Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:43:56 2012 Optimize a model with 1219 rows, 71 columns and 2438 nonzeros Presolve removed 869 rows and 0 columns Presolve time: 0.02s Presolved: 350 rows, 71 columns, 2178 nonzeros Variable types: 0 continuous, 71 integer (71 binary) Found heuristic solution: objective 6.0000000 Root relaxation: objective 1.132199e+01, 176 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 11.32199 0 66 6.00000 11.32199 88.7% - 0s H 0 0 7.0000000 11.32199 61.7% - 0s 0 0 11.04330 0 68 7.00000 11.04330 57.8% - 0s H 0 0 8.0000000 11.04330 38.0% - 0s 0 0 11.02521 0 66 8.00000 11.02521 37.8% - 0s 0 0 11.00911 0 67 8.00000 11.00911 37.6% - 0s 0 0 10.99553 0 64 8.00000 10.99553 37.4% - 0s 0 0 10.99280 0 68 8.00000 10.99280 37.4% - 0s 0 0 10.99064 0 67 8.00000 10.99064 37.4% - 0s 0 0 10.99036 0 68 8.00000 10.99036 37.4% - 0s 0 0 10.98970 0 68 8.00000 10.98970 37.4% - 0s 0 2 10.98917 0 68 8.00000 10.98917 37.4% - 0s * 30 5 4 9.0000000 10.66430 18.5% 37.6 0s Cutting planes: Clique: 27 Zero half: 6 Explored 36 nodes (1613 simplex iterations) in 0.25 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%