NO Solver Timeout: 4 Global Timeout: 300 No parsing errors! Init Location: 0 Transitions: undef70}> (1 + i6^0), tmp___09^0 -> undef108}> 0, length5^0 -> (0 + undef111), s^0 -> undef111, tmp^0 -> undef113}> Fresh variables: undef70, undef108, undef111, undef113, Undef variables: undef70, undef108, undef111, undef113, Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: (1 + i6^0)}> Fresh variables: undef70, undef108, undef111, undef113, Undef variables: undef70, undef108, undef111, undef113, Abstraction variables: Exit nodes: Accepting locations: Asserts: ************************************************************* ******************************************************************************************* *********************** WORKING TRANSITION SYSTEM (DAG) *********************** ******************************************************************************************* Init Location: 0 Graph 0: Transitions: Variables: Graph 1: Transitions: 1 + i6^0, rest remain the same}> Variables: i6^0, length5^0 Graph 2: Transitions: Variables: Graph 3: Transitions: Variables: Graph 4: Transitions: Variables: Graph 5: Transitions: Variables: Precedence: Graph 0 Graph 1 Graph 2 Graph 3 Graph 4 Graph 5 Map Locations to Subgraph: ( 0 , 0 ) ( 2 , 4 ) ( 4 , 5 ) ( 5 , 1 ) ( 8 , 3 ) ( 10 , 2 ) ******************************************************************************************* ******************************** CHECKING ASSERTIONS ******************************** ******************************************************************************************* Proving termination of subgraph 0 Proving termination of subgraph 1 Checking unfeasibility... Time used: 0.001688 Checking conditional termination of SCC {l5}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000522s Ranking function: -1 - i6^0 + length5^0 New Graphs: Proving termination of subgraph 2 Checking unfeasibility... Time used: 0.001124 > No variable changes in termination graph. Checking conditional unfeasibility... Termination failed. Trying to show unreachability... Proving unreachability of entry: LOG: CALL check - Post:1 <= 0 - Process 1 * Exit transition: * Postcondition : 1 <= 0 Postcodition moved up: 1 <= 0 LOG: Try proving POST Postcondition: 1 <= 0 LOG: CALL check - Post:1 <= 0 - Process 2 * Exit transition: * Postcondition : 1 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000278s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000334s LOG: NarrowEntry size 1 Narrowing transition: 1 + i6^0, rest remain the same}> LOG: Narrow transition size 1 ENTRIES: END ENTRIES: GRAPH: 1 + i6^0, rest remain the same}> END GRAPH: EXIT: POST: 1 <= 0 LOG: Try proving POST Solving with 1 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.004328s Time used: 0.004227 Improving Solution with cost 51 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 1.000208s Time used: 1.00019 LOG: SAT solveNonLinear - Elapsed time: 1.004536s Cost: 51; Total time: 1.00442 Failed at location 5: 1 + length5^0 <= i6^0 Before Improving: Quasi-invariant at l5: 1 + length5^0 <= i6^0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.012355s Remaining time after improvement: 0.999417 Some transition disabled by a set of quasi-invariant(s): Quasi-invariant at l5: 1 + length5^0 <= i6^0 LOG: NEXT CALL check - disable LOG: CALL check - Post:1 + length5^0 <= i6^0 - Process 3 * Exit transition: * Postcondition : 1 + length5^0 <= i6^0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000332s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000376s Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.013557s Time used: 0.013453 Improving Solution with cost 51 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 1.000206s Time used: 1.0002 LOG: SAT solveNonLinear - Elapsed time: 1.013763s Cost: 51; Total time: 1.01365 Failed at location 5: length5^0 <= i6^0 Before Improving: Quasi-invariant at l5: length5^0 <= i6^0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.001954s Remaining time after improvement: 0.999398 Some transition disabled by a set of quasi-invariant(s): Quasi-invariant at l5: length5^0 <= i6^0 LOG: NEXT CALL check - disable LOG: CALL check - Post:length5^0 <= i6^0 - Process 4 * Exit transition: * Postcondition : length5^0 <= i6^0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000429s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000474s Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.052561s Time used: 0.052446 Improving Solution with cost 51 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.947689s Time used: 0.947682 LOG: SAT solveNonLinear - Elapsed time: 1.000250s Cost: 51; Total time: 1.00013 Failed at location 5: length5^0 <= 0 Before Improving: Quasi-invariant at l5: 0 <= 1 + i6^0 Quasi-invariant at l5: 0 <= i6^0 Quasi-invariant at l5: length5^0 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.004256s Remaining time after improvement: 0.999146 Some transition disabled by a set of quasi-invariant(s): Quasi-invariant at l5: 0 <= 1 + i6^0 Quasi-invariant at l5: 0 <= i6^0 Quasi-invariant at l5: length5^0 <= 0 LOG: NEXT CALL check - disable LOG: CALL check - Post:length5^0 <= 0 - Process 5 * Exit transition: * Postcondition : length5^0 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000448s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000499s LOG: Postcondition is not implied - no solution > Postcondition is not implied! LOG: RETURN check - Elapsed time: 3.043120s Cannot prove unreachability Proving non-termination of subgraph 2 Transitions: Variables: Checking conditional non-termination of SCC {l10}... > No exit transition to close. Calling reachability with... Transition: Conditions: OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: OPEN EXITS: --- Reachability graph --- > Graph without transitions. Calling reachability with... Transition: Conditions: length5^0 <= i6^0, OPEN EXITS: > Conditions are reachable! Program does NOT terminate