Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:56:10 2013

Optimize a model with 26289 rows, 2916 columns and 80190 nonzeros
Presolve removed 2909 rows and 1486 columns
Presolve time: 0.19s
Presolved: 23380 rows, 1430 columns, 71668 nonzeros
Variable types: 30 continuous, 1400 integer (1400 binary)
Found heuristic solution: objective 52104.000000

Root relaxation: objective 3.913520e+04, 15508 iterations, 1.08 seconds

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

     0     0 39135.2000    0   14 52104.0000 39135.2000  24.9%     -    1s
H    0     0                    39161.000000 39135.2000  0.07%     -    1s
H    0     0                    39155.000000 39135.2000  0.05%     -    1s
H    0     0                    39146.000000 39135.2000  0.03%     -    1s
     0     0 39135.7107    0   28 39146.0000 39135.7107  0.03%     -    1s
     0     0 39135.7107    0   12 39146.0000 39135.7107  0.03%     -    1s
     0     0 39135.9124    0   30 39146.0000 39135.9124  0.03%     -    1s
H    0     0                    39143.000000 39135.9124  0.02%     -    1s
     0     0 39136.0245    0   32 39143.0000 39136.0245  0.02%     -    1s
     0     2 39136.2902    0   32 39143.0000 39136.2902  0.02%     -    1s
H  172    69                    39141.000000 39137.7993  0.01%  15.2    2s

Cutting planes:
  Gomory: 12
  Cover: 1
  MIR: 21
  Zero half: 9

Explored 172 nodes (19855 simplex iterations) in 2.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.914100000000e+04, best bound 3.913800000000e+04, gap 0.0077%