Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:55 2012 Optimize a model with 1685 rows, 83 columns and 3370 nonzeros Presolve removed 1191 rows and 0 columns Presolve time: 0.04s Presolved: 494 rows, 83 columns, 3101 nonzeros Variable types: 0 continuous, 83 integer (83 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.286964e+01, 227 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 12.86964 0 77 6.00000 12.86964 114% - 0s H 0 0 7.0000000 12.86964 83.9% - 0s 0 0 12.47826 0 82 7.00000 12.47826 78.3% - 0s 0 0 12.41634 0 81 7.00000 12.41634 77.4% - 0s H 0 0 9.0000000 12.41634 38.0% - 0s 0 0 12.40484 0 82 9.00000 12.40484 37.8% - 0s 0 0 12.38874 0 83 9.00000 12.38874 37.7% - 0s 0 0 12.37938 0 83 9.00000 12.37938 37.5% - 0s 0 0 12.37933 0 83 9.00000 12.37933 37.5% - 0s 0 2 12.37851 0 83 9.00000 12.37851 37.5% - 0s Cutting planes: Clique: 39 Zero half: 6 Explored 51 nodes (3165 simplex iterations) in 0.50 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%