Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:35:20 2013

Optimize a model with 2170 rows, 77185 columns and 4178237 nonzeros
Presolve removed 24 rows and 104 columns (presolve time = 5s) ...
Presolve removed 31 rows and 104 columns
Presolve time: 8.32s
Presolved: 2139 rows, 77081 columns, 4173781 nonzeros
Variable types: 0 continuous, 77081 integer (77081 binary)
Found heuristic solution: objective 38242.000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    7952    2.8495721e+04   2.254641e+03   0.000000e+00      5s
   11774    2.8996501e+04   2.067821e+03   0.000000e+00     10s
   14420    2.9152581e+04   6.499836e+02   0.000000e+00     15s
   16772    2.9212027e+04   2.452311e+03   0.000000e+00     20s
   18536    2.9232286e+04   6.960633e+02   0.000000e+00     25s
   20153    2.9247658e+04   1.255113e+02   0.000000e+00     30s
   21329    2.9255625e+04   1.394384e+01   0.000000e+00     35s
   21413    2.9255625e+04   0.000000e+00   0.000000e+00     35s

Root relaxation: objective 2.925563e+04, 21413 iterations, 35.47 seconds
Total elapsed time = 45.76s

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

     0     0 29255.6250    0  117 38242.0000 29255.6250  23.5%     -   46s
H    0     0                    30685.000000 29255.6250  4.66%     -   48s
*    0     0               0    29257.000000 29257.0000   0.0%     -   79s

Cutting planes:
  Clique: 6
  Zero half: 1

Explored 0 nodes (23749 simplex iterations) in 79.86 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.925700000000e+04, best bound 2.925700000000e+04, gap 0.0%