Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:04 2012 Optimize a model with 434 rows, 93 columns and 868 nonzeros Presolve removed 143 rows and 0 columns Presolve time: 0.00s Presolved: 291 rows, 93 columns, 696 nonzeros Variable types: 0 continuous, 93 integer (93 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.508235e+01, 193 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35.08235 0 92 26.00000 35.08235 34.9% - 0s 0 0 34.52649 0 92 26.00000 34.52649 32.8% - 0s H 0 0 28.0000000 34.52649 23.3% - 0s 0 0 34.10409 0 92 28.00000 34.10409 21.8% - 0s 0 0 33.96512 0 87 28.00000 33.96512 21.3% - 0s H 0 0 29.0000000 33.96512 17.1% - 0s 0 0 33.85921 0 91 29.00000 33.85921 16.8% - 0s 0 0 33.70265 0 92 29.00000 33.70265 16.2% - 0s 0 0 33.62533 0 93 29.00000 33.62533 15.9% - 0s 0 0 33.50930 0 93 29.00000 33.50930 15.5% - 0s 0 0 33.40488 0 93 29.00000 33.40488 15.2% - 0s 0 0 33.31146 0 91 29.00000 33.31146 14.9% - 0s 0 0 33.28380 0 93 29.00000 33.28380 14.8% - 0s 0 0 33.25402 0 93 29.00000 33.25402 14.7% - 0s 0 0 33.22872 0 93 29.00000 33.22872 14.6% - 0s 0 0 33.18564 0 93 29.00000 33.18564 14.4% - 0s 0 0 33.17050 0 93 29.00000 33.17050 14.4% - 0s 0 0 33.17050 0 93 29.00000 33.17050 14.4% - 0s 0 2 33.16475 0 93 29.00000 33.16475 14.4% - 0s H 7 7 30.0000000 33.06677 10.2% 47.6 0s * 11 5 5 31.0000000 33.06677 6.67% 38.7 0s Cutting planes: Clique: 1 Zero half: 45 Explored 27 nodes (1672 simplex iterations) in 0.14 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%