current bounds on the number of colors: 0 -- 39 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:37 2012 Optimize a model with 533 rows, 767 columns and 2223 nonzeros Presolve removed 9 rows and 171 columns Presolve time: 0.00s Presolved: 524 rows, 596 columns, 2052 nonzeros Variable types: 0 continuous, 596 integer (596 binary) Root relaxation: objective 0.000000e+00, 51 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 (73 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 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:37 2012 Optimize a model with 273 rows, 377 columns and 1053 nonzeros Presolve removed 9 rows and 81 columns Presolve time: 0.00s Presolved: 264 rows, 296 columns, 972 nonzeros Variable types: 0 continuous, 296 integer (296 binary) Root relaxation: objective 0.000000e+00, 54 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 (76 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 Fri Dec 14 18:19:37 2012 Optimize a model with 143 rows, 182 columns and 468 nonzeros Presolve removed 9 rows and 36 columns Presolve time: 0.00s Presolved: 134 rows, 146 columns, 432 nonzeros Variable types: 0 continuous, 146 integer (146 binary) Root relaxation: objective 0.000000e+00, 47 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 (47 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 Fri Dec 14 18:19:37 2012 Optimize a model with 91 rows, 104 columns and 234 nonzeros Presolve removed 41 rows and 51 columns Presolve time: 0.00s Presolved: 50 rows, 53 columns, 150 nonzeros Variable types: 0 continuous, 53 integer (53 binary) Root relaxation: objective 0.000000e+00, 21 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 4 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (54 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 Fri Dec 14 18:19:37 2012 Optimize a model with 117 rows, 143 columns and 351 nonzeros Presolve removed 9 rows and 27 columns Presolve time: 0.00s Presolved: 108 rows, 116 columns, 324 nonzeros Variable types: 0 continuous, 116 integer (116 binary) Root relaxation: objective 0.000000e+00, 47 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 (47 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