Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:22:25 2012 Optimize a model with 253 rows, 195 columns and 825 nonzeros Presolve removed 0 rows and 1 columns Presolve time: 0.00s Presolved: 253 rows, 194 columns, 824 nonzeros Variable types: 0 continuous, 194 integer (193 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 0.000000e+00, 97 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 67 50.00000 0.00000 100% - 0s H 0 0 49.0000000 0.00000 100% - 0s H 0 0 46.0000000 0.00000 100% - 0s H 0 0 44.0000000 0.00000 100% - 0s 0 0 0.48485 0 70 44.00000 0.48485 98.9% - 0s H 0 0 43.0000000 0.48485 98.9% - 0s 0 0 1.11608 0 72 43.00000 1.11608 97.4% - 0s H 0 0 42.0000000 1.11608 97.3% - 0s 0 0 1.11808 0 73 42.00000 1.11808 97.3% - 0s 0 0 1.11808 0 73 42.00000 1.11808 97.3% - 0s H 0 0 38.0000000 1.11808 97.1% - 0s H 0 0 35.0000000 1.11808 96.8% - 0s H 0 0 33.0000000 1.11808 96.6% - 0s 0 2 1.11808 0 73 33.00000 1.11808 96.6% - 0s * 26 26 17 26.0000000 3.07459 88.2% 32.0 0s * 44 34 13 24.0000000 3.31166 86.2% 32.1 0s * 66 42 12 23.0000000 4.93961 78.5% 30.7 0s * 148 80 12 22.0000000 6.90748 68.6% 29.3 0s * 165 78 15 21.0000000 6.90748 67.1% 27.1 0s * 337 73 10 20.0000000 9.94327 50.3% 25.1 0s Cutting planes: Gomory: 4 Zero half: 1 Explored 510 nodes (12608 simplex iterations) in 0.41 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%