Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:10 2012 Optimize a model with 481 rows, 97 columns and 962 nonzeros Presolve removed 168 rows and 0 columns Presolve time: 0.00s Presolved: 313 rows, 97 columns, 782 nonzeros Variable types: 0 continuous, 97 integer (97 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.476364e+01, 208 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 34.76364 0 94 28.00000 34.76364 24.2% - 0s 0 0 34.39179 0 95 28.00000 34.39179 22.8% - 0s H 0 0 29.0000000 34.39179 18.6% - 0s 0 0 34.00000 0 91 29.00000 34.00000 17.2% - 0s 0 0 34.00000 0 94 29.00000 34.00000 17.2% - 0s H 0 0 30.0000000 34.00000 13.3% - 0s 0 0 33.83667 0 92 30.00000 33.83667 12.8% - 0s 0 0 33.69466 0 94 30.00000 33.69466 12.3% - 0s 0 0 33.63993 0 94 30.00000 33.63993 12.1% - 0s 0 0 33.53441 0 90 30.00000 33.53441 11.8% - 0s 0 0 33.50000 0 91 30.00000 33.50000 11.7% - 0s 0 0 33.47820 0 94 30.00000 33.47820 11.6% - 0s 0 0 33.45455 0 93 30.00000 33.45455 11.5% - 0s 0 0 33.41561 0 93 30.00000 33.41561 11.4% - 0s 0 0 33.40878 0 94 30.00000 33.40878 11.4% - 0s 0 0 33.40878 0 93 30.00000 33.40878 11.4% - 0s 0 2 33.40604 0 93 30.00000 33.40604 11.4% - 0s Cutting planes: Zero half: 42 Explored 90 nodes (3306 simplex iterations) in 0.19 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%