./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba --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 edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:38:46,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:38:46,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:38:46,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:38:46,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:38:46,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:38:46,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:38:46,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:38:46,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:38:46,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:38:46,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:38:46,663 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:38:46,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:38:46,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:38:46,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:38:46,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:38:46,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:38:46,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:38:46,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:38:46,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:38:46,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:38:46,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:38:46,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:38:46,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:38:46,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:38:46,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:38:46,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:38:46,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:38:46,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:38:46,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:38:46,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:38:46,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:38:46,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:38:46,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:38:46,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:38:46,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:38:46,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:38:46,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:38:46,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:38:46,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:38:46,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:38:46,717 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-22 01:38:46,761 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:38:46,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:38:46,762 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:38:46,762 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:38:46,763 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:38:46,764 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:38:46,764 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:38:46,764 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:38:46,764 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:38:46,765 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:38:46,766 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:38:46,766 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:38:46,766 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:38:46,767 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:38:46,767 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:38:46,767 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:38:46,767 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:38:46,768 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:38:46,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:38:46,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:38:46,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:38:46,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:38:46,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:38:46,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:38:46,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:38:46,770 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:38:46,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:38:46,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:38:46,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:38:46,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:38:46,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:38:46,773 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:38:46,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:38:46,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:38:46,773 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:38:46,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:38:46,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:38:46,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:38:46,774 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edd3fac09d24fc037292743bb080afb788cb886b05d29648be5f73c1396cfbb6 [2022-11-22 01:38:47,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:38:47,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:38:47,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:38:47,108 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:38:47,109 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:38:47,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2022-11-22 01:38:50,386 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:38:50,914 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:38:50,916 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i [2022-11-22 01:38:50,957 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/data/23aea01d4/241284e42c3c443b9b5af23d4dd74f53/FLAG88017cd44 [2022-11-22 01:38:50,975 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/data/23aea01d4/241284e42c3c443b9b5af23d4dd74f53 [2022-11-22 01:38:50,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:38:50,982 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:38:50,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:38:50,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:38:50,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:38:50,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:38:50" (1/1) ... [2022-11-22 01:38:50,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4990d4a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:50, skipping insertion in model container [2022-11-22 01:38:50,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:38:50" (1/1) ... [2022-11-22 01:38:51,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:38:51,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:38:51,483 WARN L237 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_17411bec-edb8-4f26-b479-565eb742835c/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2022-11-22 01:38:51,492 WARN L237 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_17411bec-edb8-4f26-b479-565eb742835c/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2022-11-22 01:38:52,456 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:52,457 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:52,458 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:52,459 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:52,467 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:52,489 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:52,490 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:52,494 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:52,501 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:52,508 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:52,511 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:52,514 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:52,520 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:53,052 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-22 01:38:53,054 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-22 01:38:53,058 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-22 01:38:53,060 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-22 01:38:53,063 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-22 01:38:53,064 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-22 01:38:53,066 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-22 01:38:53,068 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-22 01:38:53,069 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-22 01:38:53,071 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-22 01:38:53,313 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-22 01:38:53,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:38:53,360 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:38:53,375 WARN L237 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_17411bec-edb8-4f26-b479-565eb742835c/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4499,4512] [2022-11-22 01:38:53,376 WARN L237 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_17411bec-edb8-4f26-b479-565eb742835c/sv-benchmarks/c/aws-c-common/aws_linked_list_pop_front_harness.i[4559,4572] [2022-11-22 01:38:53,444 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:53,445 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:53,445 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:53,446 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:53,447 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:53,455 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:53,455 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:53,456 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:53,457 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:53,459 