Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:15 2012 Optimize a model with 476 rows, 99 columns and 952 nonzeros Presolve removed 155 rows and 0 columns Presolve time: 0.00s Presolved: 321 rows, 99 columns, 768 nonzeros Variable types: 0 continuous, 99 integer (99 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.672327e+01, 198 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 36.72327 0 95 26.00000 36.72327 41.2% - 0s H 0 0 27.0000000 36.72327 36.0% - 0s H 0 0 28.0000000 36.72327 31.2% - 0s 0 0 35.78947 0 96 28.00000 35.78947 27.8% - 0s 0 0 35.54398 0 98 28.00000 35.54398 26.9% - 0s 0 0 35.16858 0 96 28.00000 35.16858 25.6% - 0s 0 0 34.91326 0 96 28.00000 34.91326 24.7% - 0s 0 0 34.58169 0 96 28.00000 34.58169 23.5% - 0s 0 0 34.27581 0 97 28.00000 34.27581 22.4% - 0s 0 0 34.17176 0 96 28.00000 34.17176 22.0% - 0s 0 0 34.11467 0 98 28.00000 34.11467 21.8% - 0s 0 0 34.06459 0 98 28.00000 34.06459 21.7% - 0s H 0 0 29.0000000 34.06459 17.5% - 0s 0 0 34.05741 0 97 29.00000 34.05741 17.4% - 0s 0 0 34.00930 0 95 29.00000 34.00930 17.3% - 0s 0 0 34.00306 0 97 29.00000 34.00306 17.3% - 0s 0 0 34.00306 0 97 29.00000 34.00306 17.3% - 0s 0 2 33.99821 0 97 29.00000 33.99821 17.2% - 0s H 54 15 30.0000000 33.68289 12.3% 31.9 0s Cutting planes: Zero half: 72 Explored 214 nodes (6124 simplex iterations) in 0.25 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%