Gurobi 5.6.3 (linux64) logging started Wed Oct  8 04:08:22 2014

Optimize a model with 48621 rows, 48620 columns and 145420 nonzeros
Presolve time: 1.23s
Presolved: 48621 rows, 48620 columns, 145420 nonzeros
Variable types: 0 continuous, 48620 integer (48620 binary)
Found heuristic solution: objective 24.9782705

Root relaxation: objective 1.492400e+01, 2567 iterations, 0.36 seconds

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

*    0     0               0      14.9240047   14.92400  0.00%     -    1s

Explored 0 nodes (2567 simplex iterations) in 1.72 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.492400467876e+01, best bound 1.492400467876e+01, gap 0.0%