Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:50:15 2012 Optimize a model with 603 rows, 109 columns and 1206 nonzeros Presolve removed 220 rows and 0 columns Presolve time: 0.00s Presolved: 383 rows, 109 columns, 967 nonzeros Variable types: 0 continuous, 109 integer (109 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.842857e+01, 247 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38.42857 0 106 26.00000 38.42857 47.8% - 0s H 0 0 28.0000000 38.42857 37.2% - 0s 0 0 37.90870 0 105 28.00000 37.90870 35.4% - 0s 0 0 37.64234 0 108 28.00000 37.64234 34.4% - 0s 0 0 37.45880 0 105 28.00000 37.45880 33.8% - 0s 0 0 37.32788 0 107 28.00000 37.32788 33.3% - 0s H 0 0 29.0000000 37.32788 28.7% - 0s 0 0 37.26807 0 106 29.00000 37.26807 28.5% - 0s 0 0 37.08424 0 107 29.00000 37.08424 27.9% - 0s 0 0 37.00064 0 108 29.00000 37.00064 27.6% - 0s 0 0 36.92549 0 108 29.00000 36.92549 27.3% - 0s 0 0 36.83972 0 107 29.00000 36.83972 27.0% - 0s H 0 0 30.0000000 36.83972 22.8% - 0s 0 0 36.80435 0 108 30.00000 36.80435 22.7% - 0s 0 0 36.75772 0 107 30.00000 36.75772 22.5% - 0s 0 0 36.71111 0 108 30.00000 36.71111 22.4% - 0s 0 0 36.67551 0 108 30.00000 36.67551 22.3% - 0s 0 0 36.65473 0 109 30.00000 36.65473 22.2% - 0s 0 0 36.64609 0 108 30.00000 36.64609 22.2% - 0s 0 0 36.63105 0 109 30.00000 36.63105 22.1% - 0s 0 0 36.63105 0 109 30.00000 36.63105 22.1% - 0s 0 2 36.62763 0 109 30.00000 36.62763 22.1% - 0s * 221 54 11 31.0000000 35.35294 14.0% 24.9 0s 695 134 32.66667 24 70 31.00000 34.05769 9.86% 27.9 5s Cutting planes: Gomory: 5 Zero half: 39 Explored 1223 nodes (30354 simplex iterations) in 5.31 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%