current bounds on the number of colors: 0 -- 141 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:36 2012 Optimize a model with 34091 rows, 10355 columns and 111720 nonzeros Presolve time: 0.14s Presolved: 34091 rows, 10355 columns, 111720 nonzeros Variable types: 0 continuous, 10355 integer (10355 binary) Root relaxation: objective 0.000000e+00, 484 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 (484 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 -- 70 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:37 2012 Optimize a model with 17116 rows, 5420 columns and 55860 nonzeros Presolve time: 0.09s Presolved: 17116 rows, 5420 columns, 55860 nonzeros Variable types: 0 continuous, 5420 integer (5420 binary) Root relaxation: objective 0.000000e+00, 400 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 (692 simplex iterations) in 0.13 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 -- 35 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:40:37 2012 Optimize a model with 8386 rows, 2882 columns and 27132 nonzeros Presolve time: 0.03s Presolved: 8386 rows, 2882 columns, 27132 nonzeros Variable types: 0 continuous, 2882 integer (2882 binary) Root relaxation: objective 0.000000e+00, 325 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 (575 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 18:40:37 2012 Optimize a model with 4021 rows, 1613 columns and 12768 nonzeros Presolve time: 0.01s Presolved: 4021 rows, 1613 columns, 12768 nonzeros Variable types: 0 continuous, 1613 integer (1613 binary) Root relaxation: objective 0.000000e+00, 299 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 (556 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 18:40:37 2012 Optimize a model with 2081 rows, 1049 columns and 6384 nonzeros Presolve time: 0.01s Presolved: 2081 rows, 1049 columns, 6384 nonzeros Variable types: 0 continuous, 1049 integer (1049 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 0 165 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 3 Clique: 6 Zero half: 84 Explored 0 nodes (2652 simplex iterations) in 0.14 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 18:40:37 2012 Optimize a model with 1111 rows, 767 columns and 3192 nonzeros Presolve removed 141 rows and 141 columns Presolve time: 0.00s Presolved: 970 rows, 626 columns, 2910 nonzeros Variable types: 0 continuous, 626 integer (626 binary) Root relaxation: objective 0.000000e+00, 145 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 0 141 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (585 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 18:40:37 2012 Optimize a model with 1596 rows, 908 columns and 4788 nonzeros Presolve time: 0.00s Presolved: 1596 rows, 908 columns, 4788 nonzeros Variable types: 0 continuous, 908 integer (908 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 0 270 - 0.00000 - - 0s 0 0 0.00000 0 274 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 0s 0 0 0.00000 0 372 - 0.00000 - - 0s 0 0 0.00000 0 256 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 0.00000 0 263 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 1s 0 0 0.00000 0 296 - 0.00000 - - 1s 0 0 0.00000 0 293 - 0.00000 - - 1s 0 0 0.00000 0 299 - 0.00000 - - 1s 0 0 0.00000 0 298 - 0.00000 - - 1s 0 2 0.00000 0 276 - 0.00000 - - 1s Cutting planes: Zero half: 22 Explored 11 nodes (21668 simplex iterations) in 1.81 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