current bounds on the number of colors: 0 -- 38 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:58:59 2012 Optimize a model with 6403 rows, 1057 columns and 19817 nonzeros Presolve time: 0.02s Presolved: 6403 rows, 1057 columns, 19817 nonzeros Variable types: 0 continuous, 1057 integer (1057 binary) Root relaxation: objective 0.000000e+00, 88 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 (240 simplex iterations) in 0.04 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 -- 19 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:59:00 2012 Optimize a model with 3053 rows, 677 columns and 9387 nonzeros Presolve time: 0.01s Presolved: 3053 rows, 677 columns, 9387 nonzeros Variable types: 0 continuous, 677 integer (677 binary) Root relaxation: objective 0.000000e+00, 90 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 16 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (507 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 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:59:00 2012 Optimize a model with 1378 rows, 487 columns and 4172 nonzeros Presolve time: 0.00s Presolved: 1378 rows, 487 columns, 4172 nonzeros Variable types: 0 continuous, 487 integer (487 binary) Root relaxation: objective 0.000000e+00, 76 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 76 - 0.00000 - - 0s 0 0 0.00000 0 68 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1453 simplex iterations) in 0.15 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: 4 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:59:00 2012 Optimize a model with 2048 rows, 563 columns and 6258 nonzeros Presolve time: 0.01s Presolved: 2048 rows, 563 columns, 6258 nonzeros Variable types: 0 continuous, 563 integer (563 binary) Root relaxation: objective 0.000000e+00, 84 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 56 - 0.00000 - - 0s 0 0 0.00000 0 85 - 0.00000 - - 0s 0 0 0.00000 0 178 - 0.00000 - - 0s 0 0 0.00000 0 192 - 0.00000 - - 0s 0 0 0.00000 0 165 - 0.00000 - - 0s 0 0 0.00000 0 178 - 0.00000 - - 0s 0 0 0.00000 0 170 - 0.00000 - - 0s 0 0 0.00000 0 181 - 0.00000 - - 1s 0 0 0.00000 0 181 - 0.00000 - - 1s 0 2 0.00000 0 181 - 0.00000 - - 1s Cutting planes: Clique: 20 Zero half: 21 Explored 3 nodes (11946 simplex iterations) in 1.34 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: 6 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:59:01 2012 Optimize a model with 2383 rows, 601 columns and 7301 nonzeros Presolve time: 0.01s Presolved: 2383 rows, 601 columns, 7301 nonzeros Variable types: 0 continuous, 601 integer (601 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 0.00000 0 36 - 0.00000 - - 0s 0 0 0.00000 0 36 - 0.00000 - - 0s 0 0 0.00000 0 124 - 0.00000 - - 0s 0 0 0.00000 0 131 - 0.00000 - - 0s 0 0 0.00000 0 109 - 0.00000 - - 0s 0 0 0.00000 0 130 - 0.00000 - - 0s 0 0 0.00000 0 127 - 0.00000 - - 0s 0 0 0.00000 0 125 - 0.00000 - - 0s 0 0 0.00000 0 110 - 0.00000 - - 0s 0 0 0.00000 0 112 - 0.00000 - - 0s 0 0 0.00000 0 30 - 0.00000 - - 1s 0 0 0.00000 0 127 - 0.00000 - - 1s 0 0 0.00000 0 134 - 0.00000 - - 1s 0 0 0.00000 0 130 - 0.00000 - - 1s 0 2 0.00000 0 130 - 0.00000 - - 1s Cutting planes: Clique: 22 Zero half: 6 Explored 43 nodes (19920 simplex iterations) in 1.64 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: 7 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:59:03 2012 Optimize a model with 2718 rows, 639 columns and 8344 nonzeros Presolve time: 0.01s Presolved: 2718 rows, 639 columns, 8344 nonzeros Variable types: 0 continuous, 639 integer (639 binary) Root relaxation: objective 0.000000e+00, 78 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 26 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 1 Clique: 26 MIR: 18 Zero half: 24 Explored 0 nodes (809 simplex iterations) in 0.05 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: 8