Gurobi 5.6.3 (linux64) logging started Wed Oct  8 04:19:31 2014

Optimize a model with 49507 rows, 49506 columns and 148074 nonzeros
Presolve time: 1.25s
Presolved: 49507 rows, 49506 columns, 148074 nonzeros
Variable types: 0 continuous, 49506 integer (49506 binary)
Found heuristic solution: objective 24.4230065

Root relaxation: objective 1.462270e+01, 2839 iterations, 0.45 seconds

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

     0     0   14.62270    0   96   24.42301   14.62270  40.1%     -    1s
H    0     0                      14.6304385   14.62270  0.05%     -    1s
H    0     0                      14.6279617   14.62270  0.04%     -    2s
     0     0     cutoff    0        14.62796   14.62796  0.00%     -    2s

Cutting planes:
  Gomory: 1
  Zero half: 1

Explored 0 nodes (2855 simplex iterations) in 2.21 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.462796168919e+01, best bound 1.462796168919e+01, gap 0.0%