Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:30 2012 Optimize a model with 529 rows, 103 columns and 1058 nonzeros Presolve removed 180 rows and 0 columns Presolve time: 0.00s Presolved: 349 rows, 103 columns, 843 nonzeros Variable types: 0 continuous, 103 integer (103 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 3.736923e+01, 209 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37.36923 0 100 28.00000 37.36923 33.5% - 0s H 0 0 29.0000000 37.36923 28.9% - 0s 0 0 36.84482 0 102 29.00000 36.84482 27.1% - 0s H 0 0 30.0000000 36.84482 22.8% - 0s 0 0 36.68886 0 101 30.00000 36.68886 22.3% - 0s 0 0 36.30986 0 103 30.00000 36.30986 21.0% - 0s 0 0 36.24563 0 102 30.00000 36.24563 20.8% - 0s H 0 0 31.0000000 36.24563 16.9% - 0s 0 0 36.17069 0 102 31.00000 36.17069 16.7% - 0s 0 0 36.14247 0 102 31.00000 36.14247 16.6% - 0s 0 0 36.07784 0 103 31.00000 36.07784 16.4% - 0s 0 0 35.95505 0 102 31.00000 35.95505 16.0% - 0s 0 0 35.84000 0 103 31.00000 35.84000 15.6% - 0s 0 0 35.77984 0 103 31.00000 35.77984 15.4% - 0s 0 0 35.68325 0 103 31.00000 35.68325 15.1% - 0s 0 0 35.65973 0 103 31.00000 35.65973 15.0% - 0s 0 0 35.65822 0 103 31.00000 35.65822 15.0% - 0s 0 0 35.65822 0 102 31.00000 35.65822 15.0% - 0s 0 2 35.65371 0 102 31.00000 35.65371 15.0% - 0s H 27 10 32.0000000 35.05862 9.56% 34.3 0s Cutting planes: Zero half: 50 Explored 99 nodes (3719 simplex iterations) in 0.21 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%