NO Solver Timeout: 4 Global Timeout: 300 No parsing errors! Init Location: 0 Transitions: 1, arg2 -> 2, arg3 -> 3}> (((arg1 - arg2) + arg2) - (arg1 - arg2)), arg2 -> ((arg1 - arg2) + arg2), arg3 -> ((((arg1 - arg2) + arg2) - (arg1 - arg2)) + ((arg1 - arg2) + arg2))}> undef7, arg2 -> undef8, arg3 -> undef9}> Fresh variables: undef7, undef8, undef9, Undef variables: undef7, undef8, undef9, Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: (((arg1 - arg2) + arg2) - (arg1 - arg2)), arg2 -> ((arg1 - arg2) + arg2), arg3 -> ((((arg1 - arg2) + arg2) - (arg1 - arg2)) + ((arg1 - arg2) + arg2))}> Fresh variables: undef7, undef8, undef9, Undef variables: undef7, undef8, undef9, Abstraction variables: Exit nodes: Accepting locations: Asserts: ************************************************************* ******************************************************************************************* *********************** WORKING TRANSITION SYSTEM (DAG) *********************** ******************************************************************************************* Init Location: 0 Graph 0: Transitions: Variables: Graph 1: Transitions: arg2, arg2 -> arg1, arg3 -> arg1 + arg2, rest remain the same}> Variables: arg1, arg2, arg3 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: 0.006719 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000640s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001071s Trying to remove transition: arg2, arg2 -> arg1, arg3 -> arg1 + arg2, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003540s Time used: 0.003441 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.038107s Time used: 0.037828 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.810693s Time used: 1.81038 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.001766s Time used: 1.00013 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.034593s Time used: 0.032515 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: 0.000530s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000570s Cannot prove unreachability Proving non-termination of subgraph 1 Transitions: arg2, arg2 -> arg1, arg3 -> arg1 + arg2, rest remain the same}> Variables: arg1, arg2, arg3 Checking conditional non-termination of SCC {l2}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003573s Time used: 0.003502 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.018614s Time used: 0.0183 Improving Solution with cost 2 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.022671s Time used: 0.022668 LOG: SAT solveNonLinear - Elapsed time: 0.041285s Cost: 0; Total time: 0.040968 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: arg1 + arg2 <= 3 Quasi-invariant at l2: arg3 <= 3 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, arg3 -> arg1 + arg2, rest remain the same}> Calling reachability with... Transition: Conditions: arg1 + arg2 <= 3, arg3 <= 3, OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: arg1 + arg2 <= 3, arg3 <= 3, OPEN EXITS: > Conditions are reachable! Program does NOT terminate