Gurobi 5.0.1 (linux64) logging started Mon Feb  4 17:55:51 2013

Optimize a model with 1662 rows, 53837 columns and 2376726 nonzeros
Presolve removed 11 rows and 98 columns (presolve time = 5s) ...
Presolve removed 37 rows and 369 columns (presolve time = 10s) ...
Presolve removed 37 rows and 369 columns
Presolve time: 10.85s
Presolved: 1625 rows, 53468 columns, 2360092 nonzeros
Variable types: 0 continuous, 53468 integer (53468 binary)
Found heuristic solution: objective 26065.000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    8843    1.8206041e+04   7.806355e+02   0.000000e+00      5s
   13025    1.8362861e+04   5.268659e+02   0.000000e+00     10s
   15731    1.8388750e+04   3.136170e+02   0.000000e+00     15s
   15958    1.8389200e+04   0.000000e+00   0.000000e+00     16s

Root relaxation: objective 1.838920e+04, 15958 iterations, 15.93 seconds

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

     0     0 18389.2000    0  163 26065.0000 18389.2000  29.4%     -   28s
H    0     0                    18588.000000 18389.2000  1.07%     -   30s
H    0     0                    18499.000000 18389.2000  0.59%     -   31s
*    0     0               0    18400.000000 18400.0000   0.0%     -   35s

Cutting planes:
  Clique: 5
  Zero half: 41

Explored 0 nodes (19132 simplex iterations) in 35.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.840000000000e+04, best bound 1.840000000000e+04, gap 0.0000%