current bounds on the number of colors: 0 -- 68 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:37:47 2012 Optimize a model with 8330 rows, 2555 columns and 27098 nonzeros Presolve time: 0.04s Presolved: 8330 rows, 2555 columns, 27098 nonzeros Variable types: 0 continuous, 2555 integer (2555 binary) Root relaxation: objective 0.000000e+00, 175 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 (297 simplex iterations) in 0.06 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 -- 34 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:37:47 2012 Optimize a model with 4199 rows, 1399 columns and 13549 nonzeros Presolve time: 0.02s Presolved: 4199 rows, 1399 columns, 13549 nonzeros Variable types: 0 continuous, 1399 integer (1399 binary) Root relaxation: objective 0.000000e+00, 146 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 (255 simplex iterations) in 0.02 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 -- 17 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:37:47 2012 Optimize a model with 2012 rows, 787 columns and 6376 nonzeros Presolve time: 0.01s Presolved: 2012 rows, 787 columns, 6376 nonzeros Variable types: 0 continuous, 787 integer (787 binary) Root relaxation: objective 0.000000e+00, 143 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 -- 8 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:37:47 2012 Optimize a model with 1040 rows, 515 columns and 3188 nonzeros Presolve time: 0.00s Presolved: 1040 rows, 515 columns, 3188 nonzeros Variable types: 0 continuous, 515 integer (515 binary) Root relaxation: objective 0.000000e+00, 152 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 0 120 - 0.00000 - - 0s 0 0 0.00000 0 140 - 0.00000 - - 0s 0 0 0.00000 0 115 - 0.00000 - - 0s 0 0 0.00000 0 111 - 0.00000 - - 0s 0 0 0.00000 0 106 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Clique: 2 Zero half: 8 Explored 0 nodes (2570 simplex iterations) in 0.12 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 -- 4 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:37:47 2012 Optimize a model with 554 rows, 379 columns and 1594 nonzeros Presolve removed 68 rows and 68 columns Presolve time: 0.00s Presolved: 486 rows, 311 columns, 1458 nonzeros Variable types: 0 continuous, 311 integer (311 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 68 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (292 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 -- 4 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:37:47 2012 Optimize a model with 797 rows, 447 columns and 2391 nonzeros Presolve time: 0.00s Presolved: 797 rows, 447 columns, 2391 nonzeros Variable types: 0 continuous, 447 integer (447 binary) Root relaxation: objective 0.000000e+00, 156 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 0 132 - 0.00000 - - 0s 0 0 0.00000 0 134 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1542 simplex iterations) in 0.08 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4