“…Second, Yu (2016a) proposed that we can dynamically allocate a dummy non-sharing waiting resource (denoted by deadlock thread holder, DTH) based on which location DTH allocated will increase maximum reachability to avoid deadlock, where the location can be calculated real-time by CFS. Final but not the last, Yu (2017) showed that lower modified deficient reachability ratio (DRO)(the number of reachable states under deficient intial tokens/ the number of reachable states) has a better margin effect of reachability, we can set up a dynamic initial token allocation mechanism for a multi-independent insufficient k-th order systems according to which system has the lowest DRO value. Chao et al have constructed CFS for k-th order/k-net system with a non-sharing resource r * in different locations (Chao & Yu, 2013, 2015a, 2016Chao, Yu, & Chen, 2014;Chao, Yu, & Lin, 2014;Chao, Yu, & Liou, 2014;Chao, Yu, & Wu, 2014; by siphon analysis method, respectively.…”