current bounds on the number of colors: 0 -- 139 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:39:18 2012 Optimize a model with 33328 rows, 10072 columns and 109158 nonzeros Presolve removed 1 rows and 69 columns Presolve time: 0.15s Presolved: 33327 rows, 10003 columns, 109089 nonzeros Variable types: 0 continuous, 10003 integer (10003 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 (731 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 18:39:19 2012 Optimize a model with 16493 rows, 5207 columns and 53788 nonzeros Presolve removed 1 rows and 34 columns Presolve time: 0.08s Presolved: 16492 rows, 5173 columns, 53754 nonzeros Variable types: 0 continuous, 5173 integer (5173 binary) Root relaxation: objective 0.000000e+00, 357 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 (604 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 18:39:19 2012 Optimize a model with 8316 rows, 2844 columns and 26894 nonzeros Presolve removed 1 rows and 17 columns Presolve time: 0.03s Presolved: 8315 rows, 2827 columns, 26877 nonzeros Variable types: 0 continuous, 2827 integer (2827 binary) Root relaxation: objective 0.000000e+00, 280 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 (516 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 18:39:20 2012 Optimize a model with 3987 rows, 1593 columns and 12656 nonzeros Presolve removed 1 rows and 8 columns Presolve time: 0.01s Presolved: 3986 rows, 1585 columns, 12648 nonzeros Variable types: 0 continuous, 1585 integer (1585 binary) Root relaxation: objective 0.000000e+00, 294 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 (653 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:39:20 2012 Optimize a model with 2063 rows, 1037 columns and 6328 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.01s Presolved: 2062 rows, 1033 columns, 6324 nonzeros Variable types: 0 continuous, 1033 integer (1033 binary) Root relaxation: objective 0.000000e+00, 334 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 0 148 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2195 simplex iterations) in 0.08 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 18:39:20 2012 Optimize a model with 1101 rows, 759 columns and 3164 nonzeros Presolve removed 139 rows and 140 columns Presolve time: 0.00s Presolved: 962 rows, 619 columns, 2886 nonzeros Variable types: 0 continuous, 619 integer (619 binary) Root relaxation: objective 0.000000e+00, 151 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 0 138 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (557 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 18:39:20 2012 Optimize a model with 1582 rows, 898 columns and 4746 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 1581 rows, 895 columns, 4743 nonzeros Variable types: 0 continuous, 895 integer (895 binary) Root relaxation: objective 0.000000e+00, 325 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 0 266 - 0.00000 - - 0s 0 0 0.00000 0 258 - 0.00000 - - 0s 0 0 0.00000 0 318 - 0.00000 - - 0s 0 0 0.00000 0 339 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 277 - 0.00000 - - 0s 0 0 0.00000 0 352 - 0.00000 - - 0s 0 0 0.00000 0 325 - 0.00000 - - 1s 0 0 0.00000 0 339 - 0.00000 - - 1s 0 0 0.00000 0 305 - 0.00000 - - 1s 0 0 0.00000 0 349 - 0.00000 - - 1s 0 0 0.00000 0 349 - 0.00000 - - 1s 0 2 0.00000 0 301 - 0.00000 - - 1s Cutting planes: Zero half: 28 Explored 5 nodes (18719 simplex iterations) in 1.83 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