Gurobi 5.0.1 (linux64) logging started Tue Nov 20 15:24:49 2012 Optimize a model with 968 rows, 195 columns and 1936 nonzeros Presolve removed 244 rows and 0 columns Presolve time: 0.01s Presolved: 724 rows, 195 columns, 1616 nonzeros Variable types: 0 continuous, 195 integer (195 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 7.517081e+01, 483 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 75.17081 0 191 54.00000 75.17081 39.2% - 0s H 0 0 55.0000000 75.17081 36.7% - 0s 0 0 73.71919 0 190 55.00000 73.71919 34.0% - 0s 0 0 72.96021 0 192 55.00000 72.96021 32.7% - 0s 0 0 72.51876 0 193 55.00000 72.51876 31.9% - 0s 0 0 72.05013 0 190 55.00000 72.05013 31.0% - 0s 0 0 71.57907 0 191 55.00000 71.57907 30.1% - 0s H 0 0 56.0000000 71.57907 27.8% - 0s H 0 0 58.0000000 71.57907 23.4% - 0s 0 0 71.41220 0 188 58.00000 71.41220 23.1% - 0s 0 0 71.33239 0 190 58.00000 71.33239 23.0% - 0s 0 0 71.27066 0 194 58.00000 71.27066 22.9% - 0s 0 0 71.17737 0 193 58.00000 71.17737 22.7% - 0s 0 0 71.10776 0 191 58.00000 71.10776 22.6% - 0s 0 0 71.02305 0 195 58.00000 71.02305 22.5% - 0s 0 0 70.96958 0 195 58.00000 70.96958 22.4% - 0s 0 0 70.88777 0 194 58.00000 70.88777 22.2% - 0s 0 0 70.79459 0 195 58.00000 70.79459 22.1% - 0s 0 0 70.64514 0 193 58.00000 70.64514 21.8% - 0s 0 0 70.59279 0 193 58.00000 70.59279 21.7% - 0s 0 0 70.50336 0 194 58.00000 70.50336 21.6% - 0s 0 0 70.42939 0 194 58.00000 70.42939 21.4% - 0s H 0 0 60.0000000 70.42939 17.4% - 0s 0 0 70.40100 0 194 60.00000 70.40100 17.3% - 0s 0 0 70.40100 0 194 60.00000 70.40100 17.3% - 0s 0 2 70.40095 0 194 60.00000 70.40095 17.3% - 0s H 27 19 61.0000000 70.13310 15.0% 104 0s H 383 154 62.0000000 68.21572 10.0% 65.7 1s 608 234 64.73979 10 193 62.00000 67.61663 9.06% 62.5 5s 1980 656 64.30478 22 156 62.00000 66.67742 7.54% 59.1 10s 3356 876 64.43590 29 148 62.00000 65.59644 5.80% 52.0 15s 5671 650 63.62500 23 139 62.00000 64.31429 3.73% 46.4 20s Cutting planes: Gomory: 6 Zero half: 76 Mod-K: 1 Explored 6934 nodes (301367 simplex iterations) in 21.79 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.200000000000e+01, best bound 6.200000000000e+01, gap 0.0%