NO Solver Timeout: 4 Global Timeout: 300 No parsing errors! Init Location: 0 Transitions: undef3}> (1 + undef7)}> (~(1) + undef12)}> Fresh variables: undef3, undef7, undef12, Undef variables: undef3, undef7, undef12, Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: (1 + undef7)}> (~(1) + undef12)}> Fresh variables: undef3, undef7, undef12, Undef variables: undef3, undef7, undef12, Abstraction variables: Exit nodes: Accepting locations: Asserts: ************************************************************* ******************************************************************************************* *********************** WORKING TRANSITION SYSTEM (DAG) *********************** ******************************************************************************************* Init Location: 0 Graph 0: Transitions: Variables: Graph 1: Transitions: 1 + undef7, rest remain the same}> -1 + undef12, rest remain the same}> Variables: x_5^0 Graph 2: Transitions: Variables: Precedence: Graph 0 Graph 1 Graph 2 Map Locations to Subgraph: ( 0 , 0 ) ( 2 , 1 ) ( 3 , 2 ) ******************************************************************************************* ******************************** CHECKING ASSERTIONS ******************************** ******************************************************************************************* Proving termination of subgraph 0 Proving termination of subgraph 1 Checking unfeasibility... Time used: 0.002077 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000821s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002329s Trying to remove transition: -1 + undef12, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003291s Time used: 0.003117 Trying to remove transition: 1 + undef7, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.002947s Time used: 0.002747 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.004846s Time used: 0.00465 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.013690s Time used: 0.013396 Improving Solution with cost 2 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.062728s Time used: 0.062726 LOG: SAT solveNonLinear - Elapsed time: 0.076418s Cost: 2; Total time: 0.076122 Failed at location 2: x_5^0 <= 0 Failed at location 2: 0 <= x_5^0 Before Improving: Quasi-invariant at l2: x_5^0 <= 0 Quasi-invariant at l2: 0 <= x_5^0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.005321s Remaining time after improvement: 0.99926 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: x_5^0 <= 0 Quasi-invariant at l2: 0 <= x_5^0 [ 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 + undef7, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: -1 + undef12, rest remain the same}> [ Termination Graph ] Strengthening and disabling transitions... > It's unfeasible. Removing transition: 1 + undef7, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: -1 + undef12, rest remain the same}> New Graphs: Calling Safety with literal x_5^0 <= 0 and entry LOG: CALL check - Post:x_5^0 <= 0 - Process 1 * Exit transition: * Postcondition : x_5^0 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000199s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000223s Calling Safety with literal 0 <= x_5^0 and entry LOG: CALL check - Post:0 <= x_5^0 - Process 2 * Exit transition: * Postcondition : 0 <= x_5^0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000181s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000203s INVARIANTS: 2: Quasi-INVARIANTS to narrow Graph: 2: x_5^0 <= 0 , 0 <= x_5^0 , Narrowing transition: 1 + undef7, rest remain the same}> LOG: Narrow transition size 2 Narrowing transition: -1 + undef12, rest remain the same}> LOG: Narrow transition size 2 invGraph after Narrowing: Transitions: 1 + undef7, rest remain the same}> -1 + undef12, rest remain the same}> Variables: x_5^0 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000403s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001150s Trying to remove transition: -1 + undef12, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.002154s Time used: 0.002077 Trying to remove transition: 1 + undef7, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.002142s Time used: 0.001996 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.004162s Time used: 0.004021 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.000770s Time used: 4.00045 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.024882s Time used: 1.00659 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.008754s Time used: 0.004535 Proving non-termination of subgraph 1 Transitions: 1 + undef7, rest remain the same}> -1 + undef12, rest remain the same}> Variables: x_5^0 Checking conditional non-termination of SCC {l2}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.004205s Time used: 0.004097 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.007814s Time used: 0.007812 LOG: SAT solveNonLinear - Elapsed time: 0.012018s Cost: 1; Total time: 0.011909 Failed at location 2: 1 <= x_5^0 Before Improving: Quasi-invariant at l2: 1 <= x_5^0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002525s Remaining time after improvement: 0.999476 Minimizing number of undef constraints... LOG: CALL solveNonLinear LOG: RETURN solveNonLinear - Elapsed time: 0.001079s Number of undef constraints reduced! Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 1 <= x_5^0 Constraint over undef 'x_5^0 <= 1 + undef7' in transition: 1 + undef7, rest remain the same}> 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 + undef7, rest remain the same}> LOG: CALL solverLinear in Graph for feasibility LOG: RETURN solveLinear in Graph for feasibility It's unfeasible. Removing transition: -1 + undef12, rest remain the same}> Calling reachability with... Transition: Conditions: 1 <= x_5^0, OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: 1 <= x_5^0, OPEN EXITS: > Conditions are reachable! Program does NOT terminate