Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:08:03 2013

Optimize a model with 1719 rows, 58773 columns and 2543396 nonzeros
Presolve removed 24 rows and 72 columns (presolve time = 5s) ...
Presolve removed 34 rows and 150 columns (presolve time = 10s) ...
Presolve removed 37 rows and 213 columns
Presolve time: 15.11s
Presolved: 1682 rows, 58560 columns, 2532219 nonzeros
Variable types: 0 continuous, 58560 integer (58560 binary)
Found heuristic solution: objective 26613.000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    7940    1.8767484e+04   3.908231e+02   0.000000e+00      5s
   11815    1.8994493e+04   3.298759e+02   0.000000e+00     10s
   14940    1.9038448e+04   6.920123e+01   0.000000e+00     15s
   16353    1.9041450e+04   0.000000e+00   0.000000e+00     19s

Root relaxation: objective 1.904145e+04, 16353 iterations, 18.79 seconds
Total elapsed time = 35.24s

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

     0     0 19041.4500    0  144 26613.0000 19041.4500  28.5%     -   36s
H    0     0                    19649.000000 19041.4500  3.09%     -   39s
*    0     0               0    19109.000000 19109.0000   0.0%     -   43s

Cutting planes:
  Clique: 26
  Zero half: 36

Explored 0 nodes (19223 simplex iterations) in 43.44 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.910900000000e+04, best bound 1.910900000000e+04, gap 0.0%