Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:55 2012 Optimize a model with 1233 rows, 71 columns and 2466 nonzeros Presolve removed 870 rows and 0 columns Presolve time: 0.02s Presolved: 363 rows, 71 columns, 2261 nonzeros Variable types: 0 continuous, 71 integer (71 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.114660e+01, 253 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 11.14660 0 64 6.00000 11.14660 85.8% - 0s H 0 0 7.0000000 11.14660 59.2% - 0s 0 0 10.93436 0 67 7.00000 10.93436 56.2% - 0s 0 0 10.82863 0 70 7.00000 10.82863 54.7% - 0s H 0 0 8.0000000 10.82863 35.4% - 0s 0 0 10.79570 0 68 8.00000 10.79570 34.9% - 0s 0 0 10.78803 0 69 8.00000 10.78803 34.9% - 0s 0 0 10.78214 0 70 8.00000 10.78214 34.8% - 0s 0 0 10.78146 0 69 8.00000 10.78146 34.8% - 0s 0 0 10.78083 0 69 8.00000 10.78083 34.8% - 0s 0 2 10.77949 0 69 8.00000 10.77949 34.7% - 0s Cutting planes: Clique: 27 Zero half: 8 Explored 42 nodes (2081 simplex iterations) in 0.30 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%