Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:49:28 2012 Optimize a model with 2653 rows, 103 columns and 5306 nonzeros Presolve removed 1881 rows and 0 columns Presolve time: 0.07s Presolved: 772 rows, 103 columns, 5141 nonzeros Variable types: 0 continuous, 103 integer (103 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.459869e+01, 422 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 14.59869 0 99 6.00000 14.59869 143% - 0s H 0 0 8.0000000 14.59869 82.5% - 0s 0 0 14.23871 0 102 8.00000 14.23871 78.0% - 0s 0 0 14.19373 0 102 8.00000 14.19373 77.4% - 0s 0 0 14.19228 0 102 8.00000 14.19228 77.4% - 0s 0 0 14.19155 0 102 8.00000 14.19155 77.4% - 0s 0 2 14.19116 0 102 8.00000 14.19116 77.4% - 0s * 107 55 13 9.0000000 13.38042 48.7% 65.6 1s Cutting planes: Clique: 52 Zero half: 7 Explored 255 nodes (14809 simplex iterations) in 1.56 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%