NO Solver Timeout: 4 Global Timeout: 300 No parsing errors! Init Location: 0 Transitions: arg2) /\ (arg2 > ~(1)) /\ (arg1 > 0), par{arg1 -> (arg2 + 5)}> 0) /\ (arg2 > 0), par{arg1 -> arg2, arg2 -> arg1}> undef5, arg2 -> undef6}> Fresh variables: undef5, undef6, Undef variables: undef5, undef6, Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: undef6) /\ (undef6 > ~(1)) /\ (undef5 > 0)> 0) /\ (arg2 > 0), par{arg1 -> arg2, arg2 -> arg1}> Fresh variables: undef5, undef6, Undef variables: undef5, undef6, Abstraction variables: Exit nodes: Accepting locations: Asserts: ************************************************************* ******************************************************************************************* *********************** WORKING TRANSITION SYSTEM (DAG) *********************** ******************************************************************************************* Init Location: 0 Graph 0: Transitions: Variables: Graph 1: Transitions: arg2, arg2 -> arg1, rest remain the same}> Variables: arg1, arg2 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: 0.001336 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000329s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000979s Trying to remove transition: arg2, arg2 -> arg1, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003022s Time used: 0.00293 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003987s Time used: 0.003811 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.008296s Time used: 0.008295 LOG: SAT solveNonLinear - Elapsed time: 0.012283s Cost: 1; Total time: 0.012106 Failed at location 2: arg2 <= 0 Before Improving: Quasi-invariant at l2: arg2 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000986s Remaining time after improvement: 0.999546 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: arg2 <= 0 [ Invariant Graph ] Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: arg2, arg2 -> arg1, rest remain the same}> [ Termination Graph ] Strengthening and disabling transitions... > It's unfeasible. Removing transition: arg2, arg2 -> arg1, rest remain the same}> New Graphs: Calling Safety with literal arg2 <= 0 and entry LOG: CALL check - Post:arg2 <= 0 - Process 1 * Exit transition: * Postcondition : arg2 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000266s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000309s INVARIANTS: 2: Quasi-INVARIANTS to narrow Graph: 2: arg2 <= 0 , Narrowing transition: arg2, arg2 -> arg1, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: arg2, arg2 -> arg1, rest remain the same}> Variables: arg1, arg2 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000259s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000855s Trying to remove transition: arg2, arg2 -> arg1, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.002654s Time used: 0.00258 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.005410s Time used: 0.005269 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.000476s Time used: 4.00025 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.002404s Time used: 1.00004 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.007477s Time used: 0.003844 Proving non-termination of subgraph 1 Transitions: arg2, arg2 -> arg1, rest remain the same}> Variables: arg1, arg2 Checking conditional non-termination of SCC {l2}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.002608s Time used: 0.002498 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.002943s Time used: 0.002939 LOG: SAT solveNonLinear - Elapsed time: 0.005551s Cost: 1; Total time: 0.005437 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 <= arg1 Strengthening and disabling EXIT transitions... Closed exits from l2: 1 Strengthening exit transition (result): Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): arg2, arg2 -> arg1, rest remain the same}> Checking conditional non-termination of SCC {l2}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.002013s Time used: 0.001919 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.002752s Time used: 0.002749 LOG: SAT solveNonLinear - Elapsed time: 0.004765s Cost: 1; Total time: 0.004668 Failed at location 2: 1 <= arg2 Before Improving: Quasi-invariant at l2: 1 <= arg2 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000649s Remaining time after improvement: 0.999643 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 <= arg2 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): arg2, arg2 -> arg1, rest remain the same}> Calling reachability with... Transition: Conditions: 1 <= arg1, 1 <= arg2, OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: 1 <= arg1, 1 <= arg2, OPEN EXITS: > Conditions are reachable! Program does NOT terminate