Gurobi 5.6.3 (linux64) logging started Wed Oct 8 01:46:55 2014 Optimize a model with 35533 rows, 35532 columns and 106220 nonzeros Presolve time: 0.93s Presolved: 35533 rows, 35532 columns, 106220 nonzeros Variable types: 0 continuous, 35532 integer (35532 binary) Found heuristic solution: objective 18.7804956 Root relaxation: objective 1.420571e+01, 2491 iterations, 0.32 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 14.20571 0 202 18.78050 14.20571 24.4% - 1s H 0 0 15.5674950 14.20571 8.75% - 1s H 0 0 14.2124265 14.20571 0.05% - 1s 0 0 cutoff 0 14.21243 14.21243 0.00% - 1s Cutting planes: Gomory: 1 Zero half: 8 Explored 0 nodes (2501 simplex iterations) in 1.85 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.421242652337e+01, best bound 1.421242652337e+01, gap 0.0%