Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:12 2012 Optimize a model with 315 rows, 106 columns and 630 nonzeros Presolve removed 74 rows and 4 columns Presolve time: 0.00s Presolved: 241 rows, 102 columns, 519 nonzeros Variable types: 0 continuous, 102 integer (102 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 4.491667e+01, 161 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 44.91667 0 101 37.00000 44.91667 21.4% - 0s H 0 0 38.0000000 44.91667 18.2% - 0s 0 0 43.57143 0 99 38.00000 43.57143 14.7% - 0s H 0 0 40.0000000 43.57143 8.93% - 0s 0 0 43.39597 0 101 40.00000 43.39597 8.49% - 0s 0 0 43.35389 0 101 40.00000 43.35389 8.38% - 0s H 0 0 41.0000000 43.35389 5.74% - 0s 0 0 43.22607 0 102 41.00000 43.22607 5.43% - 0s 0 0 43.18719 0 100 41.00000 43.18719 5.33% - 0s 0 0 43.12150 0 99 41.00000 43.12150 5.17% - 0s 0 0 43.11009 0 101 41.00000 43.11009 5.15% - 0s 0 0 43.11009 0 101 41.00000 43.11009 5.15% - 0s 0 2 43.10850 0 101 41.00000 43.10850 5.14% - 0s Cutting planes: Gomory: 1 Zero half: 41 Explored 25 nodes (1100 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.100000000000e+01, best bound 4.100000000000e+01, gap 0.0%