current bounds on the number of colors: 0 -- 55 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:36:04 2012 Optimize a model with 19765 rows, 2215 columns and 60615 nonzeros Presolve time: 0.08s Presolved: 19765 rows, 2215 columns, 60615 nonzeros Variable types: 0 continuous, 2215 integer (2215 binary) Root relaxation: objective 0.000000e+00, 132 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 (455 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 -- 27 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:36:04 2012 Optimize a model with 9545 rows, 1445 columns and 29185 nonzeros Presolve time: 0.03s Presolved: 9545 rows, 1445 columns, 29185 nonzeros Variable types: 0 continuous, 1445 integer (1445 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (877 simplex iterations) in 0.09 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 18:36:04 2012 Optimize a model with 4435 rows, 1060 columns and 13470 nonzeros Presolve time: 0.01s Presolved: 4435 rows, 1060 columns, 13470 nonzeros Variable types: 0 continuous, 1060 integer (1060 binary) Root relaxation: objective 0.000000e+00, 110 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 74 - 0.00000 - - 0s 0 0 0.00000 0 68 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2845 simplex iterations) in 0.40 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 18:36:05 2012 Optimize a model with 6625 rows, 1225 columns and 20205 nonzeros Presolve time: 0.02s Presolved: 6625 rows, 1225 columns, 20205 nonzeros Variable types: 0 continuous, 1225 integer (1225 binary) Root relaxation: objective 0.000000e+00, 118 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 36 - 0.00000 - - 0s 0 0 0.00000 0 49 - 0.00000 - - 0s 0 0 0.00000 0 132 - 0.00000 - - 0s 0 0 0.00000 0 204 - 0.00000 - - 1s 0 0 0.00000 0 150 - 0.00000 - - 1s 0 0 0.00000 0 168 - 0.00000 - - 2s 0 0 0.00000 0 215 - 0.00000 - - 2s 0 0 0.00000 0 212 - 0.00000 - - 3s 0 0 0.00000 0 123 - 0.00000 - - 4s 0 0 0.00000 0 120 - 0.00000 - - 4s 0 0 0.00000 0 26 - 0.00000 - - 5s 0 0 0.00000 0 136 - 0.00000 - - 5s 0 0 0.00000 0 150 - 0.00000 - - 6s 0 0 0.00000 0 150 - 0.00000 - - 7s 0 2 0.00000 0 150 - 0.00000 - - 7s 121 28 0.00000 16 131 - 0.00000 - 174 10s 563 32 0.00000 15 144 - 0.00000 - 141 15s 899 31 0.00000 12 171 - 0.00000 - 149 20s 1255 31 0.00000 12 146 - 0.00000 - 150 25s 1611 17 infeasible 10 - 0.00000 - 151 30s 1953 11 0.00000 12 163 - 0.00000 - 152 35s Cutting planes: Clique: 195 Zero half: 7 Explored 2037 nodes (358773 simplex iterations) in 36.99 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 18:36:42 2012 Optimize a model with 8085 rows, 1335 columns and 24695 nonzeros Presolve time: 0.02s Presolved: 8085 rows, 1335 columns, 24695 nonzeros Variable types: 0 continuous, 1335 integer (1335 binary) Root relaxation: objective 0.000000e+00, 124 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 34 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1104 simplex iterations) in 0.10 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 18:36:42 2012 Optimize a model with 7355 rows, 1280 columns and 22450 nonzeros Presolve time: 0.02s Presolved: 7355 rows, 1280 columns, 22450 nonzeros Variable types: 0 continuous, 1280 integer (1280 binary) Root relaxation: objective 0.000000e+00, 121 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 36 - 0.00000 - - 0s 0 0 0.00000 0 75 - 0.00000 - - 0s 0 0 0.00000 0 52 - 0.00000 - - 0s 0 0 0.00000 0 183 - 0.00000 - - 0s 0 0 0.00000 0 66 - 0.00000 - - 1s 0 0 0.00000 0 65 - 0.00000 - - 1s 0 0 0.00000 0 58 - 0.00000 - - 2s 0 0 0.00000 0 114 - 0.00000 - - 2s 0 0 0.00000 0 134 - 0.00000 - - 3s 0 0 0.00000 0 116 - 0.00000 - - 4s 0 0 0.00000 0 75 - 0.00000 - - 4s 0 0 0.00000 0 20 - 0.00000 - - 5s 0 0 0.00000 0 142 - 0.00000 - - 5s 0 0 0.00000 0 70 - 0.00000 - - 6s 0 0 0.00000 0 117 - 0.00000 - - 6s 0 0 0.00000 0 117 - 0.00000 - - 7s 0 2 0.00000 0 117 - 0.00000 - - 7s H 24 3 0.0000000 0.00000 0.0% 107 9s Cutting planes: Clique: 15 Zero half: 4 Explored 24 nodes (49127 simplex iterations) in 9.07 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