Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:55:33 2013

Optimize a model with 24857 rows, 2809 columns and 75843 nonzeros
Presolve removed 3808 rows and 1456 columns
Presolve time: 0.17s
Presolved: 21049 rows, 1353 columns, 64393 nonzeros
Variable types: 25 continuous, 1328 integer (1328 binary)
Found heuristic solution: objective 61108.000000

Root relaxation: objective 4.494767e+04, 8937 iterations, 0.54 seconds

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

     0     0 44947.6667    0    8 61108.0000 44947.6667  26.4%     -    0s
H    0     0                    44968.000000 44947.6667  0.05%     -    0s
H    0     0                    44959.000000 44947.6667  0.03%     -    0s
H    0     0                    44956.000000 44947.6667  0.02%     -    0s
     0     0 44949.4889    0   20 44956.0000 44949.4889  0.01%     -    0s
     0     0 44949.4889    0   11 44956.0000 44949.4889  0.01%     -    0s
     0     0 44949.8829    0   21 44956.0000 44949.8829  0.01%     -    0s
     0     0 44950.7052    0   25 44956.0000 44950.7052  0.01%     -    0s
     0     1 44950.8132    0   25 44956.0000 44950.8132  0.01%     -    0s

Cutting planes:
  Gomory: 8
  Cover: 1
  MIR: 11
  Zero half: 9
  Mod-K: 1

Explored 5 nodes (9280 simplex iterations) in 1.00 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.495600000000e+04, best bound 4.495200000000e+04, gap 0.0089%