Gurobi 5.0.1 (linux64) logging started Mon Feb  4 17:01:12 2013

Optimize a model with 4525 rows, 900 columns and 13950 nonzeros
Presolve removed 505 rows and 451 columns
Presolve time: 0.03s
Presolved: 4020 rows, 449 columns, 12492 nonzeros
Variable types: 16 continuous, 433 integer (433 binary)
Found heuristic solution: objective 19954.000000
Found heuristic solution: objective 17404.000000

Root relaxation: objective 1.355876e+04, 2975 iterations, 0.07 seconds

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

     0     0 13558.7600    0   13 17404.0000 13558.7600  22.1%     -    0s
H    0     0                    13583.000000 13558.7600  0.18%     -    0s
H    0     0                    13581.000000 13558.7600  0.16%     -    0s
     0     0 13558.7600    0   16 13581.0000 13558.7600  0.16%     -    0s
     0     0 13558.7600    0   12 13581.0000 13558.7600  0.16%     -    0s
     0     0 13558.7600    0   16 13581.0000 13558.7600  0.16%     -    0s
H    0     0                    13574.000000 13558.7600  0.11%     -    0s
     0     2 13558.7600    0   10 13574.0000 13558.7600  0.11%     -    0s
H    1     2                    13573.000000 13558.7600  0.10%  28.0    0s
H  205    95                    13570.000000 13559.2858  0.08%  23.3    0s
H  286   118                    13569.000000 13559.6095  0.07%  22.9    0s
H  808   131                    13567.000000 13561.7052  0.04%  22.2    0s

Cutting planes:
  Gomory: 3
  MIR: 40
  Zero half: 8

Explored 1169 nodes (28684 simplex iterations) in 1.10 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.356700000000e+04, best bound 1.356600000000e+04, gap 0.0074%