Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:20 2012 Optimize a model with 509 rows, 101 columns and 1018 nonzeros Presolve removed 186 rows and 0 columns Presolve time: 0.00s Presolved: 323 rows, 101 columns, 800 nonzeros Variable types: 0 continuous, 101 integer (101 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 3.543407e+01, 236 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35.43407 0 95 25.00000 35.43407 41.7% - 0s 0 0 34.88542 0 98 25.00000 34.88542 39.5% - 0s H 0 0 26.0000000 34.88542 34.2% - 0s 0 0 34.63218 0 97 26.00000 34.63218 33.2% - 0s 0 0 34.52042 0 100 26.00000 34.52042 32.8% - 0s 0 0 34.27206 0 97 26.00000 34.27206 31.8% - 0s 0 0 34.23186 0 99 26.00000 34.23186 31.7% - 0s 0 0 34.21889 0 98 26.00000 34.21889 31.6% - 0s 0 0 34.20343 0 99 26.00000 34.20343 31.6% - 0s 0 0 34.19687 0 98 26.00000 34.19687 31.5% - 0s 0 0 34.13807 0 99 26.00000 34.13807 31.3% - 0s 0 0 34.12165 0 100 26.00000 34.12165 31.2% - 0s 0 0 34.12165 0 100 26.00000 34.12165 31.2% - 0s 0 2 34.10475 0 100 26.00000 34.10475 31.2% - 0s * 19 12 16 27.0000000 34.10475 26.3% 25.3 0s H 27 12 28.0000000 33.87430 21.0% 29.8 0s * 124 30 8 29.0000000 32.83087 13.2% 22.4 0s Cutting planes: Zero half: 53 Explored 480 nodes (10673 simplex iterations) in 0.38 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0%