Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:59:18 2013

Optimize a model with 1604 rows, 42638 columns and 2187736 nonzeros
Presolve removed 40 rows and 242 columns (presolve time = 5s) ...
Presolve removed 40 rows and 242 columns
Presolve time: 6.47s
Presolved: 1564 rows, 42396 columns, 2172999 nonzeros
Variable types: 0 continuous, 42396 integer (42396 binary)
Found heuristic solution: objective 18338.000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    7832    1.5181416e+04   1.949254e+02   0.000000e+00      5s
    8753    1.5194500e+04   0.000000e+00   0.000000e+00      7s

Root relaxation: objective 1.519450e+04, 8753 iterations, 6.83 seconds

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

     0     0 15194.5000    0  102 18338.0000 15194.5000  17.1%     -   14s
H    0     0                    15385.000000 15194.5000  1.24%     -   16s
*    0     0               0    15196.000000 15196.0000   0.0%     -   18s

Cutting planes:
  Clique: 9
  Zero half: 14

Explored 0 nodes (9737 simplex iterations) in 18.61 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.519600000000e+04, best bound 1.519600000000e+04, gap 0.0%