Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:05:25 2013

Optimize a model with 1503 rows, 49883 columns and 1920741 nonzeros
Presolve removed 15 rows and 65 columns (presolve time = 5s) ...
Presolve removed 15 rows and 65 columns
Presolve time: 5.79s
Presolved: 1488 rows, 49818 columns, 1918305 nonzeros
Variable types: 0 continuous, 49818 integer (49818 binary)
Found heuristic solution: objective 24519.000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    8385    1.5341364e+04   5.711143e+02   0.000000e+00      5s
   11588    1.5399308e+04   0.000000e+00   0.000000e+00     10s

Root relaxation: objective 1.539931e+04, 11588 iterations, 9.62 seconds

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

     0     0 15399.3077    0  179 24519.0000 15399.3077  37.2%     -   17s
H    0     0                    15796.000000 15399.3077  2.51%     -   19s
H    0     0                    15411.000000 15399.3077  0.08%     -   20s
     0     0     cutoff    0      15411.0000 15410.0154  0.01%     -   21s

Cutting planes:
  Clique: 24
  Zero half: 66

Explored 0 nodes (13546 simplex iterations) in 21.59 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.541100000000e+04, best bound 1.541100000000e+04, gap 0.0%