-set bug_info [string range $bug_info [expr {[string first "\n" $bug_info] + 1}] [expr {[string last "\n" $bug_info] - 1}]]
-if {$bug_info != "No solutions!"} {
+set bug_info [string range $bug_info [expr {[string first "Infinite" $bug_info]}] [expr {[string first "distance" $bug_info] - 3}]]
+if {$bug_info != "Infinite number of extremas"} {