Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:18:24 2012 Optimize a model with 808 rows, 176 columns and 1616 nonzeros Presolve removed 197 rows and 0 columns Presolve time: 0.01s Presolved: 611 rows, 176 columns, 1360 nonzeros Variable types: 0 continuous, 176 integer (176 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 7.021229e+01, 353 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 70.21229 0 171 51.00000 70.21229 37.7% - 0s 0 0 68.33634 0 172 51.00000 68.33634 34.0% - 0s H 0 0 52.0000000 68.33634 31.4% - 0s 0 0 67.95756 0 171 52.00000 67.95756 30.7% - 0s 0 0 67.75326 0 168 52.00000 67.75326 30.3% - 0s 0 0 67.61401 0 172 52.00000 67.61401 30.0% - 0s 0 0 67.45877 0 170 52.00000 67.45877 29.7% - 0s 0 0 67.26424 0 174 52.00000 67.26424 29.4% - 0s H 0 0 53.0000000 67.26424 26.9% - 0s 0 0 67.11834 0 173 53.00000 67.11834 26.6% - 0s 0 0 66.88426 0 173 53.00000 66.88426 26.2% - 0s H 0 0 54.0000000 66.88426 23.9% - 0s 0 0 66.65410 0 174 54.00000 66.65410 23.4% - 0s 0 0 66.54118 0 174 54.00000 66.54118 23.2% - 0s 0 0 66.43175 0 173 54.00000 66.43175 23.0% - 0s 0 0 66.37566 0 174 54.00000 66.37566 22.9% - 0s 0 0 66.33630 0 173 54.00000 66.33630 22.8% - 0s 0 0 66.33048 0 174 54.00000 66.33048 22.8% - 0s 0 0 66.33048 0 173 54.00000 66.33048 22.8% - 0s 0 2 66.33046 0 173 54.00000 66.33046 22.8% - 0s H 42 34 55.0000000 66.20466 20.4% 67.5 0s * 54 32 18 56.0000000 66.20466 18.2% 55.0 0s * 267 107 10 57.0000000 64.60354 13.3% 43.3 0s H 301 117 58.0000000 64.32582 10.9% 45.3 0s 630 240 63.46806 21 162 58.00000 63.46806 9.43% 48.9 5s 3133 623 59.39419 26 129 58.00000 61.20000 5.52% 38.5 10s Cutting planes: Gomory: 1 Zero half: 70 Explored 5301 nodes (177215 simplex iterations) in 12.56 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.800000000000e+01, best bound 5.800000000000e+01, gap 0.0%