Use current force to check convergence. #32906

git-svn-id: https://svn.sourceforge.jp/svnroot/molds/trunk@1644 1136aad2-a195-0410-b898-f5ea1d11b9d8
Merge trunk into refactor_opt.  #32881

git-svn-id: https://svn.sourceforge.jp/svnroot/molds/branches/refactor_opt@1645 1136aad2-a195-0410-b898-f5ea1d11b9d8