Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:01:12 2013

Optimize a model with 47971 rows, 4356 columns and 145926 nonzeros
Presolve removed 3243 rows and 2194 columns
Presolve time: 0.35s
Presolved: 44728 rows, 2162 columns, 136324 nonzeros
Variable types: 34 continuous, 2128 integer (2128 binary)
Found heuristic solution: objective 100757.00000

Root relaxation: objective 6.924043e+04, 13853 iterations, 1.09 seconds

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

     0     0 69240.4286    0   13 100757.000 69240.4286  31.3%     -    1s
H    0     0                    69259.000000 69240.4286  0.03%     -    1s
H    0     0                    69257.000000 69240.4286  0.02%     -    1s
     0     0 69240.8571    0   23 69257.0000 69240.8571  0.02%     -    2s
     0     0 69240.8571    0   23 69257.0000 69240.8571  0.02%     -    2s
     0     0 69240.8571    0   26 69257.0000 69240.8571  0.02%     -    2s
H    0     0                    69256.000000 69240.8571  0.02%     -    2s
H    0     0                    69251.000000 69240.8571  0.01%     -    2s
     0     2 69240.8571    0   17 69251.0000 69240.8571  0.01%     -    2s
H   69    44                    69250.000000 69241.0000  0.01%   184    4s
H   88    54                    69249.000000 69241.0000  0.01%   154    4s
H   96    59                    69248.000000 69241.0000  0.01%   144    4s
H  138    70                    69247.000000 69241.0000  0.01%   106    4s

Cutting planes:
  Gomory: 6
  Cover: 1
  Implied bound: 1
  MIR: 21
  Zero half: 5

Explored 138 nodes (33696 simplex iterations) in 4.61 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.924700000000e+04, best bound 6.924100000000e+04, gap 0.0087%