Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:53:11 2013

Optimize a model with 13287 rows, 1849 columns and 40678 nonzeros
Presolve removed 1995 rows and 957 columns
Presolve time: 0.08s
Presolved: 11292 rows, 892 columns, 34516 nonzeros
Variable types: 16 continuous, 876 integer (876 binary)
Found heuristic solution: objective 39921.000000

Root relaxation: objective 3.247175e+04, 2929 iterations, 0.12 seconds

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

     0     0 32471.7500    0   12 39921.0000 32471.7500  18.7%     -    0s
H    0     0                    32497.000000 32471.7500  0.08%     -    0s
H    0     0                    32485.000000 32471.7500  0.04%     -    0s
     0     0 32472.3842    0   17 32485.0000 32472.3842  0.04%     -    0s
     0     0 32472.3842    0   10 32485.0000 32472.3842  0.04%     -    0s
H    0     0                    32483.000000 32472.3842  0.03%     -    0s
     0     0 32472.6305    0   18 32483.0000 32472.6305  0.03%     -    0s
H    0     0                    32481.000000 32472.6305  0.03%     -    0s
     0     2 32472.7474    0   18 32481.0000 32472.7474  0.03%     -    0s
H    4     3                    32480.000000 32472.7804  0.02%   0.2    0s
H    4     3                    32477.000000 32472.7804  0.01%   0.2    0s

Cutting planes:
  Gomory: 5
  Cover: 1
  MIR: 15
  Zero half: 12

Explored 7 nodes (4101 simplex iterations) in 0.44 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.247700000000e+04, best bound 3.247500000000e+04, gap 0.0062%