Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:55:00 2013

Optimize a model with 22151 rows, 2601 columns and 67626 nonzeros
Presolve removed 4485 rows and 1385 columns
Presolve time: 0.16s
Presolved: 17666 rows, 1216 columns, 53478 nonzeros
Variable types: 10 continuous, 1206 integer (1206 binary)
Found heuristic solution: objective 56553.000000

Root relaxation: objective 4.830493e+04, 1730 iterations, 0.11 seconds

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

     0     0 48304.9276    0   12 56553.0000 48304.9276  14.6%     -    0s
H    0     0                    48323.000000 48304.9276  0.04%     -    0s
H    0     0                    48313.000000 48304.9276  0.02%     -    0s
     0     0 48306.8236    0   20 48313.0000 48306.8236  0.01%     -    0s
     0     0 48306.8236    0    6 48313.0000 48306.8236  0.01%     -    0s
     0     0 48307.1712    0   26 48313.0000 48307.1712  0.01%     -    0s
     0     0 48307.5999    0   30 48313.0000 48307.5999  0.01%     -    0s
     0     1 48307.6147    0   30 48313.0000 48307.6147  0.01%     -    0s

Cutting planes:
  Gomory: 9
  Cover: 2
  MIR: 12
  GUB cover: 1
  Zero half: 3

Explored 5 nodes (2141 simplex iterations) in 0.53 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.831300000000e+04, best bound 4.830900000000e+04, gap 0.0083%