NO Solver Timeout: 4 Global Timeout: 300 No parsing errors! Init Location: 0 Transitions: 2}> 1}> undef7}> (~(2) + x^0)}> (~(1) + x^0)}> undef19}> 0}> Fresh variables: undef7, undef19, Undef variables: undef7, undef19, Abstraction variables: Exit nodes: Accepting locations: Asserts: Preprocessed LLVMGraph Init Location: 0 Transitions: (~(2) + x^0)}> (~(1) + x^0)}> Fresh variables: undef7, undef19, Undef variables: undef7, undef19, Abstraction variables: Exit nodes: Accepting locations: Asserts: ************************************************************* ******************************************************************************************* *********************** WORKING TRANSITION SYSTEM (DAG) *********************** ******************************************************************************************* Init Location: 0 Graph 0: Transitions: Variables: Graph 1: Transitions: -2 + x^0, rest remain the same}> -1 + x^0, rest remain the same}> Variables: x^0 Graph 2: Transitions: Variables: Precedence: Graph 0 Graph 1 Graph 2 Map Locations to Subgraph: ( 0 , 0 ) ( 2 , 2 ) ( 4 , 1 ) ******************************************************************************************* ******************************** CHECKING ASSERTIONS ******************************** ******************************************************************************************* Proving termination of subgraph 0 Proving termination of subgraph 1 Checking unfeasibility... Time used: 0.002302 Checking conditional termination of SCC {l4}... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000969s Ranking function: -1 + x^0 New Graphs: Proving termination of subgraph 2 Checking unfeasibility... Time used: 0.000923 > 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: 0.000121s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000147s LOG: NarrowEntry size 1 Narrowing transition: -2 + x^0, rest remain the same}> LOG: Narrow transition size 1 Narrowing transition: -1 + x^0, rest remain the same}> LOG: Narrow transition size 1 ENTRIES: END ENTRIES: GRAPH: -2 + x^0, rest remain the same}> -1 + x^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: 0.004339s Time used: 0.004225 Improving Solution with cost 51 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 1.071213s Time used: 1.07119 LOG: SAT solveNonLinear - Elapsed time: 1.075551s Cost: 51; Total time: 1.07542 Failed at location 4: x^0 <= 0 Before Improving: Quasi-invariant at l4: x^0 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.024682s Remaining time after improvement: 0.999347 Some transition disabled by a set of quasi-invariant(s): Quasi-invariant at l4: x^0 <= 0 LOG: NEXT CALL check - disable LOG: CALL check - Post:x^0 <= 0 - Process 3 * Exit transition: * Postcondition : x^0 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000205s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000232s Solving with 2 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.009820s Time used: 0.00972 Improving Solution with cost 51 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 1.000240s Time used: 1.00023 LOG: SAT solveNonLinear - Elapsed time: 1.010061s Cost: 51; Total time: 1.00995 Failed at location 4: x^0 <= 0 Before Improving: Quasi-invariant at l4: x^0 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.003222s Remaining time after improvement: 0.999222 Some transition disabled by a set of quasi-invariant(s): Quasi-invariant at l4: x^0 <= 0 LOG: NEXT CALL check - disable LOG: CALL check - Post:x^0 <= 0 - Process 4 * Exit transition: * Postcondition : x^0 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000316s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000343s Solving with 3 template(s). LOG: CALL solveNonLinearGetFirstSolution LOG: RETURN solveNonLinearGetFirstSolution - Elapsed time: 0.026466s Time used: 0.026338 Improving Solution with cost 51 ... LOG: CALL solveNonLinearGetNextSolution LOG: RETURN solveNonLinearGetNextSolution - Elapsed time: 0.973851s Time used: 0.973842 LOG: SAT solveNonLinear - Elapsed time: 1.000316s Cost: 51; Total time: 1.00018 Failed at location 4: x^0 <= 0 Before Improving: Quasi-invariant at l4: x^0 <= 0 Optimizing invariants... LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.007361s Remaining time after improvement: 0.999169 Some transition disabled by a set of quasi-invariant(s): Quasi-invariant at l4: x^0 <= 0 LOG: NEXT CALL check - disable LOG: CALL check - Post:x^0 <= 0 - Process 5 * Exit transition: * Postcondition : x^0 <= 0 LOG: CALL solveLinear LOG: RETURN solveLinear - Elapsed time: 0.000354s > Postcondition is not implied! LOG: RETURN check - Elapsed time: 0.000386s LOG: Postcondition is not implied - no solution > Postcondition is not implied! LOG: RETURN check - Elapsed time: 3.127297s Cannot prove unreachability Proving non-termination of subgraph 2 Transitions: Variables: Checking conditional non-termination of SCC {l2}... > 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: x^0 <= 0, OPEN EXITS: > Conditions are reachable! Program does NOT terminate