Optimize a model with 42 rows, 861 columns and 1722 nonzeros Presolve time: 0.00s Presolved: 42 rows, 861 columns, 1722 nonzeros Iteration Objective Primal Inf. Dual Inf. Time 0 6.0000000e+00 8.100000e+01 0.000000e+00 0s 61 6.4100000e+02 0.000000e+00 0.000000e+00 0s Solved in 61 iterations and 0.00 seconds Optimal objective 6.410000000e+02 Optimize a model with 44 rows, 861 columns and 2431 nonzeros Iteration Objective Primal Inf. Dual Inf. Time 0 6.4100000e+02 2.000000e+00 0.000000e+00 0s 5 6.7600000e+02 0.000000e+00 0.000000e+00 0s Solved in 5 iterations and 0.00 seconds Optimal objective 6.760000000e+02 Optimize a model with 46 rows, 861 columns and 3047 nonzeros Iteration Objective Primal Inf. Dual Inf. Time 0 6.7600000e+02 2.000000e+00 0.000000e+00 0s 7 6.8100000e+02 0.000000e+00 0.000000e+00 0s Solved in 7 iterations and 0.00 seconds Optimal objective 6.810000000e+02 Optimize a model with 48 rows, 861 columns and 3756 nonzeros Iteration Objective Primal Inf. Dual Inf. Time 0 6.8100000e+02 2.000000e+00 0.000000e+00 0s 1 6.8250000e+02 0.000000e+00 0.000000e+00 0s Solved in 1 iterations and 0.00 seconds Optimal objective 6.825000000e+02 Optimize a model with 48 rows, 861 columns and 3756 nonzeros Presolve time: 0.00s Presolved: 48 rows, 861 columns, 3756 nonzeros Variable types: 0 continuous, 861 integer (861 binary) Found heuristic solution: objective 2536.0000000 Root relaxation: objective 6.825000e+02, 68 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 682.50000 0 6 2536.00000 682.50000 73.1% - 0s H 0 0 704.0000000 682.50000 3.05% - 0s 0 0 685.00000 0 8 704.00000 685.00000 2.70% - 0s 0 0 685.00000 0 6 704.00000 685.00000 2.70% - 0s * 0 0 0 686.0000000 686.00000 0.0% - 0s Cutting planes: Gomory: 2 Zero half: 4 Explored 0 nodes (149 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.860000000000e+02, best bound 6.860000000000e+02, gap 0.0% Optimize a model with 50 rows, 861 columns and 4276 nonzeros Presolve time: 0.00s Presolved: 50 rows, 861 columns, 4276 nonzeros MIP start did not produce a feasible solution Variable types: 0 continuous, 861 integer (861 binary) Found heuristic solution: objective 2536.0000000 Root relaxation: objective 6.880000e+02, 76 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 688.0000000 688.00000 0.0% - 0s Explored 0 nodes (76 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.880000000000e+02, best bound 6.880000000000e+02, gap 0.0% Optimize a model with 52 rows, 861 columns and 4760 nonzeros Presolve time: 0.00s Presolved: 52 rows, 861 columns, 4760 nonzeros MIP start did not produce a feasible solution Variable types: 0 continuous, 861 integer (861 binary) Found heuristic solution: objective 2536.0000000 Root relaxation: objective 6.945000e+02, 81 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 694.50000 0 12 2536.00000 694.50000 72.6% - 0s Another try with MIP start H 0 0 712.0000000 694.50000 2.46% - 0s 0 0 695.50000 0 12 712.00000 695.50000 2.32% - 0s 0 0 695.50000 0 12 712.00000 695.50000 2.32% - 0s 0 0 695.50000 0 12 712.00000 695.50000 2.32% - 0s 0 0 696.66667 0 20 712.00000 696.66667 2.15% - 0s 0 0 696.88889 0 32 712.00000 696.88889 2.12% - 0s 0 0 698.28571 0 23 712.00000 698.28571 1.93% - 0s 0 0 698.40000 0 22 712.00000 698.40000 1.91% - 0s 0 0 698.66667 0 27 712.00000 698.66667 1.87% - 0s 0 0 698.81481 0 39 712.00000 698.81481 1.85% - 0s 0 0 698.86128 0 45 712.00000 698.86128 1.85% - 0s 0 0 698.97917 0 47 712.00000 698.97917 1.83% - 0s H 0 0 699.0000000 698.97917 0.00% - 0s Cutting planes: Gomory: 1 Zero half: 9 Mod-K: 1 Explored 0 nodes (187 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.990000000000e+02, best bound 6.990000000000e+02, gap 0.0% Gurobi 5.0.1 (linux64) logging started Sun Nov 25 02:42:23 2012