Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:51 2012 Optimize a model with 563 rows, 106 columns and 1126 nonzeros Presolve removed 191 rows and 0 columns Presolve time: 0.00s Presolved: 372 rows, 106 columns, 916 nonzeros Variable types: 0 continuous, 106 integer (106 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 3.874074e+01, 233 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38.74074 0 105 29.00000 38.74074 33.6% - 0s 0 0 37.69391 0 106 29.00000 37.69391 30.0% - 0s 0 0 37.47112 0 105 29.00000 37.47112 29.2% - 0s 0 0 37.32385 0 105 29.00000 37.32385 28.7% - 0s H 0 0 30.0000000 37.32385 24.4% - 0s 0 0 37.21646 0 105 30.00000 37.21646 24.1% - 0s 0 0 37.15064 0 105 30.00000 37.15064 23.8% - 0s 0 0 37.04650 0 105 30.00000 37.04650 23.5% - 0s 0 0 36.96140 0 105 30.00000 36.96140 23.2% - 0s 0 0 36.88406 0 106 30.00000 36.88406 22.9% - 0s 0 0 36.81766 0 106 30.00000 36.81766 22.7% - 0s 0 0 36.72432 0 105 30.00000 36.72432 22.4% - 0s 0 0 36.64598 0 105 30.00000 36.64598 22.2% - 0s 0 0 36.62064 0 105 30.00000 36.62064 22.1% - 0s 0 0 36.56914 0 105 30.00000 36.56914 21.9% - 0s 0 0 36.40028 0 103 30.00000 36.40028 21.3% - 0s 0 0 36.33801 0 102 30.00000 36.33801 21.1% - 0s 0 0 36.33547 0 103 30.00000 36.33547 21.1% - 0s 0 0 36.33547 0 103 30.00000 36.33547 21.1% - 0s H 0 0 31.0000000 36.33547 17.2% - 0s 0 2 36.33113 0 103 31.00000 36.33113 17.2% - 0s * 42 16 7 32.0000000 36.09839 12.8% 35.6 0s Cutting planes: Clique: 3 Zero half: 64 Explored 205 nodes (7791 simplex iterations) in 0.37 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%