./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW --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 fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d --- 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-4e7fbc6 [2022-11-23 14:32:44,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:32:44,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:32:45,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:32:45,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:32:45,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:32:45,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:32:45,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:32:45,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:32:45,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:32:45,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:32:45,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:32:45,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:32:45,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:32:45,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:32:45,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:32:45,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:32:45,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:32:45,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:32:45,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:32:45,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:32:45,040 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:32:45,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:32:45,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:32:45,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:32:45,048 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:32:45,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:32:45,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:32:45,050 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:32:45,051 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:32:45,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:32:45,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:32:45,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:32:45,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:32:45,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:32:45,068 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:32:45,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:32:45,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:32:45,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:32:45,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:32:45,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:32:45,081 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 14:32:45,147 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:32:45,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:32:45,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:32:45,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:32:45,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:32:45,149 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:32:45,150 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:32:45,150 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:32:45,150 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:32:45,150 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:32:45,151 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:32:45,151 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:32:45,151 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:32:45,151 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:32:45,152 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:32:45,152 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:32:45,152 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:32:45,152 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:32:45,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:32:45,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:32:45,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:32:45,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:32:45,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:32:45,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:32:45,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:32:45,155 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:32:45,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:32:45,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:32:45,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:32:45,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:32:45,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:32:45,156 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:32:45,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:32:45,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:32:45,157 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:32:45,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:32:45,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:32:45,158 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:32:45,158 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_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d [2022-11-23 14:32:45,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:32:45,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:32:45,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:32:45,591 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:32:45,593 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:32:45,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2022-11-23 14:32:48,767 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:32:49,378 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:32:49,381 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2022-11-23 14:32:49,424 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/data/f720a014a/fecd13de92ad42d4b295eca9f73c6d1d/FLAG43209d2f6 [2022-11-23 14:32:49,449 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/data/f720a014a/fecd13de92ad42d4b295eca9f73c6d1d [2022-11-23 14:32:49,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:32:49,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:32:49,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:32:49,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:32:49,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:32:49,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:32:49" (1/1) ... [2022-11-23 14:32:49,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fe06fc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:49, skipping insertion in model container [2022-11-23 14:32:49,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:32:49" (1/1) ... [2022-11-23 14:32:49,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:32:49,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:32:49,868 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_d8246a1e-202c-4a8e-b5fe-82e36122d908/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2022-11-23 14:32:49,879 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_d8246a1e-202c-4a8e-b5fe-82e36122d908/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2022-11-23 14:32:50,958 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:50,966 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:50,967 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:50,968 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:50,969 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,005 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,006 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,009 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,010 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,012 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,013 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,015 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,015 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,512 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-23 14:32:51,516 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-23 14:32:51,518 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-23 14:32:51,521 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-23 14:32:51,528 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-23 14:32:51,530 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-23 14:32:51,532 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-23 14:32:51,534 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-23 14:32:51,536 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-23 14:32:51,551 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-23 14:32:51,750 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-23 14:32:51,782 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:32:51,802 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:32:51,817 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_d8246a1e-202c-4a8e-b5fe-82e36122d908/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2022-11-23 14:32:51,831 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_d8246a1e-202c-4a8e-b5fe-82e36122d908/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2022-11-23 14:32:51,881 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,889 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,890 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,890 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,891 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,900 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,909 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,911 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,912 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,914 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,916 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,917 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:51,917 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 14:32:52,039 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-23 14:32:52,041 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-23 14:32:52,042 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-23 14:32:52,043 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-23 14:32:52,044 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-23 14:32:52,045 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-23 14:32:52,045 