current bounds on the number of colors: 0 -- 46 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:46 2012 Optimize a model with 1495 rows, 1121 columns and 5405 nonzeros Presolve removed 5 rows and 115 columns Presolve time: 0.01s Presolved: 1490 rows, 1006 columns, 5290 nonzeros Variable types: 0 continuous, 1006 integer (1006 binary) Root relaxation: objective 0.000000e+00, 92 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 (152 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 -- 23 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:46 2012 Optimize a model with 739 rows, 569 columns and 2585 nonzeros Presolve removed 5 rows and 55 columns Presolve time: 0.00s Presolved: 734 rows, 514 columns, 2530 nonzeros Variable types: 0 continuous, 514 integer (514 binary) Root relaxation: objective 0.000000e+00, 74 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 (74 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 -- 11 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:46 2012 Optimize a model with 361 rows, 293 columns and 1175 nonzeros Presolve removed 5 rows and 25 columns Presolve time: 0.00s Presolved: 356 rows, 268 columns, 1150 nonzeros Variable types: 0 continuous, 268 integer (268 binary) Root relaxation: objective 0.000000e+00, 85 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 (132 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 Fri Dec 14 18:19:46 2012 Optimize a model with 172 rows, 155 columns and 470 nonzeros Presolve removed 46 rows and 51 columns Presolve time: 0.00s Presolved: 126 rows, 104 columns, 378 nonzeros Variable types: 0 continuous, 104 integer (104 binary) Root relaxation: objective 0.000000e+00, 44 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 41 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (161 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 Fri Dec 14 18:19:46 2012 Optimize a model with 235 rows, 201 columns and 705 nonzeros Presolve removed 5 rows and 15 columns Presolve time: 0.00s Presolved: 230 rows, 186 columns, 690 nonzeros Variable types: 0 continuous, 186 integer (186 binary) Root relaxation: objective 0.000000e+00, 88 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 (138 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