Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:58:04 2013

Optimize a model with 36050 rows, 3600 columns and 109800 nonzeros
Presolve removed 4597 rows and 1862 columns
Presolve time: 0.27s
Presolved: 31453 rows, 1738 columns, 95384 nonzeros
Variable types: 18 continuous, 1720 integer (1720 binary)
Found heuristic solution: objective 89909.000000

Root relaxation: objective 7.221208e+04, 3756 iterations, 0.29 seconds

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

     0     0 72212.0800    0    8 89909.0000 72212.0800  19.7%     -    0s
H    0     0                    72236.000000 72212.0800  0.03%     -    0s
H    0     0                    72226.000000 72212.0800  0.02%     -    0s
     0     0 72213.0000    0   14 72226.0000 72213.0000  0.02%     -    0s
     0     0 72213.0000    0    9 72226.0000 72213.0000  0.02%     -    1s
H    0     0                    72223.000000 72213.0000  0.01%     -    1s
H    0     0                    72222.000000 72213.0000  0.01%     -    1s
     0     0 72213.0000    0   13 72222.0000 72213.0000  0.01%     -    1s
     0     2 72213.0000    0   11 72222.0000 72213.0000  0.01%     -    1s

Cutting planes:
  Gomory: 3
  MIR: 15
  Zero half: 3

Explored 15 nodes (5615 simplex iterations) in 1.30 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.222200000000e+04, best bound 7.221600000000e+04, gap 0.0083%