterations) in 8.47 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.592800000000e+04, best bound 8.592000000000e+04, gap 0.0093%