Gurobi 5.6.3 (linux64) logging started Wed Oct 8 00:36:13 2014 Optimize a model with 28057 rows, 28056 columns and 83834 nonzeros Presolve time: 0.66s Presolved: 28057 rows, 28056 columns, 83834 nonzeros Variable types: 0 continuous, 28056 integer (28056 binary) Found heuristic solution: objective 17.5646240 Root relaxation: objective 1.296791e+01, 1954 iterations, 0.19 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 12.9679128 12.96791 0.00% - 0s Explored 0 nodes (1954 simplex iterations) in 0.92 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.296791280028e+01, best bound 1.296791280028e+01, gap 0.0%