Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:39:49 2012 Optimize a model with 183 rows, 129 columns and 584 nonzeros Presolve time: 0.00s Presolved: 183 rows, 129 columns, 584 nonzeros Variable types: 0 continuous, 129 integer (129 binary) Found heuristic solution: objective 43.0000000 Found heuristic solution: objective 40.0000000 Root relaxation: objective 0.000000e+00, 60 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 38 40.00000 0.00000 100% - 0s H 0 0 33.0000000 0.00000 100% - 0s H 0 0 32.0000000 0.00000 100% - 0s H 0 0 31.0000000 0.00000 100% - 0s 0 0 0.55556 0 40 31.00000 0.55556 98.2% - 0s 0 0 0.85185 0 40 31.00000 0.85185 97.3% - 0s 0 0 0.85185 0 41 31.00000 0.85185 97.3% - 0s 0 0 0.87037 0 41 31.00000 0.87037 97.2% - 0s 0 0 0.88889 0 40 31.00000 0.88889 97.1% - 0s 0 0 0.92500 0 41 31.00000 0.92500 97.0% - 0s 0 0 0.96169 0 45 31.00000 0.96169 96.9% - 0s 0 0 1.00000 0 40 31.00000 1.00000 96.8% - 0s H 0 0 28.0000000 1.00000 96.4% - 0s 0 0 1.00000 0 40 28.00000 1.00000 96.4% - 0s 0 0 1.00000 0 40 28.00000 1.00000 96.4% - 0s 0 2 1.00000 0 40 28.00000 1.00000 96.4% - 0s * 17 17 10 22.0000000 3.74074 83.0% 30.9 0s * 97 41 7 21.0000000 9.60000 54.3% 21.6 0s * 144 31 9 19.0000000 10.59596 44.2% 20.3 0s Cutting planes: Gomory: 1 Zero half: 6 Explored 205 nodes (4220 simplex iterations) in 0.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%