Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:43:02 2012 Optimize a model with 841 rows, 183 columns and 1682 nonzeros Presolve removed 192 rows and 0 columns Presolve time: 0.00s Presolved: 649 rows, 183 columns, 1424 nonzeros Variable types: 0 continuous, 183 integer (183 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 7.400000e+01, 371 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 74.00000 0 142 51.00000 74.00000 45.1% - 0s 0 0 72.62604 0 178 51.00000 72.62604 42.4% - 0s H 0 0 52.0000000 72.62604 39.7% - 0s H 0 0 54.0000000 72.62604 34.5% - 0s 0 0 71.96740 0 178 54.00000 71.96740 33.3% - 0s 0 0 71.45912 0 178 54.00000 71.45912 32.3% - 0s 0 0 70.81944 0 179 54.00000 70.81944 31.1% - 0s H 0 0 55.0000000 70.81944 28.8% - 0s 0 0 70.34476 0 182 55.00000 70.34476 27.9% - 0s 0 0 70.05683 0 182 55.00000 70.05683 27.4% - 0s 0 0 69.82774 0 182 55.00000 69.82774 27.0% - 0s 0 0 69.52914 0 183 55.00000 69.52914 26.4% - 0s 0 0 69.34115 0 183 55.00000 69.34115 26.1% - 0s 0 0 69.21302 0 181 55.00000 69.21302 25.8% - 0s 0 0 69.16140 0 181 55.00000 69.16140 25.7% - 0s 0 0 69.14470 0 182 55.00000 69.14470 25.7% - 0s 0 0 69.14470 0 182 55.00000 69.14470 25.7% - 0s 0 2 69.14444 0 182 55.00000 69.14444 25.7% - 0s * 22 22 16 59.0000000 69.14444 17.2% 80.3 0s 609 291 63.00000 9 181 59.00000 66.30000 12.4% 47.2 5s H 1157 399 60.0000000 66.30000 10.5% 52.6 7s 2123 691 64.30000 32 153 60.00000 65.15748 8.60% 46.5 10s 5008 1205 61.60000 32 128 60.00000 63.55000 5.92% 39.0 15s 8305 572 61.80000 34 125 60.00000 62.05000 3.42% 35.6 20s Cutting planes: Gomory: 2 Zero half: 77 Explored 9277 nodes (318126 simplex iterations) in 20.86 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+01, best bound 6.000000000000e+01, gap 0.0%