current bounds on the number of colors: 0 -- 32 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:43 2012 Optimize a model with 848 rows, 563 columns and 2960 nonzeros Presolve removed 1 rows and 16 columns Presolve time: 0.00s Presolved: 847 rows, 547 columns, 2944 nonzeros Variable types: 0 continuous, 547 integer (547 binary) Root relaxation: objective 0.000000e+00, 63 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 (100 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 -- 16 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:43 2012 Optimize a model with 440 rows, 307 columns and 1480 nonzeros Presolve removed 1 rows and 8 columns Presolve time: 0.00s Presolved: 439 rows, 299 columns, 1472 nonzeros Variable types: 0 continuous, 299 integer (299 binary) Root relaxation: objective 0.000000e+00, 65 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 (65 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 Thu Dec 13 19:35:43 2012 Optimize a model with 236 rows, 179 columns and 740 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 235 rows, 175 columns, 736 nonzeros Variable types: 0 continuous, 175 integer (175 binary) Root relaxation: objective 0.000000e+00, 68 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 (96 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 Thu Dec 13 19:35:44 2012 Optimize a model with 134 rows, 115 columns and 370 nonzeros Presolve removed 32 rows and 33 columns Presolve time: 0.00s Presolved: 102 rows, 82 columns, 306 nonzeros Variable types: 0 continuous, 82 integer (82 binary) Root relaxation: objective 0.000000e+00, 34 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 31 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (107 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 Thu Dec 13 19:35:44 2012 Optimize a model with 185 rows, 147 columns and 555 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 184 rows, 144 columns, 552 nonzeros Variable types: 0 continuous, 144 integer (144 binary) Root relaxation: objective 0.000000e+00, 77 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 (130 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