Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:54:48 2013

Optimize a model with 20875 rows, 2500 columns and 63750 nonzeros
Presolve removed 2183 rows and 1272 columns
Presolve time: 0.15s
Presolved: 18692 rows, 1228 columns, 57156 nonzeros
Variable types: 23 continuous, 1205 integer (1205 binary)
Found heuristic solution: objective 46059.000000

Root relaxation: objective 3.275448e+04, 4991 iterations, 0.25 seconds

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

     0     0 32754.4778    0   12 46059.0000 32754.4778  28.9%     -    0s
H    0     0                    32776.000000 32754.4778  0.07%     -    0s
H    0     0                    32768.000000 32754.4778  0.04%     -    0s
H    0     0                    32765.000000 32754.4778  0.03%     -    0s
     0     0 32755.7269    0   35 32765.0000 32755.7269  0.03%     -    0s
     0     0 32755.7269    0   14 32765.0000 32755.7269  0.03%     -    0s
     0     0 32755.7269    0   32 32765.0000 32755.7269  0.03%     -    0s
     0     0 32756.0000    0   32 32765.0000 32756.0000  0.03%     -    0s
     0     0 32756.0000    0   27 32765.0000 32756.0000  0.03%     -    0s
     0     0 32756.0000    0   23 32765.0000 32756.0000  0.03%     -    0s
H    0     0                    32761.000000 32756.0000  0.02%     -    0s
     0     0 32756.0000    0   19 32761.0000 32756.0000  0.02%     -    0s
     0     2 32756.0000    0   16 32761.0000 32756.0000  0.02%     -    0s
H  821   234                    32759.000000 32756.2874  0.01%  22.1    1s

Cutting planes:
  Gomory: 6
  Cover: 5
  Implied bound: 1
  MIR: 42
  Zero half: 8

Explored 821 nodes (25477 simplex iterations) in 1.77 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.275900000000e+04, best bound 3.275700000000e+04, gap 0.0061%