x2 <= 18
**
NAME BOUNDEDVAR5
ROWS
N COST
L ROW1
L ROW2
G ROW3
COLUMNS
X1 COST -3 ROW1 2
X1 ROW2 3 ROW3 1
X2 COST -1 ROW1 1
X2 ROW2 1 ROW3 1
RHS
RHS1 ROW1 3 ROW2 12
RHS1 ROW3 5
BOUNDS
FR BND1 X1 0
MI BND1 X2 0
UP BND1 X2 18
ENDATA
The expected objective value from Gurobi is -1 below.
One of infinite optimal solutions from standard Simplex is below.
Y1: 0
Y2: 2
Y3: 11
Y4: 0
Y5: 0
Y6: 11
min(z):-1
X1=-2
X2=7
The expected objective value from Gurobi is -1 below. One of infinite optimal solutions from standard Simplex is below. Y1: 0 Y2: 2 Y3: 11 Y4: 0 Y5: 0 Y6: 11 min(z):-1 X1=-2 X2=7
But the actual solution of Clp is different as follow. Optimal - objective value 0.5 After Postsolve, objective 0.5, infeasibilities - dual 0 (0), primal 0 (0) Optimal objective 0.5 - 0 iterations time 0.002, Presolve 0.00 optimal Row 0, primal 4, dual -1.5 Row 1, primal 1, dual 0 Row 2, primal 9, dual 0.5 X1, primal 0, dual 4.5 X2, primal 2.5, dual 0 X3, primal 1.5, dual -1.66533e-16 optimal Row 0, primal 4, dual -1.5 Row 1, primal 1, dual 0 Row 2, primal 9, dual 0.5 X1, primal 0, dual 4.5 X2, primal 2.5, dual 0 X3, primal 1.5, dual -1.66533e-16