Gurobi 5.0.1 (linux64) logging started Mon Feb  4 16:56:30 2013

Optimize a model with 1429 rows, 37945 columns and 1715269 nonzeros
Presolve removed 25 rows and 0 columns
Presolve time: 1.40s
Presolved: 1404 rows, 37945 columns, 1714472 nonzeros
Variable types: 0 continuous, 37945 integer (37945 binary)
Found heuristic solution: objective 16367.000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    8539    1.2551286e+04   7.583284e+02   0.000000e+00      5s
    9192    1.2556143e+04   0.000000e+00   0.000000e+00      6s

Root relaxation: objective 1.255614e+04, 9192 iterations, 5.83 seconds

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

     0     0 12556.1429    0   53 16367.0000 12556.1429  23.3%     -    7s
H    0     0                    12617.000000 12556.1429  0.48%     -    8s
*    0     0               0    12557.000000 12557.0000   0.0%     -    9s

Cutting planes:
  Clique: 5
  Zero half: 23

Explored 0 nodes (9785 simplex iterations) in 9.86 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.255700000000e+04, best bound 1.255700000000e+04, gap 0.0%