Gurobi 5.6.3 (linux64) logging started Tue Oct 7 21:39:29 2014 Optimize a model with 11557 rows, 11556 columns and 34454 nonzeros Presolve time: 0.20s Presolved: 11557 rows, 11556 columns, 34454 nonzeros Variable types: 0 continuous, 11556 integer (11556 binary) Found heuristic solution: objective 12.6926711 Root relaxation: objective 1.028124e+01, 1310 iterations, 0.07 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 10.2812365 10.28124 0.00% - 0s Explored 0 nodes (1310 simplex iterations) in 0.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.028123645479e+01, best bound 1.028123645479e+01, gap 0.0%