NO Solver Timeout: 4 Global Timeout: 60 No parsing errors! Init Location: 0 Transitions: 0) /\ (arg2 > ~(1)), par{arg1 -> arg2, arg2 -> undef2}> (arg1 - 1), arg2 -> undef4}> 0), par{arg1 -> (arg1 + 1), arg2 -> undef6}> undef7, arg2 -> undef8}> Fresh variables: undef2, undef4, undef6, undef7, undef8, Undef variables: undef2, undef4, undef6, undef7, undef8, Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: 0) /\ (undef8 > ~(1))> (arg1 - 1)}> 0), par{arg1 -> (arg1 + 1)}> Fresh variables: undef2, undef4, undef6, undef7, undef8, Undef variables: undef2, undef4, undef6, undef7, undef8, Abstraction variables: Exit nodes: Accepting locations: Asserts: ************************************************************* ******************************************************************************************* *********************** WORKING TRANSITION SYSTEM (DAG) *********************** ******************************************************************************************* Init Location: 0 Graph 0: Transitions: Variables: Graph 1: Transitions: -1 + arg1, rest remain the same}> 1 + arg1, rest remain the same}> Variables: arg1 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: 0.002673 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000894s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002535s Trying to remove transition: 1 + arg1, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.005240s Time used: 0.005073 Trying to remove transition: -1 + arg1, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.004278s Time used: 0.004007 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.010581s Time used: 0.010213 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.049844s Time used: 0.049836 LOG: SAT solveNonLinear - Elapsed time: 0.060425s Cost: 1; Total time: 0.060049 Failed at location 2: 1 <= arg1 Before Improving: Quasi-invariant at l2: 1 <= arg1 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.004067s Remaining time after improvement: 0.998472 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 <= arg1 [ 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: -1 + arg1, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 1 + arg1, rest remain the same}> [ Termination Graph ] Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: -1 + arg1, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 1 + arg1, rest remain the same}> New Graphs: Transitions: 1 + arg1, rest remain the same}> Variables: arg1 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000508s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001323s Trying to remove transition: 1 + arg1, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003477s Time used: 0.003354 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.001234s Time used: 4.00087 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.010279s Time used: 4.00077 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.005583s Time used: 1.00057 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.008133s Time used: 0.005289 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.012392s Time used: 0.012387 LOG: SAT solveNonLinear - Elapsed time: 0.020526s Cost: 1; Total time: 0.017676 Quasi-ranking function: 50000 - arg1 New Graphs: Transitions: 1 + arg1, rest remain the same}> Variables: arg1 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000399s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001236s Trying to remove transition: 1 + arg1, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003630s Time used: 0.003503 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.001774s Time used: 4.00138 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.013581s Time used: 4.00134 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.006181s Time used: 1.00082 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.007959s Time used: 0.004615 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: 0.000890s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000987s Cannot prove unreachability Proving non-termination of subgraph 1 Transitions: -1 + arg1, rest remain the same}> 1 + arg1, rest remain the same}> Variables: arg1 Checking conditional non-termination of SCC {l2}... > No exit transition to close. Calling reachability with... Transition: Conditions: OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: OPEN EXITS: > Conditions are reachable! Program does NOT terminate