Gurobi 5.0.1 (linux64) logging started Sun Nov 18 00:15:22 2012 Optimize a model with 237 rows, 169 columns and 759 nonzeros Presolve time: 0.00s Presolved: 237 rows, 169 columns, 759 nonzeros Variable types: 0 continuous, 169 integer (169 binary) Found heuristic solution: objective 57.0000000 Root relaxation: objective 0.000000e+00, 85 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 50 57.00000 0.00000 100% - 0s H 0 0 50.0000000 0.00000 100% - 0s H 0 0 45.0000000 0.00000 100% - 0s H 0 0 44.0000000 0.00000 100% - 0s 0 0 0.50000 0 51 44.00000 0.50000 98.9% - 0s 0 0 0.58462 0 53 44.00000 0.58462 98.7% - 0s 0 0 0.71282 0 53 44.00000 0.71282 98.4% - 0s 0 0 0.71481 0 54 44.00000 0.71481 98.4% - 0s 0 0 0.71481 0 54 44.00000 0.71481 98.4% - 0s 0 2 0.73611 0 54 44.00000 0.73611 98.3% - 0s H 27 27 31.0000000 5.20833 83.2% 25.6 0s * 38 27 24 29.0000000 5.20833 82.0% 20.4 0s * 175 112 14 28.0000000 9.38971 66.5% 24.3 0s * 198 116 19 27.0000000 10.22868 62.1% 23.1 0s * 512 166 12 26.0000000 15.19524 41.6% 20.2 0s * 562 161 13 25.0000000 15.48333 38.1% 19.9 0s * 688 134 13 23.0000000 15.98214 30.5% 19.4 0s Cutting planes: Gomory: 1 Zero half: 2 Mod-K: 1 Explored 1121 nodes (19981 simplex iterations) in 0.55 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.300000000000e+01, best bound 2.300000000000e+01, gap 0.0%