./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0aec0bb8b8715e014581c4eef5e1e25c7e0452a528f8abdf2f2a721d17b0fa7f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:27:24,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:27:24,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:27:24,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:27:24,507 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:27:24,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:27:24,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:27:24,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:27:24,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:27:24,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:27:24,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:27:24,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:27:24,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:27:24,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:27:24,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:27:24,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:27:24,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:27:24,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:27:24,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:27:24,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:27:24,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:27:24,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:27:24,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:27:24,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:27:24,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:27:24,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:27:24,566 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:27:24,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:27:24,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:27:24,570 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:27:24,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:27:24,572 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:27:24,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:27:24,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:27:24,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:27:24,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:27:24,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:27:24,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:27:24,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:27:24,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:27:24,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:27:24,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 18:27:24,617 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:27:24,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:27:24,619 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:27:24,619 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:27:24,620 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:27:24,620 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:27:24,621 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:27:24,621 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:27:24,622 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:27:24,622 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:27:24,622 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:27:24,623 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:27:24,623 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:27:24,624 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:27:24,624 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:27:24,624 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:27:24,625 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:27:24,625 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:27:24,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:27:24,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:27:24,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:27:24,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:27:24,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:27:24,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:27:24,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:27:24,630 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:27:24,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:27:24,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:27:24,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:27:24,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:27:24,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:27:24,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:27:24,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:27:24,633 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:27:24,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:27:24,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:27:24,634 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:27:24,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:27:24,635 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0aec0bb8b8715e014581c4eef5e1e25c7e0452a528f8abdf2f2a721d17b0fa7f [2021-11-25 18:27:24,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:27:24,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:27:24,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:27:24,959 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:27:24,960 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:27:24,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i [2021-11-25 18:27:25,060 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/data/d62188abc/c51e0781d86c4d0eb6ddc3ff334de1bf/FLAG74020806b [2021-11-25 18:27:26,018 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:27:26,021 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i [2021-11-25 18:27:26,075 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/data/d62188abc/c51e0781d86c4d0eb6ddc3ff334de1bf/FLAG74020806b [2021-11-25 18:27:26,501 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/data/d62188abc/c51e0781d86c4d0eb6ddc3ff334de1bf [2021-11-25 18:27:26,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:27:26,506 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:27:26,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:27:26,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:27:26,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:27:26,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:27:26" (1/1) ... [2021-11-25 18:27:26,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14904760 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:26, skipping insertion in model container [2021-11-25 18:27:26,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:27:26" (1/1) ... [2021-11-25 18:27:26,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:27:26,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:27:27,038 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4494,4507] [2021-11-25 18:27:27,046 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4554,4567] [2021-11-25 18:27:28,044 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,049 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,051 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,053 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,056 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,092 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,096 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,103 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,105 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,110 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,115 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,119 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,119 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,589 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 18:27:28,590 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 18:27:28,592 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 18:27:28,593 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 18:27:28,595 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 18:27:28,596 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 18:27:28,597 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 18:27:28,597 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 18:27:28,598 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 18:27:28,599 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 18:27:28,788 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 18:27:28,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:27:28,838 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:27:28,855 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4494,4507] [2021-11-25 18:27:28,856 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4554,4567] [2021-11-25 18:27:28,947 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,948 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,948 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,949 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,950 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,977 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,978 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,979 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,979 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,981 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,982 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,982 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:28,983 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:27:29,067 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 18:27:29,068 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 18:27:29,069 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 18:27:29,070 