current bounds on the number of colors: 0 -- 101 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:44 2012 Optimize a model with 13651 rows, 5321 columns and 45700 nonzeros Presolve removed 1 rows and 50 columns Presolve time: 0.09s Presolved: 13650 rows, 5271 columns, 45650 nonzeros Variable types: 0 continuous, 5271 integer (5271 binary) Root relaxation: objective 0.000000e+00, 276 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 (460 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 -- 50 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:45 2012 Optimize a model with 6876 rows, 2796 columns and 22850 nonzeros Presolve removed 1 rows and 25 columns Presolve time: 0.03s Presolved: 6875 rows, 2771 columns, 22825 nonzeros Variable types: 0 continuous, 2771 integer (2771 binary) Root relaxation: objective 0.000000e+00, 255 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 (442 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 -- 25 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:45 2012 Optimize a model with 3353 rows, 1483 columns and 10968 nonzeros Presolve removed 1 rows and 12 columns Presolve time: 0.01s Presolved: 3352 rows, 1471 columns, 10956 nonzeros Variable types: 0 continuous, 1471 integer (1471 binary) Root relaxation: objective 0.000000e+00, 203 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 (347 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 -- 12 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:45 2012 Optimize a model with 1727 rows, 877 columns and 5484 nonzeros Presolve removed 1 rows and 6 columns Presolve time: 0.00s Presolved: 1726 rows, 871 columns, 5478 nonzeros Variable types: 0 continuous, 871 integer (871 binary) Root relaxation: objective 0.000000e+00, 235 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 (402 simplex iterations) in 0.01 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 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:45 2012 Optimize a model with 914 rows, 574 columns and 2742 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 913 rows, 571 columns, 2739 nonzeros Variable types: 0 continuous, 571 integer (571 binary) Root relaxation: objective 0.000000e+00, 237 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 0 192 - 0.00000 - - 0s 0 0 0.00000 0 185 - 0.00000 - - 0s 0 0 0.00000 0 186 - 0.00000 - - 0s 0 0 0.00000 0 190 - 0.00000 - - 0s 0 0 0.00000 0 178 - 0.00000 - - 0s 0 0 0.00000 0 178 - 0.00000 - - 0s 0 0 0.00000 0 226 - 0.00000 - - 0s 0 0 0.00000 0 230 - 0.00000 - - 0s 0 0 0.00000 0 208 - 0.00000 - - 0s 0 2 0.00000 0 207 - 0.00000 - - 0s Cutting planes: Zero half: 5 Explored 6 nodes (7511 simplex iterations) in 0.40 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:24:45 2012 Optimize a model with 1185 rows, 675 columns and 3656 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1184 rows, 671 columns, 3652 nonzeros Variable types: 0 continuous, 671 integer (671 binary) Root relaxation: objective 0.000000e+00, 237 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 (462 simplex iterations) in 0.01 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