current bounds on the number of colors: 0 -- 52 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:23:15 2012 Optimize a model with 17290 rows, 2015 columns and 53066 nonzeros Presolve time: 0.07s Presolved: 17290 rows, 2015 columns, 53066 nonzeros Variable types: 0 continuous, 2015 integer (2015 binary) Root relaxation: objective 0.000000e+00, 131 iterations, 0.02 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 (315 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 -- 26 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:23:15 2012 Optimize a model with 8671 rows, 1339 columns and 26533 nonzeros Presolve time: 0.03s Presolved: 8671 rows, 1339 columns, 26533 nonzeros Variable types: 0 continuous, 1339 integer (1339 binary) Root relaxation: objective 0.000000e+00, 111 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 40 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (725 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:23:15 2012 Optimize a model with 4030 rows, 975 columns and 12246 nonzeros Presolve time: 0.01s Presolved: 4030 rows, 975 columns, 12246 nonzeros Variable types: 0 continuous, 975 integer (975 binary) Root relaxation: objective 0.000000e+00, 107 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 68 - 0.00000 - - 0s 0 0 0.00000 0 60 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2312 simplex iterations) in 0.32 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: 6 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:23:16 2012 Optimize a model with 6019 rows, 1131 columns and 18369 nonzeros Presolve time: 0.02s Presolved: 6019 rows, 1131 columns, 18369 nonzeros Variable types: 0 continuous, 1131 integer (1131 binary) Root relaxation: objective 0.000000e+00, 111 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 40 - 0.00000 - - 0s 0 0 0.00000 0 45 - 0.00000 - - 0s 0 0 0.00000 0 142 - 0.00000 - - 0s 0 0 0.00000 0 207 - 0.00000 - - 1s 0 0 0.00000 0 128 - 0.00000 - - 1s 0 0 0.00000 0 199 - 0.00000 - - 2s 0 0 0.00000 0 222 - 0.00000 - - 2s 0 0 0.00000 0 187 - 0.00000 - - 3s 0 0 0.00000 0 128 - 0.00000 - - 4s 0 0 0.00000 0 137 - 0.00000 - - 4s 0 0 0.00000 0 137 - 0.00000 - - 5s 0 2 0.00000 0 137 - 0.00000 - - 5s 338 6 0.00000 8 149 - 0.00000 - 142 10s Cutting planes: Clique: 147 Zero half: 3 Explored 709 nodes (134920 simplex iterations) in 14.61 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 9 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:23:31 2012 Optimize a model with 7345 rows, 1235 columns and 22451 nonzeros Presolve time: 0.02s Presolved: 7345 rows, 1235 columns, 22451 nonzeros Variable types: 0 continuous, 1235 integer (1235 binary) Root relaxation: objective 0.000000e+00, 117 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 22 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1419 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: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:23:31 2012 Optimize a model with 6682 rows, 1183 columns and 20410 nonzeros Presolve time: 0.02s Presolved: 6682 rows, 1183 columns, 20410 nonzeros Variable types: 0 continuous, 1183 integer (1183 binary) Root relaxation: objective 0.000000e+00, 112 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 40 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 1 Clique: 34 MIR: 3 Zero half: 43 Explored 0 nodes (1720 simplex iterations) in 0.15 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: 10