current bounds on the number of colors: 0 -- 106 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:02 2012 Optimize a model with 14893 rows, 5897 columns and 49979 nonzeros Presolve removed 1 rows and 53 columns Presolve time: 0.11s Presolved: 14892 rows, 5844 columns, 49926 nonzeros Variable types: 0 continuous, 5844 integer (5844 binary) Root relaxation: objective 0.000000e+00, 279 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 (279 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 -- 53 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:02 2012 Optimize a model with 7360 rows, 3035 columns and 24518 nonzeros Presolve removed 1 rows and 26 columns Presolve time: 0.03s Presolved: 7359 rows, 3009 columns, 24492 nonzeros Variable types: 0 continuous, 3009 integer (3009 binary) Root relaxation: objective 0.000000e+00, 261 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 (441 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 -- 26 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:02 2012 Optimize a model with 3733 rows, 1657 columns and 12259 nonzeros Presolve removed 1 rows and 13 columns Presolve time: 0.01s Presolved: 3732 rows, 1644 columns, 12246 nonzeros Variable types: 0 continuous, 1644 integer (1644 binary) Root relaxation: objective 0.000000e+00, 233 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 (393 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 -- 13 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:02 2012 Optimize a model with 1780 rows, 915 columns and 5658 nonzeros Presolve removed 1 rows and 6 columns Presolve time: 0.01s Presolved: 1779 rows, 909 columns, 5652 nonzeros Variable types: 0 continuous, 909 integer (909 binary) Root relaxation: objective 0.000000e+00, 247 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 (411 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 18:26:02 2012 Optimize a model with 943 rows, 597 columns and 2829 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 942 rows, 594 columns, 2826 nonzeros Variable types: 0 continuous, 594 integer (594 binary) Root relaxation: objective 0.000000e+00, 243 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 0 188 - 0.00000 - - 0s 0 0 0.00000 0 194 - 0.00000 - - 0s 0 0 0.00000 0 164 - 0.00000 - - 0s 0 0 0.00000 0 253 - 0.00000 - - 0s 0 0 0.00000 0 219 - 0.00000 - - 0s 0 0 0.00000 0 239 - 0.00000 - - 0s 0 0 0.00000 0 223 - 0.00000 - - 0s 0 0 0.00000 0 223 - 0.00000 - - 0s 0 0 0.00000 0 223 - 0.00000 - - 0s 0 2 0.00000 0 223 - 0.00000 - - 0s Cutting planes: Zero half: 14 Explored 18 nodes (8415 simplex iterations) in 0.52 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 18:26:03 2012 Optimize a model with 1222 rows, 703 columns and 3772 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1221 rows, 699 columns, 3768 nonzeros Variable types: 0 continuous, 699 integer (699 binary) Root relaxation: objective 0.000000e+00, 251 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 (652 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