Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:13:12 2013

Optimize a model with 2188 rows, 75854 columns and 4256563 nonzeros
Presolve removed 4 rows and 74 columns (presolve time = 5s) ...
Presolve removed 36 rows and 392 columns (presolve time = 11s) ...
Presolve removed 44 rows and 548 columns (presolve time = 16s) ...
Presolve removed 45 rows and 574 columns (presolve time = 21s) ...
Presolve removed 45 rows and 574 columns
Presolve time: 21.19s
Presolved: 2143 rows, 75280 columns, 4224808 nonzeros
Variable types: 0 continuous, 75280 integer (75280 binary)
Found heuristic solution: objective 43132.000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    7528    2.7695564e+04   1.328420e+03   0.000000e+00      5s
   11497    2.8188992e+04   8.745167e+02   0.000000e+00     10s
   14584    2.8376099e+04   4.445663e+02   0.000000e+00     15s
   16936    2.8446234e+04   9.153455e+02   0.000000e+00     20s
   19141    2.8482304e+04   2.740295e+02   0.000000e+00     25s
   20758    2.8498464e+04   1.493852e+02   0.000000e+00     30s
   21934    2.8501750e+04   1.070883e+03   0.000000e+00     35s
   22224    2.8502125e+04   0.000000e+00   0.000000e+00     36s

Root relaxation: objective 2.850212e+04, 22224 iterations, 36.47 seconds

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

     0     0 28502.1250    0  140 43132.0000 28502.1250  33.9%     -   59s
H    0     0                    29955.000000 28502.1250  4.85%     -   61s
*    0     0               0    28508.000000 28508.0000   0.0%     -   94s

Cutting planes:
  Clique: 12
  Zero half: 21

Explored 0 nodes (23600 simplex iterations) in 94.45 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.850799999997e+04, best bound 2.850799999997e+04, gap 0.0%