Gurobi 5.6.3 (linux64) logging started Tue Oct 7 22:12:18 2014 Optimize a model with 14281 rows, 14280 columns and 42602 nonzeros Presolve time: 0.26s Presolved: 14281 rows, 14280 columns, 42602 nonzeros Variable types: 0 continuous, 14280 integer (14280 binary) Found heuristic solution: objective 16.0229222 Root relaxation: objective 1.139381e+01, 1508 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 11.39381 0 148 16.02292 11.39381 28.9% - 0s H 0 0 11.4825204 11.39381 0.77% - 0s H 0 0 11.4074986 11.39381 0.12% - 0s 0 0 11.39833 0 199 11.40750 11.39833 0.08% - 0s 0 0 cutoff 0 11.40750 11.40750 0.00% - 0s Explored 0 nodes (1520 simplex iterations) in 0.61 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.140749862902e+01, best bound 1.140749862902e+01, gap 0.0%