Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:53 2012 Optimize a model with 345 rows, 85 columns and 690 nonzeros Presolve removed 122 rows and 0 columns Presolve time: 0.00s Presolved: 223 rows, 85 columns, 538 nonzeros Variable types: 0 continuous, 85 integer (85 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.120755e+01, 146 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 31.20755 0 79 27.00000 31.20755 15.6% - 0s 0 0 30.93292 0 80 27.00000 30.93292 14.6% - 0s H 0 0 28.0000000 30.93292 10.5% - 0s 0 0 30.86111 0 80 28.00000 30.86111 10.2% - 0s H 0 0 29.0000000 30.86111 6.42% - 0s 0 0 30.84615 0 80 29.00000 30.84615 6.37% - 0s 0 0 30.79365 0 79 29.00000 30.79365 6.19% - 0s 0 0 30.67607 0 81 29.00000 30.67607 5.78% - 0s 0 0 30.61971 0 78 29.00000 30.61971 5.59% - 0s 0 0 30.53791 0 77 29.00000 30.53791 5.30% - 0s 0 0 30.48384 0 81 29.00000 30.48384 5.12% - 0s 0 0 30.47623 0 80 29.00000 30.47623 5.09% - 0s 0 0 30.45428 0 77 29.00000 30.45428 5.01% - 0s 0 0 30.39080 0 81 29.00000 30.39080 4.80% - 0s 0 0 30.38353 0 80 29.00000 30.38353 4.77% - 0s 0 0 30.37390 0 81 29.00000 30.37390 4.74% - 0s 0 0 30.37390 0 79 29.00000 30.37390 4.74% - 0s 0 2 30.37390 0 79 29.00000 30.37390 4.74% - 0s Cutting planes: Zero half: 21 Explored 11 nodes (733 simplex iterations) in 0.07 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%