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:53,459 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:53,460 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:53,461 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:38:53,575 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-22 01:38:53,576 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-22 01:38:53,576 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-22 01:38:53,577 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-22 01:38:53,582 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-22 01:38:53,583 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-22 01:38:53,584 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-22 01:38:53,584 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-22 01:38:53,585 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-22 01:38:53,586 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-22 01:38:53,613 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-22 01:38:53,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:38:53,906 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:38:53,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:53 WrapperNode [2022-11-22 01:38:53,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:38:53,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:38:53,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:38:53,909 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:38:53,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:53" (1/1) ... [2022-11-22 01:38:54,003 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:53" (1/1) ... [2022-11-22 01:38:54,050 INFO L138 Inliner]: procedures = 679, calls = 1045, calls flagged for inlining = 52, calls inlined = 8, statements flattened = 224 [2022-11-22 01:38:54,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:38:54,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:38:54,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:38:54,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:38:54,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:53" (1/1) ... [2022-11-22 01:38:54,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:53" (1/1) ... [2022-11-22 01:38:54,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:53" (1/1) ... [2022-11-22 01:38:54,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:53" (1/1) ... [2022-11-22 01:38:54,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:53" (1/1) ... [2022-11-22 01:38:54,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:53" (1/1) ... [2022-11-22 01:38:54,088 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:53" (1/1) ... [2022-11-22 01:38:54,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:53" (1/1) ... [2022-11-22 01:38:54,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:38:54,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:38:54,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:38:54,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:38:54,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:53" (1/1) ... [2022-11-22 01:38:54,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:38:54,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:54,143 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:38:54,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:38:54,209 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-11-22 01:38:54,209 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-11-22 01:38:54,209 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2022-11-22 01:38:54,209 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2022-11-22 01:38:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:38:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:38:54,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 01:38:54,210 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 01:38:54,211 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-22 01:38:54,211 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-22 01:38:54,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:38:54,211 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-22 01:38:54,211 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-22 01:38:54,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:38:54,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 01:38:54,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:38:54,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:38:54,212 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-11-22 01:38:54,212 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-11-22 01:38:54,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-22 01:38:54,212 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-22 01:38:54,212 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 01:38:54,212 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 01:38:54,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:38:54,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 01:38:54,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 01:38:54,213 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-22 01:38:54,213 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-22 01:38:54,213 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-11-22 01:38:54,213 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-11-22 01:38:54,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:38:54,479 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:38:54,481 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:38:55,078 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:38:55,262 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:38:55,262 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-22 01:38:55,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:38:55 BoogieIcfgContainer [2022-11-22 01:38:55,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:38:55,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:38:55,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:38:55,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:38:55,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:38:50" (1/3) ... [2022-11-22 01:38:55,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66f86746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:38:55, skipping insertion in model container [2022-11-22 01:38:55,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:38:53" (2/3) ... [2022-11-22 01:38:55,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66f86746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:38:55, skipping insertion in model container [2022-11-22 01:38:55,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:38:55" (3/3) ... [2022-11-22 01:38:55,282 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_pop_front_harness.i [2022-11-22 01:38:55,302 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:38:55,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:38:55,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:38:55,383 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5f132ad1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:38:55,383 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:38:55,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 52 states have internal predecessors, (63), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-22 01:38:55,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 01:38:55,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:55,401 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:38:55,402 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:55,412 INFO L85 PathProgramCache]: Analyzing trace with hash 900379934, now seen corresponding path program 1 times [2022-11-22 01:38:55,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:55,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803205573] [2022-11-22 01:38:55,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:55,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-22 01:38:56,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:56,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803205573] [2022-11-22 01:38:56,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803205573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:38:56,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792674219] [2022-11-22 01:38:56,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:56,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:56,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:56,365 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:38:56,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:38:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:56,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-22 01:38:56,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:56,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18 treesize of output 19 [2022-11-22 01:38:56,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18 treesize of output 19 [2022-11-22 01:38:57,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:57,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:57,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:57,060 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 41 [2022-11-22 01:38:57,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:57,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:57,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:38:57,089 INFO L350 Elim1Store]: Elim1 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 37 treesize of output 43 [2022-11-22 01:39:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-22 01:39:00,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:00,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792674219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:00,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:00,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2022-11-22 