Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:50 2012 Optimize a model with 1217 rows, 69 columns and 2434 nonzeros Presolve removed 861 rows and 0 columns Presolve time: 0.02s Presolved: 356 rows, 69 columns, 2249 nonzeros Variable types: 0 continuous, 69 integer (69 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.088406e+01, 252 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 10.88406 0 62 7.00000 10.88406 55.5% - 0s H 0 0 9.0000000 10.88406 20.9% - 0s 0 0 10.56321 0 65 9.00000 10.56321 17.4% - 0s 0 0 10.52167 0 65 9.00000 10.52167 16.9% - 0s 0 0 10.48662 0 65 9.00000 10.48662 16.5% - 0s 0 0 10.42282 0 66 9.00000 10.42282 15.8% - 0s 0 0 10.36108 0 67 9.00000 10.36108 15.1% - 0s 0 0 10.35336 0 67 9.00000 10.35336 15.0% - 0s 0 0 10.35223 0 67 9.00000 10.35223 15.0% - 0s 0 0 10.35085 0 67 9.00000 10.35085 15.0% - 0s 0 2 10.34761 0 67 9.00000 10.34761 15.0% - 0s Cutting planes: Clique: 34 Zero half: 1 Explored 7 nodes (615 simplex iterations) in 0.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%