Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:55:01 2013

Optimize a model with 22151 rows, 2601 columns and 67626 nonzeros
Presolve removed 3601 rows and 1357 columns
Presolve time: 0.16s
Presolved: 18550 rows, 1244 columns, 56561 nonzeros
Variable types: 19 continuous, 1225 integer (1225 binary)
Found heuristic solution: objective 61493.000000

Root relaxation: objective 4.808033e+04, 5783 iterations, 0.34 seconds

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

     0     0 48080.3258    0   12 61493.0000 48080.3258  21.8%     -    0s
H    0     0                    48109.000000 48080.3258  0.06%     -    0s
H    0     0                    48099.000000 48080.3258  0.04%     -    0s
H    0     0                    48093.000000 48080.3258  0.03%     -    0s
     0     0 48080.9091    0   10 48093.0000 48080.9091  0.03%     -    0s
     0     0 48080.9091    0    9 48093.0000 48080.9091  0.03%     -    0s
     0     0 48080.9091    0    7 48093.0000 48080.9091  0.03%     -    0s
H    0     0                    48088.000000 48080.9091  0.01%     -    0s
     0     2 48080.9536    0    6 48088.0000 48080.9536  0.01%     -    0s
H    5     4                    48086.000000 48082.0489  0.01%   1.6    0s

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

Explored 5 nodes (6049 simplex iterations) in 0.81 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.808600000000e+04, best bound 4.808300000000e+04, gap 0.0062%