Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:10:09 2012 Optimize a model with 857 rows, 131 columns and 1714 nonzeros Presolve removed 328 rows and 0 columns Presolve time: 0.01s Presolved: 529 rows, 131 columns, 1366 nonzeros Variable types: 0 continuous, 131 integer (131 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 4.350417e+01, 339 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43.50417 0 129 26.00000 43.50417 67.3% - 0s H 0 0 30.0000000 43.50417 45.0% - 0s 0 0 43.03455 0 128 30.00000 43.03455 43.4% - 0s 0 0 42.76664 0 127 30.00000 42.76664 42.6% - 0s H 0 0 31.0000000 42.76664 38.0% - 0s 0 0 42.50947 0 130 31.00000 42.50947 37.1% - 0s H 0 0 32.0000000 42.50947 32.8% - 0s 0 0 42.36691 0 130 32.00000 42.36691 32.4% - 0s 0 0 42.33983 0 129 32.00000 42.33983 32.3% - 0s 0 0 42.27095 0 127 32.00000 42.27095 32.1% - 0s H 0 0 33.0000000 42.27095 28.1% - 0s 0 0 42.20067 0 129 33.00000 42.20067 27.9% - 0s 0 0 42.16999 0 129 33.00000 42.16999 27.8% - 0s 0 0 42.13673 0 129 33.00000 42.13673 27.7% - 0s H 0 0 34.0000000 42.13673 23.9% - 0s 0 0 42.12650 0 129 34.00000 42.12650 23.9% - 0s 0 0 42.12650 0 129 34.00000 42.12650 23.9% - 0s 0 2 42.12589 0 128 34.00000 42.12589 23.9% - 0s * 134 48 21 35.0000000 40.85171 16.7% 47.5 0s * 136 39 20 36.0000000 40.85171 13.5% 46.8 0s Cutting planes: Clique: 3 Zero half: 43 Explored 767 nodes (30022 simplex iterations) in 1.25 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.600000000000e+01, best bound 3.600000000000e+01, gap 0.0%