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 18:27:29,071 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 18:27:29,072 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 18:27:29,073 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 18:27:29,074 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 18:27:29,075 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 18:27:29,075 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 18:27:29,106 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 18:27:29,126 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:27:29,433 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:27:29,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:29 WrapperNode [2021-11-25 18:27:29,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:27:29,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:27:29,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:27:29,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:27:29,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:29" (1/1) ... [2021-11-25 18:27:29,553 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:29" (1/1) ... [2021-11-25 18:27:29,628 INFO L137 Inliner]: procedures = 679, calls = 1039, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 58 [2021-11-25 18:27:29,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:27:29,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:27:29,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:27:29,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:27:29,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:29" (1/1) ... [2021-11-25 18:27:29,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:29" (1/1) ... [2021-11-25 18:27:29,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:29" (1/1) ... [2021-11-25 18:27:29,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:29" (1/1) ... [2021-11-25 18:27:29,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:29" (1/1) ... [2021-11-25 18:27:29,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:29" (1/1) ... [2021-11-25 18:27:29,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:29" (1/1) ... [2021-11-25 18:27:29,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:27:29,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:27:29,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:27:29,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:27:29,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:29" (1/1) ... [2021-11-25 18:27:29,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:27:29,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:27:29,787 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:27:29,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:27:29,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:27:29,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:27:29,880 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:27:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-25 18:27:29,882 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-25 18:27:29,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:27:29,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:27:29,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:27:29,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:27:29,883 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 18:27:29,884 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 18:27:29,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:27:29,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:27:29,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:27:29,885 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-25 18:27:29,885 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-25 18:27:29,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:27:30,166 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:27:30,178 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:27:30,480 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:27:30,551 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:27:30,551 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:27:30,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:27:30 BoogieIcfgContainer [2021-11-25 18:27:30,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:27:30,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:27:30,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:27:30,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:27:30,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:27:26" (1/3) ... [2021-11-25 18:27:30,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4444cf82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:27:30, skipping insertion in model container [2021-11-25 18:27:30,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:29" (2/3) ... [2021-11-25 18:27:30,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4444cf82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:27:30, skipping insertion in model container [2021-11-25 18:27:30,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:27:30" (3/3) ... [2021-11-25 18:27:30,564 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_prev_harness.i [2021-11-25 18:27:30,570 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:27:30,571 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:27:30,629 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:27:30,637 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:27:30,637 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:27:30,658 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-25 18:27:30,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 18:27:30,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:30,664 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:27:30,664 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:27:30,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:30,671 INFO L85 PathProgramCache]: Analyzing trace with hash 846701445, now seen corresponding path program 1 times [2021-11-25 18:27:30,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:30,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664912184] [2021-11-25 18:27:30,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:30,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:27:31,902 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:31,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664912184] [2021-11-25 18:27:31,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664912184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:27:31,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880364591] [2021-11-25 18:27:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:31,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:27:31,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:27:31,909 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:27:31,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:27:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:32,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-25 18:27:32,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:27:32,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:32,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:32,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-11-25 18:27:32,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:32,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:32,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-11-25 18:27:32,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:32,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2021-11-25 18:27:32,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:27:32,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:32,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 18:27:32,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 18:27:32,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:27:32,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 18:27:32,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-11-25 18:27:35,076 INFO L354 Elim1Store]: treesize reduction 8, result has 71.4 percent of original size [2021-11-25 18:27:35,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 147 treesize of output 100 [2021-11-25 18:27:35,109 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-11-25 18:27:35,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 61 treesize of output 35 [2021-11-25 18:27:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:27:35,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:27:35,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880364591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:27:35,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:27:35,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 17 [2021-11-25 18:27:35,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38952712] [2021-11-25 18:27:35,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:27:35,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:27:35,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:27:35,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:27:35,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-11-25 18:27:35,232 INFO L87 Difference]: Start difference. First operand has 33 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 10 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:27:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:35,380 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2021-11-25 18:27:35,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:27:35,383 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 15 [2021-11-25 18:27:35,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:35,392 INFO L225 Difference]: With dead ends: 64 [2021-11-25 18:27:35,392 INFO L226 Difference]: Without dead ends: 37 [2021-11-25 