./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:48:14,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:48:14,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:48:14,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:48:14,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:48:14,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:48:14,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:48:14,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:48:14,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:48:14,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:48:14,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:48:14,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:48:14,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:48:14,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:48:14,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:48:14,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:48:14,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:48:14,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:48:14,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:48:14,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:48:14,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:48:14,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:48:14,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:48:14,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:48:14,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:48:14,560 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:48:14,560 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:48:14,561 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:48:14,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:48:14,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:48:14,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:48:14,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:48:14,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:48:14,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:48:14,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:48:14,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:48:14,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:48:14,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:48:14,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:48:14,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:48:14,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:48:14,572 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 19:48:14,599 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:48:14,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:48:14,600 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:48:14,600 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:48:14,601 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:48:14,601 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:48:14,601 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:48:14,602 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:48:14,602 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:48:14,602 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:48:14,602 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:48:14,602 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:48:14,603 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:48:14,603 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:48:14,603 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:48:14,603 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:48:14,604 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:48:14,604 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:48:14,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:48:14,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:48:14,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:48:14,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:48:14,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:48:14,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:48:14,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:48:14,606 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:48:14,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:48:14,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:48:14,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:48:14,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:48:14,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:48:14,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:48:14,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:48:14,608 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:48:14,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:48:14,608 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:48:14,608 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:48:14,609 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:48:14,609 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 [2021-11-25 19:48:14,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:48:14,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:48:14,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:48:14,881 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:48:14,881 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:48:14,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2021-11-25 19:48:14,952 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/data/c4e6fba48/0ffd369572b24f10991eb50faf60553d/FLAG89302efdd [2021-11-25 19:48:15,644 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:48:15,647 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2021-11-25 19:48:15,690 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/data/c4e6fba48/0ffd369572b24f10991eb50faf60553d/FLAG89302efdd [2021-11-25 19:48:15,741 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/data/c4e6fba48/0ffd369572b24f10991eb50faf60553d [2021-11-25 19:48:15,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:48:15,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:48:15,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:48:15,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:48:15,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:48:15,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:48:15" (1/1) ... [2021-11-25 19:48:15,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be569cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:15, skipping insertion in model container [2021-11-25 19:48:15,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:48:15" (1/1) ... [2021-11-25 19:48:15,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:48:15,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:48:16,192 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2021-11-25 19:48:16,200 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2021-11-25 19:48:16,923 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:16,923 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:16,924 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:16,925 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:16,926 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:16,940 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:16,941 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:16,943 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:16,943 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:16,945 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:16,946 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:16,947 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:16,948 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:17,282 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 19:48:17,283 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 19:48:17,284 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 19:48:17,285 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 19:48:17,287 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 19:48:17,287 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 19:48:17,288 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 19:48:17,289 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 19:48:17,289 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 19:48:17,290 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 19:48:17,495 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 19:48:17,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:48:17,548 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:48:17,574 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2021-11-25 19:48:17,575 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2021-11-25 19:48:17,645 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:17,649 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:17,650 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:17,651 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:17,651 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:17,669 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:17,670 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:17,671 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:17,671 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:17,672 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:17,673 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:17,673 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:17,673 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:48:17,713 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 19:48:17,714 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 19:48:17,715 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 19:48:17,716 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 19:48:17,721 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 19:48:17,722 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 19:48:17,723 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 19:48:17,723 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 19:48:17,724 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 19:48:17,725 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 19:48:17,759 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 19:48:17,782 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:48:18,036 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:48:18,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:18 WrapperNode [2021-11-25 19:48:18,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:48:18,037 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:48:18,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:48:18,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:48:18,045 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:18" (1/1) ... [2021-11-25 19:48:18,163 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:18" (1/1) ... [2021-11-25 19:48:18,209 INFO L137 Inliner]: procedures = 679, calls = 1041, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 142 [2021-11-25 19:48:18,210 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:48:18,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:48:18,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:48:18,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:48:18,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:18" (1/1) ... [2021-11-25 