current bounds on the number of colors: 0 -- 145 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:43:17 2012 Optimize a model with 39961 rows, 10993 columns and 129888 nonzeros Presolve time: 0.15s Presolved: 39961 rows, 10993 columns, 129888 nonzeros Variable types: 0 continuous, 10993 integer (10993 binary) Root relaxation: objective 0.000000e+00, 448 iterations, 0.03 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 (448 simplex iterations) in 0.19 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 -- 72 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:43:17 2012 Optimize a model with 20053 rows, 5773 columns and 64944 nonzeros Presolve time: 0.10s Presolved: 20053 rows, 5773 columns, 64944 nonzeros Variable types: 0 continuous, 5773 integer (5773 binary) Root relaxation: objective 0.000000e+00, 432 iterations, 0.02 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 (753 simplex iterations) in 0.15 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 -- 36 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:43:18 2012 Optimize a model with 10099 rows, 3163 columns and 32472 nonzeros Presolve time: 0.04s Presolved: 10099 rows, 3163 columns, 32472 nonzeros Variable types: 0 continuous, 3163 integer (3163 binary) Root relaxation: objective 0.000000e+00, 366 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 (649 simplex iterations) in 0.06 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 -- 18 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:43:18 2012 Optimize a model with 5122 rows, 1858 columns and 16236 nonzeros Presolve time: 0.02s Presolved: 5122 rows, 1858 columns, 16236 nonzeros Variable types: 0 continuous, 1858 integer (1858 binary) Root relaxation: objective 0.000000e+00, 314 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 (736 simplex iterations) in 0.03 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:43:18 2012 Optimize a model with 2357 rows, 1133 columns and 7216 nonzeros Presolve time: 0.01s Presolved: 2357 rows, 1133 columns, 7216 nonzeros Variable types: 0 continuous, 1133 integer (1133 binary) Root relaxation: objective 0.000000e+00, 341 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 0 278 - 0.00000 - - 0s 0 0 0.00000 0 230 - 0.00000 - - 0s 0 0 0.00000 0 262 - 0.00000 - - 0s 0 0 0.00000 0 264 - 0.00000 - - 0s 0 0 0.00000 0 234 - 0.00000 - - 0s 0 0 0.00000 0 236 - 0.00000 - - 0s 0 0 0.00000 0 222 - 0.00000 - - 0s 0 0 0.00000 0 200 - 0.00000 - - 0s 0 0 0.00000 0 196 - 0.00000 - - 0s 0 0 0.00000 0 188 - 0.00000 - - 1s 0 0 0.00000 0 192 - 0.00000 - - 1s * 0 0 0 0.0000000 0.00000 0.0% - 1s Cutting planes: Zero half: 92 Explored 0 nodes (19897 simplex iterations) in 1.30 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:43:19 2012 Optimize a model with 1251 rows, 843 columns and 3608 nonzeros Presolve removed 145 rows and 145 columns Presolve time: 0.00s Presolved: 1106 rows, 698 columns, 3318 nonzeros Variable types: 0 continuous, 698 integer (698 binary) Root relaxation: objective 0.000000e+00, 157 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 0 145 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (612 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:43:20 2012 Optimize a model with 1804 rows, 988 columns and 5412 nonzeros Presolve time: 0.00s Presolved: 1804 rows, 988 columns, 5412 nonzeros Variable types: 0 continuous, 988 integer (988 binary) Root relaxation: objective 0.000000e+00, 338 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 0 284 - 0.00000 - - 0s 0 0 0.00000 0 284 - 0.00000 - - 0s 0 0 0.00000 0 286 - 0.00000 - - 0s 0 0 0.00000 0 375 - 0.00000 - - 0s 0 0 0.00000 0 286 - 0.00000 - - 0s 0 0 0.00000 0 339 - 0.00000 - - 0s 0 0 0.00000 0 357 - 0.00000 - - 0s 0 0 0.00000 0 383 - 0.00000 - - 1s 0 0 0.00000 0 327 - 0.00000 - - 1s 0 2 0.00000 0 327 - 0.00000 - - 1s Cutting planes: Zero half: 6 Explored 3 nodes (15617 simplex iterations) in 1.49 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4