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-23 14:32:52,046 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-23 14:32:52,047 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-23 14:32:52,047 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-23 14:32:52,088 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-23 14:32:52,106 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:32:52,337 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:32:52,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:52 WrapperNode [2022-11-23 14:32:52,338 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:32:52,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:32:52,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:32:52,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:32:52,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:52" (1/1) ... [2022-11-23 14:32:52,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:52" (1/1) ... [2022-11-23 14:32:52,509 INFO L138 Inliner]: procedures = 679, calls = 1079, calls flagged for inlining = 51, calls inlined = 5, statements flattened = 213 [2022-11-23 14:32:52,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:32:52,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:32:52,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:32:52,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:32:52,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:52" (1/1) ... [2022-11-23 14:32:52,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:52" (1/1) ... [2022-11-23 14:32:52,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:52" (1/1) ... [2022-11-23 14:32:52,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:52" (1/1) ... [2022-11-23 14:32:52,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:52" (1/1) ... [2022-11-23 14:32:52,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:52" (1/1) ... [2022-11-23 14:32:52,557 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:52" (1/1) ... [2022-11-23 14:32:52,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:52" (1/1) ... [2022-11-23 14:32:52,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:32:52,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:32:52,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:32:52,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:32:52,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:52" (1/1) ... [2022-11-23 14:32:52,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:32:52,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:52,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:32:52,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:32:52,783 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2022-11-23 14:32:52,783 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2022-11-23 14:32:52,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:32:52,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 14:32:52,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 14:32:52,783 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-23 14:32:52,784 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-23 14:32:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_linked_list_is_allocated [2022-11-23 14:32:52,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_linked_list_is_allocated [2022-11-23 14:32:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:32:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-23 14:32:52,784 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-23 14:32:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:32:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 14:32:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:32:52,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:32:52,785 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-11-23 14:32:52,785 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-11-23 14:32:52,785 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 14:32:52,785 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 14:32:52,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:32:52,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 14:32:52,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 14:32:52,785 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-23 14:32:52,785 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-23 14:32:52,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:32:53,229 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:32:53,232 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:32:53,802 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:32:53,890 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:32:53,890 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 14:32:53,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:53 BoogieIcfgContainer [2022-11-23 14:32:53,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:32:53,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:32:53,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:32:53,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:32:53,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:32:49" (1/3) ... [2022-11-23 14:32:53,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@980d8d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:32:53, skipping insertion in model container [2022-11-23 14:32:53,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:52" (2/3) ... [2022-11-23 14:32:53,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@980d8d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:32:53, skipping insertion in model container [2022-11-23 14:32:53,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:53" (3/3) ... [2022-11-23 14:32:53,903 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_swap_contents_harness.i [2022-11-23 14:32:53,927 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:32:53,927 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:32:53,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:32:54,005 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;@5b6d19d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:32:54,005 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:32:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 48 states have internal predecessors, (57), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-23 14:32:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-23 14:32:54,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:54,026 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:32:54,028 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:54,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:54,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1308370605, now seen corresponding path program 1 times [2022-11-23 14:32:54,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:54,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618686927] [2022-11-23 14:32:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:54,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:32:55,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:55,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618686927] [2022-11-23 14:32:55,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618686927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:32:55,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933824768] [2022-11-23 14:32:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:55,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:55,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:55,798 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:55,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:32:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:56,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 14:32:56,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 14:32:56,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:32:56,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933824768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:32:56,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:32:56,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 9 [2022-11-23 14:32:56,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111933304] [2022-11-23 14:32:56,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:56,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:32:56,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:56,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:32:56,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:32:56,630 INFO L87 Difference]: Start difference. First operand has 89 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 48 states have internal predecessors, (57), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 7 states, 4 states have (on average 6.25) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-23 14:32:57,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:57,321 INFO L93 Difference]: Finished difference Result 166 states and 254 transitions. [2022-11-23 14:32:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:32:57,324 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 4 states have (on average 6.25) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 62 [2022-11-23 14:32:57,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:57,337 INFO L225 Difference]: With dead ends: 166 [2022-11-23 14:32:57,337 INFO L226 Difference]: Without dead ends: 87 [2022-11-23 14:32:57,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:32:57,353 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 42 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:57,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 463 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:32:57,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-23 14:32:57,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-11-23 14:32:57,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 43 states have (on average 1.255813953488372) internal successors, (54), 48 states have internal predecessors, (54), 34 states have call successors, (34), 8 states have call predecessors, (34), 9 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2022-11-23 14:32:57,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 126 transitions. [2022-11-23 14:32:57,454 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 126 transitions. Word has length 62 [2022-11-23 