Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:01:04 2013

Optimize a model with 47971 rows, 4356 columns and 145926 nonzeros
Presolve removed 8875 rows and 2305 columns
Presolve time: 0.37s
Presolved: 39096 rows, 2051 columns, 118548 nonzeros
Variable types: 20 continuous, 2031 integer (2031 binary)
Found heuristic solution: objective 106072.00000

Root relaxation: objective 8.504421e+04, 10220 iterations, 0.79 seconds

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

     0     0 85044.2105    0   11 106072.000 85044.2105  19.8%     -    1s
H    0     0                    85074.000000 85044.2105  0.04%     -    1s
H    0     0                    85067.000000 85044.2105  0.03%     -    1s
H    0     0                    85055.000000 85044.2105  0.01%     -    1s
     0     0 85045.0000    0   22 85055.0000 85045.0000  0.01%     -    1s
     0     0 85045.0000    0   15 85055.0000 85045.0000  0.01%     -    1s
     0     0 85045.0000    0   15 85055.0000 85045.0000  0.01%     -    1s
H    0     0                    85052.000000 85045.0000  0.01%     -    1s

Cutting planes:
  Gomory: 1
  Implied bound: 1
  MIR: 9

Explored 0 nodes (11815 simplex iterations) in 1.91 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.505200000000e+04, best bound 8.504500000000e+04, gap 0.0082%