Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:50:53 2012 Optimize a model with 622 rows, 112 columns and 1244 nonzeros Presolve removed 236 rows and 0 columns Presolve time: 0.00s Presolved: 386 rows, 112 columns, 974 nonzeros Variable types: 0 continuous, 112 integer (112 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.991045e+01, 341 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 39.91045 0 109 26.00000 39.91045 53.5% - 0s H 0 0 27.0000000 39.91045 47.8% - 0s 0 0 39.00000 0 105 27.00000 39.00000 44.4% - 0s 0 0 39.00000 0 111 27.00000 39.00000 44.4% - 0s 0 0 38.87969 0 111 27.00000 38.87969 44.0% - 0s 0 0 38.63166 0 111 27.00000 38.63166 43.1% - 0s 0 0 38.44651 0 112 27.00000 38.44651 42.4% - 0s 0 0 38.34540 0 112 27.00000 38.34540 42.0% - 0s 0 0 38.22730 0 111 27.00000 38.22730 41.6% - 0s H 0 0 29.0000000 38.22730 31.8% - 0s 0 0 38.17351 0 112 29.00000 38.17351 31.6% - 0s 0 0 38.15276 0 111 29.00000 38.15276 31.6% - 0s 0 0 38.02772 0 111 29.00000 38.02772 31.1% - 0s 0 0 37.96112 0 111 29.00000 37.96112 30.9% - 0s 0 0 37.92189 0 112 29.00000 37.92189 30.8% - 0s 0 0 37.84478 0 110 29.00000 37.84478 30.5% - 0s 0 0 37.80625 0 112 29.00000 37.80625 30.4% - 0s 0 0 37.72977 0 112 29.00000 37.72977 30.1% - 0s 0 0 37.72699 0 112 29.00000 37.72699 30.1% - 0s 0 0 37.72699 0 112 29.00000 37.72699 30.1% - 0s H 0 0 30.0000000 37.72699 25.8% - 0s 0 2 37.71899 0 112 30.00000 37.71899 25.7% - 0s H 274 81 31.0000000 35.58282 14.8% 28.4 0s 686 190 34.16585 21 88 31.00000 34.78378 12.2% 30.5 5s Cutting planes: Gomory: 6 Clique: 2 Zero half: 46 Explored 2473 nodes (57920 simplex iterations) in 6.61 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%