Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:58:00 2013

Optimize a model with 34279 rows, 3481 columns and 104430 nonzeros
Presolve removed 2534 rows and 1757 columns
Presolve time: 0.25s
Presolved: 31745 rows, 1724 columns, 96745 nonzeros
Variable types: 27 continuous, 1697 integer (1697 binary)
Found heuristic solution: objective 72284.000000

Root relaxation: objective 5.258148e+04, 11611 iterations, 0.77 seconds

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

     0     0 52581.4821    0   10 72284.0000 52581.4821  27.3%     -    1s
H    0     0                    52614.000000 52581.4821  0.06%     -    1s
H    0     0                    52598.000000 52581.4821  0.03%     -    1s
H    0     0                    52595.000000 52581.4821  0.03%     -    1s
     0     0 52581.6667    0   22 52595.0000 52581.6667  0.03%     -    1s
     0     0 52581.6667    0   14 52595.0000 52581.6667  0.03%     -    1s
H    0     0                    52592.000000 52581.6667  0.02%     -    1s
     0     0 52581.9781    0   30 52592.0000 52581.9781  0.02%     -    1s
H    0     0                    52588.000000 52581.9781  0.01%     -    1s
     0     1 52581.9963    0   30 52588.0000 52581.9963  0.01%     -    1s

Cutting planes:
  Gomory: 10
  Clique: 1
  MIR: 16
  Zero half: 2

Explored 6 nodes (16008 simplex iterations) in 1.75 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.258800000000e+04, best bound 5.258300000000e+04, gap 0.0095%