NO Solver Timeout: 4 Global Timeout: 300 No parsing errors! Init Location: 0 Transitions: 0) /\ (arg2 > ~(1)), par{arg1 -> arg2, arg2 -> undef2}> 9), par{arg2 -> undef4}> 5) /\ (arg1 < 10), par{arg1 -> (arg1 - 1), arg2 -> undef6}> undef7, arg2 -> undef8}> Fresh variables: undef2, undef4, undef6, undef7, undef8, Undef variables: undef2, undef4, undef6, undef7, undef8, Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: 0) /\ (undef8 > ~(1))> 9)> 5) /\ (arg1 < 10), par{arg1 -> (arg1 - 1)}> Fresh variables: undef2, undef4, undef6, undef7, undef8, Undef variables: undef2, undef4, undef6, undef7, undef8, Abstraction variables: Exit nodes: Accepting locations: Asserts: ************************************************************* ******************************************************************************************* *********************** WORKING TRANSITION SYSTEM (DAG) *********************** ******************************************************************************************* Init Location: 0 Graph 0: Transitions: Variables: Graph 1: Transitions: -1 + arg1, rest remain the same}> Variables: arg1 Precedence: Graph 0 Graph 1 Map Locations to Subgraph: ( 0 , 0 ) ( 2 , 1 ) ******************************************************************************************* ******************************** CHECKING ASSERTIONS ******************************** ******************************************************************************************* Proving termination of subgraph 0 Proving termination of subgraph 1 Checking unfeasibility... Time used: 0.00261 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000658s Ranking function: -6 + arg1 New Graphs: Transitions: Variables: arg1 > No variable changes in termination graph. Checking conditional unfeasibility... Calling Safety with literal arg1 <= 9 and entry LOG: CALL check - Post:arg1 <= 9 - Process 1 * Exit transition: * Postcondition : arg1 <= 9 Quasi-invariants: Location 2: arg1 <= 9 ; Postcondition: arg1 <= 9 LOG: CALL check - Post:arg1 <= 9 - Process 2 * Exit transition: * Postcondition : arg1 <= 9 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000250s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000299s LOG: NarrowEntry size 1 Narrowing transition: LOG: Narrow transition size 1 It's unfeasible. Removing transition: -1 + arg1, rest remain the same}> ENTRIES: END ENTRIES: GRAPH: END GRAPH: EXIT: POST: arg1 <= 9 LOG: Try proving POST Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.005041s Time used: 0.004962 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.001019s Time used: 4.0008 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.009027s Time used: 1.00029 LOG: Postcondition is not implied - no solution > Postcondition is not implied! LOG: RETURN check - Elapsed time: 5.019002s Proving non-termination of subgraph 1 Transitions: -1 + arg1, rest remain the same}> Variables: arg1 Checking conditional non-termination of SCC {l2}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.005506s Time used: 0.005389 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.003272s Time used: 0.003271 LOG: SAT solveNonLinear - Elapsed time: 0.008778s Cost: 1; Total time: 0.00866 Failed at location 2: 10 <= arg1 Before Improving: Quasi-invariant at l2: 10 <= arg1 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000936s Remaining time after improvement: 0.999539 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 10 <= arg1 Strengthening and disabling EXIT transitions... Closed exits from l2: 1 Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: -1 + arg1, rest remain the same}> Calling reachability with... Transition: Conditions: 10 <= arg1, OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: 10 <= arg1, OPEN EXITS: > Conditions are reachable! Program does NOT terminate