Gurobi 5.6.3 (linux64) logging started Tue Oct 7 21:12:22 2014 Optimize a model with 9121 rows, 9120 columns and 27170 nonzeros Presolve time: 0.15s Presolved: 9121 rows, 9120 columns, 27170 nonzeros Variable types: 0 continuous, 9120 integer (9120 binary) Found heuristic solution: objective 12.8768288 Root relaxation: objective 9.469728e+00, 1064 iterations, 0.05 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 9.4697284 9.46973 0.00% - 0s Explored 0 nodes (1064 simplex iterations) in 0.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.469728388143e+00, best bound 9.469728388143e+00, gap 0.0%