current bounds on the number of colors: 0 -- 77 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:39:08 2012 Optimize a model with 11515 rows, 3227 columns and 37240 nonzeros Presolve time: 0.06s Presolved: 11515 rows, 3227 columns, 37240 nonzeros Variable types: 0 continuous, 3227 integer (3227 binary) Root relaxation: objective 0.000000e+00, 204 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 (365 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 -- 38 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:39:08 2012 Optimize a model with 5796 rows, 1764 columns and 18620 nonzeros Presolve time: 0.02s Presolved: 5796 rows, 1764 columns, 18620 nonzeros Variable types: 0 continuous, 1764 integer (1764 binary) Root relaxation: objective 0.000000e+00, 161 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 (298 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 -- 19 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:39:08 2012 Optimize a model with 2786 rows, 994 columns and 8820 nonzeros Presolve time: 0.01s Presolved: 2786 rows, 994 columns, 8820 nonzeros Variable types: 0 continuous, 994 integer (994 binary) Root relaxation: objective 0.000000e+00, 165 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 (362 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 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:39:08 2012 Optimize a model with 1281 rows, 609 columns and 3920 nonzeros Presolve time: 0.00s Presolved: 1281 rows, 609 columns, 3920 nonzeros Variable types: 0 continuous, 609 integer (609 binary) Root relaxation: objective 0.000000e+00, 172 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 0 0 0.00000 0 142 - 0.00000 - - 0s 0 0 0.00000 0 122 - 0.00000 - - 0s 0 0 0.00000 0 173 - 0.00000 - - 0s 0 0 0.00000 0 147 - 0.00000 - - 0s 0 0 0.00000 0 145 - 0.00000 - - 0s 0 0 0.00000 0 149 - 0.00000 - - 0s 0 0 0.00000 0 149 - 0.00000 - - 0s 0 0 0.00000 0 149 - 0.00000 - - 0s 0 2 0.00000 0 149 - 0.00000 - - 0s * 65 0 9 0.0000000 0.00000 0.0% 57.2 0s Cutting planes: Clique: 2 Zero half: 10 Explored 66 nodes (11088 simplex iterations) in 0.60 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 Thu Dec 13 19:39:09 2012 Optimize a model with 679 rows, 455 columns and 1960 nonzeros Presolve removed 77 rows and 77 columns Presolve time: 0.00s Presolved: 602 rows, 378 columns, 1806 nonzeros Variable types: 0 continuous, 378 integer (378 binary) Root relaxation: objective 0.000000e+00, 81 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 77 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (302 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 Thu Dec 13 19:39:09 2012 Optimize a model with 980 rows, 532 columns and 2940 nonzeros Presolve time: 0.00s Presolved: 980 rows, 532 columns, 2940 nonzeros Variable types: 0 continuous, 532 integer (532 binary) Root relaxation: objective 0.000000e+00, 167 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 0 0 0.00000 0 150 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2266 simplex iterations) in 0.10 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4