NO Solver Timeout: 4 Global Timeout: 60 No parsing errors! Init Location: 0 Transitions: 0) /\ (arg2 > ~(1)), par{arg1 -> arg2, arg2 -> undef2}> 2), par{arg1 -> (arg1 + 1), arg2 -> undef4}> undef5, arg2 -> undef6}> Fresh variables: undef2, undef4, undef5, undef6, Undef variables: undef2, undef4, undef5, undef6, Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: 0) /\ (undef6 > ~(1))> 2), par{arg1 -> (arg1 + 1)}> Fresh variables: undef2, undef4, undef5, undef6, Undef variables: undef2, undef4, undef5, undef6, 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}> 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: 0.001718 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000438s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001152s Trying to remove transition: 1 + arg1, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003640s Time used: 0.003518 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.005166s Time used: 0.004898 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.015008s Time used: 0.015003 LOG: SAT solveNonLinear - Elapsed time: 0.020174s Cost: 1; Total time: 0.019901 Failed at location 2: arg1 <= 0 Before Improving: Quasi-invariant at l2: arg1 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001790s Quasi-invariant improved LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000815s Remaining time after improvement: 0.998292 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: arg1 <= 2 [ 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}> [ 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}> New Graphs: Calling Safety with literal arg1 <= 2 and entry LOG: CALL check - Post:arg1 <= 2 - Process 1 * Exit transition: * Postcondition : arg1 <= 2 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000419s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000522s INVARIANTS: 2: Quasi-INVARIANTS to narrow Graph: 2: arg1 <= 2 , Narrowing transition: 1 + arg1, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: 1 + arg1, rest remain the same}> Variables: arg1 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000385s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001153s Trying to remove transition: 1 + arg1, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003282s Time used: 0.003151 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.000997s Time used: 4.00069 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.006414s Time used: 4.00072 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.005691s Time used: 1.00058 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.008418s Time used: 0.004735 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.011730s Time used: 0.011725 LOG: SAT solveNonLinear - Elapsed time: 0.020148s Cost: 1; Total time: 0.01646 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: 0.000397s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001235s Trying to remove transition: 1 + arg1, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003578s Time used: 0.003449 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.001298s Time used: 4.00102 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.006075s Time used: 4.00104 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.006535s Time used: 1.00091 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.008276s Time used: 0.005176 Proving non-termination of subgraph 1 Transitions: 1 + arg1, rest remain the same}> Variables: arg1 Checking conditional non-termination of SCC {l2}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.009480s Time used: 0.009317 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.004315s Time used: 0.00431 LOG: SAT solveNonLinear - Elapsed time: 0.013795s Cost: 1; Total time: 0.013627 Failed at location 2: 3 <= arg1 Before Improving: Quasi-invariant at l2: 3 <= arg1 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001312s Remaining time after improvement: 0.999249 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 3 <= arg1 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): 1 + arg1, rest remain the same}> Calling reachability with... Transition: Conditions: 3 <= arg1, OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: 3 <= arg1, OPEN EXITS: > Conditions are reachable! Program does NOT terminate