14:32:57,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:57,455 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 126 transitions. [2022-11-23 14:32:57,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 4 states have (on average 6.25) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-23 14:32:57,456 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 126 transitions. [2022-11-23 14:32:57,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-23 14:32:57,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:57,463 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:32:57,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:32:57,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:57,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:57,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:57,673 INFO L85 PathProgramCache]: Analyzing trace with hash -825605775, now seen corresponding path program 1 times [2022-11-23 14:32:57,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:57,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575937715] [2022-11-23 14:32:57,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:57,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:32:58,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:58,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575937715] [2022-11-23 14:32:58,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575937715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:32:58,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100351861] [2022-11-23 14:32:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:58,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:58,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:58,323 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:58,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:32:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:58,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:32:58,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 14:32:58,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:32:58,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100351861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:32:58,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:32:58,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-23 14:32:58,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984246133] [2022-11-23 14:32:58,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:58,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:32:58,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:58,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:32:58,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:32:58,909 INFO L87 Difference]: Start difference. First operand 87 states and 126 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-23 14:32:59,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:59,479 INFO L93 Difference]: Finished difference Result 163 states and 243 transitions. [2022-11-23 14:32:59,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:32:59,480 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 64 [2022-11-23 14:32:59,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:59,485 INFO L225 Difference]: With dead ends: 163 [2022-11-23 14:32:59,486 INFO L226 Difference]: Without dead ends: 90 [2022-11-23 14:32:59,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:32:59,493 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 64 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:59,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 427 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:32:59,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-23 14:32:59,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-11-23 14:32:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 51 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2022-11-23 14:32:59,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 132 transitions. [2022-11-23 14:32:59,532 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 132 transitions. Word has length 64 [2022-11-23 14:32:59,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:59,533 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 132 transitions. [2022-11-23 14:32:59,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-23 14:32:59,534 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 132 transitions. [2022-11-23 14:32:59,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-23 14:32:59,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:59,545 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2022-11-23 14:32:59,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:32:59,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-23 14:32:59,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:32:59,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:59,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2097948773, now seen corresponding path program 1 times [2022-11-23 14:32:59,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:59,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414296890] [2022-11-23 14:32:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:59,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:33:00,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:00,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414296890] [2022-11-23 14:33:00,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414296890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:00,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028429785] [2022-11-23 14:33:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:00,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:00,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:00,391 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:00,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:33:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:00,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 14:33:00,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 14:33:01,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:33:01,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028429785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:33:01,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:33:01,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-23 14:33:01,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949043868] [2022-11-23 14:33:01,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:33:01,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:33:01,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:01,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:33:01,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:33:01,030 INFO L87 Difference]: Start difference. First operand 90 states and 132 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-23 14:33:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:01,703 INFO L93 Difference]: Finished difference Result 178 states and 274 transitions. [2022-11-23 14:33:01,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:33:01,704 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 66 [2022-11-23 14:33:01,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:01,711 INFO L225 Difference]: With dead ends: 178 [2022-11-23 14:33:01,712 INFO L226 Difference]: Without dead ends: 102 [2022-11-23 14:33:01,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:33:01,716 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 94 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:01,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 499 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:33:01,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-23 14:33:01,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2022-11-23 14:33:01,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 53 states have internal predecessors, (59), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2022-11-23 14:33:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 135 transitions. [2022-11-23 14:33:01,750 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 135 transitions. Word has length 66 [2022-11-23 14:33:01,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:01,752 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 135 transitions. [2022-11-23 14:33:01,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-23 14:33:01,753 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 135 transitions. [2022-11-23 14:33:01,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-23 14:33:01,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:01,757 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2022-11-23 14:33:01,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:33:01,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:01,965 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:01,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:01,966 INFO L85 PathProgramCache]: Analyzing trace with hash -921720928, now seen corresponding path program 1 times [2022-11-23 14:33:01,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:01,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371660536] [2022-11-23 14:33:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:01,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:33:02,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:02,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371660536] [2022-11-23 14:33:02,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371660536] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:02,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858941941] [2022-11-23 14:33:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:02,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:02,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:02,563 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:02,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:33:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:03,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:33:03,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:33:03,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:33:03,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858941941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:33:03,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:33:03,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-23 