Gurobi 5.0.1 (linux64) logging started Mon Feb  4 19:07:31 2013

Optimize a model with 70375 rows, 5625 columns and 213750 nonzeros
Presolve removed 6877 rows and 2872 columns
Presolve time: 0.56s
Presolved: 63498 rows, 2753 columns, 193085 nonzeros
Variable types: 36 continuous, 2717 integer (2717 binary)
Found heuristic solution: objective 114310.00000

Root relaxation: objective 8.385478e+04, 20796 iterations, 2.27 seconds

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

     0     0 83854.7778    0   18 114310.000 83854.7778  26.6%     -    3s
H    0     0                    83892.000000 83854.7778  0.04%     -    3s
H    0     0                    83874.000000 83854.7778  0.02%     -    3s
H    0     0                    83872.000000 83854.7778  0.02%     -    3s
     0     0 83855.0556    0   19 83872.0000 83855.0556  0.02%     -    3s
     0     0 83855.0556    0   20 83872.0000 83855.0556  0.02%     -    4s
H    0     0                    83867.000000 83855.0556  0.01%     -    4s
     0     0 83855.0556    0   15 83867.0000 83855.0556  0.01%     -    4s
H    0     0                    83866.000000 83855.0556  0.01%     -    4s
     0     2 83855.0556    0   15 83866.0000 83855.0556  0.01%     -    4s
    11     9 83855.0556    0   25 83866.0000 83855.0556  0.01%   3.9    5s
H   12     9                    83863.000000 83855.0556  0.01%   3.6    5s

Cutting planes:
  MIR: 8
  Zero half: 1

Explored 12 nodes (31820 simplex iterations) in 5.07 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.386300000000e+04, best bound 8.385600000000e+04, gap 0.0083%