Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:54:33 2013

Optimize a model with 19649 rows, 2401 columns and 60025 nonzeros
Presolve removed 2478 rows and 1234 columns
Presolve time: 0.14s
Presolved: 17171 rows, 1167 columns, 52386 nonzeros
Variable types: 19 continuous, 1148 integer (1148 binary)
Found heuristic solution: objective 58887.000000

Root relaxation: objective 4.684095e+04, 5517 iterations, 0.31 seconds

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

     0     0 46840.9500    0    6 58887.0000 46840.9500  20.5%     -    0s
H    0     0                    46857.000000 46840.9500  0.03%     -    0s
H    0     0                    46851.000000 46840.9500  0.02%     -    0s
     0     0 46842.3084    0   21 46851.0000 46842.3084  0.02%     -    0s
     0     0 46842.3084    0    7 46851.0000 46842.3084  0.02%     -    0s
     0     0 46842.8039    0   19 46851.0000 46842.8039  0.02%     -    0s
     0     1 46842.8366    0   19 46851.0000 46842.8366  0.02%     -    0s
H    9     7                    46848.000000 46845.9807  0.00%   0.7    0s

Cutting planes:
  Gomory: 2
  Implied bound: 1
  MIR: 7

Explored 9 nodes (5811 simplex iterations) in 0.73 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.684800000000e+04, best bound 4.684600000000e+04, gap 0.0043%