Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:50:37 2012 Optimize a model with 668 rows, 110 columns and 1336 nonzeros Presolve removed 259 rows and 0 columns Presolve time: 0.00s Presolved: 409 rows, 110 columns, 1069 nonzeros Variable types: 0 continuous, 110 integer (110 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.704483e+01, 293 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37.04483 0 106 26.00000 37.04483 42.5% - 0s 0 0 36.60699 0 106 26.00000 36.60699 40.8% - 0s 0 0 36.44978 0 102 26.00000 36.44978 40.2% - 0s H 0 0 27.0000000 36.44978 35.0% - 0s 0 0 36.25727 0 106 27.00000 36.25727 34.3% - 0s H 0 0 29.0000000 36.25727 25.0% - 0s 0 0 36.12070 0 107 29.00000 36.12070 24.6% - 0s 0 0 35.89725 0 110 29.00000 35.89725 23.8% - 0s 0 0 35.86062 0 110 29.00000 35.86062 23.7% - 0s 0 0 35.83331 0 109 29.00000 35.83331 23.6% - 0s 0 0 35.77808 0 109 29.00000 35.77808 23.4% - 0s 0 0 35.75703 0 109 29.00000 35.75703 23.3% - 0s 0 0 35.70984 0 108 29.00000 35.70984 23.1% - 0s 0 0 35.65743 0 108 29.00000 35.65743 23.0% - 0s 0 0 35.58173 0 108 29.00000 35.58173 22.7% - 0s 0 0 35.57163 0 109 29.00000 35.57163 22.7% - 0s 0 0 35.57163 0 109 29.00000 35.57163 22.7% - 0s 0 2 35.56873 0 109 29.00000 35.56873 22.7% - 0s * 26 13 11 30.0000000 35.34573 17.8% 41.2 0s Cutting planes: Gomory: 3 Clique: 2 Zero half: 52 Explored 533 nodes (16850 simplex iterations) in 0.66 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+01, best bound 3.000000000000e+01, gap 0.0%