Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:56:03 2013

Optimize a model with 26289 rows, 2916 columns and 80190 nonzeros
Presolve removed 1662 rows and 1458 columns
Presolve time: 0.12s
Presolved: 24627 rows, 1458 columns, 75462 nonzeros
Variable types: 31 continuous, 1427 integer (1427 binary)
Found heuristic solution: objective 65412.000000

Root relaxation: objective 4.684033e+04, 13182 iterations, 0.81 seconds

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

     0     0 46840.3333    0   19 65412.0000 46840.3333  28.4%     -    1s
H    0     0                    46884.000000 46840.3333  0.09%     -    1s
H    0     0                    46870.000000 46840.3333  0.06%     -    1s
H    0     0                    46854.000000 46840.3333  0.03%     -    1s
     0     0 46840.3333    0   19 46854.0000 46840.3333  0.03%     -    1s
     0     0 46840.3333    0   10 46854.0000 46840.3333  0.03%     -    1s
H    0     0                    46852.000000 46840.3333  0.02%     -    1s
     0     0 46840.3333    0   16 46852.0000 46840.3333  0.02%     -    1s
     0     2 46840.3333    0   10 46852.0000 46840.3333  0.02%     -    1s
H    1     2                    46847.000000 46840.3333  0.01%   6.0    1s
H  121    59                    46846.000000 46841.0000  0.01%  37.5    1s

Cutting planes:
  Gomory: 12
  Cover: 6
  Implied bound: 3
  MIR: 88
  Zero half: 23

Explored 1807 nodes (66458 simplex iterations) in 4.41 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.684600000000e+04, best bound 4.684200000000e+04, gap 0.0085%