current bounds on the number of colors: 0 -- 152 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:09 2012 Optimize a model with 42180 rows, 12105 columns and 137636 nonzeros Presolve time: 0.15s Presolved: 42180 rows, 12105 columns, 137636 nonzeros Variable types: 0 continuous, 12105 integer (12105 binary) Root relaxation: objective 0.000000e+00, 531 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 (844 simplex iterations) in 0.24 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 -- 76 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:10 2012 Optimize a model with 21166 rows, 6329 columns and 68818 nonzeros Presolve time: 0.11s Presolved: 21166 rows, 6329 columns, 68818 nonzeros Variable types: 0 continuous, 6329 integer (6329 binary) Root relaxation: objective 0.000000e+00, 417 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 (704 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 -- 38 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:10 2012 Optimize a model with 10659 rows, 3441 columns and 34409 nonzeros Presolve time: 0.04s Presolved: 10659 rows, 3441 columns, 34409 nonzeros Variable types: 0 continuous, 3441 integer (3441 binary) Root relaxation: objective 0.000000e+00, 315 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 (594 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:10 2012 Optimize a model with 5129 rows, 1921 columns and 16299 nonzeros Presolve time: 0.02s Presolved: 5129 rows, 1921 columns, 16299 nonzeros Variable types: 0 continuous, 1921 integer (1921 binary) Root relaxation: objective 0.000000e+00, 342 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 (590 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 18:50:10 2012 Optimize a model with 2364 rows, 1161 columns and 7244 nonzeros Presolve time: 0.01s Presolved: 2364 rows, 1161 columns, 7244 nonzeros Variable types: 0 continuous, 1161 integer (1161 binary) Root relaxation: objective 0.000000e+00, 351 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 0 106 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2935 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:50:11 2012 Optimize a model with 1258 rows, 857 columns and 3622 nonzeros Presolve removed 152 rows and 152 columns Presolve time: 0.00s Presolved: 1106 rows, 705 columns, 3318 nonzeros Variable types: 0 continuous, 705 integer (705 binary) Root relaxation: objective 0.000000e+00, 164 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 0 152 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (659 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 18:50:11 2012 Optimize a model with 1811 rows, 1009 columns and 5433 nonzeros Presolve time: 0.00s Presolved: 1811 rows, 1009 columns, 5433 nonzeros Variable types: 0 continuous, 1009 integer (1009 binary) Root relaxation: objective 0.000000e+00, 355 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 0 294 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 286 - 0.00000 - - 0s 0 0 0.00000 0 344 - 0.00000 - - 0s 0 0 0.00000 0 349 - 0.00000 - - 0s 0 0 0.00000 0 353 - 0.00000 - - 0s 0 0 0.00000 0 319 - 0.00000 - - 1s 0 0 0.00000 0 274 - 0.00000 - - 1s 0 0 0.00000 0 266 - 0.00000 - - 1s 0 0 0.00000 0 334 - 0.00000 - - 1s 0 0 0.00000 0 345 - 0.00000 - - 1s 0 0 0.00000 0 345 - 0.00000 - - 2s 0 2 0.00000 0 345 - 0.00000 - - 2s Cutting planes: Zero half: 25 Explored 3 nodes (23168 simplex iterations) in 2.22 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