Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:00:56 2013

Optimize a model with 45825 rows, 4225 columns and 139425 nonzeros
Presolve removed 4718 rows and 2161 columns
Presolve time: 0.37s
Presolved: 41107 rows, 2064 columns, 124988 nonzeros
Variable types: 27 continuous, 2037 integer (2037 binary)
Found heuristic solution: objective 75222.000000

Root relaxation: objective 5.416386e+04, 7607 iterations, 0.61 seconds

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

     0     0 54163.8561    0   11 75222.0000 54163.8561  28.0%     -    1s
H    0     0                    54174.000000 54163.8561  0.02%     -    1s
H    0     0                    54171.000000 54163.8561  0.01%     -    1s
     0     0 54164.1421    0   33 54171.0000 54164.1421  0.01%     -    1s
     0     0 54164.1421    0   11 54171.0000 54164.1421  0.01%     -    1s
     0     0 54164.1698    0   37 54171.0000 54164.1698  0.01%     -    1s
     0     2 54164.5066    0   37 54171.0000 54164.5066  0.01%     -    1s
H    1     2                    54170.000000 54164.5066  0.01%   2.0    1s

Cutting planes:
  Gomory: 12
  MIR: 20
  Zero half: 14

Explored 7 nodes (9320 simplex iterations) in 1.82 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.417000000000e+04, best bound 5.416500000000e+04, gap 0.0092%