Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:52:12 2012 Optimize a model with 684 rows, 116 columns and 1368 nonzeros Presolve removed 273 rows and 0 columns Presolve time: 0.00s Presolved: 411 rows, 116 columns, 1051 nonzeros Variable types: 0 continuous, 116 integer (116 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 3.919967e+01, 308 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 39.19967 0 108 29.00000 39.19967 35.2% - 0s H 0 0 31.0000000 39.19967 26.5% - 0s 0 0 38.81990 0 112 31.00000 38.81990 25.2% - 0s H 0 0 32.0000000 38.81990 21.3% - 0s 0 0 38.56507 0 114 32.00000 38.56507 20.5% - 0s 0 0 38.46878 0 114 32.00000 38.46878 20.2% - 0s 0 0 38.36389 0 114 32.00000 38.36389 19.9% - 0s 0 0 38.27316 0 113 32.00000 38.27316 19.6% - 0s 0 0 38.09381 0 115 32.00000 38.09381 19.0% - 0s 0 0 37.97932 0 112 32.00000 37.97932 18.7% - 0s 0 0 37.83515 0 114 32.00000 37.83515 18.2% - 0s 0 0 37.74228 0 113 32.00000 37.74228 17.9% - 0s 0 0 37.70906 0 113 32.00000 37.70906 17.8% - 0s 0 0 37.66950 0 113 32.00000 37.66950 17.7% - 0s 0 0 37.65710 0 114 32.00000 37.65710 17.7% - 0s 0 0 37.65710 0 114 32.00000 37.65710 17.7% - 0s 0 2 37.64927 0 114 32.00000 37.64927 17.7% - 0s * 98 28 11 33.0000000 36.62500 11.0% 40.9 0s Cutting planes: Clique: 3 Zero half: 55 Explored 307 nodes (11790 simplex iterations) in 0.52 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0%