18:27:35,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-25 18:27:35,400 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:35,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 197 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2021-11-25 18:27:35,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-25 18:27:35,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-25 18:27:35,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-25 18:27:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-25 18:27:35,451 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 15 [2021-11-25 18:27:35,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:35,452 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-25 18:27:35,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 states have internal predecessors, (7), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:27:35,453 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-25 18:27:35,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:27:35,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:35,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:27:35,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:27:35,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:27:35,666 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:27:35,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:35,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1013014958, now seen corresponding path program 1 times [2021-11-25 18:27:35,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:35,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499013040] [2021-11-25 18:27:35,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:35,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:27:36,410 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:36,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499013040] [2021-11-25 18:27:36,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499013040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:27:36,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263066854] [2021-11-25 18:27:36,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:36,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:27:36,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:27:36,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:27:36,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:27:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:36,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-25 18:27:36,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:27:36,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:36,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:36,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-11-25 18:27:36,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:36,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:36,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-11-25 18:27:36,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:36,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2021-11-25 18:27:36,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:27:36,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:27:36,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:36,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-25 18:27:36,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-11-25 18:27:36,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-25 18:27:36,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-11-25 18:27:40,022 INFO L354 Elim1Store]: treesize reduction 69, result has 25.0 percent of original size [2021-11-25 18:27:40,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 301 treesize of output 173 [2021-11-25 18:27:40,071 INFO L354 Elim1Store]: treesize reduction 74, result has 8.6 percent of original size [2021-11-25 18:27:40,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 114 treesize of output 60 [2021-11-25 18:27:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:27:40,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:27:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:27:45,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263066854] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:27:45,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1817453508] [2021-11-25 18:27:45,993 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-25 18:27:45,994 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:27:46,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:27:46,012 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:27:46,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:27:46,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2021-11-25 18:27:46,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:27:46,179 INFO L354 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2021-11-25 18:27:46,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 83 [2021-11-25 18:27:46,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,293 INFO L354 Elim1Store]: treesize reduction 106, result has 33.8 percent of original size [2021-11-25 18:27:46,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 79 [2021-11-25 18:27:46,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 9 [2021-11-25 18:27:46,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:27:46,417 INFO L354 Elim1Store]: treesize reduction 26, result has 49.0 percent of original size [2021-11-25 18:27:46,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 83 [2021-11-25 18:27:46,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:46,571 INFO L354 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2021-11-25 18:27:46,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 101 [2021-11-25 18:27:46,603 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2021-11-25 18:27:46,610 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2021-11-25 18:27:46,768 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2021-11-25 18:27:47,346 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2021-11-25 18:27:47,363 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2021-11-25 18:27:47,368 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2021-11-25 18:27:47,389 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-25 18:27:47,394 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 25 for LOIs [2021-11-25 18:27:47,529 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-25 18:27:47,656 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:27:49,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '420#(and (<= 0 |__VERIFIER_assert_#in~cond|) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 5 |~#s_can_fail_allocator_static~0.base|) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2021-11-25 18:27:49,591 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:27:49,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:27:49,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11] total 32 [2021-11-25 18:27:49,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083537682] [2021-11-25 18:27:49,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:27:49,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-25 18:27:49,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:27:49,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-25 18:27:49,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2156, Unknown=0, NotChecked=0, Total=2352 [2021-11-25 18:27:49,595 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 32 states, 16 states have (on average 2.25) internal successors, (36), 25 states have internal predecessors, (36), 14 states have call successors, (17), 4 states have call predecessors, (17), 11 states have return successors, (15), 11 states have call predecessors, (15), 12 states have call successors, (15) [2021-11-25 18:27:50,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:50,209 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-11-25 18:27:50,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 18:27:50,210 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 16 states have (on average 2.25) internal successors, (36), 25 states have internal predecessors, (36), 14 states have call successors, (17), 4 states have call predecessors, (17), 11 states have return successors, (15), 11 states have call predecessors, (15), 12 states have call successors, (15) Word has length 24 [2021-11-25 18:27:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:50,211 INFO L225 Difference]: With dead ends: 45 [2021-11-25 18:27:50,212 INFO L226 Difference]: Without dead ends: 43 [2021-11-25 18:27:50,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=233, Invalid=2737, Unknown=0, NotChecked=0, Total=2970 [2021-11-25 18:27:50,215 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:50,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 325 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 235 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2021-11-25 18:27:50,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-25 18:27:50,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-25 18:27:50,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-25 18:27:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-11-25 18:27:50,229 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 24 [2021-11-25 18:27:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:50,230 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-11-25 18:27:50,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 16 states have (on average 2.25) internal successors, (36), 25 states have internal predecessors, (36), 14 states have call successors, (17), 4 states have call predecessors, (17), 11 states have return successors, (15), 11 states have call predecessors, (15), 12 states have call successors, (15) [2021-11-25 18:27:50,231 