Gurobi 5.6.3 (linux64) logging started Wed Oct 8 00:03:56 2014 Optimize a model with 24181 rows, 24180 columns and 72230 nonzeros Presolve time: 0.53s Presolved: 24181 rows, 24180 columns, 72230 nonzeros Variable types: 0 continuous, 24180 integer (24180 binary) Found heuristic solution: objective 22.0733290 Root relaxation: objective 1.245403e+01, 1895 iterations, 0.17 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 12.4540272 12.45403 0.00% - 0s Explored 0 nodes (1895 simplex iterations) in 0.76 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.245402723173e+01, best bound 1.245402723173e+01, gap 0.0%