01:39:00,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37044651] [2022-11-22 01:39:00,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:00,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 01:39:00,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:00,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 01:39:00,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:39:00,114 INFO L87 Difference]: Start difference. First operand has 99 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 52 states have internal predecessors, (63), 37 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-22 01:39:01,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:01,879 INFO L93 Difference]: Finished difference Result 245 states and 355 transitions. [2022-11-22 01:39:01,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:39:01,881 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 70 [2022-11-22 01:39:01,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:01,892 INFO L225 Difference]: With dead ends: 245 [2022-11-22 01:39:01,892 INFO L226 Difference]: Without dead ends: 157 [2022-11-22 01:39:01,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 12 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:39:01,899 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 80 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:01,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 579 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 01:39:01,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-22 01:39:01,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2022-11-22 01:39:01,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 79 states have internal predecessors, (93), 60 states have call successors, (60), 17 states have call predecessors, (60), 16 states have return successors, (59), 57 states have call predecessors, (59), 59 states have call successors, (59) [2022-11-22 01:39:01,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 212 transitions. [2022-11-22 01:39:01,978 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 212 transitions. Word has length 70 [2022-11-22 01:39:01,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:01,979 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 212 transitions. [2022-11-22 01:39:01,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-22 01:39:01,979 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 212 transitions. [2022-11-22 01:39:01,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 01:39:01,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:01,983 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:01,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:02,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:02,192 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:02,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:02,193 INFO L85 PathProgramCache]: Analyzing trace with hash 134050646, now seen corresponding path program 1 times [2022-11-22 01:39:02,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:02,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520575630] [2022-11-22 01:39:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:02,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-22 01:39:02,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:02,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520575630] [2022-11-22 01:39:02,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520575630] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:02,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134803471] [2022-11-22 01:39:02,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:02,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:02,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:02,698 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:02,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17411bec-edb8-4f26-b479-565eb742835c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:39:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:02,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-22 01:39:02,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:02,991 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-22 01:39:03,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18 treesize of output 19 [2022-11-22 01:39:03,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18 treesize of output 19 [2022-11-22 01:39:03,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:03,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:03,291 INFO L350 Elim1Store]: Elim1 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 33 treesize of output 38 [2022-11-22 01:39:03,307 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:39:03,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-22 01:39:03,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:03,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:03,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2022-11-22 01:39:03,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:03,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:03,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-22 01:39:03,356 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:39:03,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-22 01:39:03,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:03,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:03,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2022-11-22 01:39:03,388 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:39:03,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 01:39:03,516 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-22 01:39:03,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 148 treesize of output 158 [2022-11-22 01:39:03,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:03,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:03,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:03,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 138 [2022-11-22 01:39:03,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:03,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:03,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:39:03,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 57 [2022-11-22 01:39:03,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2022-11-22 01:39:43,850 WARN L233 SmtUtils]: Spent 12.83s on a formula simplification that was a NOOP. DAG size: 619 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:40:16,849 WARN L233 SmtUtils]: Spent 16.07s on a formula simplification that was a NOOP. DAG size: 616 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:40:51,368 WARN L233 SmtUtils]: Spent 17.02s on a formula simplification that was a NOOP. DAG size: 657 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:41:44,614 WARN L233 SmtUtils]: Spent 30.08s on a formula simplification that was a NOOP. DAG size: 654 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:42:32,056 WARN L233 SmtUtils]: Spent 31.08s on a formula simplification that was a NOOP. DAG size: 691 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:43:39,017 WARN L233 SmtUtils]: Spent 36.31s on a formula simplification that was a NOOP. DAG size: 692 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:44:40,032 WARN L233 SmtUtils]: Spent 38.55s on a formula simplification that was a NOOP. DAG size: 740 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:45:56,063 WARN L233 SmtUtils]: Spent 40.37s on a formula simplification that was a NOOP. DAG size: 768 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:47:01,831 WARN L233 SmtUtils]: Spent 44.72s on a formula simplification that was a NOOP. DAG size: 827 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:48:31,348 WARN L233 SmtUtils]: Spent 46.51s on a formula simplification that was a NOOP. DAG size: 882 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:49:41,646 WARN L233 SmtUtils]: Spent 46.88s on a formula simplification that was a NOOP. DAG size: 939 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:50:51,407 WARN L233 SmtUtils]: Spent 46.62s on a formula simplification that was a NOOP. DAG size: 915 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:50:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 2 proven. 17 refuted. 78 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:56,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:51:05,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:51:05,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 380 treesize of output 457 [2022-11-22 01:51:18,567 WARN L233 SmtUtils]: Spent 12.48s on a formula simplification. DAG size of input: 338 DAG size of output: 140 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-22 01:51:18,568 INFO L321 Elim1Store]: treesize reduction 955, result has 23.7 percent of original size [2022-11-22 01:51:18,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 11 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 14 new quantified variables, introduced 67 case distinctions, treesize of input 852 treesize of output 2424 [2022-11-22 01:53:34,535 WARN L233 SmtUtils]: Spent 1.44m on a formula simplification. DAG size of input: 401 DAG size of output: 200 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-22 01:53:34,536 INFO L321 Elim1Store]: treesize reduction 874, result has 36.1 percent of original size [2022-11-22 01:53:34,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 11 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 12 new quantified variables, introduced 76 case distinctions, treesize of input 51174 treesize of output 52499