Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:54:15 2013

Optimize a model with 18472 rows, 2304 columns and 56448 nonzeros
Presolve removed 2485 rows and 1187 columns
Presolve time: 0.14s
Presolved: 15987 rows, 1117 columns, 48816 nonzeros
Variable types: 19 continuous, 1098 integer (1098 binary)
Found heuristic solution: objective 53009.000000

Root relaxation: objective 4.116155e+04, 6002 iterations, 0.32 seconds

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

     0     0 41161.5455    0   10 53009.0000 41161.5455  22.3%     -    0s
H    0     0                    41173.000000 41161.5455  0.03%     -    0s
H    0     0                    41171.000000 41161.5455  0.02%     -    0s
H    0     0                    41170.000000 41161.5455  0.02%     -    0s
     0     0 41161.5455    0   17 41170.0000 41161.5455  0.02%     -    0s
     0     0 41161.5455    0    7 41170.0000 41161.5455  0.02%     -    0s
     0     0 41161.5455    0   18 41170.0000 41161.5455  0.02%     -    0s
H    0     0                    41168.000000 41161.5455  0.02%     -    0s
     0     1 41161.5455    0   18 41168.0000 41161.5455  0.02%     -    0s
*   12     7              10    41166.000000 41163.5733  0.01%  23.8    0s

Cutting planes:
  Gomory: 9
  Implied bound: 1
  MIR: 14
  Zero half: 3

Explored 13 nodes (6558 simplex iterations) in 0.72 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.116600000000e+04, best bound 4.116400000000e+04, gap 0.0049%