current bounds on the number of colors: 0 -- 105 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:40 2012 Optimize a model with 14613 rows, 5739 columns and 48984 nonzeros Presolve removed 2 rows and 104 columns Presolve time: 0.10s Presolved: 14611 rows, 5635 columns, 48880 nonzeros Variable types: 0 continuous, 5635 integer (5635 binary) Root relaxation: objective 0.000000e+00, 288 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 (470 simplex iterations) in 0.13 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 -- 52 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:25:40 2012 Optimize a model with 7359 rows, 3009 columns and 24492 nonzeros Presolve removed 2 rows and 52 columns Presolve time: 0.03s Presolved: 7357 rows, 2957 columns, 24440 nonzeros Variable types: 0 continuous, 2957 integer (2957 binary) Root relaxation: objective 0.000000e+00, 253 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 (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 18:25:40 2012 Optimize a model with 3732 rows, 1644 columns and 12246 nonzeros Presolve removed 2 rows and 26 columns Presolve time: 0.01s Presolved: 3730 rows, 1618 columns, 12220 nonzeros Variable types: 0 continuous, 1618 integer (1618 binary) Root relaxation: objective 0.000000e+00, 211 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 (474 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 18:25:40 2012 Optimize a model with 1779 rows, 909 columns and 5652 nonzeros Presolve removed 2 rows and 12 columns Presolve time: 0.01s Presolved: 1777 rows, 897 columns, 5640 nonzeros Variable types: 0 continuous, 897 integer (897 binary) Root relaxation: objective 0.000000e+00, 230 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 (404 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 18:25:40 2012 Optimize a model with 942 rows, 594 columns and 2826 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 940 rows, 588 columns, 2820 nonzeros Variable types: 0 continuous, 588 integer (588 binary) Root relaxation: objective 0.000000e+00, 238 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 0 180 - 0.00000 - - 0s 0 0 0.00000 0 209 - 0.00000 - - 0s 0 0 0.00000 0 188 - 0.00000 - - 0s 0 0 0.00000 0 224 - 0.00000 - - 0s 0 0 0.00000 0 183 - 0.00000 - - 0s 0 0 0.00000 0 191 - 0.00000 - - 0s 0 0 0.00000 0 204 - 0.00000 - - 0s 0 0 0.00000 0 204 - 0.00000 - - 0s 0 2 0.00000 0 169 - 0.00000 - - 0s Cutting planes: Zero half: 11 Explored 15 nodes (7272 simplex iterations) in 0.39 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 18:25:41 2012 Optimize a model with 1221 rows, 699 columns and 3768 nonzeros Presolve removed 2 rows and 8 columns Presolve time: 0.00s Presolved: 1219 rows, 691 columns, 3760 nonzeros Variable types: 0 continuous, 691 integer (691 binary) Root relaxation: objective 0.000000e+00, 248 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 (668 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