Gurobi 5.6.3 (linux64) logging started Wed Oct  8 00:55:12 2014

Optimize a model with 30103 rows, 30102 columns and 89960 nonzeros
Presolve time: 0.70s
Presolved: 30103 rows, 30102 columns, 89960 nonzeros
Variable types: 0 continuous, 30102 integer (30102 binary)
Found heuristic solution: objective 21.0576324

Root relaxation: objective 1.323998e+01, 2298 iterations, 0.25 seconds

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

     0     0   13.23998    0  166   21.05763   13.23998  37.1%     -    1s
H    0     0                      13.2419250   13.23998  0.01%     -    1s
     0     0     cutoff    0        13.24192   13.24192  0.00%     -    1s

Cutting planes:
  Gomory: 1
  Zero half: 1

Explored 0 nodes (2300 simplex iterations) in 1.31 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.324192495588e+01, best bound 1.324192495588e+01, gap 0.0%