Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:50:30 2012 Optimize a model with 655 rows, 109 columns and 1310 nonzeros Presolve removed 245 rows and 0 columns Presolve time: 0.00s Presolved: 410 rows, 109 columns, 1055 nonzeros Variable types: 0 continuous, 109 integer (109 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.781275e+01, 240 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37.81275 0 109 26.00000 37.81275 45.4% - 0s 0 0 37.00000 0 107 26.00000 37.00000 42.3% - 0s 0 0 36.99977 0 106 26.00000 36.99977 42.3% - 0s 0 0 36.67062 0 107 26.00000 36.67062 41.0% - 0s H 0 0 28.0000000 36.67062 31.0% - 0s 0 0 36.58428 0 106 28.00000 36.58428 30.7% - 0s 0 0 36.42810 0 106 28.00000 36.42810 30.1% - 0s 0 0 36.33192 0 108 28.00000 36.33192 29.8% - 0s 0 0 36.23877 0 108 28.00000 36.23877 29.4% - 0s 0 0 36.20251 0 108 28.00000 36.20251 29.3% - 0s H 0 0 29.0000000 36.20251 24.8% - 0s 0 0 36.14876 0 107 29.00000 36.14876 24.7% - 0s 0 0 36.08753 0 107 29.00000 36.08753 24.4% - 0s 0 0 36.06227 0 108 29.00000 36.06227 24.4% - 0s 0 0 36.05131 0 108 29.00000 36.05131 24.3% - 0s 0 0 36.05131 0 108 29.00000 36.05131 24.3% - 0s 0 2 36.05019 0 108 29.00000 36.05019 24.3% - 0s * 85 27 12 30.0000000 35.29231 17.6% 34.1 0s Cutting planes: Zero half: 65 Explored 951 nodes (24331 simplex iterations) in 0.89 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+01, best bound 3.000000000000e+01, gap 0.0%