Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:18 2012 Optimize a model with 518 rows, 100 columns and 1036 nonzeros Presolve removed 192 rows and 0 columns Presolve time: 0.00s Presolved: 326 rows, 100 columns, 802 nonzeros Variable types: 0 continuous, 100 integer (100 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 3.489933e+01, 238 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 34.89933 0 96 24.00000 34.89933 45.4% - 0s H 0 0 25.0000000 34.89933 39.6% - 0s H 0 0 26.0000000 34.89933 34.2% - 0s 0 0 34.34524 0 96 26.00000 34.34524 32.1% - 0s 0 0 33.85462 0 97 26.00000 33.85462 30.2% - 0s 0 0 33.72399 0 97 26.00000 33.72399 29.7% - 0s H 0 0 27.0000000 33.72399 24.9% - 0s 0 0 33.65510 0 99 27.00000 33.65510 24.6% - 0s H 0 0 29.0000000 33.65510 16.1% - 0s 0 0 33.61958 0 98 29.00000 33.61958 15.9% - 0s 0 0 33.56422 0 99 29.00000 33.56422 15.7% - 0s 0 0 33.49608 0 97 29.00000 33.49608 15.5% - 0s 0 0 33.42771 0 100 29.00000 33.42771 15.3% - 0s 0 0 33.32758 0 97 29.00000 33.32758 14.9% - 0s 0 0 33.29113 0 97 29.00000 33.29113 14.8% - 0s 0 0 33.23791 0 97 29.00000 33.23791 14.6% - 0s 0 0 33.22123 0 96 29.00000 33.22123 14.6% - 0s 0 0 33.20713 0 98 29.00000 33.20713 14.5% - 0s 0 0 33.20713 0 98 29.00000 33.20713 14.5% - 0s 0 2 33.20565 0 97 29.00000 33.20565 14.5% - 0s * 38 12 4 30.0000000 32.52522 8.42% 35.2 0s Cutting planes: Clique: 1 Zero half: 48 Explored 92 nodes (3570 simplex iterations) in 0.20 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%