Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:55:52 2013

Optimize a model with 4089 rows, 841 columns and 12615 nonzeros
Presolve removed 923 rows and 443 columns
Presolve time: 0.03s
Presolved: 3166 rows, 398 columns, 9834 nonzeros
Variable types: 13 continuous, 385 integer (385 binary)
Found heuristic solution: objective 16349.000000

Root relaxation: objective 1.293086e+04, 2116 iterations, 0.05 seconds

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

     0     0 12930.8636    0    9 16349.0000 12930.8636  20.9%     -    0s
H    0     0                    12949.000000 12930.8636  0.14%     -    0s
H    0     0                    12948.000000 12930.8636  0.13%     -    0s
H    0     0                    12938.000000 12930.8636  0.06%     -    0s
     0     0 12930.8636    0   16 12938.0000 12930.8636  0.06%     -    0s
     0     0 12930.8636    0   12 12938.0000 12930.8636  0.06%     -    0s
     0     0 12930.8636    0   13 12938.0000 12930.8636  0.06%     -    0s
     0     0 12931.1987    0   21 12938.0000 12931.1987  0.05%     -    0s
     0     0 12931.2721    0   21 12938.0000 12931.2721  0.05%     -    0s
     0     0 12931.4167    0   25 12938.0000 12931.4167  0.05%     -    0s
     0     0 12931.5089    0   28 12938.0000 12931.5089  0.05%     -    0s
     0     0 12931.5089    0   27 12938.0000 12931.5089  0.05%     -    0s
H    0     0                    12937.000000 12931.5089  0.04%     -    0s
     0     2 12931.5489    0   27 12937.0000 12931.5489  0.04%     -    0s

Cutting planes:
  Gomory: 5
  Cover: 9
  Implied bound: 10
  MIR: 31
  Zero half: 5

Explored 441 nodes (5639 simplex iterations) in 0.22 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.293700000000e+04, best bound 1.293600000000e+04, gap 0.0077%