Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:02:22 2013

Optimize a model with 52462 rows, 4624 columns and 159528 nonzeros
Presolve removed 4786 rows and 2352 columns
Presolve time: 0.42s
Presolved: 47676 rows, 2272 columns, 145168 nonzeros
Variable types: 33 continuous, 2239 integer (2239 binary)
Found heuristic solution: objective 93022.000000

Root relaxation: objective 7.098666e+04, 14011 iterations, 1.26 seconds

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

     0     0 70986.6591    0    7 93022.0000 70986.6591  23.7%     -    1s
H    0     0                    70999.000000 70986.6591  0.02%     -    1s
H    0     0                    70994.000000 70986.6591  0.01%     -    1s
     0     0 70989.1107    0   27 70994.0000 70989.1107  0.01%     -    2s

Cutting planes:
  Gomory: 3
  MIR: 5
  Zero half: 1

Explored 0 nodes (14124 simplex iterations) in 2.09 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.099400000000e+04, best bound 7.099000000000e+04, gap 0.0056%