Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:48 2012 Optimize a model with 1130 rows, 68 columns and 2260 nonzeros Presolve removed 810 rows and 0 columns Presolve time: 0.02s Presolved: 320 rows, 68 columns, 1886 nonzeros Variable types: 0 continuous, 68 integer (68 binary) Found heuristic solution: objective 5.0000000 Root relaxation: objective 1.130377e+01, 195 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 11.30377 0 64 5.00000 11.30377 126% - 0s H 0 0 6.0000000 11.30377 88.4% - 0s H 0 0 7.0000000 11.30377 61.5% - 0s 0 0 11.05913 0 64 7.00000 11.05913 58.0% - 0s 0 0 10.97995 0 67 7.00000 10.97995 56.9% - 0s 0 0 10.92714 0 68 7.00000 10.92714 56.1% - 0s 0 0 10.92295 0 67 7.00000 10.92295 56.0% - 0s 0 0 10.90765 0 67 7.00000 10.90765 55.8% - 0s 0 0 10.87620 0 67 7.00000 10.87620 55.4% - 0s 0 0 10.85654 0 66 7.00000 10.85654 55.1% - 0s 0 0 10.85302 0 66 7.00000 10.85302 55.0% - 0s 0 0 10.84438 0 66 7.00000 10.84438 54.9% - 0s H 0 0 8.0000000 10.84438 35.6% - 0s 0 0 10.83930 0 66 8.00000 10.83930 35.5% - 0s 0 0 10.82656 0 66 8.00000 10.82656 35.3% - 0s 0 0 10.82099 0 68 8.00000 10.82099 35.3% - 0s 0 2 10.82029 0 68 8.00000 10.82029 35.3% - 0s Cutting planes: Clique: 35 Zero half: 5 Explored 34 nodes (1908 simplex iterations) in 0.31 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%