14:33:03,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556471110] [2022-11-23 14:33:03,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:33:03,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:33:03,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:03,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:33:03,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:33:03,185 INFO L87 Difference]: Start difference. First operand 92 states and 135 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 14:33:03,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:03,265 INFO L93 Difference]: Finished difference Result 179 states and 282 transitions. [2022-11-23 14:33:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:33:03,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2022-11-23 14:33:03,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:03,269 INFO L225 Difference]: With dead ends: 179 [2022-11-23 14:33:03,269 INFO L226 Difference]: Without dead ends: 101 [2022-11-23 14:33:03,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:33:03,273 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:03,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 220 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:33:03,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-23 14:33:03,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2022-11-23 14:33:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 48 states have (on average 1.25) internal successors, (60), 54 states have internal predecessors, (60), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2022-11-23 14:33:03,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 136 transitions. [2022-11-23 14:33:03,307 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 136 transitions. Word has length 67 [2022-11-23 14:33:03,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:03,308 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 136 transitions. [2022-11-23 14:33:03,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-23 14:33:03,308 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 136 transitions. [2022-11-23 14:33:03,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 14:33:03,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:03,310 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:03,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:33:03,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:03,517 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:03,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:03,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1389593974, now seen corresponding path program 1 times [2022-11-23 14:33:03,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:03,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783407995] [2022-11-23 14:33:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:03,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:33:04,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:04,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783407995] [2022-11-23 14:33:04,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783407995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:04,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138756858] [2022-11-23 14:33:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:04,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:04,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:04,097 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:04,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:33:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:04,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 14:33:04,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 14:33:04,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:33:04,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138756858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:33:04,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:33:04,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 10 [2022-11-23 14:33:04,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736598429] [2022-11-23 14:33:04,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:33:04,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:33:04,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:04,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:33:04,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:33:04,949 INFO L87 Difference]: Start difference. First operand 93 states and 136 transitions. Second operand has 8 states, 5 states have (on average 6.2) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-23 14:33:05,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:05,495 INFO L93 Difference]: Finished difference Result 178 states and 269 transitions. [2022-11-23 14:33:05,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:33:05,496 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 6.2) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 70 [2022-11-23 14:33:05,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:05,497 INFO L225 Difference]: With dead ends: 178 [2022-11-23 14:33:05,498 INFO L226 Difference]: Without dead ends: 99 [2022-11-23 14:33:05,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:33:05,499 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 39 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:05,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 555 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:33:05,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-23 14:33:05,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2022-11-23 14:33:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 55 states have internal predecessors, (61), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2022-11-23 14:33:05,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 137 transitions. [2022-11-23 14:33:05,515 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 137 transitions. Word has length 70 [2022-11-23 14:33:05,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:05,515 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 137 transitions. [2022-11-23 14:33:05,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 6.2) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-23 14:33:05,516 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 137 transitions. [2022-11-23 14:33:05,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-23 14:33:05,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:05,517 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:05,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:33:05,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:05,728 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:05,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:05,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1370238580, now seen corresponding path program 1 times [2022-11-23 14:33:05,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:05,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903411424] [2022-11-23 14:33:05,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:05,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:33:07,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:07,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903411424] [2022-11-23 14:33:07,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903411424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:07,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454324482] [2022-11-23 14:33:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:07,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:07,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:07,701 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:07,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:33:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:08,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-23 14:33:08,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:33:12,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:33:12,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454324482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:33:12,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1583734506] [2022-11-23 14:33:12,601 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-11-23 14:33:12,601 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:33:12,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:33:12,612 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:33:12,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:33:12,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:12,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:12,868 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-23 14:33:12,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2022-11-23 14:33:12,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:12,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:12,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 17 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 43 [2022-11-23 14:33:13,030 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 [2022-11-23 14:33:13,039 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 [2022-11-23 14:33:13,060 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 24 treesize of output 9 [2022-11-23 14:33:13,075 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 24 treesize of output 9 [2022-11-23 14:33:13,093 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 48 treesize of output 41 [2022-11-23 14:33:13,110 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 35 treesize of output 7 [2022-11-23 14:33:13,120 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 52 treesize of output 43 [2022-11-23 14:33:13,140 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 35 treesize of output 7 [2022-11-23 14:33:13,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-11-23 14:33:13,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-23 14:33:13,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-23 14:33:13,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-23 14:33:13,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-23 14:33:13,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-11-23 14:33:13,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-23 