Gurobi 5.6.3 (linux64) logging started Tue Oct 7 23:07:31 2014 Optimize a model with 18361 rows, 18360 columns and 54810 nonzeros Presolve time: 0.37s Presolved: 18361 rows, 18360 columns, 54810 nonzeros Variable types: 0 continuous, 18360 integer (18360 binary) Found heuristic solution: objective 16.1935335 Root relaxation: objective 1.155055e+01, 1680 iterations, 0.13 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 11.5505479 11.55055 0.00% - 0s Explored 0 nodes (1680 simplex iterations) in 0.54 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.155054794636e+01, best bound 1.155054794636e+01, gap 0.0%