current bounds on the number of colors: 0 -- 117 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:29:24 2012 Optimize a model with 19779 rows, 7125 columns and 65772 nonzeros Presolve time: 0.13s Presolved: 19779 rows, 7125 columns, 65772 nonzeros Variable types: 0 continuous, 7125 integer (7125 binary) Root relaxation: objective 0.000000e+00, 367 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 (603 simplex iterations) in 0.17 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 -- 58 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:29:24 2012 Optimize a model with 9948 rows, 3732 columns and 32886 nonzeros Presolve time: 0.05s Presolved: 9948 rows, 3732 columns, 32886 nonzeros Variable types: 0 continuous, 3732 integer (3732 binary) Root relaxation: objective 0.000000e+00, 282 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 (488 simplex iterations) in 0.07 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 -- 29 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:29:24 2012 Optimize a model with 4863 rows, 1977 columns and 15876 nonzeros Presolve time: 0.02s Presolved: 4863 rows, 1977 columns, 15876 nonzeros Variable types: 0 continuous, 1977 integer (1977 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (432 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 -- 14 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:29:24 2012 Optimize a model with 2490 rows, 1158 columns and 7938 nonzeros Presolve time: 0.01s Presolved: 2490 rows, 1158 columns, 7938 nonzeros Variable types: 0 continuous, 1158 integer (1158 binary) Root relaxation: objective 0.000000e+00, 257 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 (442 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 -- 7 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:29:24 2012 Optimize a model with 1134 rows, 690 columns and 3402 nonzeros Presolve time: 0.00s Presolved: 1134 rows, 690 columns, 3402 nonzeros Variable types: 0 continuous, 690 integer (690 binary) Root relaxation: objective 0.000000e+00, 273 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 0 208 - 0.00000 - - 0s 0 0 0.00000 0 215 - 0.00000 - - 0s 0 0 0.00000 0 220 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 284 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 262 - 0.00000 - - 0s 0 0 0.00000 0 190 - 0.00000 - - 0s 0 0 0.00000 0 266 - 0.00000 - - 0s 0 0 0.00000 0 267 - 0.00000 - - 0s 0 0 0.00000 0 262 - 0.00000 - - 0s 0 0 0.00000 0 208 - 0.00000 - - 0s 0 0 0.00000 0 231 - 0.00000 - - 1s 0 0 0.00000 0 231 - 0.00000 - - 1s 0 2 0.00000 0 230 - 0.00000 - - 1s Cutting planes: Zero half: 15 Explored 9 nodes (16906 simplex iterations) in 1.19 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 -- 7 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:29:26 2012 Optimize a model with 1812 rows, 924 columns and 5670 nonzeros Presolve time: 0.01s Presolved: 1812 rows, 924 columns, 5670 nonzeros Variable types: 0 continuous, 924 integer (924 binary) Root relaxation: objective 0.000000e+00, 264 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 (671 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:29:26 2012 Optimize a model with 1473 rows, 807 columns and 4536 nonzeros Presolve time: 0.00s Presolved: 1473 rows, 807 columns, 4536 nonzeros Variable types: 0 continuous, 807 integer (807 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 0.00000 0 188 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1143 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% optimal solution found: number of colors: 4