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-11-25 18:27:50,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 18:27:50,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:50,232 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:27:50,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:27:50,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-25 18:27:50,449 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:27:50,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:50,450 INFO L85 PathProgramCache]: Analyzing trace with hash 615597899, now seen corresponding path program 1 times [2021-11-25 18:27:50,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:50,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125140912] [2021-11-25 18:27:50,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:50,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:27:50,678 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:50,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125140912] [2021-11-25 18:27:50,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125140912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:27:50,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:27:50,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:27:50,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581421867] [2021-11-25 18:27:50,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:27:50,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:27:50,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:27:50,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:27:50,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:27:50,681 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:27:50,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:50,820 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-11-25 18:27:50,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:27:50,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2021-11-25 18:27:50,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:50,824 INFO L225 Difference]: With dead ends: 49 [2021-11-25 18:27:50,824 INFO L226 Difference]: Without dead ends: 47 [2021-11-25 18:27:50,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:27:50,826 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:50,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 117 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:27:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-25 18:27:50,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-25 18:27:50,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-25 18:27:50,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-11-25 18:27:50,840 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 30 [2021-11-25 18:27:50,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:50,841 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-11-25 18:27:50,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 18:27:50,841 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-11-25 18:27:50,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 18:27:50,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:50,843 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:27:50,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:27:50,844 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:27:50,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:50,844 INFO L85 PathProgramCache]: Analyzing trace with hash 584950545, now seen corresponding path program 1 times [2021-11-25 18:27:50,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:50,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808485335] [2021-11-25 18:27:50,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:50,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:27:51,561 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:51,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808485335] [2021-11-25 18:27:51,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808485335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:27:51,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350492027] [2021-11-25 18:27:51,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:51,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:27:51,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:27:51,565 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:27:51,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:27:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:51,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-25 18:27:51,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:27:51,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:51,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:51,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2021-11-25 18:27:51,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:51,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:51,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2021-11-25 18:27:51,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-25 18:27:51,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:51,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 43 [2021-11-25 18:27:51,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:51,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-11-25 18:27:51,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-11-25 18:27:51,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-11-25 18:27:51,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-25 18:27:55,139 INFO L354 Elim1Store]: treesize reduction 8, result has 71.4 percent of original size [2021-11-25 18:27:55,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 149 treesize of output 102 [2021-11-25 18:27:55,171 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-11-25 18:27:55,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 61 treesize of output 35 [2021-11-25 18:27:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:27:55,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:27:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:27:58,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350492027] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:27:58,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1422744740] [2021-11-25 18:27:58,770 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-25 18:27:58,770 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:27:58,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:27:58,771 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:27:58,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:27:58,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:58,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:58,993 INFO L354 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2021-11-25 18:27:58,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 101 [2021-11-25 18:27:59,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 75 [2021-11-25 18:27:59,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2021-11-25 18:27:59,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 75 [2021-11-25 18:27:59,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 9 [2021-11-25 18:27:59,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:27:59,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 23 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 51 [2021-11-25 18:28:00,549 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2021-11-25 18:28:00,607 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 33 for LOIs [2021-11-25 18:28:00,616 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 34 for LOIs [2021-11-25 18:28:00,761 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 15 for LOIs [2021-11-25 18:28:00,874 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:28:04,218 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '987#(and (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 5 |~#s_can_fail_allocator_static~0.base|) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2021-11-25 18:28:04,218 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:28:04,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:28:04,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 30 [2021-11-25 18:28:04,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15429035] [2021-11-25 18:28:04,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:28:04,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-25 18:28:04,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:28:04,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-25 18:28:04,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2424, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 18:28:04,223 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 30 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 25 states have internal predecessors, (46), 13 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2021-11-25 18:28:04,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:28:04,754 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-11-25 18:28:04,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 18:28:04,755 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 25 states have internal predecessors, (46), 13 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) Word has length 39 [2021-11-25 18:28:04,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:28:04,757 INFO L225 Difference]: With dead ends: 51 [2021-11-25 18:28:04,757 INFO L226 Difference]: Without dead ends: 49 [2021-11-25 18:28:04,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 64 SyntacticMatches, 16 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=280, Invalid=2912, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 18:28:04,760 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:28:04,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 