current bounds on the number of colors: 0 -- 136 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:20 2012 Optimize a model with 33048 rows, 9732 columns and 107984 nonzeros Presolve time: 0.15s Presolved: 33048 rows, 9732 columns, 107984 nonzeros Variable types: 0 continuous, 9732 integer (9732 binary) Root relaxation: objective 0.000000e+00, 409 iterations, 0.02 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (671 simplex iterations) in 0.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 68 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:20 2012 Optimize a model with 16592 rows, 5108 columns and 53992 nonzeros Presolve time: 0.08s Presolved: 16592 rows, 5108 columns, 53992 nonzeros Variable types: 0 continuous, 5108 integer (5108 binary) Root relaxation: objective 0.000000e+00, 364 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (759 simplex iterations) in 0.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 34 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:21 2012 Optimize a model with 8364 rows, 2796 columns and 26996 nonzeros Presolve time: 0.03s Presolved: 8364 rows, 2796 columns, 26996 nonzeros Variable types: 0 continuous, 2796 integer (2796 binary) Root relaxation: objective 0.000000e+00, 281 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (504 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:21 2012 Optimize a model with 4008 rows, 1572 columns and 12704 nonzeros Presolve time: 0.01s Presolved: 4008 rows, 1572 columns, 12704 nonzeros Variable types: 0 continuous, 1572 integer (1572 binary) Root relaxation: objective 0.000000e+00, 292 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (533 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:21 2012 Optimize a model with 2072 rows, 1028 columns and 6352 nonzeros Presolve time: 0.01s Presolved: 2072 rows, 1028 columns, 6352 nonzeros Variable types: 0 continuous, 1028 integer (1028 binary) Root relaxation: objective 0.000000e+00, 314 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 250 - 0.00000 - - 0s 0 0 0.00000 0 230 - 0.00000 - - 0s 0 0 0.00000 0 240 - 0.00000 - - 0s 0 0 0.00000 0 246 - 0.00000 - - 0s 0 0 0.00000 0 200 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Zero half: 2 Explored 0 nodes (6151 simplex iterations) in 0.38 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:21 2012 Optimize a model with 1104 rows, 756 columns and 3176 nonzeros Presolve removed 136 rows and 136 columns Presolve time: 0.00s Presolved: 968 rows, 620 columns, 2904 nonzeros Variable types: 0 continuous, 620 integer (620 binary) Root relaxation: objective 0.000000e+00, 143 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 136 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (574 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:21 2012 Optimize a model with 1588 rows, 892 columns and 4764 nonzeros Presolve time: 0.00s Presolved: 1588 rows, 892 columns, 4764 nonzeros Variable types: 0 continuous, 892 integer (892 binary) Root relaxation: objective 0.000000e+00, 314 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 266 - 0.00000 - - 0s 0 0 0.00000 0 258 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2579 simplex iterations) in 0.20 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4