current bounds on the number of colors: 0 -- 139 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:39:22 2012 Optimize a model with 35812 rows, 10108 columns and 116610 nonzeros Presolve time: 0.14s Presolved: 35812 rows, 10108 columns, 116610 nonzeros Variable types: 0 continuous, 10108 integer (10108 binary) Root relaxation: objective 0.000000e+00, 474 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 (769 simplex iterations) in 0.22 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 -- 69 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:39:23 2012 Optimize a model with 17717 rows, 5243 columns and 57460 nonzeros Presolve time: 0.09s Presolved: 17717 rows, 5243 columns, 57460 nonzeros Variable types: 0 continuous, 5243 integer (5243 binary) Root relaxation: objective 0.000000e+00, 352 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 (586 simplex iterations) in 0.12 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 -- 34 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:39:23 2012 Optimize a model with 8928 rows, 2880 columns and 28730 nonzeros Presolve time: 0.03s Presolved: 8928 rows, 2880 columns, 28730 nonzeros Variable types: 0 continuous, 2880 integer (2880 binary) Root relaxation: objective 0.000000e+00, 290 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 (539 simplex iterations) in 0.05 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 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:39:24 2012 Optimize a model with 4275 rows, 1629 columns and 13520 nonzeros Presolve time: 0.01s Presolved: 4275 rows, 1629 columns, 13520 nonzeros Variable types: 0 continuous, 1629 integer (1629 binary) Root relaxation: objective 0.000000e+00, 302 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 (549 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:39:24 2012 Optimize a model with 2207 rows, 1073 columns and 6760 nonzeros Presolve time: 0.01s Presolved: 2207 rows, 1073 columns, 6760 nonzeros Variable types: 0 continuous, 1073 integer (1073 binary) Root relaxation: objective 0.000000e+00, 336 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 250 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1570 simplex iterations) in 0.05 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 18:39:24 2012 Optimize a model with 1173 rows, 795 columns and 3380 nonzeros Presolve removed 139 rows and 139 columns Presolve time: 0.00s Presolved: 1034 rows, 656 columns, 3102 nonzeros Variable types: 0 continuous, 656 integer (656 binary) Root relaxation: objective 0.000000e+00, 146 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 0 139 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (592 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 18:39:24 2012 Optimize a model with 1690 rows, 934 columns and 5070 nonzeros Presolve time: 0.00s Presolved: 1690 rows, 934 columns, 5070 nonzeros Variable types: 0 continuous, 934 integer (934 binary) Root relaxation: objective 0.000000e+00, 323 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 0 268 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 0s 0 0 0.00000 0 334 - 0.00000 - - 0s 0 0 0.00000 0 341 - 0.00000 - - 0s 0 0 0.00000 0 369 - 0.00000 - - 0s 0 0 0.00000 0 371 - 0.00000 - - 0s 0 0 0.00000 0 342 - 0.00000 - - 0s 0 0 0.00000 0 336 - 0.00000 - - 1s 0 0 0.00000 0 342 - 0.00000 - - 1s 0 0 0.00000 0 373 - 0.00000 - - 1s 0 0 0.00000 0 372 - 0.00000 - - 1s 0 2 0.00000 0 372 - 0.00000 - - 1s Cutting planes: Zero half: 18 Explored 3 nodes (18038 simplex iterations) in 1.91 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