Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:31 2012 Optimize a model with 574 rows, 103 columns and 1148 nonzeros Presolve removed 220 rows and 0 columns Presolve time: 0.00s Presolved: 354 rows, 103 columns, 903 nonzeros Variable types: 0 continuous, 103 integer (103 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 3.565517e+01, 239 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35.65517 0 95 24.00000 35.65517 48.6% - 0s H 0 0 26.0000000 35.65517 37.1% - 0s H 0 0 27.0000000 35.65517 32.1% - 0s 0 0 35.00000 0 92 27.00000 35.00000 29.6% - 0s 0 0 35.00000 0 90 27.00000 35.00000 29.6% - 0s H 0 0 28.0000000 35.00000 25.0% - 0s 0 0 35.00000 0 100 28.00000 35.00000 25.0% - 0s 0 0 34.93493 0 100 28.00000 34.93493 24.8% - 0s 0 0 34.75281 0 100 28.00000 34.75281 24.1% - 0s H 0 0 29.0000000 34.75281 19.8% - 0s 0 0 34.61845 0 101 29.00000 34.61845 19.4% - 0s 0 0 34.54650 0 102 29.00000 34.54650 19.1% - 0s 0 0 34.52329 0 101 29.00000 34.52329 19.0% - 0s 0 0 34.51281 0 102 29.00000 34.51281 19.0% - 0s 0 0 34.49862 0 102 29.00000 34.49862 19.0% - 0s 0 0 34.43976 0 102 29.00000 34.43976 18.8% - 0s 0 0 34.42992 0 103 29.00000 34.42992 18.7% - 0s 0 0 34.42992 0 103 29.00000 34.42992 18.7% - 0s H 0 0 30.0000000 34.42992 14.8% - 0s 0 2 34.42842 0 103 30.00000 34.42842 14.8% - 0s * 10 6 5 31.0000000 34.42842 11.1% 41.9 0s Cutting planes: Clique: 1 Zero half: 43 Explored 58 nodes (2725 simplex iterations) in 0.19 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%