current bounds on the number of colors: 0 -- 156 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:59:55 2012 Optimize a model with 47346 rows, 12773 columns and 153738 nonzeros Presolve time: 0.17s Presolved: 47346 rows, 12773 columns, 153738 nonzeros Variable types: 0 continuous, 12773 integer (12773 binary) Root relaxation: objective 0.000000e+00, 550 iterations, 0.04 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 (896 simplex iterations) in 0.28 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 -- 78 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:59:56 2012 Optimize a model with 23751 rows, 6689 columns and 76869 nonzeros Presolve time: 0.13s Presolved: 23751 rows, 6689 columns, 76869 nonzeros Variable types: 0 continuous, 6689 integer (6689 binary) Root relaxation: objective 0.000000e+00, 457 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 (812 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 -- 39 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:59:56 2012 Optimize a model with 11651 rows, 3569 columns and 37449 nonzeros Presolve time: 0.04s Presolved: 11651 rows, 3569 columns, 37449 nonzeros Variable types: 0 continuous, 3569 integer (3569 binary) Root relaxation: objective 0.000000e+00, 331 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 (613 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:59:57 2012 Optimize a model with 5601 rows, 2009 columns and 17739 nonzeros Presolve time: 0.02s Presolved: 5601 rows, 2009 columns, 17739 nonzeros Variable types: 0 continuous, 2009 integer (2009 binary) Root relaxation: objective 0.000000e+00, 344 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 (750 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:59:57 2012 Optimize a model with 2576 rows, 1229 columns and 7884 nonzeros Presolve time: 0.01s Presolved: 2576 rows, 1229 columns, 7884 nonzeros Variable types: 0 continuous, 1229 integer (1229 binary) Root relaxation: objective 0.000000e+00, 365 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 0 298 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 287 - 0.00000 - - 0s 0 0 0.00000 0 260 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 0s 0 0 0.00000 0 246 - 0.00000 - - 0s 0 0 0.00000 0 228 - 0.00000 - - 1s 0 0 0.00000 0 212 - 0.00000 - - 1s 0 0 0.00000 0 226 - 0.00000 - - 1s 0 0 0.00000 0 235 - 0.00000 - - 1s 0 0 0.00000 0 202 - 0.00000 - - 1s 0 0 0.00000 0 196 - 0.00000 - - 1s 0 0 0.00000 0 198 - 0.00000 - - 2s 0 0 0.00000 0 198 - 0.00000 - - 2s 0 2 0.00000 0 198 - 0.00000 - - 2s * 604 136 13 0.0000000 0.00000 0.0% 48.5 4s Cutting planes: Gomory: 46 Zero half: 335 Explored 604 nodes (61543 simplex iterations) in 4.24 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 19:00:01 2012 Optimize a model with 1366 rows, 917 columns and 3942 nonzeros Presolve removed 156 rows and 156 columns Presolve time: 0.00s Presolved: 1210 rows, 761 columns, 3630 nonzeros Variable types: 0 continuous, 761 integer (761 binary) Root relaxation: objective 0.000000e+00, 160 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 0 156 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (661 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 19:00:01 2012 Optimize a model with 1971 rows, 1073 columns and 5913 nonzeros Presolve time: 0.00s Presolved: 1971 rows, 1073 columns, 5913 nonzeros Variable types: 0 continuous, 1073 integer (1073 binary) Root relaxation: objective 0.000000e+00, 371 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 0 224 - 0.00000 - - 0s 0 0 0.00000 0 315 - 0.00000 - - 0s 0 0 0.00000 0 361 - 0.00000 - - 0s 0 0 0.00000 0 424 - 0.00000 - - 0s 0 0 0.00000 0 426 - 0.00000 - - 1s 0 0 0.00000 0 308 - 0.00000 - - 1s 0 0 0.00000 0 374 - 0.00000 - - 1s 0 0 0.00000 0 372 - 0.00000 - - 2s 0 0 0.00000 0 380 - 0.00000 - - 2s 0 0 0.00000 0 380 - 0.00000 - - 2s 0 2 0.00000 0 380 - 0.00000 - - 2s Cutting planes: Zero half: 25 Explored 3 nodes (22615 simplex iterations) in 2.64 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