Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:30:24 2012 Optimize a model with 989 rows, 140 columns and 1978 nonzeros Presolve removed 386 rows and 0 columns Presolve time: 0.01s Presolved: 603 rows, 140 columns, 1582 nonzeros Variable types: 0 continuous, 140 integer (140 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 4.607233e+01, 386 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 46.07233 0 140 30.00000 46.07233 53.6% - 0s 0 0 45.70320 0 139 30.00000 45.70320 52.3% - 0s 0 0 45.51230 0 140 30.00000 45.51230 51.7% - 0s 0 0 45.32568 0 140 30.00000 45.32568 51.1% - 0s 0 0 45.22174 0 140 30.00000 45.22174 50.7% - 0s 0 0 45.09911 0 140 30.00000 45.09911 50.3% - 0s 0 0 44.92345 0 139 30.00000 44.92345 49.7% - 0s 0 0 44.77206 0 140 30.00000 44.77206 49.2% - 0s 0 0 44.69129 0 140 30.00000 44.69129 49.0% - 0s 0 0 44.59767 0 140 30.00000 44.59767 48.7% - 0s 0 0 44.44558 0 140 30.00000 44.44558 48.2% - 0s 0 0 44.37326 0 140 30.00000 44.37326 47.9% - 0s 0 0 44.30745 0 139 30.00000 44.30745 47.7% - 0s H 0 0 31.0000000 44.30745 42.9% - 0s 0 0 44.16510 0 140 31.00000 44.16510 42.5% - 0s 0 0 44.06527 0 140 31.00000 44.06527 42.1% - 0s 0 0 44.04767 0 139 31.00000 44.04767 42.1% - 0s 0 0 44.03723 0 140 31.00000 44.03723 42.1% - 0s 0 0 44.03723 0 140 31.00000 44.03723 42.1% - 0s 0 2 44.03496 0 140 31.00000 44.03496 42.0% - 0s H 22 20 32.0000000 44.03496 37.6% 40.2 0s H 67 35 33.0000000 43.67677 32.4% 42.5 0s H 599 247 34.0000000 41.36985 21.7% 39.3 1s 712 294 36.87500 18 140 34.00000 41.20077 21.2% 37.9 5s 2762 1017 cutoff 22 34.00000 39.33660 15.7% 38.6 10s 6767 1847 35.82530 25 87 34.00000 37.80000 11.2% 31.6 15s 11908 1578 cutoff 27 34.00000 36.56250 7.54% 28.4 20s Cutting planes: Gomory: 4 Clique: 1 Zero half: 43 Explored 15630 nodes (412897 simplex iterations) in 23.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0%