NO Solver Timeout: 4 Global Timeout: 60 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: 0.007325 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000664s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001671s 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: 0.005849s Time used: 0.005717 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.078348s Time used: 0.077963 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 3.895621s Time used: 3.89472 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.003318s Time used: 1.00016 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.076838s Time used: 0.06976 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: 0.001035s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.001137s 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: 0.007672s Time used: 0.007572 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.039579s Time used: 0.039016 Improving Solution with cost 2 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.051579s Time used: 0.051573 LOG: SAT solveNonLinear - Elapsed time: 0.091158s Cost: 0; Total time: 0.090589 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