Gurobi 5.0.1 (linux64) logging started Mon Feb  4 17:04:24 2013

Optimize a model with 1568 rows, 43245 columns and 2096030 nonzeros
Presolve removed 42 rows and 241 columns (presolve time = 5s) ...
Presolve removed 48 rows and 327 columns
Presolve time: 9.08s
Presolved: 1520 rows, 42918 columns, 2077583 nonzeros
Variable types: 0 continuous, 42918 integer (42918 binary)
Found heuristic solution: objective 24043.000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    7362    1.5017917e+04   1.102780e+02   0.000000e+00      5s
    8759    1.5035500e+04   0.000000e+00   0.000000e+00      8s

Root relaxation: objective 1.503550e+04, 8759 iterations, 7.53 seconds

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

     0     0 15035.5000    0   82 24043.0000 15035.5000  37.5%     -   18s
H    0     0                    16318.000000 15035.5000  7.86%     -   18s
H    0     0                    16106.000000 15035.5000  6.65%     -   25s
     0     0 15044.0000    0  125 16106.0000 15044.0000  6.59%     -   28s
     0     0 15045.0000    0   98 16106.0000 15045.0000  6.59%     -   31s
H    0     0                    15088.000000 15045.0000  0.28%     -   32s
     0     0 15045.0000    0   52 15088.0000 15045.0000  0.28%     -   34s
H    0     0                    15081.000000 15045.0000  0.24%     -   45s
     0     0 15045.0000    0   52 15081.0000 15045.0000  0.24%     -   50s
     0     0 15045.0000    0  140 15081.0000 15045.0000  0.24%     -   51s
     0     0 15045.0000    0   52 15081.0000 15045.0000  0.24%     -   53s
*    0     0               0    15045.000000 15045.0000   0.0%     -   54s

Cutting planes:
  Clique: 9
  Zero half: 7

Explored 0 nodes (20908 simplex iterations) in 54.69 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.504500000000e+04, best bound 1.504500000000e+04, gap 0.0%