Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:13 2012 Optimize a model with 320 rows, 108 columns and 640 nonzeros Presolve removed 76 rows and 10 columns Presolve time: 0.00s Presolved: 244 rows, 98 columns, 512 nonzeros Variable types: 0 continuous, 98 integer (98 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 4.800000e+01, 136 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 48.00000 0 90 41.00000 48.00000 17.1% - 0s H 0 0 43.0000000 48.00000 11.6% - 0s 0 0 46.50000 0 96 43.00000 46.50000 8.14% - 0s 0 0 46.00000 0 92 43.00000 46.00000 6.98% - 0s 0 0 45.94444 0 95 43.00000 45.94444 6.85% - 0s 0 0 45.68966 0 95 43.00000 45.68966 6.26% - 0s 0 0 45.61644 0 92 43.00000 45.61644 6.08% - 0s 0 0 45.53255 0 96 43.00000 45.53255 5.89% - 0s 0 0 45.31579 0 95 43.00000 45.31579 5.39% - 0s 0 0 45.25000 0 78 43.00000 45.25000 5.23% - 0s 0 0 45.17391 0 94 43.00000 45.17391 5.06% - 0s 0 0 45.09091 0 97 43.00000 45.09091 4.86% - 0s 0 0 45.04211 0 95 43.00000 45.04211 4.75% - 0s 0 0 44.94118 0 92 43.00000 44.94118 4.51% - 0s 0 0 44.93590 0 94 43.00000 44.93590 4.50% - 0s 0 0 44.93590 0 92 43.00000 44.93590 4.50% - 0s H 0 0 44.0000000 44.93590 2.13% - 0s Cutting planes: Gomory: 1 Zero half: 32 Explored 0 nodes (722 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.400000000000e+01, best bound 4.400000000000e+01, gap 0.0%