Gurobi 5.6.3 (linux64) logging started Tue Oct 7 21:41:48 2014 Optimize a model with 11773 rows, 11772 columns and 35100 nonzeros Presolve time: 0.19s Presolved: 11773 rows, 11772 columns, 35100 nonzeros Variable types: 0 continuous, 11772 integer (11772 binary) Found heuristic solution: objective 15.1505518 Root relaxation: objective 9.509156e+00, 1210 iterations, 0.06 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 9.5091563 9.50916 0.00% - 0s Explored 0 nodes (1210 simplex iterations) in 0.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.509156274320e+00, best bound 9.509156274320e+00, gap 0.0%