Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:53:19 2012 Optimize a model with 163 rows, 100 columns and 505 nonzeros Presolve time: 0.00s Presolved: 163 rows, 100 columns, 505 nonzeros Variable types: 0 continuous, 100 integer (100 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 0.000000e+00, 32 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 19 43.00000 0.00000 100% - 0s H 0 0 41.0000000 0.00000 100% - 0s H 0 0 39.0000000 0.00000 100% - 0s 0 0 0.85526 0 21 39.00000 0.85526 97.8% - 0s 0 0 0.85526 0 21 39.00000 0.85526 97.8% - 0s 0 0 0.85526 0 21 39.00000 0.85526 97.8% - 0s H 0 0 38.0000000 0.85526 97.7% - 0s H 0 0 37.0000000 0.85526 97.7% - 0s 0 2 0.93750 0 21 37.00000 0.93750 97.5% - 0s * 19 17 10 36.0000000 5.50000 84.7% 23.0 0s * 27 18 14 34.0000000 5.50000 83.8% 18.7 0s * 50 25 10 32.0000000 5.53571 82.7% 17.8 0s H 441 77 31.0000000 20.00000 35.5% 14.1 0s Cutting planes: Gomory: 1 Zero half: 9 Explored 904 nodes (11726 simplex iterations) in 0.23 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%