current bounds on the number of colors: 0 -- 70 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:52 2012 Optimize a model with 1015 rows, 2477 columns and 5285 nonzeros Presolve removed 36 rows and 1260 columns Presolve time: 0.01s Presolved: 979 rows, 1217 columns, 4025 nonzeros Variable types: 0 continuous, 1217 integer (1217 binary) Root relaxation: objective 0.000000e+00, 57 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 (57 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 -- 35 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:52 2012 Optimize a model with 529 rows, 1217 columns and 2567 nonzeros Presolve removed 36 rows and 612 columns Presolve time: 0.00s Presolved: 493 rows, 605 columns, 1955 nonzeros Variable types: 0 continuous, 605 integer (605 binary) Root relaxation: objective 0.000000e+00, 57 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 (57 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 -- 17 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:52 2012 Optimize a model with 286 rows, 587 columns and 1208 nonzeros Presolve removed 36 rows and 288 columns Presolve time: 0.00s Presolved: 250 rows, 299 columns, 920 nonzeros Variable types: 0 continuous, 299 integer (299 binary) Root relaxation: objective 0.000000e+00, 53 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 (53 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 -- 8 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:52 2012 Optimize a model with 178 rows, 307 columns and 604 nonzeros Presolve removed 36 rows and 144 columns Presolve time: 0.00s Presolved: 142 rows, 163 columns, 460 nonzeros Variable types: 0 continuous, 163 integer (163 binary) Root relaxation: objective 0.000000e+00, 49 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 (49 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 Sat Dec 15 16:13:52 2012 Optimize a model with 124 rows, 167 columns and 302 nonzeros Presolve removed 78 rows and 118 columns Presolve time: 0.00s Presolved: 46 rows, 49 columns, 138 nonzeros Variable types: 0 continuous, 49 integer (49 binary) Root relaxation: objective 0.000000e+00, 22 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 14 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (79 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 Sat Dec 15 16:13:52 2012 Optimize a model with 151 rows, 237 columns and 453 nonzeros Presolve removed 36 rows and 108 columns Presolve time: 0.00s Presolved: 115 rows, 129 columns, 345 nonzeros Variable types: 0 continuous, 129 integer (129 binary) Root relaxation: objective 0.000000e+00, 48 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 (48 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