NO Solver Timeout: 4 Global Timeout: 60 No parsing errors! Init Location: 0 Transitions: 13, arg2 -> 17}> 2) /\ (arg1 > 0) /\ (arg2 > arg1), par{arg1 -> 2, arg2 -> (arg1 + 1)}> undef5, arg2 -> undef6}> Fresh variables: undef5, undef6, Undef variables: undef5, undef6, Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: 2) /\ (arg1 > 0) /\ (arg2 > arg1), par{arg1 -> 2, arg2 -> (arg1 + 1)}> 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: 2, arg2 -> 1 + 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: 0.036128 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000949s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002125s Trying to remove transition: 2, arg2 -> 1 + arg1, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.120089s Time used: 0.119926 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.519631s Time used: 0.519035 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.002245s Time used: 4.00032 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.021586s Time used: 1.01667 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.567338s Time used: 0.562466 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: 0.004132s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.004265s Cannot prove unreachability Proving non-termination of subgraph 1 Transitions: 2, arg2 -> 1 + 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: 0.018488s Time used: 0.018272 Improving Solution with cost 3 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.021656s Time used: 0.021649 Improving Solution with cost 2 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.029435s Time used: 0.029427 LOG: SAT solveNonLinear - Elapsed time: 0.069580s Cost: 2; Total time: 0.069348 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 2 <= arg1 Strengthening and disabling EXIT transitions... Closed exits from l2: 3 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): 2, arg2 -> 1 + 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: 0.005038s Time used: 0.004935 LOG: SAT solveNonLinear - Elapsed time: 0.005038s Cost: 0; Total time: 0.004935 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 + arg1 <= 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): 2, arg2 -> 1 + arg1, rest remain the same}> Calling reachability with... Transition: Conditions: 2 <= arg1, 1 + arg1 <= arg2, OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: 2 <= arg1, 1 + arg1 <= arg2, OPEN EXITS: > Conditions are reachable! Program does NOT terminate