Gurobi 5.6.3 (linux64) logging started Tue Oct 7 21:46:47 2014 Optimize a model with 11991 rows, 11990 columns and 35752 nonzeros Presolve time: 0.20s Presolved: 11991 rows, 11990 columns, 35752 nonzeros Variable types: 0 continuous, 11990 integer (11990 binary) Found heuristic solution: objective 19.3149720 Root relaxation: objective 1.069778e+01, 1285 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 10.6977787 10.69778 0.00% - 0s Explored 0 nodes (1285 simplex iterations) in 0.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.069777870648e+01, best bound 1.069777870648e+01, gap 0.0%