current bounds on the number of colors: 0 -- 65 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:37:30 2012 Optimize a model with 6145 rows, 2270 columns and 20320 nonzeros Presolve time: 0.03s Presolved: 6145 rows, 2270 columns, 20320 nonzeros Variable types: 0 continuous, 2270 integer (2270 binary) Root relaxation: objective 0.000000e+00, 170 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 (285 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 -- 32 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:37:30 2012 Optimize a model with 3105 rows, 1230 columns and 10160 nonzeros Presolve time: 0.01s Presolved: 3105 rows, 1230 columns, 10160 nonzeros Variable types: 0 continuous, 1230 integer (1230 binary) Root relaxation: objective 0.000000e+00, 147 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 (256 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 -- 16 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:37:30 2012 Optimize a model with 1585 rows, 710 columns and 5080 nonzeros Presolve time: 0.00s Presolved: 1585 rows, 710 columns, 5080 nonzeros Variable types: 0 continuous, 710 integer (710 binary) Root relaxation: objective 0.000000e+00, 134 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 (256 simplex iterations) in 0.01 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 Thu Dec 13 19:37:30 2012 Optimize a model with 825 rows, 450 columns and 2540 nonzeros Presolve time: 0.00s Presolved: 825 rows, 450 columns, 2540 nonzeros Variable types: 0 continuous, 450 integer (450 binary) Root relaxation: objective 0.000000e+00, 152 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 49 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (710 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 -- 4 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:37:30 2012 Optimize a model with 445 rows, 320 columns and 1270 nonzeros Presolve removed 65 rows and 65 columns Presolve time: 0.00s Presolved: 380 rows, 255 columns, 1140 nonzeros Variable types: 0 continuous, 255 integer (255 binary) Root relaxation: objective 0.000000e+00, 68 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 65 - 0.00000 - - 0s Explored 0 nodes (263 simplex iterations) in 0.00 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 19:37:30 2012 Optimize a model with 635 rows, 385 columns and 1905 nonzeros Presolve time: 0.00s Presolved: 635 rows, 385 columns, 1905 nonzeros Variable types: 0 continuous, 385 integer (385 binary) Root relaxation: objective 0.000000e+00, 164 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 0 126 - 0.00000 - - 0s 0 0 0.00000 0 98 - 0.00000 - - 0s 0 0 0.00000 0 127 - 0.00000 - - 0s 0 0 0.00000 0 156 - 0.00000 - - 0s 0 0 0.00000 0 122 - 0.00000 - - 0s 0 0 0.00000 0 119 - 0.00000 - - 0s 0 0 0.00000 0 151 - 0.00000 - - 0s 0 0 0.00000 0 125 - 0.00000 - - 0s 0 0 0.00000 0 156 - 0.00000 - - 0s 0 0 0.00000 0 159 - 0.00000 - - 0s 0 0 0.00000 0 123 - 0.00000 - - 0s 0 2 0.00000 0 123 - 0.00000 - - 0s Cutting planes: Zero half: 7 Explored 3 nodes (5980 simplex iterations) in 0.32 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