Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:53:49 2013

Optimize a model with 16261 rows, 2116 columns and 49726 nonzeros
Presolve removed 2723 rows and 1105 columns
Presolve time: 0.11s
Presolved: 13538 rows, 1011 columns, 41302 nonzeros
Variable types: 16 continuous, 995 integer (995 binary)
Found heuristic solution: objective 49037.000000

Root relaxation: objective 3.785856e+04, 4262 iterations, 0.17 seconds

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

     0     0 37858.5625    0    8 49037.0000 37858.5625  22.8%     -    0s
H    0     0                    37867.000000 37858.5625  0.02%     -    0s
     0     0 37860.9145    0   24 37867.0000 37860.9145  0.02%     -    0s
     0     0 37860.9145    0   10 37867.0000 37860.9145  0.02%     -    0s
     0     0 37861.6272    0   27 37867.0000 37861.6272  0.01%     -    0s
     0     0 37862.9618    0   28 37867.0000 37862.9618  0.01%     -    0s
     0     1 37863.0317    0   27 37867.0000 37863.0317  0.01%     -    0s

Cutting planes:
  Gomory: 5
  Cover: 3
  Implied bound: 3
  MIR: 10
  GUB cover: 2
  Zero half: 2

Explored 4 nodes (4581 simplex iterations) in 0.47 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.786700000000e+04, best bound 3.786400000000e+04, gap 0.0079%