NO Solver Timeout: 4 Global Timeout: 60 No parsing errors! Init Location: 0 Transitions: undef4}> undef7, x_5^0 -> undef8}> Fresh variables: undef4, undef7, undef8, Undef variables: undef4, undef7, undef8, Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: undef4}> undef8}> Fresh variables: undef4, undef7, undef8, Undef variables: undef4, undef7, undef8, Abstraction variables: Exit nodes: Accepting locations: Asserts: ************************************************************* ******************************************************************************************* *********************** WORKING TRANSITION SYSTEM (DAG) *********************** ******************************************************************************************* Init Location: 0 Graph 0: Transitions: Variables: Graph 1: Transitions: undef4, rest remain the same}> Variables: x_5^0 Graph 2: Transitions: Variables: Precedence: Graph 0 Graph 1 Graph 2 undef8, rest remain the same}> Map Locations to Subgraph: ( 0 , 0 ) ( 2 , 1 ) ( 4 , 2 ) ******************************************************************************************* ******************************** CHECKING ASSERTIONS ******************************** ******************************************************************************************* Proving termination of subgraph 0 Proving termination of subgraph 1 Checking unfeasibility... Time used: 0.001451 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000532s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001598s Trying to remove transition: undef4, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003613s Time used: 0.003452 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.009033s Time used: 0.008769 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.014592s Time used: 0.014587 LOG: SAT solveNonLinear - Elapsed time: 0.023624s Cost: 1; Total time: 0.023356 Failed at location 2: 2 <= x_5^0 Before Improving: Quasi-invariant at l2: 2 <= x_5^0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001599s Remaining time after improvement: 0.999218 Termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: 2 <= 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: undef4, rest remain the same}> [ Termination Graph ] Strengthening and disabling transitions... > It's unfeasible. Removing transition: undef4, rest remain the same}> New Graphs: Calling Safety with literal 2 <= x_5^0 and entry LOG: CALL check - Post:2 <= x_5^0 - Process 1 * Exit transition: * Postcondition : 2 <= x_5^0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000300s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000379s INVARIANTS: 2: Quasi-INVARIANTS to narrow Graph: 2: 2 <= x_5^0 , Narrowing transition: undef4, rest remain the same}> LOG: Narrow transition size 1 invGraph after Narrowing: Transitions: undef4, rest remain the same}> Variables: x_5^0 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000527s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001749s Trying to remove transition: undef4, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.003453s Time used: 0.003308 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.003695s Time used: 4.00112 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.005485s Time used: 4.00073 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.006017s Time used: 1.00051 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.008232s Time used: 0.004993 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.009379s Time used: 0.009343 LOG: SAT solveNonLinear - Elapsed time: 0.017611s Cost: 1; Total time: 0.014336 Quasi-ranking function: 50000 + x_5^0 New Graphs: Transitions: undef4, rest remain the same}> Variables: x_5^0 Checking conditional termination of SCC {l2}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000563s LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.002021s Trying to remove transition: undef4, rest remain the same}> Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.004127s Time used: 0.003973 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.009621s Time used: 4.00108 Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 4.026928s Time used: 4.00068 Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 1.005687s Time used: 1.00053 Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.007531s Time used: 0.004827 Proving non-termination of subgraph 1 Transitions: undef4, rest remain the same}> Variables: x_5^0 Checking that every undef value has an assignment... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000908s Checking conditional non-termination of SCC {l2}... EXIT TRANSITIONS: Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.012290s Time used: 0.012072 Improving Solution with cost 1 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.017451s Time used: 0.017444 LOG: SAT solveNonLinear - Elapsed time: 0.029741s Cost: 1; Total time: 0.029516 Failed at location 2: 1 + x_5^0 <= 0 Before Improving: Quasi-invariant at l2: 1 + x_5^0 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.006521s Quasi-invariant improved LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001375s Remaining time after improvement: 0.996566 Minimizing number of undef constraints... LOG: CALL solveNonLinear LOG: RETURN solveNonLinear - Elapsed time: 0.002164s Number of undef constraints reduced! Non-termination implied by a set of quasi-invariant(s): Quasi-invariant at l2: x_5^0 <= 0 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): undef4, rest remain the same}> Calling reachability with... Transition: Conditions: x_5^0 <= 0, OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: x_5^0 <= 0, OPEN EXITS: > Conditions are reachable! Program does NOT terminate