current bounds on the number of colors: 0 -- 114 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:03 2012 Optimize a model with 4275 rows, 6571 columns and 18981 nonzeros Presolve removed 26 rows and 1482 columns Presolve time: 0.05s Presolved: 4249 rows, 5089 columns, 17499 nonzeros Variable types: 0 continuous, 5089 integer (5089 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 (147 simplex iterations) in 0.06 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 -- 57 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:04 2012 Optimize a model with 2158 rows, 3265 columns and 9324 nonzeros Presolve removed 26 rows and 728 columns Presolve time: 0.02s Presolved: 2132 rows, 2537 columns, 8596 nonzeros Variable types: 0 continuous, 2537 integer (2537 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 (147 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 -- 28 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:04 2012 Optimize a model with 1136 rows, 1669 columns and 4662 nonzeros Presolve removed 26 rows and 364 columns Presolve time: 0.01s Presolved: 1110 rows, 1305 columns, 4298 nonzeros Variable types: 0 continuous, 1305 integer (1305 binary) Root relaxation: objective 0.000000e+00, 148 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 (148 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 -- 14 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:04 2012 Optimize a model with 625 rows, 871 columns and 2331 nonzeros Presolve removed 26 rows and 182 columns Presolve time: 0.00s Presolved: 599 rows, 689 columns, 2149 nonzeros Variable types: 0 continuous, 689 integer (689 binary) Root relaxation: objective 0.000000e+00, 140 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 (140 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 -- 7 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:04 2012 Optimize a model with 333 rows, 415 columns and 999 nonzeros Presolve removed 26 rows and 78 columns Presolve time: 0.00s Presolved: 307 rows, 337 columns, 921 nonzeros Variable types: 0 continuous, 337 integer (337 binary) Root relaxation: objective 0.000000e+00, 120 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 (120 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 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:04 2012 Optimize a model with 187 rows, 187 columns and 333 nonzeros Presolve removed 187 rows and 187 columns Presolve time: 0.00s Explored 0 nodes (0 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 1 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:04 2012 Optimize a model with 260 rows, 301 columns and 666 nonzeros Presolve removed 128 rows and 161 columns Presolve time: 0.00s Presolved: 132 rows, 140 columns, 396 nonzeros Variable types: 0 continuous, 140 integer (140 binary) Root relaxation: objective 0.000000e+00, 52 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 (52 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: 2