Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:01:51 2013

Optimize a model with 50183 rows, 4489 columns and 152626 nonzeros
Presolve removed 4460 rows and 2287 columns
Presolve time: 0.39s
Presolved: 45723 rows, 2202 columns, 138828 nonzeros
Variable types: 26 continuous, 2176 integer (2176 binary)
Found heuristic solution: objective 96757.000000

Root relaxation: objective 7.013945e+04, 10954 iterations, 0.83 seconds

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

     0     0 70139.4522    0   13 96757.0000 70139.4522  27.5%     -    1s
H    0     0                    70153.000000 70139.4522  0.02%     -    1s
H    0     0                    70147.000000 70139.4522  0.01%     -    1s
     0     0 70139.6490    0   36 70147.0000 70139.6490  0.01%     -    1s
     0     0 70139.6490    0   10 70147.0000 70139.6490  0.01%     -    1s
     0     0 70139.6505    0   36 70147.0000 70139.6505  0.01%     -    2s
     0     2 70139.7282    0   35 70147.0000 70139.7282  0.01%     -    2s
H    8     7                    70144.000000 70139.9827  0.01%   1.2    2s

Cutting planes:
  Gomory: 6
  Cover: 1
  Implied bound: 1
  MIR: 7
  Zero half: 2

Explored 8 nodes (13370 simplex iterations) in 2.32 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.014400000000e+04, best bound 7.014000000000e+04, gap 0.0057%