Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:55:35 2013

Optimize a model with 24857 rows, 2809 columns and 75843 nonzeros
Presolve removed 3662 rows and 1458 columns
Presolve time: 0.19s
Presolved: 21195 rows, 1351 columns, 64581 nonzeros
Variable types: 20 continuous, 1331 integer (1331 binary)
Found heuristic solution: objective 61565.000000

Root relaxation: objective 4.553767e+04, 4218 iterations, 0.27 seconds

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

     0     0 45537.6667    0   14 61565.0000 45537.6667  26.0%     -    0s
H    0     0                    45572.000000 45537.6667  0.08%     -    0s
H    0     0                    45560.000000 45537.6667  0.05%     -    0s
H    0     0                    45548.000000 45537.6667  0.02%     -    0s
     0     0 45538.1634    0   37 45548.0000 45538.1634  0.02%     -    0s
     0     0 45538.1634    0   10 45548.0000 45538.1634  0.02%     -    0s
H    0     0                    45547.000000 45538.1634  0.02%     -    0s
     0     0 45538.4602    0   38 45547.0000 45538.4602  0.02%     -    0s
     0     2 45539.0548    0   38 45547.0000 45539.0548  0.02%     -    0s
H    9     7                    45545.000000 45539.3584  0.01%   0.3    1s

Cutting planes:
  Gomory: 7
  MIR: 20
  Zero half: 4

Explored 105 nodes (9243 simplex iterations) in 1.26 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.554500000000e+04, best bound 4.554100000000e+04, gap 0.0088%