Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:12:53 2012 Optimize a model with 795 rows, 174 columns and 1590 nonzeros Presolve removed 192 rows and 0 columns Presolve time: 0.00s Presolved: 603 rows, 174 columns, 1334 nonzeros Variable types: 0 continuous, 174 integer (174 binary) Found heuristic solution: objective 49.0000000 Root relaxation: objective 6.810000e+01, 360 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 68.10000 0 160 49.00000 68.10000 39.0% - 0s 0 0 66.63975 0 173 49.00000 66.63975 36.0% - 0s H 0 0 50.0000000 66.63975 33.3% - 0s 0 0 66.26999 0 171 50.00000 66.26999 32.5% - 0s 0 0 65.77123 0 172 50.00000 65.77123 31.5% - 0s 0 0 65.47214 0 173 50.00000 65.47214 30.9% - 0s H 0 0 52.0000000 65.47214 25.9% - 0s 0 0 65.32102 0 172 52.00000 65.32102 25.6% - 0s 0 0 65.16539 0 172 52.00000 65.16539 25.3% - 0s 0 0 64.92048 0 172 52.00000 64.92048 24.8% - 0s 0 0 64.76884 0 173 52.00000 64.76884 24.6% - 0s 0 0 64.66618 0 171 52.00000 64.66618 24.4% - 0s 0 0 64.58669 0 171 52.00000 64.58669 24.2% - 0s 0 0 64.54052 0 171 52.00000 64.54052 24.1% - 0s 0 0 64.52061 0 173 52.00000 64.52061 24.1% - 0s 0 0 64.52061 0 171 52.00000 64.52061 24.1% - 0s H 0 0 53.0000000 64.52061 21.7% - 0s 0 2 64.52044 0 171 53.00000 64.52044 21.7% - 0s H 48 26 54.0000000 64.30225 19.1% 48.1 0s H 55 21 56.0000000 64.19004 14.6% 45.9 0s 722 293 57.16667 38 118 56.00000 61.92591 10.6% 51.2 5s 3360 848 57.87234 27 127 56.00000 59.74684 6.69% 36.7 10s * 6344 307 34 57.0000000 58.35714 2.38% 32.0 14s Cutting planes: Gomory: 9 Zero half: 67 Explored 6665 nodes (206986 simplex iterations) in 14.49 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0%