191 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 147 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2021-11-25 18:28:04,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-25 18:28:04,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-25 18:28:04,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-25 18:28:04,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-11-25 18:28:04,778 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 39 [2021-11-25 18:28:04,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:28:04,779 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-11-25 18:28:04,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 25 states have internal predecessors, (46), 13 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2021-11-25 18:28:04,779 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-11-25 18:28:04,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 18:28:04,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:28:04,782 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:28:04,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-25 18:28:04,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:04,989 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:28:04,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:28:04,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1736704596, now seen corresponding path program 1 times [2021-11-25 18:28:04,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:28:04,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484139971] [2021-11-25 18:28:04,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:04,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:28:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 18:28:06,047 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:28:06,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484139971] [2021-11-25 18:28:06,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484139971] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:28:06,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145019011] [2021-11-25 18:28:06,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:06,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:06,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:28:06,050 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:28:06,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:28:06,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:06,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-25 18:28:06,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:28:12,483 INFO L354 Elim1Store]: treesize reduction 54, result has 69.5 percent of original size [2021-11-25 18:28:12,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 240 treesize of output 266 [2021-11-25 18:28:12,637 INFO L354 Elim1Store]: treesize reduction 20, result has 84.5 percent of original size [2021-11-25 18:28:12,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 246 treesize of output 261 [2021-11-25 18:28:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:28:19,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:28:30,976 WARN L227 SmtUtils]: Spent 8.08s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:28:41,340 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:28:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 18:28:43,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145019011] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:28:43,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [123876021] [2021-11-25 18:28:43,128 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-25 18:28:43,129 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:28:43,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:28:43,130 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:28:43,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:28:43,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,328 INFO L354 Elim1Store]: treesize reduction 174, result has 25.0 percent of original size [2021-11-25 18:28:43,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 101 [2021-11-25 18:28:43,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 9 [2021-11-25 18:28:43,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 23 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 51 [2021-11-25 18:28:43,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 75 [2021-11-25 18:28:43,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 21 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 75 [2021-11-25 18:28:43,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:28:43,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2021-11-25 18:28:44,732 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 35 for LOIs [2021-11-25 18:28:44,794 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 33 for LOIs [2021-11-25 18:28:44,801 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 34 for LOIs [2021-11-25 18:28:44,923 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 15 for LOIs [2021-11-25 18:28:45,019 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:28:49,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1490#(and (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 5 |~#s_can_fail_allocator_static~0.base|) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2021-11-25 18:28:49,065 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:28:49,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:28:49,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 16] total 43 [2021-11-25 18:28:49,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958705846] [2021-11-25 18:28:49,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:28:49,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-25 18:28:49,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:28:49,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-25 18:28:49,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=4137, Unknown=1, NotChecked=0, Total=4422 [2021-11-25 18:28:49,069 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 43 states, 25 states have (on average 2.08) internal successors, (52), 31 states have internal predecessors, (52), 16 states have call successors, (30), 4 states have call predecessors, (30), 14 states have return successors, (28), 17 states have call predecessors, (28), 14 states have call successors, (28) [2021-11-25 18:28:58,881 WARN L227 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:28:58,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:28:58,882 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-11-25 18:28:58,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 18:28:58,882 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 25 states have (on average 2.08) internal successors, (52), 31 states have internal predecessors, (52), 16 states have call successors, (30), 4 states have call predecessors, (30), 14 states have return successors, (28), 17 states have call predecessors, (28), 14 states have call successors, (28) Word has length 48 [2021-11-25 18:28:58,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:28:58,884 INFO L225 Difference]: With dead ends: 57 [2021-11-25 18:28:58,884 INFO L226 Difference]: Without dead ends: 53 [2021-11-25 18:28:58,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 85 SyntacticMatches, 13 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1935 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=413, Invalid=5748, Unknown=1, NotChecked=0, Total=6162 [2021-11-25 18:28:58,888 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 25 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:28:58,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 309 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 366 Invalid, 0 Unknown, 153 Unchecked, 0.4s Time] [2021-11-25 18:28:58,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-25 18:28:58,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-25 18:28:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 30 states have (on average 1.0) internal successors, (30), 30 states have internal predecessors, (30), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-25 18:28:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-11-25 18:28:58,901 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 48 [2021-11-25 18:28:58,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:28:58,902 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-11-25 18:28:58,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 25 states have (on average 2.08) internal successors, (52), 31 states have internal predecessors, (52), 16 states have call successors, (30), 4 states have call predecessors, (30), 14 states have return successors, (28), 17 states have call predecessors, (28), 14 states have call successors, (28) [2021-11-25 18:28:58,903 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-11-25 18:28:58,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 18:28:58,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:28:58,905 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:28:58,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-25 18:28:59,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:28:59,109 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:28:59,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:28:59,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2033998271, now seen corresponding path program 1 times [2021-11-25 18:28:59,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:28:59,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319566652] [2021-11-25 18:28:59,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:28:59,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:28:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:28:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-25 