14:33:13,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-23 14:33:13,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 15 [2022-11-23 14:33:13,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-11-23 14:33:13,755 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 14:33:13,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:13,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 15 [2022-11-23 14:33:14,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:14,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:14,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:14,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-11-23 14:33:14,029 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 14:33:14,192 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 14:33:14,193 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 1 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 14:33:14,238 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 14:33:14,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-23 14:33:23,182 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 165 for LOIs [2022-11-23 14:33:25,278 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_linked_list_is_allocated with input of size 22 for LOIs [2022-11-23 14:33:25,352 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 [2022-11-23 14:33:25,367 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 [2022-11-23 14:33:25,383 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 24 treesize of output 9 [2022-11-23 14:33:25,400 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 24 treesize of output 9 [2022-11-23 14:33:25,430 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 35 treesize of output 7 [2022-11-23 14:33:25,450 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 48 treesize of output 41 [2022-11-23 14:33:25,473 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 52 treesize of output 43 [2022-11-23 14:33:25,498 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 35 treesize of output 7 [2022-11-23 14:33:25,522 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-23 14:33:25,524 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 15 for LOIs [2022-11-23 14:33:25,532 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-23 14:33:25,627 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:33:34,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1583734506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:33:34,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:33:34,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [9, 9, 6] total 42 [2022-11-23 14:33:34,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927105227] [2022-11-23 14:33:34,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:33:34,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 14:33:34,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:34,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 14:33:34,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1554, Unknown=1, NotChecked=0, Total=1722 [2022-11-23 14:33:34,797 INFO L87 Difference]: Start difference. First operand 94 states and 137 transitions. Second operand has 24 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-23 14:33:42,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:42,375 INFO L93 Difference]: Finished difference Result 223 states and 321 transitions. [2022-11-23 14:33:42,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 14:33:42,376 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 72 [2022-11-23 14:33:42,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:42,378 INFO L225 Difference]: With dead ends: 223 [2022-11-23 14:33:42,378 INFO L226 Difference]: Without dead ends: 127 [2022-11-23 14:33:42,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 176 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=274, Invalid=2275, Unknown=1, NotChecked=0, Total=2550 [2022-11-23 14:33:42,380 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 180 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:42,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 693 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-23 14:33:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-23 14:33:42,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2022-11-23 14:33:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 73 states have internal predecessors, (81), 39 states have call successors, (39), 10 states have call predecessors, (39), 13 states have return successors, (49), 37 states have call predecessors, (49), 37 states have call successors, (49) [2022-11-23 14:33:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2022-11-23 14:33:42,412 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2022-11-23 14:33:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:42,413 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2022-11-23 14:33:42,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-23 14:33:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2022-11-23 14:33:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 14:33:42,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:42,415 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:42,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 14:33:42,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 14:33:42,619 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:33:42,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:42,619 INFO L85 PathProgramCache]: Analyzing trace with hash -782095385, now seen corresponding path program 1 times [2022-11-23 14:33:42,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:42,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308484551] [2022-11-23 14:33:42,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:42,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:33:43,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:43,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308484551] [2022-11-23 14:33:43,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308484551] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:43,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646830996] [2022-11-23 14:33:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:43,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:43,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:43,066 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:43,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:33:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:43,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-23 14:33:43,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:44,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2022-11-23 14:33:44,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 9 [2022-11-23 14:33:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 14:33:44,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:44,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:33:44,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2022-11-23 14:33:44,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:33:44,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-23 14:33:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 14:33:44,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646830996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:33:44,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2008976507] [2022-11-23 14:33:44,791 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-11-23 14:33:44,791 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:33:44,792 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:33:44,792 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:33:44,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:33:44,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:44,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:44,965 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-23 14:33:44,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2022-11-23 14:33:44,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 17 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 43 [2022-11-23 14:33:45,090 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 24 treesize of output 9 [2022-11-23 14:33:45,099 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 [2022-11-23 14:33:45,107 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 [2022-11-23 14:33:45,123 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 24 treesize of output 9 [2022-11-23 14:33:45,140 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 52 treesize of output 43 [2022-11-23 14:33:45,155 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 35 treesize of output 7 [2022-11-23 14:33:45,169 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 35 treesize of output 7 [2022-11-23 14:33:45,179 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 48 treesize of output 41 [2022-11-23 14:33:45,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-11-23 14:33:45,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-23 14:33:45,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-23 14:33:45,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-23 14:33:45,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-23 14:33:45,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-23 14:33:45,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-23 14:33:45,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-11-23 14:33:45,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 15 [2022-11-23 14:33:45,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:45,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-11-23 14:33:45,741 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 14:33:45,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:33:45,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 31 [2022-11-23 14:33:45,960 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-23 14:33:45,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 18 [2022-11-23 14:33:45,984 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 14:33:46,162 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 14:33:46,162 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 1 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 14:33:46,206 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 