Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:33 2012 Optimize a model with 386 rows, 127 columns and 772 nonzeros Presolve removed 66 rows and 0 columns Presolve time: 0.00s Presolved: 320 rows, 127 columns, 676 nonzeros Variable types: 0 continuous, 127 integer (127 binary) Found heuristic solution: objective 44.0000000 Root relaxation: objective 5.550000e+01, 180 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 55.50000 0 99 44.00000 55.50000 26.1% - 0s 0 0 54.50000 0 95 44.00000 54.50000 23.9% - 0s 0 0 54.07407 0 119 44.00000 54.07407 22.9% - 0s H 0 0 45.0000000 54.07407 20.2% - 0s 0 0 52.72701 0 122 45.00000 52.72701 17.2% - 0s H 0 0 46.0000000 52.72701 14.6% - 0s 0 0 52.44186 0 123 46.00000 52.44186 14.0% - 0s 0 0 52.27143 0 124 46.00000 52.27143 13.6% - 0s 0 0 52.07263 0 124 46.00000 52.07263 13.2% - 0s H 0 0 47.0000000 52.07263 10.8% - 0s 0 0 51.96206 0 123 47.00000 51.96206 10.6% - 0s 0 0 51.85612 0 125 47.00000 51.85612 10.3% - 0s 0 0 51.83516 0 125 47.00000 51.83516 10.3% - 0s 0 0 51.83516 0 122 47.00000 51.83516 10.3% - 0s H 0 0 48.0000000 51.83516 7.99% - 0s 0 2 51.82581 0 121 48.00000 51.82581 7.97% - 0s H 6 6 49.0000000 51.82581 5.77% 37.8 0s Cutting planes: Gomory: 1 Zero half: 77 Explored 51 nodes (2643 simplex iterations) in 0.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.900000000000e+01, best bound 4.900000000000e+01, gap 0.0%