NO Solver Timeout: 4 Global Timeout: 60 No parsing errors! Init Location: 0 Transitions: (1 + (~(1) * x^0))}> Fresh variables: Undef variables: Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: (1 + (~(1) * x^0))}> Fresh variables: Undef variables: Abstraction variables: Exit nodes: Accepting locations: Asserts: ************************************************************* ******************************************************************************************* *********************** WORKING TRANSITION SYSTEM (DAG) *********************** ******************************************************************************************* Init Location: 0 Graph 0: Transitions: Variables: Graph 1: Transitions: 1 - x^0, rest remain the same}> Variables: x^0 Precedence: Graph 0 Graph 1 Map Locations to Subgraph: ( 0 , 0 ) ( 1 , 1 ) ******************************************************************************************* ******************************** CHECKING ASSERTIONS ******************************** ******************************************************************************************* Proving termination of subgraph 0 Proving termination of subgraph 1 Checking unfeasibility... Time used: 0.001479 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000488s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001478s Trying to remove transition: 1 - x^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003554s Time used: 0.003418 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.004154s Time used: 0.003901 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.011016s Time used: 0.011012 LOG: SAT solveNonLinear - Elapsed time: 0.015170s Cost: 1; Total time: 0.014913 Failed at location 1: 1 + x^0 <= 0 Before Improving: Quasi-invariant at l1: 1 + x^0 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001446s Remaining time after improvement: 0.999274 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l1: 1 + x^0 <= 0 [ 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 - x^0, 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 - x^0, rest remain the same}> New Graphs: Calling Safety with literal 1 + x^0 <= 0 and entry LOG: CALL check - Post:1 + x^0 <= 0 - Process 1 * Exit transition: * Postcondition : 1 + x^0 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000276s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000338s INVARIANTS: 1: Quasi-INVARIANTS to narrow Graph: 1: 1 + x^0 <= 0 , Narrowing transition: 1 - x^0, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: 1 - x^0, rest remain the same}> Variables: x^0 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000448s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001431s Trying to remove transition: 1 - x^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003210s Time used: 0.003079 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.008752s Time used: 0.008471 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.007315s Time used: 0.007311 LOG: SAT solveNonLinear - Elapsed time: 0.016066s Cost: 1; Total time: 0.015782 Failed at location 1: 2 <= x^0 Before Improving: Quasi-invariant at l1: 2 <= x^0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001498s Remaining time after improvement: 0.999243 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l1: 2 <= x^0 [ 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 - x^0, rest remain the same}> [ Termination Graph ] Strengthening and disabling transitions... > It's unfeasible. Removing transition: 1 - x^0, rest remain the same}> New Graphs: Calling Safety with literal 2 <= x^0 and entry LOG: CALL check - Post:2 <= x^0 - Process 2 * Exit transition: * Postcondition : 2 <= x^0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000324s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000392s INVARIANTS: 1: Quasi-INVARIANTS to narrow Graph: 1: 2 <= x^0 , Narrowing transition: 1 - x^0, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: 1 - x^0, rest remain the same}> Variables: x^0 Checking conditional termination of SCC {l1}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000447s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001417s Trying to remove transition: 1 - x^0, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003179s Time used: 0.003048 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003960s Time used: 0.003785 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.014575s Time used: 0.014391 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.050759s Time used: 0.050321 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.004632s Time used: 0.003462 Proving non-termination of subgraph 1 Transitions: 1 - x^0, rest remain the same}> Variables: x^0 Checking conditional non-termination of SCC {l1}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003868s Time used: 0.003718 Improving Solution with cost 2 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.005851s Time used: 0.005846 LOG: SAT solveNonLinear - Elapsed time: 0.009719s Cost: 2; Total time: 0.009564 Failed at location 1: x^0 <= 1 Before Improving: Quasi-invariant at l1: x^0 <= 1 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001236s Remaining time after improvement: 0.999243 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l1: x^0 <= 1 Strengthening and disabling EXIT transitions... Closed exits from l1: 1 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): 1 - x^0, rest remain the same}> Checking conditional non-termination of SCC {l1}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.002920s Time used: 0.002773 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.003624s Time used: 0.00362 LOG: SAT solveNonLinear - Elapsed time: 0.006544s Cost: 1; Total time: 0.006393 Failed at location 1: 0 <= x^0 Before Improving: Quasi-invariant at l1: 0 <= x^0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001088s Remaining time after improvement: 0.999304 Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l1: 0 <= x^0 Strengthening and disabling EXIT transitions... Closed exits from l1: 1 Strengthening and disabling transitions... LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility Strengthening transition (result): 1 - x^0, rest remain the same}> Calling reachability with... Transition: Conditions: x^0 <= 1, 0 <= x^0, OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: 0 <= x^0, x^0 <= 1, OPEN EXITS: > Conditions are reachable! Program does NOT terminate