Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:01 2012 Optimize a model with 428 rows, 92 columns and 856 nonzeros Presolve removed 135 rows and 0 columns Presolve time: 0.00s Presolved: 293 rows, 92 columns, 693 nonzeros Variable types: 0 continuous, 92 integer (92 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.433333e+01, 176 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 34.33333 0 81 26.00000 34.33333 32.1% - 0s 0 0 34.00000 0 87 26.00000 34.00000 30.8% - 0s 0 0 33.51515 0 90 26.00000 33.51515 28.9% - 0s H 0 0 27.0000000 33.51515 24.1% - 0s H 0 0 28.0000000 33.51515 19.7% - 0s 0 0 33.14384 0 90 28.00000 33.14384 18.4% - 0s 0 0 33.03982 0 91 28.00000 33.03982 18.0% - 0s 0 0 32.75699 0 90 28.00000 32.75699 17.0% - 0s 0 0 32.68826 0 91 28.00000 32.68826 16.7% - 0s 0 0 32.67175 0 91 28.00000 32.67175 16.7% - 0s 0 0 32.64743 0 90 28.00000 32.64743 16.6% - 0s 0 0 32.60754 0 90 28.00000 32.60754 16.5% - 0s 0 0 32.57495 0 90 28.00000 32.57495 16.3% - 0s H 0 0 29.0000000 32.57495 12.3% - 0s 0 0 32.56768 0 90 29.00000 32.56768 12.3% - 0s 0 0 32.56768 0 89 29.00000 32.56768 12.3% - 0s 0 2 32.56590 0 89 29.00000 32.56590 12.3% - 0s Cutting planes: Zero half: 72 Explored 82 nodes (2795 simplex iterations) in 0.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0%