Gurobi 5.6.3 (linux64) logging started Tue Oct 7 21:56:52 2014 Optimize a model with 12883 rows, 12882 columns and 38420 nonzeros Presolve time: 0.23s Presolved: 12883 rows, 12882 columns, 38420 nonzeros Variable types: 0 continuous, 12882 integer (12882 binary) Found heuristic solution: objective 19.2268135 Root relaxation: objective 1.066100e+01, 1244 iterations, 0.08 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 10.66100 0 86 19.22681 10.66100 44.6% - 0s H 0 0 10.8086055 10.66100 1.37% - 0s H 0 0 10.6962142 10.66100 0.33% - 0s * 0 0 0 10.6707278 10.67073 0.00% - 0s Cutting planes: Gomory: 1 Zero half: 3 Explored 0 nodes (1270 simplex iterations) in 0.45 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.067072779978e+01, best bound 1.067072779978e+01, gap 0.0%