Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:02:43 2013

Optimize a model with 52462 rows, 4624 columns and 159528 nonzeros
Presolve removed 4055 rows and 2342 columns
Presolve time: 0.42s
Presolved: 48407 rows, 2282 columns, 147231 nonzeros
Variable types: 31 continuous, 2251 integer (2251 binary)
Found heuristic solution: objective 84654.000000

Root relaxation: objective 5.994418e+04, 16739 iterations, 1.54 seconds

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

     0     0 59944.1818    0    9 84654.0000 59944.1818  29.2%     -    2s
H    0     0                    59954.000000 59944.1818  0.02%     -    2s
H    0     0                    59951.000000 59944.1818  0.01%     -    2s
     0     0 59945.0912    0   37 59951.0000 59945.0912  0.01%     -    2s

Cutting planes:
  Gomory: 6
  MIR: 8

Explored 0 nodes (16850 simplex iterations) in 2.36 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.995100000000e+04, best bound 5.994600000000e+04, gap 0.0083%