Gurobi 5.6.3 (linux64) logging started Tue Oct 7 20:57:58 2014 Optimize a model with 7311 rows, 7310 columns and 21760 nonzeros Presolve time: 0.15s Presolved: 7311 rows, 7310 columns, 21760 nonzeros Variable types: 0 continuous, 7310 integer (7310 binary) Found heuristic solution: objective 12.9746788 Root relaxation: objective 9.068380e+00, 864 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 9.0683801 9.06838 0.00% - 0s Explored 0 nodes (864 simplex iterations) in 0.20 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.068380079577e+00, best bound 9.068380079577e+00, gap 0.0%