14:33:46,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-23 14:34:04,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:04,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:04,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:09,903 WARN L233 SmtUtils]: Spent 5.20s on a formula simplification. DAG size of input: 775 DAG size of output: 1 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 14:34:09,904 INFO L321 Elim1Store]: treesize reduction 4691, result has 0.0 percent of original size [2022-11-23 14:34:09,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 24 select indices, 24 select index equivalence classes, 12 disjoint index pairs (out of 276 index pairs), introduced 29 new quantified variables, introduced 302 case distinctions, treesize of input 3537 treesize of output 1 [2022-11-23 14:34:17,306 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 200 for LOIs [2022-11-23 14:34:18,540 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-23 14:34:19,343 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_linked_list_is_allocated with input of size 22 for LOIs [2022-11-23 14:34:19,404 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 [2022-11-23 14:34:19,418 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 24 treesize of output 9 [2022-11-23 14:34:19,429 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 [2022-11-23 14:34:19,444 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 24 treesize of output 9 [2022-11-23 14:34:19,472 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 52 treesize of output 43 [2022-11-23 14:34:19,488 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 35 treesize of output 7 [2022-11-23 14:34:19,507 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 48 treesize of output 41 [2022-11-23 14:34:19,531 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 35 treesize of output 7 [2022-11-23 14:34:19,542 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 40 for LOIs [2022-11-23 14:34:19,555 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 15 for LOIs [2022-11-23 14:34:19,557 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-23 14:34:19,622 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:34:41,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2008976507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:41,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:34:41,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [5, 12, 9] total 48 [2022-11-23 14:34:41,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192980311] [2022-11-23 14:34:41,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:41,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-23 14:34:41,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:41,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-23 14:34:41,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2022-11-23 14:34:41,187 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand has 32 states, 21 states have (on average 1.380952380952381) internal successors, (29), 19 states have internal predecessors, (29), 10 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-23 14:34:49,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:49,255 INFO L93 Difference]: Finished difference Result 236 states and 335 transitions. [2022-11-23 14:34:49,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 14:34:49,255 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 21 states have (on average 1.380952380952381) internal successors, (29), 19 states have internal predecessors, (29), 10 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) Word has length 73 [2022-11-23 14:34:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:49,258 INFO L225 Difference]: With dead ends: 236 [2022-11-23 14:34:49,258 INFO L226 Difference]: Without dead ends: 159 [2022-11-23 14:34:49,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 158 SyntacticMatches, 18 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=269, Invalid=2593, Unknown=0, NotChecked=0, Total=2862 [2022-11-23 14:34:49,261 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 169 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:49,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 636 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2033 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-23 14:34:49,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-23 14:34:49,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 143. [2022-11-23 14:34:49,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 88 states have internal predecessors, (102), 45 states have call successors, (45), 12 states have call predecessors, (45), 15 states have return successors, (55), 44 states have call predecessors, (55), 43 states have call successors, (55) [2022-11-23 14:34:49,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 202 transitions. [2022-11-23 14:34:49,336 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 202 transitions. Word has length 73 [2022-11-23 14:34:49,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:49,337 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 202 transitions. [2022-11-23 14:34:49,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 21 states have (on average 1.380952380952381) internal successors, (29), 19 states have internal predecessors, (29), 10 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-23 14:34:49,337 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 202 transitions. [2022-11-23 14:34:49,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 14:34:49,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:49,339 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:34:49,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:34:49,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 14:34:49,547 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:34:49,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:49,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1372413686, now seen corresponding path program 1 times [2022-11-23 14:34:49,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:49,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207876965] [2022-11-23 14:34:49,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:49,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 14:34:51,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:51,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207876965] [2022-11-23 14:34:51,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207876965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:34:51,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837307628] [2022-11-23 14:34:51,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:51,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:34:51,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:34:51,401 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:34:51,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:34:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:52,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-23 14:34:52,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:34:52,245 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:34:52,246 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-23 14:34:52,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 14 treesize of output 14 [2022-11-23 14:34:52,417 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:34:52,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:34:52,426 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2022-11-23 14:34:52,498 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-23 14:34:52,498 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 87 [2022-11-23 14:34:52,506 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 10 treesize of output 9 [2022-11-23 14:34:52,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 26 treesize of output 30 [2022-11-23 14:34:52,613 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-11-23 14:34:52,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 31 [2022-11-23 14:34:52,618 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:34:52,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2022-11-23 14:34:52,697 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-23 14:34:52,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:34:52,836 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_17 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26|))) (let ((.cse0 (select .cse1 0))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_18) .cse0 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_18) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= (select v_DerPreprocessor_18 24) (select .cse1 24)) (not (= |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| .cse0)))))) is different from true [2022-11-23 14:34:53,358 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_19 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26|))) (let ((.cse0 (select .cse1 0))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_19) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_20) .cse0 v_DerPreprocessor_19) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_20) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (not (= |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| .cse0)) (= (select .cse1 24) (select v_DerPreprocessor_20 24)))))) (exists ((v_DerPreprocessor_17 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| Int)) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27|))) (let ((.cse2 (select .cse3 0))) (and (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| v_DerPreprocessor_18) .cse2 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| v_DerPreprocessor_18) .cse2)) (not (= .cse2 |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27|)) (= (select .cse3 24) (select v_DerPreprocessor_18 24))))))) is different from true [2022-11-23 14:34:53,389 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_19 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26|))) (let ((.cse0 (select .cse1 0))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_19) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_20) .cse0 v_DerPreprocessor_19) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_20) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (not (= |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| .cse0)) (= (select .cse1 24) (select v_DerPreprocessor_20 24)))))) (exists ((v_DerPreprocessor_17 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| Int)) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27|))) (let ((.cse2 (select .cse3 0))) (and (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| v_DerPreprocessor_18) .cse2 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| v_DerPreprocessor_18) .cse2)) (not (= .cse2 |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27|)) (= (select .cse3 24) (select v_DerPreprocessor_18 24)))))) (not (= (mod |c_assume_abort_if_not_#in~cond| 256) 0))) is different from true [2022-11-23 14:34:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:34:53,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:34:53,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 54 treesize of output 46 [2022-11-23 14:34:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 14:34:53,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837307628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:34:53,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [264632925] [2022-11-23 14:34:53,987 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-11-23 14:34:53,987 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:34:53,988 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:34:53,988 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:34:53,988 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:34:54,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:54,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:54,129 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-23 14:34:54,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2022-11-23 14:34:54,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:54,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:54,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 17 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 43 [2022-11-23 14:34:54,236 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 24 treesize of output 9 [2022-11-23 14:34:54,246 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 24 treesize of output 9 [2022-11-23 14:34:54,253 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 [2022-11-23 14:34:54,261 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 [2022-11-23 14:34:54,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:54,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:54,368 INFO L321 Elim1Store]: treesize reduction 64, result has 41.8 percent of original size [2022-11-23 14:34:54,369 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 61 [2022-11-23 14:34:54,386 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-23 14:34:54,437 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-23 14:34:54,437 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 1 case distinctions, treesize of input 35 treesize of output 17 [2022-11-23 14:34:54,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 14:34:54,499 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-23 14:34:54,499 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 1 case distinctions, treesize of input 35 treesize of output 17 [2022-11-23 14:34:54,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:54,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:54,593 INFO L321 Elim1Store]: treesize reduction 66, result has 40.0 percent of original size [2022-11-23 14:34:54,594 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 59 [2022-11-23 14:34:54,629 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-23 14:34:54,672 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 14:34:54,672 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 1 case distinctions, treesize of input 29 treesize of output 17 [2022-11-23 14:34:54,728 INFO L321 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-11-23 14:34:54,729 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 1 case distinctions, treesize of input 59 treesize of output 29 [2022-11-23 14:34:54,782 INFO L321 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-11-23 14:34:54,782 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 1 case distinctions, treesize of input 59 treesize of output 29 [2022-11-23 14:34:54,818 INFO L321 Elim1Store]: treesize reduction 31, result has 48.3 percent of original size [2022-11-23 14:34:54,819 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 1 case distinctions, treesize of input 53 treesize of output 39 [2022-11-23 14:34:54,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 14:34:54,869 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-23 14:34:54,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 35 treesize of output 17 [2022-11-23 14:34:54,885 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 14:34:54,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 29 treesize of output 17 [2022-11-23 14:34:54,920 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-23 14:34:54,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 35 treesize of output 17 [2022-11-23 14:34:54,956 INFO L321 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2022-11-23 14:34:54,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 33 treesize of output 29 [2022-11-23 14:34:54,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:54,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:54,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-11-23 14:34:55,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-23 14:34:55,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-23 14:34:55,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-23 14:34:55,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-23 14:34:55,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-11-23 14:34:55,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-23 14:34:55,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:55,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-23 14:34:55,339 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 14:34:55,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-23 14:34:55,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 11 [2022-11-23 14:34:56,180 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 106 for LOIs [2022-11-23 14:34:57,305 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_linked_list_is_allocated with input of size 156 for LOIs [2022-11-23 14:35:00,091 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-23 14:35:00,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 17 [2022-11-23 14:35:00,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:00,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 53 treesize of output 23 [2022-11-23 14:35:00,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 71 treesize of output 19 [2022-11-23 14:35:00,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 71 treesize of output 19 [2022-11-23 14:35:00,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 14:35:00,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,235 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 35 treesize of output 7 [2022-11-23 14:35:00,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,245 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 29 treesize of output 17 [2022-11-23 14:35:00,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 33 treesize of output 19 [2022-11-23 14:35:00,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,282 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 35 treesize of output 7 [2022-11-23 14:35:00,878 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-23 14:35:00,880 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 134 for LOIs [2022-11-23 14:35:00,971 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-23 14:35:01,052 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:35:08,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [264632925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:08,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:35:08,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [9, 17, 8] total 51 [2022-11-23 14:35:08,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560176130] [2022-11-23 14:35:08,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:08,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 14:35:08,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:08,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 14:35:08,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2087, Unknown=11, NotChecked=282, Total=2550 [2022-11-23 14:35:08,176 INFO L87 Difference]: Start difference. First operand 143 states and 202 transitions. Second operand has 23 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-23 14:35:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:15,324 INFO L93 Difference]: Finished difference Result 258 states and 362 transitions. [2022-11-23 14:35:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 14:35:15,324 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 73 [2022-11-23 14:35:15,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:15,326 INFO L225 Difference]: With dead ends: 258 [2022-11-23 14:35:15,326 INFO L226 Difference]: Without dead ends: 178 [2022-11-23 14:35:15,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 167 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=258, Invalid=2703, Unknown=21, NotChecked=324, Total=3306 [2022-11-23 14:35:15,329 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 108 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:15,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 330 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-23 14:35:15,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-23 14:35:15,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 157. [2022-11-23 14:35:15,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 94 states have (on average 1.2659574468085106) internal successors, (119), 100 states have internal predecessors, (119), 46 states have call successors, (46), 13 states have call predecessors, (46), 16 states have return successors, (50), 45 states have call predecessors, (50), 44 states have call successors, (50) [2022-11-23 14:35:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 215 transitions. [2022-11-23 14:35:15,404 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 215 transitions. Word has length 73 [2022-11-23 