Gurobi 5.6.3 (linux64) logging started Wed Oct 8 00:48:33 2014 Optimize a model with 29413 rows, 29412 columns and 87894 nonzeros Presolve time: 0.70s Presolved: 29413 rows, 29412 columns, 87894 nonzeros Variable types: 0 continuous, 29412 integer (29412 binary) Found heuristic solution: objective 18.9276060 Root relaxation: objective 1.252063e+01, 1963 iterations, 0.20 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 12.5206263 12.52063 0.00% - 0s Explored 0 nodes (1963 simplex iterations) in 0.98 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.252062625723e+01, best bound 1.252062625723e+01, gap 0.0%