18:28:59,676 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:28:59,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319566652] [2021-11-25 18:28:59,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319566652] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:28:59,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:28:59,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-25 18:28:59,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015175842] [2021-11-25 18:28:59,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:28:59,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 18:28:59,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:28:59,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 18:28:59,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:28:59,678 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 13 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-25 18:28:59,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:28:59,926 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-11-25 18:28:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:28:59,927 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) Word has length 54 [2021-11-25 18:28:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:28:59,927 INFO L225 Difference]: With dead ends: 53 [2021-11-25 18:28:59,927 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 18:28:59,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:28:59,929 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:28:59,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 154 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:28:59,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 18:28:59,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 18:28:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:28:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 18:28:59,931 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2021-11-25 18:28:59,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:28:59,931 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 18:28:59,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-25 18:28:59,931 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 18:28:59,931 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 18:28:59,934 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 18:28:59,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:28:59,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-25 18:29:01,007 INFO L858 garLoopResultBuilder]: For program point aws_linked_list_node_next_is_validEXIT(lines 4717 4721) no Hoare annotation was computed. [2021-11-25 18:29:01,008 INFO L861 garLoopResultBuilder]: At program point aws_linked_list_node_next_is_validENTRY(lines 4717 4721) the Hoare annotation is: true [2021-11-25 18:29:01,008 INFO L858 garLoopResultBuilder]: For program point aws_linked_list_node_prev_is_validEXIT(lines 4728 4732) no Hoare annotation was computed. [2021-11-25 18:29:01,008 INFO L861 garLoopResultBuilder]: At program point aws_linked_list_node_prev_is_validENTRY(lines 4728 4732) the Hoare annotation is: true [2021-11-25 18:29:01,008 INFO L861 garLoopResultBuilder]: At program point L7391-1(line 7391) the Hoare annotation is: true [2021-11-25 18:29:01,008 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-25 18:29:01,009 INFO L854 garLoopResultBuilder]: At program point L7391(line 7391) the Hoare annotation is: (let ((.cse0 (+ |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| 8))) (and (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.offset| 0) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) .cse0) |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (= 0 |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset|) (= |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (not (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|)) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) .cse0)) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| 0))) [2021-11-25 18:29:01,009 INFO L858 garLoopResultBuilder]: For program point L7389-2(line 7389) no Hoare annotation was computed. [2021-11-25 18:29:01,009 INFO L854 garLoopResultBuilder]: At program point L7389-1(line 7389) the Hoare annotation is: (let ((.cse1 (+ |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| 8)) (.cse0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base|) |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset|))) (and (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.offset| 0) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select (select |#memory_$Pointer$.offset| .cse0) 8) |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) .cse1) |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (= 0 |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset|) (<= |ULTIMATE.start_aws_linked_list_prev_harness_#t~ret675#1| 1) (= |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (<= 1 |ULTIMATE.start_aws_linked_list_prev_harness_#t~ret675#1|) (not (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|)) (not (= .cse0 0)) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) .cse1)) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base|) |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset|) 0) (not (= |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base| 0)) (= |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base| (select (select |#memory_$Pointer$.base| .cse0) 8)))) [2021-11-25 18:29:01,010 INFO L854 garLoopResultBuilder]: At program point L7389(line 7389) the Hoare annotation is: (let ((.cse1 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (+ |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset| 8))) (.cse0 (+ |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| 8))) (and (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.offset| 0) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) .cse0) |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (= 0 |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset|) (= |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (not (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|)) (= (select (select |#memory_$Pointer$.base| .cse1) 0) |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select (select |#memory_$Pointer$.offset| .cse1) 0) |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base|) |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset|) 0)) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) .cse0)) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base|) |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset|) 0) (not (= |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base| 0)))) [2021-11-25 18:29:01,010 INFO L854 garLoopResultBuilder]: At program point L4852-1(line 4852) the Hoare annotation is: (let ((.cse1 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (+ |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset| 8))) (.cse0 (+ |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| 8))) (and (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.offset| 0) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) .cse0) |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (<= 1 |ULTIMATE.start_aws_linked_list_prev_#t~ret337#1|) (not (= .cse1 0)) (not (= |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base| 0)) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| 0) (not (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|)) (= (select (select |#memory_$Pointer$.base| .cse1) 0) |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select (select |#memory_$Pointer$.offset| .cse1) 0) |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) .cse0)) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| 0) (<= |ULTIMATE.start_aws_linked_list_prev_#t~ret337#1| 1))) [2021-11-25 18:29:01,010 INFO L858 garLoopResultBuilder]: For program point L4852-2(line 4852) no Hoare annotation was computed. [2021-11-25 18:29:01,011 INFO L854 garLoopResultBuilder]: At program point L4852(line 4852) the Hoare annotation is: (let ((.cse0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (+ |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset| 8)))) (and (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.offset| 0) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) (+ |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| 8)) |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (= (select (select |#memory_$Pointer$.base| .cse0) 0) |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select (select |#memory_$Pointer$.offset| .cse0) 0) |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (exists ((|ULTIMATE.start_aws_linked_list_prev_~node#1.base| Int)) (let ((.cse1 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) 8)) (.cse2 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) 8))) (and (= .cse1 |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset|) (= (select (select |#memory_$Pointer$.offset| .cse2) 0) 0) (= (select (select |#memory_$Pointer$.base| .cse2) 0) |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) (= .cse1 0) (not (= .cse2 0)) (not (= .cse2 |ULTIMATE.start_aws_linked_list_prev_~node#1.base|)) (< 1 |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) (= .cse2 |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base|)))))) [2021-11-25 18:29:01,011 INFO L854 garLoopResultBuilder]: At program point L7390(line 7390) the Hoare annotation is: (let ((.cse1 (+ |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| 8)) (.cse0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base|) |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset|))) (and (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.offset| 0) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select (select |#memory_$Pointer$.offset| .cse0) 