19:48:18,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:18" (1/1) ... [2021-11-25 19:48:18,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:18" (1/1) ... [2021-11-25 19:48:18,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:18" (1/1) ... [2021-11-25 19:48:18,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:18" (1/1) ... [2021-11-25 19:48:18,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:18" (1/1) ... [2021-11-25 19:48:18,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:18" (1/1) ... [2021-11-25 19:48:18,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:48:18,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:48:18,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:48:18,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:48:18,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:18" (1/1) ... [2021-11-25 19:48:18,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:48:18,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:18,316 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:48:18,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:48:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:48:18,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 19:48:18,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 19:48:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-25 19:48:18,362 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-25 19:48:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:48:18,362 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-25 19:48:18,362 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-25 19:48:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:48:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:48:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:48:18,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:48:18,363 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:48:18,363 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:48:18,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:48:18,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:48:18,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:48:18,364 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-25 19:48:18,364 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-25 19:48:18,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:48:18,665 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:48:18,667 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:48:18,908 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:48:19,021 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:48:19,021 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 19:48:19,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:48:19 BoogieIcfgContainer [2021-11-25 19:48:19,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:48:19,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:48:19,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:48:19,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:48:19,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:48:15" (1/3) ... [2021-11-25 19:48:19,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792404b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:48:19, skipping insertion in model container [2021-11-25 19:48:19,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:48:18" (2/3) ... [2021-11-25 19:48:19,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792404b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:48:19, skipping insertion in model container [2021-11-25 19:48:19,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:48:19" (3/3) ... [2021-11-25 19:48:19,039 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rbegin_harness.i [2021-11-25 19:48:19,048 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:48:19,049 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:48:19,109 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:48:19,116 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:48:19,116 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:48:19,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 19:48:19,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 19:48:19,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:19,148 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:19,148 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:19,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:19,153 INFO L85 PathProgramCache]: Analyzing trace with hash 2063254078, now seen corresponding path program 1 times [2021-11-25 19:48:19,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:19,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107283380] [2021-11-25 19:48:19,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:19,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:48:19,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:19,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107283380] [2021-11-25 19:48:19,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107283380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:19,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790079854] [2021-11-25 19:48:19,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:19,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:19,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:19,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:19,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:48:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:19,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-25 19:48:19,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:20,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:20,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:20,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:20,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:20,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:20,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:20,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:20,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:20,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:20,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:20,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2021-11-25 19:48:20,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:20,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:20,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:20,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:20,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:20,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:20,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-25 19:48:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:48:22,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:22,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790079854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:22,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:48:22,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-11-25 19:48:22,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168652491] [2021-11-25 19:48:22,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:22,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:48:22,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:22,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:48:22,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:48:22,256 INFO L87 Difference]: Start difference. First operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-25 19:48:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:22,536 INFO L93 Difference]: Finished difference Result 104 states and 149 transitions. [2021-11-25 19:48:22,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:48:22,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2021-11-25 19:48:22,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:22,552 INFO L225 Difference]: With dead ends: 104 [2021-11-25 19:48:22,552 INFO L226 Difference]: Without dead ends: 62 [2021-11-25 19:48:22,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:48:22,568 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 14 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:22,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 150 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 42 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2021-11-25 19:48:22,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-25 19:48:22,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2021-11-25 19:48:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 19:48:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2021-11-25 19:48:22,624 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 37 [2021-11-25 19:48:22,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:22,625 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2021-11-25 19:48:22,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-25 19:48:22,625 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2021-11-25 19:48:22,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-25 19:48:22,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:22,628 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:22,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 19:48:22,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:22,857 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:22,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:22,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1943617686, now seen corresponding path program 1 times [2021-11-25 19:48:22,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:22,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98288109] [2021-11-25 19:48:22,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:22,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 19:48:23,108 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:23,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98288109] [2021-11-25 19:48:23,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98288109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:23,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408215409] [2021-11-25 19:48:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:23,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:23,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:23,112 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:23,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:48:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:23,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-25 19:48:23,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:23,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:23,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:23,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-25 19:48:23,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-11-25 19:48:23,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-25 19:48:23,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-11-25 19:48:23,653 INFO L354 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2021-11-25 