current bounds on the number of colors: 0 -- 183 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:45 2012 Optimize a model with 17018 rows, 16838 columns and 67158 nonzeros Presolve removed 29 rows and 2639 columns Presolve time: 0.12s Presolved: 16989 rows, 14199 columns, 64519 nonzeros Variable types: 0 continuous, 14199 integer (14199 binary) Root relaxation: objective 0.000000e+00, 291 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 (291 simplex iterations) in 0.14 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 -- 91 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:45 2012 Optimize a model with 8508 rows, 8420 columns and 33210 nonzeros Presolve removed 29 rows and 1305 columns Presolve time: 0.07s Presolved: 8479 rows, 7115 columns, 31905 nonzeros Variable types: 0 continuous, 7115 integer (7115 binary) Root relaxation: objective 0.000000e+00, 293 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 (293 simplex iterations) in 0.08 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 -- 45 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:46 2012 Optimize a model with 4253 rows, 4211 columns and 16236 nonzeros Presolve removed 29 rows and 638 columns Presolve time: 0.02s Presolved: 4224 rows, 3573 columns, 15598 nonzeros Variable types: 0 continuous, 3573 integer (3573 binary) Root relaxation: objective 0.000000e+00, 293 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 (293 simplex iterations) in 0.03 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 -- 22 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:46 2012 Optimize a model with 2218 rows, 2198 columns and 8118 nonzeros Presolve removed 29 rows and 319 columns Presolve time: 0.01s Presolved: 2189 rows, 1879 columns, 7799 nonzeros Variable types: 0 continuous, 1879 integer (1879 binary) Root relaxation: objective 0.000000e+00, 277 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 (277 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 -- 11 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:46 2012 Optimize a model with 1108 rows, 1100 columns and 3690 nonzeros Presolve removed 29 rows and 145 columns Presolve time: 0.00s Presolved: 1079 rows, 955 columns, 3545 nonzeros Variable types: 0 continuous, 955 integer (955 binary) Root relaxation: objective 0.000000e+00, 256 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 (256 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:46 2012 Optimize a model with 553 rows, 551 columns and 1476 nonzeros Presolve removed 187 rows and 218 columns Presolve time: 0.00s Presolved: 366 rows, 333 columns, 1098 nonzeros Variable types: 0 continuous, 333 integer (333 binary) Root relaxation: objective 0.000000e+00, 177 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 0 150 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (486 simplex iterations) in 0.01 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 16:25:46 2012 Optimize a model with 738 rows, 734 columns and 2214 nonzeros Presolve removed 29 rows and 87 columns Presolve time: 0.00s Presolved: 709 rows, 647 columns, 2127 nonzeros Variable types: 0 continuous, 647 integer (647 binary) Root relaxation: objective 0.000000e+00, 305 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 (425 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% optimal solution found: number of colors: 3