8) |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) .cse1) |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (= 0 |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset|) (= |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (not (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|)) (not (= .cse0 0)) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) .cse1)) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base|) |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset|) 0) (not (= |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base| 0)) (= |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base| (select (select |#memory_$Pointer$.base| .cse0) 8)))) [2021-11-25 18:29:01,011 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-25 18:29:01,011 INFO L858 garLoopResultBuilder]: For program point L7390-2(line 7390) no Hoare annotation was computed. [2021-11-25 18:29:01,012 INFO L854 garLoopResultBuilder]: At program point L7390-1(line 7390) the Hoare annotation is: (let ((.cse0 (+ |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| 8))) (and (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.offset| 0) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (<= 1 |ULTIMATE.start_aws_linked_list_prev_harness_#t~ret676#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) .cse0) |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (= 0 |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.offset|) (<= |ULTIMATE.start_aws_linked_list_prev_harness_#t~ret676#1| 1) (= |ULTIMATE.start_aws_linked_list_prev_harness_~rval~10#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (not (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|)) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) .cse0)) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| 0))) [2021-11-25 18:29:01,012 INFO L854 garLoopResultBuilder]: At program point L4851(line 4851) the Hoare annotation is: (let ((.cse0 (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|))) (let ((.cse3 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (+ |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset| 8))) (.cse2 (select .cse0 8)) (.cse1 (+ |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| 8))) (and (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.offset| 0) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select .cse0 .cse1) |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (< 1 .cse2) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| 0) (= (select (select |#memory_$Pointer$.base| .cse3) 0) |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select (select |#memory_$Pointer$.offset| .cse3) 0) |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (not (= .cse2 |ULTIMATE.start_aws_linked_list_prev_~node#1.base|)) (< 1 |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) .cse1)) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| 0)))) [2021-11-25 18:29:01,012 INFO L854 garLoopResultBuilder]: At program point L4851-1(line 4851) the Hoare annotation is: (let ((.cse2 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (+ |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset| 8)))) (and (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.offset| 0) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) (+ |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| 8)) |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (exists ((|ULTIMATE.start_aws_linked_list_prev_~node#1.base| Int)) (let ((.cse0 (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) 8)) (.cse1 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) 8))) (and (= .cse0 |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset|) (= |ULTIMATE.start_aws_linked_list_prev_#t~ret336#1| 1) (= (select (select |#memory_$Pointer$.offset| .cse1) 0) 0) (= (select (select |#memory_$Pointer$.base| .cse1) 0) |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) (= .cse0 0) (not (= .cse1 0)) (not (= .cse1 |ULTIMATE.start_aws_linked_list_prev_~node#1.base|)) (< 1 |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) (= .cse1 |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base|)))) (= (select (select |#memory_$Pointer$.base| .cse2) 0) |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select (select |#memory_$Pointer$.offset| .cse2) 0) |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|))) [2021-11-25 18:29:01,012 INFO L854 garLoopResultBuilder]: At program point L4853(line 4853) the Hoare annotation is: (let ((.cse2 (+ |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset| 8))) (let ((.cse0 (+ |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| 8)) (.cse1 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) .cse2))) (and (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.offset| 0) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) .cse0) |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (not (= .cse1 0)) (not (= |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base| 0)) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| 0) (not (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|)) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base| |ULTIMATE.start_aws_linked_list_prev_#t~mem338#1.base|) (= (select (select |#memory_$Pointer$.base| .cse1) 0) |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select (select |#memory_$Pointer$.offset| .cse1) 0) |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (= |ULTIMATE.start_aws_linked_list_prev_#t~mem338#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) .cse2)) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) .cse0)) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| 0) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base| .cse1)))) [2021-11-25 18:29:01,013 INFO L854 garLoopResultBuilder]: At program point L4853-1(line 4853) the Hoare annotation is: (let ((.cse1 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (+ |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset| 8))) (.cse0 (+ |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| 8))) (and (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.offset| 0) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| |ULTIMATE.start_aws_linked_list_prev_#t~mem338#1.offset|) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) .cse0) |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset| 0) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (not (= |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base| 0)) (not (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|)) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base| |ULTIMATE.start_aws_linked_list_prev_#t~mem338#1.base|) (= (select (select |#memory_$Pointer$.base| .cse1) 0) |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select (select |#memory_$Pointer$.offset| .cse1) 0) |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) .cse0)) (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.offset| 0) (not (= |ULTIMATE.start_aws_linked_list_prev_~rval~5#1.base| 0)))) [2021-11-25 18:29:01,013 INFO L858 garLoopResultBuilder]: For program point L4849-2(line 4849) no Hoare annotation was computed. [2021-11-25 18:29:01,013 INFO L854 garLoopResultBuilder]: At program point L4849(line 4849) the Hoare annotation is: (let ((.cse0 (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|))) (let ((.cse2 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (+ |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset| 8))) (.cse1 (select .cse0 8))) (and (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.offset| 0) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select .cse0 (+ |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| 8)) |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (< 1 .cse1) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| 0) (= (select (select |#memory_$Pointer$.base| .cse2) 0) |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) 8) 0) (= (select (select |#memory_$Pointer$.offset| .cse2) 0) |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (not (= .cse1 |ULTIMATE.start_aws_linked_list_prev_~node#1.base|)) (< 1 |ULTIMATE.start_aws_linked_list_prev_~node#1.base|)))) [2021-11-25 18:29:01,014 INFO L858 garLoopResultBuilder]: For program point L4851-2(line 4851) no Hoare annotation was computed. [2021-11-25 18:29:01,014 INFO L854 garLoopResultBuilder]: At program point L4849-1(line 4849) the Hoare annotation is: (let ((.cse0 (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|))) (let ((.cse2 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (+ |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset| 8))) (.cse1 (select .cse0 8))) (and (= |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.offset| 0) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.base| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select .cse0 (+ |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| 8)) |ULTIMATE.start_aws_linked_list_prev_harness_~#before~0#1.base|) (< 1 .cse1) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (= |ULTIMATE.start_aws_linked_list_prev_~node#1.offset| 0) (= (select (select |#memory_$Pointer$.base| .cse2) 0) |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) 8) 0) (= (select (select |#memory_$Pointer$.offset| .cse2) 0) |ULTIMATE.start_aws_linked_list_prev_harness_~#node~1#1.offset|) (not (= .cse1 |ULTIMATE.start_aws_linked_list_prev_~node#1.base|)) (< 1 |ULTIMATE.start_aws_linked_list_prev_~node#1.base|) (= |ULTIMATE.start_aws_linked_list_prev_#t~ret334#1| 1)))) [2021-11-25 18:29:01,014 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 210 212) the Hoare annotation is: true [2021-11-25 18:29:01,014 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 210 212) no Hoare annotation was computed. [2021-11-25 18:29:01,014 INFO L858 garLoopResultBuilder]: For program point L223(line 223) no Hoare