Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:47:01 2012 Optimize a model with 2221 rows, 95 columns and 4442 nonzeros Presolve removed 1571 rows and 0 columns Presolve time: 0.06s Presolved: 650 rows, 95 columns, 4282 nonzeros Variable types: 0 continuous, 95 integer (95 binary) Found heuristic solution: objective 7.0000000 Root relaxation: objective 1.354874e+01, 325 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 13.54874 0 91 7.00000 13.54874 93.6% - 0s H 0 0 8.0000000 13.54874 69.4% - 0s 0 0 13.31190 0 91 8.00000 13.31190 66.4% - 0s 0 0 13.23004 0 91 8.00000 13.23004 65.4% - 0s 0 0 13.20297 0 93 8.00000 13.20297 65.0% - 0s 0 0 13.17421 0 93 8.00000 13.17421 64.7% - 0s 0 0 13.16166 0 93 8.00000 13.16166 64.5% - 0s 0 0 13.15673 0 94 8.00000 13.15673 64.5% - 0s 0 0 13.15598 0 93 8.00000 13.15598 64.4% - 0s 0 0 13.15596 0 94 8.00000 13.15596 64.4% - 0s 0 2 13.15571 0 94 8.00000 13.15571 64.4% - 0s * 66 29 5 9.0000000 12.72489 41.4% 55.3 0s Cutting planes: Clique: 41 Zero half: 8 Explored 156 nodes (8655 simplex iterations) in 1.16 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%