14:35:15,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:15,405 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 215 transitions. [2022-11-23 14:35:15,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-23 14:35:15,405 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 215 transitions. [2022-11-23 14:35:15,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-23 14:35:15,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:15,407 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:15,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:15,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 14:35:15,609 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:35:15,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:15,610 INFO L85 PathProgramCache]: Analyzing trace with hash -714667099, now seen corresponding path program 1 times [2022-11-23 14:35:15,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:15,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611664401] [2022-11-23 14:35:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:15,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 14:35:16,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:16,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611664401] [2022-11-23 14:35:16,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611664401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:35:16,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913296968] [2022-11-23 14:35:16,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:16,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:35:16,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:35:16,058 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:35:16,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8246a1e-202c-4a8e-b5fe-82e36122d908/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:35:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:16,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 14:35:16,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 14:35:16,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:35:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-23 14:35:17,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913296968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:35:17,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1105156659] [2022-11-23 14:35:17,101 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-11-23 14:35:17,101 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:35:17,102 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:35:17,102 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:35:17,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:35:17,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:17,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:17,201 INFO L321 Elim1Store]: treesize reduction 83, result has 33.6 percent of original size [2022-11-23 14:35:17,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 64 [2022-11-23 14:35:17,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:17,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:17,331 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-23 14:35:17,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2022-11-23 14:35:17,405 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 [2022-11-23 14:35:17,416 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 24 treesize of output 9 [2022-11-23 14:35:17,422 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 [2022-11-23 14:35:17,433 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 24 treesize of output 9 [2022-11-23 14:35:17,474 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-23 14:35:17,475 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 1 case distinctions, treesize of input 35 treesize of output 17 [2022-11-23 14:35:17,482 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-23 14:35:17,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 14:35:17,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:17,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:17,569 INFO L321 Elim1Store]: treesize reduction 66, result has 40.0 percent of original size [2022-11-23 14:35:17,570 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 59 [2022-11-23 14:35:17,612 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-23 14:35:17,612 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 1 case distinctions, treesize of input 35 treesize of output 17 [2022-11-23 14:35:17,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:17,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:17,684 INFO L321 Elim1Store]: treesize reduction 64, result has 41.8 percent of original size [2022-11-23 14:35:17,685 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 61 [2022-11-23 14:35:17,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 14:35:17,777 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 14:35:17,777 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 1 case distinctions, treesize of input 29 treesize of output 27 [2022-11-23 14:35:17,826 INFO L321 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-11-23 14:35:17,827 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 1 case distinctions, treesize of input 47 treesize of output 29 [2022-11-23 14:35:17,874 INFO L321 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-11-23 14:35:17,875 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 1 case distinctions, treesize of input 47 treesize of output 29 [2022-11-23 14:35:17,897 INFO L321 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2022-11-23 14:35:17,898 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 1 case distinctions, treesize of input 41 treesize of output 23 [2022-11-23 14:35:17,907 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-23 14:35:17,934 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-23 14:35:17,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 35 treesize of output 17 [2022-11-23 14:35:17,967 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-23 14:35:17,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 35 treesize of output 17 [2022-11-23 14:35:17,981 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 14:35:17,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 29 treesize of output 17 [2022-11-23 14:35:18,009 INFO L321 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2022-11-23 14:35:18,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 33 treesize of output 29 [2022-11-23 14:35:18,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-11-23 14:35:18,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-23 14:35:18,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-23 14:35:18,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-23 14:35:18,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-11-23 14:35:18,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-23 14:35:18,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-23 14:35:18,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:18,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-23 14:35:18,335 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 14:35:18,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-23 14:35:18,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 9 treesize of output 11 [2022-11-23 14:35:19,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:19,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:19,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:19,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:19,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:19,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:19,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:19,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:19,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:19,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:19,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:19,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:03,773 WARN L233 SmtUtils]: Spent 43.92s on a formula simplification. DAG size of input: 473 DAG size of output: 265 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 14:36:03,775 INFO L321 Elim1Store]: treesize reduction 2284, result has 29.0 percent of original size [2022-11-23 14:36:03,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 20 select indices, 20 select index equivalence classes, 15 disjoint index pairs (out of 190 index pairs), introduced 21 new quantified variables, introduced 178 case distinctions, treesize of input 1940 treesize of output 2171 [2022-11-23 14:36:03,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:03,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:03,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:03,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:03,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:03,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:03,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:03,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:03,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:03,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:03,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:03,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:39:04,704 WARN L233 SmtUtils]: Spent 3.01m on a formula simplification. DAG size of input: 703 DAG size of output: 381 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 14:39:04,706 INFO L321 Elim1Store]: treesize reduction 3329, result has 32.2 percent of original size [2022-11-23 14:39:04,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 20 select indices, 20 select index equivalence classes, 16 disjoint index pairs (out of 190 index pairs), introduced 22 new quantified variables, introduced 215 case distinctions, treesize of input 3110 treesize of output 3808 [2022-11-23 14:39:05,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:10,204 INFO L321 Elim1Store]: treesize reduction 459, result has 34.4 percent of original size [2022-11-23 14:39:10,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 524 treesize of output 685 [2022-11-23 14:39:11,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:13,108 INFO L321 Elim1Store]: treesize reduction 459, result has 34.4 percent of original size [2022-11-23 14:39:13,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 524 treesize of output 690