Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:49 2012 Optimize a model with 327 rows, 80 columns and 654 nonzeros Presolve removed 106 rows and 0 columns Presolve time: 0.00s Presolved: 221 rows, 80 columns, 522 nonzeros Variable types: 0 continuous, 80 integer (80 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 2.950000e+01, 154 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 29.50000 0 64 24.00000 29.50000 22.9% - 0s H 0 0 26.0000000 29.50000 13.5% - 0s 0 0 29.00000 0 76 26.00000 29.00000 11.5% - 0s 0 0 29.00000 0 76 26.00000 29.00000 11.5% - 0s 0 0 28.79412 0 76 26.00000 28.79412 10.7% - 0s 0 0 28.65517 0 77 26.00000 28.65517 10.2% - 0s 0 0 28.53415 0 77 26.00000 28.53415 9.75% - 0s 0 0 28.46448 0 75 26.00000 28.46448 9.48% - 0s 0 0 28.45161 0 75 26.00000 28.45161 9.43% - 0s 0 0 28.40746 0 78 26.00000 28.40746 9.26% - 0s 0 0 28.40333 0 79 26.00000 28.40333 9.24% - 0s 0 0 28.40333 0 78 26.00000 28.40333 9.24% - 0s 0 2 28.37637 0 78 26.00000 28.37637 9.14% - 0s Cutting planes: Zero half: 38 Explored 35 nodes (1269 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%