Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:57:24 2013

Optimize a model with 32567 rows, 3364 columns and 99238 nonzeros
Presolve removed 5568 rows and 1767 columns
Presolve time: 0.23s
Presolved: 26999 rows, 1597 columns, 81928 nonzeros
Variable types: 17 continuous, 1580 integer (1580 binary)
Found heuristic solution: objective 83756.000000

Root relaxation: objective 6.610682e+04, 4980 iterations, 0.30 seconds

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

     0     0 66106.8158    0    8 83756.0000 66106.8158  21.1%     -    0s
H    0     0                    66130.000000 66106.8158  0.04%     -    0s
H    0     0                    66119.000000 66106.8158  0.02%     -    0s
H    0     0                    66117.000000 66106.8158  0.02%     -    0s
     0     0 66108.8026    0   19 66117.0000 66108.8026  0.01%     -    0s
     0     0 66108.8026    0    9 66117.0000 66108.8026  0.01%     -    0s
     0     0 66109.0763    0   23 66117.0000 66109.0763  0.01%     -    0s
     0     1 66109.2456    0   23 66117.0000 66109.2456  0.01%     -    0s

Cutting planes:
  Gomory: 6
  Implied bound: 1
  MIR: 15
  Zero half: 5

Explored 5 nodes (5215 simplex iterations) in 0.85 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.611700000000e+04, best bound 6.611200000000e+04, gap 0.0076%