Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:10:55 2012 Optimize a model with 769 rows, 174 columns and 1538 nonzeros Presolve removed 157 rows and 0 columns Presolve time: 0.00s Presolved: 612 rows, 174 columns, 1330 nonzeros Variable types: 0 continuous, 174 integer (174 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 7.050000e+01, 343 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 70.50000 0 139 49.00000 70.50000 43.9% - 0s 0 0 69.32051 0 171 49.00000 69.32051 41.5% - 0s 0 0 67.76923 0 171 49.00000 67.76923 38.3% - 0s H 0 0 50.0000000 67.76923 35.5% - 0s 0 0 67.49981 0 171 50.00000 67.49981 35.0% - 0s 0 0 66.94802 0 171 50.00000 66.94802 33.9% - 0s 0 0 66.73140 0 173 50.00000 66.73140 33.5% - 0s 0 0 66.56910 0 173 50.00000 66.56910 33.1% - 0s 0 0 66.47993 0 172 50.00000 66.47993 33.0% - 0s 0 0 66.35330 0 173 50.00000 66.35330 32.7% - 0s 0 0 66.12486 0 173 50.00000 66.12486 32.2% - 0s H 0 0 51.0000000 66.12486 29.7% - 0s 0 0 65.95239 0 172 51.00000 65.95239 29.3% - 0s 0 0 65.78459 0 173 51.00000 65.78459 29.0% - 0s 0 0 65.71887 0 173 51.00000 65.71887 28.9% - 0s 0 0 65.66140 0 173 51.00000 65.66140 28.7% - 0s 0 0 65.52910 0 174 51.00000 65.52910 28.5% - 0s 0 0 65.31967 0 174 51.00000 65.31967 28.1% - 0s 0 0 65.11978 0 172 51.00000 65.11978 27.7% - 0s 0 0 65.04623 0 172 51.00000 65.04623 27.5% - 0s 0 0 65.00448 0 172 51.00000 65.00448 27.5% - 0s 0 0 65.00448 0 171 51.00000 65.00448 27.5% - 0s 0 2 65.00385 0 171 51.00000 65.00385 27.5% - 0s H 62 35 53.0000000 64.75670 22.2% 54.9 0s H 66 37 54.0000000 64.75670 19.9% 52.9 0s 610 305 58.37500 13 171 54.00000 62.61106 15.9% 42.2 5s H 2328 970 55.0000000 61.44531 11.7% 37.6 9s 2910 1243 60.16325 30 139 55.00000 61.09615 11.1% 35.7 10s * 3924 1350 35 56.0000000 60.65672 8.32% 33.6 11s 6476 1719 57.28571 29 114 56.00000 59.42105 6.11% 31.3 15s 10864 230 cutoff 43 56.00000 57.25000 2.23% 28.7 20s Cutting planes: Gomory: 7 Zero half: 81 Explored 11123 nodes (316582 simplex iterations) in 20.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.600000000000e+01, best bound 5.600000000000e+01, gap 0.0%