current bounds on the number of colors: 0 -- 109 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:47 2012 Optimize a model with 15607 rows, 6173 columns and 52380 nonzeros Presolve removed 1 rows and 54 columns Presolve time: 0.11s Presolved: 15606 rows, 6119 columns, 52326 nonzeros Variable types: 0 continuous, 6119 integer (6119 binary) Root relaxation: objective 0.000000e+00, 275 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 (275 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 -- 54 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:47 2012 Optimize a model with 7858 rows, 3230 columns and 26190 nonzeros Presolve removed 1 rows and 27 columns Presolve time: 0.04s Presolved: 7857 rows, 3203 columns, 26163 nonzeros Variable types: 0 continuous, 3203 integer (3203 binary) Root relaxation: objective 0.000000e+00, 251 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 (251 simplex iterations) in 0.04 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 18:26:48 2012 Optimize a model with 3840 rows, 1704 columns and 12610 nonzeros Presolve removed 1 rows and 13 columns Presolve time: 0.01s Presolved: 3839 rows, 1691 columns, 12597 nonzeros Variable types: 0 continuous, 1691 integer (1691 binary) Root relaxation: objective 0.000000e+00, 239 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 (420 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 18:26:48 2012 Optimize a model with 1831 rows, 941 columns and 5820 nonzeros Presolve removed 1 rows and 6 columns Presolve time: 0.01s Presolved: 1830 rows, 935 columns, 5814 nonzeros Variable types: 0 continuous, 935 integer (935 binary) Root relaxation: objective 0.000000e+00, 244 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 (420 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 18:26:48 2012 Optimize a model with 970 rows, 614 columns and 2910 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 969 rows, 611 columns, 2907 nonzeros Variable types: 0 continuous, 611 integer (611 binary) Root relaxation: objective 0.000000e+00, 265 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 0 198 - 0.00000 - - 0s 0 0 0.00000 0 198 - 0.00000 - - 0s 0 0 0.00000 0 185 - 0.00000 - - 0s 0 0 0.00000 0 241 - 0.00000 - - 0s 0 0 0.00000 0 216 - 0.00000 - - 0s 0 0 0.00000 0 201 - 0.00000 - - 0s 0 0 0.00000 0 224 - 0.00000 - - 0s 0 0 0.00000 0 174 - 0.00000 - - 0s 0 0 0.00000 0 195 - 0.00000 - - 0s 0 0 0.00000 0 207 - 0.00000 - - 0s 0 0 0.00000 0 207 - 0.00000 - - 0s 0 2 0.00000 0 207 - 0.00000 - - 0s Cutting planes: Zero half: 11 Explored 29 nodes (9890 simplex iterations) in 0.64 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 18:26:48 2012 Optimize a model with 1257 rows, 723 columns and 3880 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1256 rows, 719 columns, 3876 nonzeros Variable types: 0 continuous, 719 integer (719 binary) Root relaxation: objective 0.000000e+00, 239 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 (746 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