current bounds on the number of colors: 0 -- 123 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:40 2012 Optimize a model with 25621 rows, 7921 columns and 83997 nonzeros Presolve time: 0.13s Presolved: 25621 rows, 7921 columns, 83997 nonzeros Variable types: 0 continuous, 7921 integer (7921 binary) Root relaxation: objective 0.000000e+00, 398 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 (748 simplex iterations) in 0.20 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 -- 61 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:41 2012 Optimize a model with 12663 rows, 4108 columns and 41310 nonzeros Presolve time: 0.06s Presolved: 12663 rows, 4108 columns, 41310 nonzeros Variable types: 0 continuous, 4108 integer (4108 binary) Root relaxation: objective 0.000000e+00, 302 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 (541 simplex iterations) in 0.09 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 -- 30 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:41 2012 Optimize a model with 6393 rows, 2263 columns and 20655 nonzeros Presolve time: 0.02s Presolved: 6393 rows, 2263 columns, 20655 nonzeros Variable types: 0 continuous, 2263 integer (2263 binary) Root relaxation: objective 0.000000e+00, 256 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 (462 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 -- 15 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:41 2012 Optimize a model with 3049 rows, 1279 columns and 9639 nonzeros Presolve time: 0.01s Presolved: 3049 rows, 1279 columns, 9639 nonzeros Variable types: 0 continuous, 1279 integer (1279 binary) Root relaxation: objective 0.000000e+00, 284 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 (499 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 18:31:41 2012 Optimize a model with 1377 rows, 787 columns and 4131 nonzeros Presolve time: 0.00s Presolved: 1377 rows, 787 columns, 4131 nonzeros Variable types: 0 continuous, 787 integer (787 binary) Root relaxation: objective 0.000000e+00, 284 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 0 230 - 0.00000 - - 0s 0 0 0.00000 0 234 - 0.00000 - - 0s 0 0 0.00000 0 315 - 0.00000 - - 0s 0 0 0.00000 0 326 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Zero half: 203 Explored 0 nodes (4314 simplex iterations) in 0.35 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: 3 -- 7 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:31:42 2012 Optimize a model with 2213 rows, 1033 columns and 6885 nonzeros Presolve time: 0.01s Presolved: 2213 rows, 1033 columns, 6885 nonzeros Variable types: 0 continuous, 1033 integer (1033 binary) Root relaxation: objective 0.000000e+00, 282 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 (784 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 18:31:42 2012 Optimize a model with 1795 rows, 910 columns and 5508 nonzeros Presolve time: 0.00s Presolved: 1795 rows, 910 columns, 5508 nonzeros Variable types: 0 continuous, 910 integer (910 binary) Root relaxation: objective 0.000000e+00, 295 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 0 220 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 1 Clique: 48 Zero half: 150 Explored 0 nodes (2651 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% optimal solution found: number of colors: 4