current bounds on the number of colors: 0 -- 174 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:54 2012 Optimize a model with 13485 rows, 15291 columns and 55071 nonzeros Presolve removed 31 rows and 2697 columns Presolve time: 0.11s Presolved: 13454 rows, 12594 columns, 52374 nonzeros Variable types: 0 continuous, 12594 integer (12594 binary) Root relaxation: objective 0.000000e+00, 258 iterations, 0.01 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 (258 simplex iterations) in 0.12 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 -- 87 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:54 2012 Optimize a model with 6753 rows, 7635 columns and 27219 nonzeros Presolve removed 31 rows and 1333 columns Presolve time: 0.06s Presolved: 6722 rows, 6302 columns, 25886 nonzeros Variable types: 0 continuous, 6302 integer (6302 binary) Root relaxation: objective 0.000000e+00, 254 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 (254 simplex iterations) in 0.07 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 -- 43 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:54 2012 Optimize a model with 3387 rows, 3807 columns and 13293 nonzeros Presolve removed 31 rows and 651 columns Presolve time: 0.02s Presolved: 3356 rows, 3156 columns, 12642 nonzeros Variable types: 0 continuous, 3156 integer (3156 binary) Root relaxation: objective 0.000000e+00, 255 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 (255 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 -- 21 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:54 2012 Optimize a model with 1704 rows, 1893 columns and 6330 nonzeros Presolve removed 31 rows and 310 columns Presolve time: 0.01s Presolved: 1673 rows, 1583 columns, 6020 nonzeros Variable types: 0 continuous, 1583 integer (1583 binary) Root relaxation: objective 0.000000e+00, 257 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 (371 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 -- 10 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:54 2012 Optimize a model with 939 rows, 1023 columns and 3165 nonzeros Presolve removed 31 rows and 155 columns Presolve time: 0.00s Presolved: 908 rows, 868 columns, 3010 nonzeros Variable types: 0 continuous, 868 integer (868 binary) Root relaxation: objective 0.000000e+00, 226 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 (226 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:54 2012 Optimize a model with 480 rows, 501 columns and 1266 nonzeros Presolve removed 184 rows and 220 columns Presolve time: 0.00s Presolved: 296 rows, 281 columns, 888 nonzeros Variable types: 0 continuous, 281 integer (281 binary) Root relaxation: objective 0.000000e+00, 146 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 0 128 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (477 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:23:54 2012 Optimize a model with 633 rows, 675 columns and 1899 nonzeros Presolve removed 31 rows and 93 columns Presolve time: 0.00s Presolved: 602 rows, 582 columns, 1806 nonzeros Variable types: 0 continuous, 582 integer (582 binary) Root relaxation: objective 0.000000e+00, 248 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 (248 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