current bounds on the number of colors: 0 -- 39 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:52 2012 Optimize a model with 1293 rows, 807 columns and 4503 nonzeros Presolve removed 4 rows and 76 columns Presolve time: 0.01s Presolved: 1289 rows, 731 columns, 4427 nonzeros Variable types: 0 continuous, 731 integer (731 binary) Root relaxation: objective 0.000000e+00, 82 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 (82 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 -- 19 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:52 2012 Optimize a model with 633 rows, 417 columns and 2133 nonzeros Presolve removed 4 rows and 36 columns Presolve time: 0.00s Presolved: 629 rows, 381 columns, 2097 nonzeros Variable types: 0 continuous, 381 integer (381 binary) Root relaxation: objective 0.000000e+00, 83 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 (132 simplex iterations) in 0.00 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 19:35:52 2012 Optimize a model with 303 rows, 222 columns and 948 nonzeros Presolve removed 4 rows and 16 columns Presolve time: 0.00s Presolved: 299 rows, 206 columns, 932 nonzeros Variable types: 0 continuous, 206 integer (206 binary) Root relaxation: objective 0.000000e+00, 80 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 (136 simplex iterations) in 0.00 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 19:35:52 2012 Optimize a model with 171 rows, 144 columns and 474 nonzeros Presolve removed 39 rows and 43 columns Presolve time: 0.00s Presolved: 132 rows, 101 columns, 396 nonzeros Variable types: 0 continuous, 101 integer (101 binary) Root relaxation: objective 0.000000e+00, 37 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 35 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (126 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 19:35:52 2012 Optimize a model with 237 rows, 183 columns and 711 nonzeros Presolve removed 4 rows and 12 columns Presolve time: 0.00s Presolved: 233 rows, 171 columns, 699 nonzeros Variable types: 0 continuous, 171 integer (171 binary) Root relaxation: objective 0.000000e+00, 77 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 24 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (245 simplex iterations) in 0.00 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: 3