Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:01:18 2013

Optimize a model with 47971 rows, 4356 columns and 145926 nonzeros
Presolve removed 3867 rows and 2207 columns
Presolve time: 0.36s
Presolved: 44104 rows, 2149 columns, 134261 nonzeros
Variable types: 31 continuous, 2118 integer (2118 binary)
Found heuristic solution: objective 101733.00000

Root relaxation: objective 7.594135e+04, 10379 iterations, 0.78 seconds

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

     0     0 75941.3500    0    5 101733.000 75941.3500  25.4%     -    1s
H    0     0                    75953.000000 75941.3500  0.02%     -    1s
H    0     0                    75949.000000 75941.3500  0.01%     -    1s
     0     0 75941.3500    0   16 75949.0000 75941.3500  0.01%     -    1s
     0     0 75941.3500    0    7 75949.0000 75941.3500  0.01%     -    1s
     0     0 75941.3500    0   22 75949.0000 75941.3500  0.01%     -    1s
     0     2 75941.3500    0   15 75949.0000 75941.3500  0.01%     -    1s
H    4     4                    75948.000000 75941.3500  0.01%  10.5    2s

Cutting planes:
  Gomory: 1
  MIR: 2
  Zero half: 1
  Mod-K: 1

Explored 4 nodes (11890 simplex iterations) in 2.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.594800000000e+04, best bound 7.594200000000e+04, gap 0.0079%