Gurobi 5.0.1 (linux64) logging started Mon Feb  4 18:18:36 2013

Optimize a model with 1821 rows, 62616 columns and 2884369 nonzeros
Presolve removed 17 rows and 63 columns (presolve time = 5s) ...
Presolve removed 29 rows and 203 columns (presolve time = 10s) ...
Presolve removed 33 rows and 261 columns (presolve time = 15s) ...
Presolve removed 33 rows and 261 columns
Presolve time: 16.01s
Presolved: 1788 rows, 62355 columns, 2871426 nonzeros
Variable types: 0 continuous, 62355 integer (62355 binary)
Found heuristic solution: objective 32684.000000

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    8370    2.0203856e+04   1.848501e+04   0.000000e+00      5s
   12562    2.0488482e+04   5.555318e+02   0.000000e+00     10s
   15837    2.0570546e+04   5.926961e+02   0.000000e+00     15s
   18326    2.0594078e+04   4.524900e+01   0.000000e+00     20s
   18702    2.0596333e+04   0.000000e+00   0.000000e+00     21s

Root relaxation: objective 2.059633e+04, 18702 iterations, 21.21 seconds

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

     0     0 20596.3333    0  101 32684.0000 20596.3333  37.0%     -   38s
H    0     0                    29749.000000 20596.3333  30.8%     -   39s
H    0     0                    20623.000000 20596.3333  0.13%     -  189s
H    0     0                    20599.000000 20596.3333  0.01%     -  190s
     0     0 infeasible    0      20599.0000 20598.0206  0.00%     -  191s

Cutting planes:
  Clique: 17
  Zero half: 72

Explored 0 nodes (19870 simplex iterations) in 192.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.059900000000e+04, best bound 2.059900000000e+04, gap 0.0%