Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:54:13 2012 Optimize a model with 732 rows, 166 columns and 1464 nonzeros Presolve removed 171 rows and 0 columns Presolve time: 0.00s Presolved: 561 rows, 166 columns, 1228 nonzeros Variable types: 0 continuous, 166 integer (166 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 6.600000e+01, 297 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 66.00000 0 132 46.00000 66.00000 43.5% - 0s H 0 0 47.0000000 66.00000 40.4% - 0s 0 0 64.73211 0 163 47.00000 64.73211 37.7% - 0s 0 0 64.06291 0 162 47.00000 64.06291 36.3% - 0s H 0 0 50.0000000 64.06291 28.1% - 0s 0 0 63.24682 0 161 50.00000 63.24682 26.5% - 0s H 0 0 52.0000000 63.24682 21.6% - 0s 0 0 62.77997 0 162 52.00000 62.77997 20.7% - 0s 0 0 62.50188 0 165 52.00000 62.50188 20.2% - 0s 0 0 62.36377 0 166 52.00000 62.36377 19.9% - 0s 0 0 62.33668 0 164 52.00000 62.33668 19.9% - 0s 0 0 62.22105 0 165 52.00000 62.22105 19.7% - 0s 0 0 62.14564 0 166 52.00000 62.14564 19.5% - 0s 0 0 62.10465 0 166 52.00000 62.10465 19.4% - 0s 0 0 62.04646 0 166 52.00000 62.04646 19.3% - 0s 0 0 62.00685 0 165 52.00000 62.00685 19.2% - 0s 0 0 61.87179 0 163 52.00000 61.87179 19.0% - 0s 0 0 61.85682 0 164 52.00000 61.85682 19.0% - 0s 0 0 61.85682 0 164 52.00000 61.85682 19.0% - 0s 0 2 61.85468 0 163 52.00000 61.85468 19.0% - 0s * 519 218 12 53.0000000 59.57371 12.4% 45.8 1s 623 251 54.40000 20 166 53.00000 59.34084 12.0% 44.9 5s H 1353 341 54.0000000 58.84675 8.98% 45.6 7s 3063 548 56.26316 22 127 54.00000 57.00000 5.56% 37.8 10s Cutting planes: Gomory: 6 Zero half: 69 Explored 4447 nodes (152180 simplex iterations) in 11.82 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.400000000000e+01, best bound 5.400000000000e+01, gap 0.0%