Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:02:01 2013

Optimize a model with 50183 rows, 4489 columns and 152626 nonzeros
Presolve removed 6623 rows and 2323 columns
Presolve time: 0.41s
Presolved: 43560 rows, 2166 columns, 132341 nonzeros
Variable types: 26 continuous, 2140 integer (2140 binary)
Found heuristic solution: objective 86946.000000

Root relaxation: objective 6.602250e+04, 10981 iterations, 0.88 seconds

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

     0     0 66022.5000    0    8 86946.0000 66022.5000  24.1%     -    1s
H    0     0                    66044.000000 66022.5000  0.03%     -    1s
H    0     0                    66041.000000 66022.5000  0.03%     -    1s
H    0     0                    66034.000000 66022.5000  0.02%     -    1s
     0     0 66023.0000    0   15 66034.0000 66023.0000  0.02%     -    1s
     0     0 66023.0000    0    8 66034.0000 66023.0000  0.02%     -    2s
H    0     0                    66031.000000 66023.0000  0.01%     -    2s
     0     0 66023.2341    0   26 66031.0000 66023.2341  0.01%     -    2s
H    0     0                    66028.000000 66023.2341  0.01%     -    2s

Cutting planes:
  Gomory: 2
  MIR: 4
  Zero half: 1

Explored 0 nodes (13457 simplex iterations) in 2.06 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.602800000000e+04, best bound 6.602400000000e+04, gap 0.0061%