Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:13 2012 Optimize a model with 475 rows, 98 columns and 950 nonzeros Presolve removed 147 rows and 0 columns Presolve time: 0.00s Presolved: 328 rows, 98 columns, 773 nonzeros Variable types: 0 continuous, 98 integer (98 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 3.575000e+01, 200 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35.75000 0 83 24.00000 35.75000 49.0% - 0s H 0 0 29.0000000 35.75000 23.3% - 0s 0 0 35.00000 0 93 29.00000 35.00000 20.7% - 0s 0 0 35.00000 0 95 29.00000 35.00000 20.7% - 0s 0 0 34.73077 0 95 29.00000 34.73077 19.8% - 0s H 0 0 30.0000000 34.73077 15.8% - 0s 0 0 34.56538 0 96 30.00000 34.56538 15.2% - 0s H 0 0 31.0000000 34.56538 11.5% - 0s 0 0 34.34810 0 94 31.00000 34.34810 10.8% - 0s 0 0 34.23985 0 96 31.00000 34.23985 10.5% - 0s 0 0 34.08186 0 97 31.00000 34.08186 9.94% - 0s 0 0 34.02765 0 95 31.00000 34.02765 9.77% - 0s 0 0 33.98228 0 96 31.00000 33.98228 9.62% - 0s 0 0 33.97425 0 94 31.00000 33.97425 9.59% - 0s 0 0 33.96373 0 95 31.00000 33.96373 9.56% - 0s 0 0 33.96373 0 95 31.00000 33.96373 9.56% - 0s 0 2 33.94304 0 95 31.00000 33.94304 9.49% - 0s Cutting planes: Clique: 1 Zero half: 41 Explored 46 nodes (2327 simplex iterations) in 0.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%