annotation was computed. [2021-11-25 18:29:01,014 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 222 224) the Hoare annotation is: true [2021-11-25 18:29:01,015 INFO L858 garLoopResultBuilder]: For program point L223-1(line 223) no Hoare annotation was computed. [2021-11-25 18:29:01,015 INFO L858 garLoopResultBuilder]: For program point L223-3(lines 222 224) no Hoare annotation was computed. [2021-11-25 18:29:01,015 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 222 224) no Hoare annotation was computed. [2021-11-25 18:29:01,015 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 223) no Hoare annotation was computed. [2021-11-25 18:29:01,018 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-11-25 18:29:01,020 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:29:01,035 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2021-11-25 18:29:01,036 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2021-11-25 18:29:01,037 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2021-11-25 18:29:01,037 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2021-11-25 18:29:01,037 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2021-11-25 18:29:01,038 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2021-11-25 18:29:01,042 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2021-11-25 18:29:01,043 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2021-11-25 18:29:01,043 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2021-11-25 18:29:01,043 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2021-11-25 18:29:01,044 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2021-11-25 18:29:01,044 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2021-11-25 18:29:01,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:29:01 BoogieIcfgContainer [2021-11-25 18:29:01,047 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:29:01,048 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:29:01,048 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:29:01,048 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:29:01,049 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:27:30" (3/4) ... [2021-11-25 18:29:01,052 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 18:29:01,059 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure aws_linked_list_node_next_is_valid [2021-11-25 18:29:01,059 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure aws_linked_list_node_prev_is_valid [2021-11-25 18:29:01,059 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-11-25 18:29:01,060 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-25 18:29:01,066 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 30 nodes and edges [2021-11-25 18:29:01,066 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-11-25 18:29:01,067 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-25 18:29:01,067 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 18:29:01,114 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 18:29:01,115 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:29:01,116 INFO L158 Benchmark]: Toolchain (without parser) took 94609.43ms. Allocated memory was 104.9MB in the beginning and 388.0MB in the end (delta: 283.1MB). Free memory was 65.7MB in the beginning and 135.7MB in the end (delta: -70.0MB). Peak memory consumption was 212.8MB. Max. memory is 16.1GB. [2021-11-25 18:29:01,116 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 104.9MB. Free memory was 60.2MB in the beginning and 60.1MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:29:01,117 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2926.06ms. Allocated memory was 104.9MB in the beginning and 134.2MB in the end (delta: 29.4MB). Free memory was 65.4MB in the beginning and 64.6MB in the end (delta: 828.2kB). Peak memory consumption was 43.5MB. Max. memory is 16.1GB. [2021-11-25 18:29:01,117 INFO L158 Benchmark]: Boogie Procedure Inliner took 193.87ms. Allocated memory is still 134.2MB. Free memory was 64.6MB in the beginning and 59.7MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 18:29:01,118 INFO L158 Benchmark]: Boogie Preprocessor took 107.22ms. Allocated memory is still 134.2MB. Free memory was 59.7MB in the beginning and 57.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:29:01,118 INFO L158 Benchmark]: RCFGBuilder took 816.72ms. Allocated memory is still 134.2MB. Free memory was 57.6MB in the beginning and 76.5MB in the end (delta: -18.8MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. [2021-11-25 18:29:01,119 INFO L158 Benchmark]: TraceAbstraction took 90490.78ms. Allocated memory was 134.2MB in the beginning and 388.0MB in the end (delta: 253.8MB). Free memory was 76.5MB in the beginning and 141.0MB in the end (delta: -64.5MB). Peak memory consumption was 189.0MB. Max. memory is 16.1GB. [2021-11-25 18:29:01,119 INFO L158 Benchmark]: Witness Printer took 66.92ms. Allocated memory is still 388.0MB. Free memory was 141.0MB in the beginning and 135.7MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 18:29:01,121 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 104.9MB. Free memory was 60.2MB in the beginning and 60.1MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2926.06ms. Allocated memory was 104.9MB in the beginning and 134.2MB in the end (delta: 29.4MB). Free memory was 65.4MB in the beginning and 64.6MB in the end (delta: 828.2kB). Peak memory consumption was 43.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 193.87ms. Allocated memory is still 134.2MB. Free memory was 64.6MB in the beginning and 59.7MB in the end (delta: 4.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 107.22ms. Allocated memory is still 134.2MB. Free memory was 59.7MB in the beginning and 57.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 816.72ms. Allocated memory is still 134.2MB. Free memory was 57.6MB in the beginning and 76.5MB in the end (delta: -18.8MB). Peak memory consumption was 9.7MB. Max. memory is 16.1GB. * TraceAbstraction took 90490.78ms. Allocated memory was 134.2MB in the beginning and 388.0MB in the end (delta: 253.8MB). Free memory was 76.5MB in the beginning and 141.0MB in the end (delta: -64.5MB). Peak memory consumption was 189.0MB. Max. memory is 16.1GB. * Witness Printer took 66.92ms. Allocated memory is still 388.0MB. Free memory was 141.0MB in the beginning and 135.7MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base - GenericResult: Unfinished Backtranslation Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 223]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 90.4s, OverallIterations: 6, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 11.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 106 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 96 mSDsluCounter, 1293 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 280 IncrementalHoareTripleChecker+Unchecked, 1264 mSDsCounter, 87 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 963 IncrementalHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 87 mSolverCounterUnsat, 147 mSDtfsCounter, 963 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 451 GetRequests, 189 SyntacticMatches, 41 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4144 ImplicationChecksByTransitivity, 46.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=5, InterpolantAutomatonStates: 87, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 34 PreInvPairs, 44 NumberOfFragments, 1088 HoareAnnotationTreeSize, 34 FomulaSimplifications, 64 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 18 FomulaSimplificationsInter, 4326 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 59.9s InterpolantComputationTime, 336 NumberOfCodeBlocks, 336 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 434 ConstructedInterpolants, 60 QuantifiedInterpolants, 13306 SizeOfPredicates, 113 NumberOfNonLiveVariables, 944 ConjunctsInSsa, 297 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 223/276 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7391]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 4853]: Loop Invariant [2021-11-25 18:29:01,133 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2021-11-25 18:29:01,133 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2021-11-25 18:29:01,134 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2021-11-25 18:29:01,134 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2021-11-25 18:29:01,134 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2021-11-25 18:29:01,135 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2021-11-25 18:29:01,136 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2021-11-25 18:29:01,137 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2021-11-25 18:29:01,137 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2021-11-25 18:29:01,137 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset [2021-11-25 18:29:01,137 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.base [2021-11-25 18:29:01,138 WARN L418 cessorBacktranslator]: Unfinished backtranslation: Name guessing unsuccessful for VarDecl var #memory_$Pointer$ : [$Pointer$]$Pointer$; and expression #memory_$Pointer$.offset Derived loop invariant: (((((((((((((rval == before && before == 0) && rval == node->prev) && node == node) && #memory_$Pointer$[node][node + 8] == before) && node == 0) && node == node) && !(node == 0)) && !(before == node)) && rval == node->prev) && #memory_$Pointer$[#memory_$Pointer$[node][node + 8]][0] == node) && #memory_$Pointer$[#memory_$Pointer$[node][node + 8]][0] == node) && rval == #memory_$Pointer$[node][node + 8]) && rval == 0) && !(rval == 0) RESULT: Ultimate proved your program to be correct! [2021-11-25 18:29:01,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4bb44d8c-3223-4074-9962-13c385abdbc6/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE