Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:29 2012 Optimize a model with 539 rows, 103 columns and 1078 nonzeros Presolve removed 182 rows and 0 columns Presolve time: 0.00s Presolved: 357 rows, 103 columns, 861 nonzeros Variable types: 0 continuous, 103 integer (103 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.701404e+01, 244 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37.01404 0 100 26.00000 37.01404 42.4% - 0s H 0 0 27.0000000 37.01404 37.1% - 0s 0 0 36.41341 0 100 27.00000 36.41341 34.9% - 0s 0 0 36.24145 0 99 27.00000 36.24145 34.2% - 0s H 0 0 28.0000000 36.24145 29.4% - 0s 0 0 36.03138 0 99 28.00000 36.03138 28.7% - 0s 0 0 35.91470 0 99 28.00000 35.91470 28.3% - 0s H 0 0 29.0000000 35.91470 23.8% - 0s 0 0 35.81179 0 100 29.00000 35.81179 23.5% - 0s 0 0 35.65839 0 101 29.00000 35.65839 23.0% - 0s H 0 0 30.0000000 35.65839 18.9% - 0s 0 0 35.58473 0 99 30.00000 35.58473 18.6% - 0s 0 0 35.48942 0 100 30.00000 35.48942 18.3% - 0s 0 0 35.37507 0 100 30.00000 35.37507 17.9% - 0s 0 0 35.34754 0 99 30.00000 35.34754 17.8% - 0s 0 0 35.23031 0 101 30.00000 35.23031 17.4% - 0s 0 0 35.19770 0 99 30.00000 35.19770 17.3% - 0s 0 0 35.19417 0 99 30.00000 35.19417 17.3% - 0s 0 0 35.19417 0 99 30.00000 35.19417 17.3% - 0s 0 2 35.18577 0 99 30.00000 35.18577 17.3% - 0s * 32 13 6 32.0000000 34.29167 7.16% 37.6 0s Cutting planes: Clique: 1 Zero half: 40 Explored 68 nodes (2900 simplex iterations) in 0.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%