Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:57:35 2012 Optimize a model with 734 rows, 123 columns and 1468 nonzeros Presolve removed 270 rows and 0 columns Presolve time: 0.00s Presolved: 464 rows, 123 columns, 1185 nonzeros Variable types: 0 continuous, 123 integer (123 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 4.167695e+01, 311 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41.67695 0 122 28.00000 41.67695 48.8% - 0s H 0 0 29.0000000 41.67695 43.7% - 0s H 0 0 31.0000000 41.67695 34.4% - 0s 0 0 41.16800 0 119 31.00000 41.16800 32.8% - 0s 0 0 41.05400 0 120 31.00000 41.05400 32.4% - 0s 0 0 40.75606 0 122 31.00000 40.75606 31.5% - 0s 0 0 40.70918 0 121 31.00000 40.70918 31.3% - 0s 0 0 40.63667 0 121 31.00000 40.63667 31.1% - 0s 0 0 40.60744 0 121 31.00000 40.60744 31.0% - 0s 0 0 40.46793 0 120 31.00000 40.46793 30.5% - 0s 0 0 40.39131 0 121 31.00000 40.39131 30.3% - 0s 0 0 40.34709 0 122 31.00000 40.34709 30.2% - 0s 0 0 40.30466 0 122 31.00000 40.30466 30.0% - 0s 0 0 40.25796 0 122 31.00000 40.25796 29.9% - 0s 0 0 40.25121 0 122 31.00000 40.25121 29.8% - 0s H 0 0 32.0000000 40.25121 25.8% - 0s 0 0 40.21591 0 121 32.00000 40.21591 25.7% - 0s 0 0 40.19099 0 121 32.00000 40.19099 25.6% - 0s 0 0 40.15074 0 122 32.00000 40.15074 25.5% - 0s 0 0 40.12977 0 121 32.00000 40.12977 25.4% - 0s 0 0 40.08945 0 121 32.00000 40.08945 25.3% - 0s 0 0 40.08469 0 121 32.00000 40.08469 25.3% - 0s 0 0 40.08469 0 120 32.00000 40.08469 25.3% - 0s 0 2 40.08431 0 120 32.00000 40.08431 25.3% - 0s H 11 11 33.0000000 39.94852 21.1% 53.4 0s H 138 44 34.0000000 38.93231 14.5% 35.3 0s 1388 148 35.00000 18 78 34.00000 36.38333 7.01% 31.8 5s Cutting planes: Gomory: 5 Zero half: 47 Explored 1728 nodes (52305 simplex iterations) in 5.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0%