Gurobi 5.6.3 (linux64) logging started Wed Oct 8 01:35:59 2014 Optimize a model with 34411 rows, 34410 columns and 102860 nonzeros Presolve time: 0.90s Presolved: 34411 rows, 34410 columns, 102860 nonzeros Variable types: 0 continuous, 34410 integer (34410 binary) Found heuristic solution: objective 20.2264953 Root relaxation: objective 1.342489e+01, 2265 iterations, 0.27 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 13.4248866 13.42489 0.00% - 1s Explored 0 nodes (2265 simplex iterations) in 1.25 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.342488658009e+01, best bound 1.342488658009e+01, gap 0.0%