Gurobi 5.6.3 (linux64) logging started Tue Oct 7 21:48:33 2014 Optimize a model with 12211 rows, 12210 columns and 36410 nonzeros Presolve time: 0.20s Presolved: 12211 rows, 12210 columns, 36410 nonzeros Variable types: 0 continuous, 12210 integer (12210 binary) Found heuristic solution: objective 16.4691412 Root relaxation: objective 1.077846e+01, 1348 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 10.7784567 10.77846 0.00% - 0s Explored 0 nodes (1348 simplex iterations) in 0.31 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.077845674064e+01, best bound 1.077845674064e+01, gap 0.0%