Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:07 2012 Optimize a model with 458 rows, 95 columns and 916 nonzeros Presolve removed 159 rows and 0 columns Presolve time: 0.00s Presolved: 299 rows, 95 columns, 738 nonzeros Variable types: 0 continuous, 95 integer (95 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 3.407246e+01, 231 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 34.07246 0 92 25.00000 34.07246 36.3% - 0s 0 0 33.50000 0 87 25.00000 33.50000 34.0% - 0s H 0 0 26.0000000 33.50000 28.8% - 0s 0 0 33.32723 0 94 26.00000 33.32723 28.2% - 0s 0 0 33.17544 0 94 26.00000 33.17544 27.6% - 0s H 0 0 27.0000000 33.17544 22.9% - 0s H 0 0 28.0000000 33.17544 18.5% - 0s 0 0 33.06977 0 90 28.00000 33.06977 18.1% - 0s H 0 0 29.0000000 33.06977 14.0% - 0s 0 0 33.00360 0 94 29.00000 33.00360 13.8% - 0s 0 0 32.93649 0 93 29.00000 32.93649 13.6% - 0s 0 0 32.85440 0 94 29.00000 32.85440 13.3% - 0s 0 0 32.79777 0 95 29.00000 32.79777 13.1% - 0s 0 0 32.74499 0 95 29.00000 32.74499 12.9% - 0s 0 0 32.70537 0 93 29.00000 32.70537 12.8% - 0s H 0 0 30.0000000 32.70537 9.02% - 0s 0 0 32.69326 0 94 30.00000 32.69326 8.98% - 0s 0 0 32.69326 0 93 30.00000 32.69326 8.98% - 0s 0 2 32.69167 0 93 30.00000 32.69167 8.97% - 0s Cutting planes: Zero half: 53 Explored 30 nodes (1737 simplex iterations) in 0.12 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%