Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:51:22 2012 Optimize a model with 624 rows, 113 columns and 1248 nonzeros Presolve removed 207 rows and 0 columns Presolve time: 0.00s Presolved: 417 rows, 113 columns, 1004 nonzeros Variable types: 0 continuous, 113 integer (113 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 4.055814e+01, 237 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.55814 0 108 28.00000 40.55814 44.9% - 0s 0 0 39.61873 0 106 28.00000 39.61873 41.5% - 0s 0 0 39.19319 0 110 28.00000 39.19319 40.0% - 0s H 0 0 30.0000000 39.19319 30.6% - 0s 0 0 38.88529 0 108 30.00000 38.88529 29.6% - 0s 0 0 38.74069 0 110 30.00000 38.74069 29.1% - 0s 0 0 38.56257 0 105 30.00000 38.56257 28.5% - 0s 0 0 38.33395 0 104 30.00000 38.33395 27.8% - 0s 0 0 38.16540 0 105 30.00000 38.16540 27.2% - 0s H 0 0 31.0000000 38.16540 23.1% - 0s 0 0 38.14059 0 105 31.00000 38.14059 23.0% - 0s 0 0 38.11164 0 108 31.00000 38.11164 22.9% - 0s 0 0 38.07986 0 108 31.00000 38.07986 22.8% - 0s 0 0 38.06410 0 106 31.00000 38.06410 22.8% - 0s 0 0 38.01250 0 108 31.00000 38.01250 22.6% - 0s 0 0 37.97856 0 107 31.00000 37.97856 22.5% - 0s 0 0 37.89076 0 108 31.00000 37.89076 22.2% - 0s 0 0 37.85320 0 110 31.00000 37.85320 22.1% - 0s 0 0 37.82515 0 108 31.00000 37.82515 22.0% - 0s 0 0 37.80769 0 109 31.00000 37.80769 22.0% - 0s 0 0 37.80769 0 109 31.00000 37.80769 22.0% - 0s 0 2 37.80591 0 109 31.00000 37.80591 22.0% - 0s H 22 9 33.0000000 37.80346 14.6% 23.6 0s Cutting planes: Zero half: 94 Explored 424 nodes (13632 simplex iterations) in 0.58 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%