current bounds on the number of colors: 0 -- 97 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:50:02 2012 Optimize a model with 24529 rows, 5165 columns and 77952 nonzeros Presolve time: 0.13s Presolved: 24529 rows, 5165 columns, 77952 nonzeros Variable types: 0 continuous, 5165 integer (5165 binary) Root relaxation: objective 0.000000e+00, 270 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 (516 simplex iterations) in 0.18 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 -- 48 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:50:03 2012 Optimize a model with 12313 rows, 2837 columns and 38976 nonzeros Presolve time: 0.05s Presolved: 12313 rows, 2837 columns, 38976 nonzeros Variable types: 0 continuous, 2837 integer (2837 binary) Root relaxation: objective 0.000000e+00, 208 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 (400 simplex iterations) in 0.07 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 -- 24 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:50:03 2012 Optimize a model with 6205 rows, 1673 columns and 19488 nonzeros Presolve time: 0.02s Presolved: 6205 rows, 1673 columns, 19488 nonzeros Variable types: 0 continuous, 1673 integer (1673 binary) Root relaxation: objective 0.000000e+00, 201 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 (407 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:50:03 2012 Optimize a model with 3151 rows, 1091 columns and 9744 nonzeros Presolve time: 0.01s Presolved: 3151 rows, 1091 columns, 9744 nonzeros Variable types: 0 continuous, 1091 integer (1091 binary) Root relaxation: objective 0.000000e+00, 217 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 (829 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:50:03 2012 Optimize a model with 1624 rows, 800 columns and 4872 nonzeros Presolve time: 0.00s Presolved: 1624 rows, 800 columns, 4872 nonzeros Variable types: 0 continuous, 800 integer (800 binary) Root relaxation: objective 0.000000e+00, 211 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 0 154 - 0.00000 - - 0s 0 0 0.00000 0 190 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2697 simplex iterations) in 0.18 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:50:03 2012 Optimize a model with 2133 rows, 897 columns and 6496 nonzeros Presolve time: 0.01s Presolved: 2133 rows, 897 columns, 6496 nonzeros Variable types: 0 continuous, 897 integer (897 binary) Root relaxation: objective 0.000000e+00, 224 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 0 190 - 0.00000 - - 0s 0 0 0.00000 0 192 - 0.00000 - - 0s 0 0 0.00000 0 263 - 0.00000 - - 0s 0 0 0.00000 0 293 - 0.00000 - - 0s 0 0 0.00000 0 283 - 0.00000 - - 0s 0 0 0.00000 0 249 - 0.00000 - - 0s 0 0 0.00000 0 268 - 0.00000 - - 1s 0 0 0.00000 0 273 - 0.00000 - - 1s 0 0 0.00000 0 273 - 0.00000 - - 1s 0 2 0.00000 0 273 - 0.00000 - - 1s Cutting planes: Clique: 12 Zero half: 21 Explored 81 nodes (23455 simplex iterations) in 2.39 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 4 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:50:06 2012 Optimize a model with 2642 rows, 994 columns and 8120 nonzeros Presolve time: 0.01s Presolved: 2642 rows, 994 columns, 8120 nonzeros Variable types: 0 continuous, 994 integer (994 binary) Root relaxation: objective 0.000000e+00, 225 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 0 105 - 0.00000 - - 0s 0 0 0.00000 0 114 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (4370 simplex iterations) in 0.31 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: 5