Algorithm 2: Pseudo-code of ISMA

Begin  Initialize of the parameters: $Max\_iter$, $N$  Initialize of slime mould population $X$  While $t\le Max\_iter$   Calculate the fitness for each individual in slime mould   Update $X_b$ and the best fitness   Calculate the weight $W$,a,b according to Equations (3)–(5)   For $i=1:N$    Update $p$ using Equation (2)    Update $vb$, $vc$ based on $a$ and $b$, respectively    Update the positions by Equation (1)   EndFor   Use Cauchy mutation strategy to update the best individual and the best fitness   Adopt MC strategy to update the best individual and the best fitness   iteration = iteration + 1  EndWhile  Return the best fitness and $X_b$ as the best solution End