current bounds on the number of colors: 0 -- 110 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:27:02 2012 Optimize a model with 15400 rows, 6328 columns and 51920 nonzeros Presolve removed 1 rows and 55 columns Presolve time: 0.11s Presolved: 15399 rows, 6273 columns, 51865 nonzeros Variable types: 0 continuous, 6273 integer (6273 binary) Root relaxation: objective 0.000000e+00, 277 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 (454 simplex iterations) in 0.14 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 -- 55 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:27:02 2012 Optimize a model with 7616 rows, 3248 columns and 25488 nonzeros Presolve removed 1 rows and 27 columns Presolve time: 0.04s Presolved: 7615 rows, 3221 columns, 25461 nonzeros Variable types: 0 continuous, 3221 integer (3221 binary) Root relaxation: objective 0.000000e+00, 245 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 (410 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 -- 27 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:27:02 2012 Optimize a model with 3724 rows, 1708 columns and 12272 nonzeros Presolve removed 1 rows and 13 columns Presolve time: 0.01s Presolved: 3723 rows, 1695 columns, 12259 nonzeros Variable types: 0 continuous, 1695 integer (1695 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 (405 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 18:27:03 2012 Optimize a model with 1778 rows, 938 columns and 5664 nonzeros Presolve removed 1 rows and 6 columns Presolve time: 0.01s Presolved: 1777 rows, 932 columns, 5658 nonzeros Variable types: 0 continuous, 932 integer (932 binary) Root relaxation: objective 0.000000e+00, 240 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 (408 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 18:27:03 2012 Optimize a model with 944 rows, 608 columns and 2832 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 943 rows, 605 columns, 2829 nonzeros Variable types: 0 continuous, 605 integer (605 binary) Root relaxation: objective 0.000000e+00, 267 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 0 184 - 0.00000 - - 0s 0 0 0.00000 0 188 - 0.00000 - - 0s 0 0 0.00000 0 184 - 0.00000 - - 0s 0 0 0.00000 0 233 - 0.00000 - - 0s 0 0 0.00000 0 239 - 0.00000 - - 0s 0 0 0.00000 0 207 - 0.00000 - - 0s 0 0 0.00000 0 233 - 0.00000 - - 0s 0 0 0.00000 0 233 - 0.00000 - - 0s 0 2 0.00000 0 233 - 0.00000 - - 0s Cutting planes: Zero half: 9 Explored 11 nodes (7113 simplex iterations) in 0.41 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 18:27:03 2012 Optimize a model with 1222 rows, 718 columns and 3776 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1221 rows, 714 columns, 3772 nonzeros Variable types: 0 continuous, 714 integer (714 binary) Root relaxation: objective 0.000000e+00, 256 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 (465 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