CMP.13:4.5 - Refine the lost distinction and continue from the affected computation

Locate where the reported execution or answer became impossible. Restore the distinction responsible: separate a merged state, retain a relation, distinguish a calling context, or make an abstract operation more precise. A false path through one merged class can suggest splitting its reachable dead ends from the states that supply its outgoing edge.

Recompute affected dependencies and reuse results whose inputs and interpretation remain valid. Confirm that the revised construction removes the particular spurious result and still covers all original behavior. Removing one false path may leave others.

Choose further refinement by what it can change in the receiving work. A coarse result that already answers the question is sufficient. A real counterexample changes the original construction or its allowed use; improving the analyzer cannot make that execution disappear. When refinement remains too costly or inconclusive, return the unresolved property and the condition under which another calculation or direct execution would help. C.11.DUA governs the worth of that additional work.