current bounds on the number of colors: 0 -- 146 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:18 2012 Optimize a model with 8687 rows, 10775 columns and 36281 nonzeros Presolve removed 30 rows and 2190 columns Presolve time: 0.11s Presolved: 8657 rows, 8585 columns, 34091 nonzeros Variable types: 0 continuous, 8585 integer (8585 binary) Root relaxation: objective 0.000000e+00, 200 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 (200 simplex iterations) in 0.11 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 -- 73 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:18 2012 Optimize a model with 4358 rows, 5373 columns and 17892 nonzeros Presolve removed 30 rows and 1080 columns Presolve time: 0.03s Presolved: 4328 rows, 4293 columns, 16812 nonzeros Variable types: 0 continuous, 4293 integer (4293 binary) Root relaxation: objective 0.000000e+00, 199 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 (199 simplex iterations) in 0.04 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 -- 36 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:18 2012 Optimize a model with 2252 rows, 2745 columns and 8946 nonzeros Presolve removed 30 rows and 540 columns Presolve time: 0.01s Presolved: 2222 rows, 2205 columns, 8406 nonzeros Variable types: 0 continuous, 2205 integer (2205 binary) Root relaxation: objective 0.000000e+00, 200 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 (200 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 -- 18 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:18 2012 Optimize a model with 1199 rows, 1431 columns and 4473 nonzeros Presolve removed 30 rows and 270 columns Presolve time: 0.00s Presolved: 1169 rows, 1161 columns, 4203 nonzeros Variable types: 0 continuous, 1161 integer (1161 binary) Root relaxation: objective 0.000000e+00, 201 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 (201 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 -- 9 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:18 2012 Optimize a model with 614 rows, 701 columns and 1988 nonzeros Presolve removed 30 rows and 120 columns Presolve time: 0.00s Presolved: 584 rows, 581 columns, 1868 nonzeros Variable types: 0 continuous, 581 integer (581 binary) Root relaxation: objective 0.000000e+00, 183 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 (183 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 16:19:18 2012 Optimize a model with 380 rows, 409 columns and 994 nonzeros Presolve removed 154 rows and 188 columns Presolve time: 0.00s Presolved: 226 rows, 221 columns, 678 nonzeros Variable types: 0 continuous, 221 integer (221 binary) Root relaxation: objective 0.000000e+00, 115 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 0 101 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (361 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 16:19:18 2012 Optimize a model with 497 rows, 555 columns and 1491 nonzeros Presolve removed 30 rows and 90 columns Presolve time: 0.00s Presolved: 467 rows, 465 columns, 1401 nonzeros Variable types: 0 continuous, 465 integer (465 binary) Root relaxation: objective 0.000000e+00, 167 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 (167 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