current bounds on the number of colors: 0 -- 80 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:39:49 2012 Optimize a model with 11720 rows, 3491 columns and 38120 nonzeros Presolve time: 0.06s Presolved: 11720 rows, 3491 columns, 38120 nonzeros Variable types: 0 continuous, 3491 integer (3491 binary) Root relaxation: objective 0.000000e+00, 209 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 (395 simplex iterations) in 0.09 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 -- 40 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:39:49 2012 Optimize a model with 5900 rows, 1891 columns and 19060 nonzeros Presolve time: 0.02s Presolved: 5900 rows, 1891 columns, 19060 nonzeros Variable types: 0 continuous, 1891 integer (1891 binary) Root relaxation: objective 0.000000e+00, 174 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 (321 simplex iterations) in 0.03 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 -- 20 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:39:49 2012 Optimize a model with 2990 rows, 1091 columns and 9530 nonzeros Presolve time: 0.01s Presolved: 2990 rows, 1091 columns, 9530 nonzeros Variable types: 0 continuous, 1091 integer (1091 binary) Root relaxation: objective 0.000000e+00, 173 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 (307 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 -- 10 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:39:49 2012 Optimize a model with 1535 rows, 691 columns and 4765 nonzeros Presolve time: 0.00s Presolved: 1535 rows, 691 columns, 4765 nonzeros Variable types: 0 continuous, 691 integer (691 binary) Root relaxation: objective 0.000000e+00, 176 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 (579 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 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:39:49 2012 Optimize a model with 662 rows, 451 columns and 1906 nonzeros Presolve removed 80 rows and 80 columns Presolve time: 0.00s Presolved: 582 rows, 371 columns, 1746 nonzeros Variable types: 0 continuous, 371 integer (371 binary) Root relaxation: objective 0.000000e+00, 86 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 80 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (319 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 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:39:49 2012 Optimize a model with 953 rows, 531 columns and 2859 nonzeros Presolve time: 0.00s Presolved: 953 rows, 531 columns, 2859 nonzeros Variable types: 0 continuous, 531 integer (531 binary) Root relaxation: objective 0.000000e+00, 177 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 0 156 - 0.00000 - - 0s 0 0 0.00000 0 152 - 0.00000 - - 0s 0 0 0.00000 0 219 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 5 Clique: 1 Zero half: 309 Explored 0 nodes (2596 simplex iterations) in 0.17 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:39:50 2012 Optimize a model with 1244 rows, 611 columns and 3812 nonzeros Presolve time: 0.00s Presolved: 1244 rows, 611 columns, 3812 nonzeros Variable types: 0 continuous, 611 integer (611 binary) Root relaxation: objective 0.000000e+00, 187 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 0 150 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (654 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% optimal solution found: number of colors: 4