Gurobi 5.0.1 (linux64) logging started Mon Feb  4 17:38:16 2013

Optimize a model with 1807 rows, 57077 columns and 2834226 nonzeros
Presolve removed 19 rows and 91 columns (presolve time = 5s) ...
Presolve removed 44 rows and 426 columns (presolve time = 10s) ...
Presolve removed 49 rows and 536 columns
Presolve time: 14.45s
Presolved: 1758 rows, 56541 columns, 2805225 nonzeros
Variable types: 0 continuous, 56541 integer (56541 binary)
Found heuristic solution: objective 32490.000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    8069    1.9576063e+04   8.692643e+03   0.000000e+00      5s
   11681    1.9739747e+04   1.955841e+03   0.000000e+00     10s
   14519    1.9767084e+04   1.426970e+03   0.000000e+00     15s
   14918    1.9768667e+04   0.000000e+00   0.000000e+00     16s

Root relaxation: objective 1.976867e+04, 14918 iterations, 16.17 seconds

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

     0     0 19768.6667    0   67 32490.0000 19768.6667  39.2%     -   31s
H    0     0                    19821.000000 19768.6667  0.26%     -   32s
H    0     0                    19803.000000 19768.6667  0.17%     -   34s
*    0     0               0    19769.000000 19769.0000   0.0%     -   35s

Cutting planes:
  Clique: 4
  Zero half: 32

Explored 0 nodes (16060 simplex iterations) in 35.90 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.976900000000e+04, best bound 1.976900000000e+04, gap 0.0%