Gurobi 5.6.3 (linux64) logging started Wed Oct 8 01:29:35 2014 Optimize a model with 33673 rows, 33672 columns and 100650 nonzeros Presolve time: 0.84s Presolved: 33673 rows, 33672 columns, 100650 nonzeros Variable types: 0 continuous, 33672 integer (33672 binary) Found heuristic solution: objective 24.8892030 Root relaxation: objective 1.358745e+01, 2219 iterations, 0.25 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 13.5874461 13.58745 0.00% - 1s Explored 0 nodes (2219 simplex iterations) in 1.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.358744610866e+01, best bound 1.358744610866e+01, gap 0.0%