Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:55:28 2013

Optimize a model with 24857 rows, 2809 columns and 75843 nonzeros
Presolve removed 3792 rows and 1462 columns
Presolve time: 0.22s
Presolved: 21065 rows, 1347 columns, 64090 nonzeros
Variable types: 18 continuous, 1329 integer (1329 binary)
Found heuristic solution: objective 55318.000000

Root relaxation: objective 4.301053e+04, 4536 iterations, 0.27 seconds

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

     0     0 43010.5311    0    8 55318.0000 43010.5311  22.2%     -    0s
H    0     0                    43026.000000 43010.5311  0.04%     -    0s
H    0     0                    43017.000000 43010.5311  0.02%     -    0s
H    0     0                    43016.000000 43010.5311  0.01%     -    0s
     0     0 43011.0369    0   31 43016.0000 43011.0369  0.01%     -    0s
     0     0 43011.0369    0    9 43016.0000 43011.0369  0.01%     -    0s
     0     0 43011.0930    0   32 43016.0000 43011.0930  0.01%     -    0s
     0     0 43011.2026    0   26 43016.0000 43011.2026  0.01%     -    0s
     0     1 43011.2170    0   26 43016.0000 43011.2170  0.01%     -    0s

Cutting planes:
  Gomory: 8
  Cover: 2
  MIR: 18
  Zero half: 8

Explored 7 nodes (4996 simplex iterations) in 0.89 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.301600000000e+04, best bound 4.301200000000e+04, gap 0.0093%