Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:22:34 2013

Optimize a model with 9177 rows, 1444 columns and 28158 nonzeros
Presolve removed 1435 rows and 745 columns
Presolve time: 0.06s
Presolved: 7742 rows, 699 columns, 23821 nonzeros
Variable types: 17 continuous, 682 integer (682 binary)
Found heuristic solution: objective 31602.000000

Root relaxation: objective 2.327690e+04, 2878 iterations, 0.09 seconds

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

     0     0 23276.9045    0    8 31602.0000 23276.9045  26.3%     -    0s
H    0     0                    23289.000000 23276.9045  0.05%     -    0s
H    0     0                    23288.000000 23276.9045  0.05%     -    0s
H    0     0                    23284.000000 23276.9045  0.03%     -    0s
     0     0 23280.7707    0   17 23284.0000 23280.7707  0.01%     -    0s
     0     0 23280.7707    0    8 23284.0000 23280.7707  0.01%     -    0s
     0     0 23281.2762    0   19 23284.0000 23281.2762  0.01%     -    0s
     0     0 23281.8989    0    9 23284.0000 23281.8989  0.01%     -    0s

Cutting planes:
  Gomory: 1
  Cover: 2
  Implied bound: 29
  Clique: 1
  MIR: 9
  GUB cover: 1
  Zero half: 2

Explored 0 nodes (3043 simplex iterations) in 0.25 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.328400000000e+04, best bound 2.328200000000e+04, gap 0.0086%