NO Solver Timeout: 4 Global Timeout: 60 No parsing errors! Init Location: 0 Transitions: 0) /\ (arg2 > 0) /\ ((arg1 + arg2) < 100), par{arg1 -> arg2, arg2 -> arg1}> 17, arg2 -> 13}> undef5, arg2 -> undef6}> Fresh variables: undef5, undef6, Undef variables: undef5, undef6, Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: 0) /\ (arg2 > 0) /\ ((arg1 + arg2) < 100), 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 ) ( 1 , 1 ) ******************************************************************************************* ******************************** CHECKING ASSERTIONS ******************************** ******************************************************************************************* Proving termination of subgraph 0 Proving termination of subgraph 1 Checking unfeasibility... Time used: 0.139144 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000869s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002316s Trying to remove transition: arg2, arg2 -> arg1, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.012028s Time used: 0.011882 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.060322s Time used: 0.060005 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.001995s Time used: 4.00037 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.005184s Time used: 1.00036 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.630086s Time used: 0.626755 Termination failed. Trying to show unreachability... Proving unreachability of entry: LOG: CALL check - Post:1 <= 0 - Process 1 * Exit transition: * Postcondition : 1 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002070s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.002176s Cannot prove unreachability Proving non-termination of subgraph 1 Transitions: arg2, arg2 -> arg1, rest remain the same}> Variables: arg1, arg2 Checking conditional non-termination of SCC {l1}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.009257s Time used: 0.009056 Improving Solution with cost 3 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.019528s Time used: 0.019522 LOG: SAT solveNonLinear - Elapsed time: 0.028785s Cost: 3; Total time: 0.028578 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l1: 1 <= arg2 Strengthening and disabling EXIT transitions... Closed exits from l1: 2 Strengthening exit transition (result): 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 {l1}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.005632s Time used: 0.005443 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.009627s Time used: 0.009624 LOG: SAT solveNonLinear - Elapsed time: 0.015259s Cost: 1; Total time: 0.015067 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l1: 1 <= arg1 Strengthening and disabling EXIT transitions... Closed exits from l1: 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 {l1}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.015827s Time used: 0.015717 LOG: SAT solveNonLinear - Elapsed time: 0.015827s Cost: 0; Total time: 0.015717 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l1: arg1 + arg2 <= 30 Strengthening and disabling EXIT transitions... Closed exits from l1: 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 <= arg2, 1 <= arg1, arg1 + arg2 <= 30, OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: 1 <= arg1, 1 <= arg2, arg1 + arg2 <= 30, OPEN EXITS: > Conditions are reachable! Program does NOT terminate