Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:21 2012 Optimize a model with 708 rows, 54 columns and 1416 nonzeros Presolve removed 479 rows and 0 columns Presolve time: 0.01s Presolved: 229 rows, 54 columns, 1268 nonzeros Variable types: 0 continuous, 54 integer (54 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 9.643342e+00, 159 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 9.64334 0 51 6.00000 9.64334 60.7% - 0s H 0 0 7.0000000 9.64334 37.8% - 0s 0 0 9.42207 0 53 7.00000 9.42207 34.6% - 0s 0 0 9.38360 0 53 7.00000 9.38360 34.1% - 0s 0 0 9.35153 0 53 7.00000 9.35153 33.6% - 0s 0 0 9.33919 0 52 7.00000 9.33919 33.4% - 0s 0 0 9.31268 0 52 7.00000 9.31268 33.0% - 0s 0 0 9.29291 0 51 7.00000 9.29291 32.8% - 0s 0 0 9.29176 0 52 7.00000 9.29176 32.7% - 0s 0 2 9.29109 0 52 7.00000 9.29109 32.7% - 0s Cutting planes: Gomory: 1 Clique: 18 Zero half: 6 Explored 25 nodes (1057 simplex iterations) in 0.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%