Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:35 2012 Optimize a model with 589 rows, 104 columns and 1178 nonzeros Presolve removed 230 rows and 0 columns Presolve time: 0.00s Presolved: 359 rows, 104 columns, 932 nonzeros Variable types: 0 continuous, 104 integer (104 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 3.634827e+01, 213 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 36.34827 0 100 29.00000 36.34827 25.3% - 0s H 0 0 30.0000000 36.34827 21.2% - 0s 0 0 35.95787 0 101 30.00000 35.95787 19.9% - 0s 0 0 35.69049 0 101 30.00000 35.69049 19.0% - 0s 0 0 35.17576 0 100 30.00000 35.17576 17.3% - 0s 0 0 34.76923 0 98 30.00000 34.76923 15.9% - 0s H 0 0 31.0000000 34.76923 12.2% - 0s 0 0 34.69154 0 99 31.00000 34.69154 11.9% - 0s 0 0 34.65359 0 101 31.00000 34.65359 11.8% - 0s 0 0 34.63293 0 102 31.00000 34.63293 11.7% - 0s 0 0 34.63293 0 101 31.00000 34.63293 11.7% - 0s 0 0 34.60837 0 102 31.00000 34.60837 11.6% - 0s 0 0 34.56104 0 101 31.00000 34.56104 11.5% - 0s 0 0 34.53112 0 102 31.00000 34.53112 11.4% - 0s 0 0 34.46866 0 101 31.00000 34.46866 11.2% - 0s 0 0 34.44952 0 101 31.00000 34.44952 11.1% - 0s 0 0 34.44952 0 101 31.00000 34.44952 11.1% - 0s 0 2 34.44510 0 101 31.00000 34.44510 11.1% - 0s Cutting planes: Clique: 4 Zero half: 58 Explored 70 nodes (3315 simplex iterations) in 0.21 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%