19:48:23,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 110 [2021-11-25 19:48:23,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 102 [2021-11-25 19:48:23,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 39 [2021-11-25 19:48:23,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 44 [2021-11-25 19:48:23,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-11-25 19:48:23,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:23,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-25 19:48:23,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:48:25,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:25,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:25,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:25,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:25,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:25,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:25,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:25,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:25,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:25,574 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-25 19:48:25,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 100 treesize of output 40 [2021-11-25 19:48:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:48:25,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:29,773 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_223 Int) (v_ArrVal_221 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_221) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) (+ 8 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) 0)) (forall ((v_ArrVal_226 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) (+ 8 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) 0)) (or (forall ((v_ArrVal_226 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_221 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_221) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|) 0)))) (or (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_221 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_221) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) (+ 16 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) 0)) (or (forall ((v_ArrVal_223 Int) (v_ArrVal_221 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_221) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 24)) 0))) (forall ((v_ArrVal_226 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 24)) 0)))) (forall ((v_ArrVal_226 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) (+ 16 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) 0))) is different from false [2021-11-25 19:48:32,049 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_217 Int)) (or (<= |c_#StackHeapBarrier| v_ArrVal_217) (and (forall ((v_ArrVal_223 Int) (v_ArrVal_221 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0)))) (store (store .cse0 v_ArrVal_217 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_217 v_ArrVal_221) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_223))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) (+ 8 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) 0)) (or (forall ((v_ArrVal_226 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_217)))) (store (store .cse1 v_ArrVal_217 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse1 v_ArrVal_217 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_217))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 24)) 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_221 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0)))) (store (store .cse2 v_ArrVal_217 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse2 v_ArrVal_217 v_ArrVal_221) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_223))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 24)) 0)))) (forall ((v_ArrVal_226 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_217)))) (store (store .cse3 v_ArrVal_217 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse3 v_ArrVal_217 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_217))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) (+ 16 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) 0)) (forall ((v_ArrVal_226 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_217)))) (store (store .cse4 v_ArrVal_217 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_217 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_217))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) (+ 8 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) 0)) (or (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 0))) (or (forall ((v_ArrVal_223 Int) (v_ArrVal_221 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0)))) (store (store .cse5 v_ArrVal_217 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse5 v_ArrVal_217 v_ArrVal_221) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_223))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_226 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_217)))) (store (store .cse6 v_ArrVal_217 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse6 v_ArrVal_217 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_217))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|) 0)))) (forall ((v_ArrVal_223 Int) (v_ArrVal_221 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0)))) (store (store .cse7 v_ArrVal_217 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse7 v_ArrVal_217 v_ArrVal_221) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_223))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) (+ 16 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) 0))) (= v_ArrVal_217 0))) is different from false [2021-11-25 19:48:32,441 INFO L354 Elim1Store]: treesize reduction 78, result has 27.1 percent of original size [2021-11-25 19:48:32,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 500 treesize of output 385 [2021-11-25 19:48:32,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:32,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1019 treesize of output 985 [2021-11-25 19:48:32,593 INFO L354 Elim1Store]: treesize reduction 78, result has 27.1 percent of original size [2021-11-25 19:48:32,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 985 treesize of output 869 [2021-11-25 19:48:32,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:48:32,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1503 treesize of output 1469 [2021-11-25 19:48:32,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1700 treesize of output 1684 [2021-11-25 19:48:32,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1684 treesize of output 1676 [2021-11-25 19:48:32,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1676 treesize of output 1668 [2021-11-25 19:48:32,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1736 treesize of output 1720 [2021-11-25 19:48:32,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1752 treesize of output 1744 [2021-11-25 19:48:32,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1808 treesize of output 1792 [2021-11-25 19:48:32,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1792 treesize of output 1788 [2021-11-25 19:48:33,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1820 treesize of output 1812 [2021-11-25 19:48:33,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1812 treesize of output 1808 [2021-11-25 19:48:33,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1834 treesize of output 1830 [2021-11-25 19:48:33,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1830 treesize of output 1828 [2021-11-25 19:48:33,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1854 treesize of output 1850 [2021-11-25 19:48:33,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1850 treesize of output 1848 [2021-11-25 19:48:33,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1912 treesize of output 1896 [2021-11-25 19:48:33,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1896 treesize of output 1888 [2021-11-25 19:48:33,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1888 treesize of output 1880 [2021-11-25 19:48:35,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 19:48:35,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:35,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:35,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:35,628 INFO L354 Elim1Store]: treesize reduction 82, result has 58.4 percent of original size [2021-11-25 19:48:35,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 214 treesize of output 292 [2021-11-25 19:48:36,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:36,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:36,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:36,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 19:48:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2021-11-25 19:48:36,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408215409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:36,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1713970235] [2021-11-25 19:48:36,732 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-25 19:48:36,732 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:36,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:36,742 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:36,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:36,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:36,868 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-25 19:48:36,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-25 19:48:36,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:36,976 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-25 19:48:36,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-25 19:48:37,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-25 19:48:37,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:37,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-25 19:48:37,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-25 19:48:37,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:37,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:37,597 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 19:48:37,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2021-11-25 19:48:37,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-25 19:48:37,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:37,698 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 19:48:37,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2021-11-25 19:48:37,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,827 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-25 19:48:37,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-25 19:48:37,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2021-11-25 19:48:37,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 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 [2021-11-25 19:48:37,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:37,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:37,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:38,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:38,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 59 treesize of output 13 [2021-11-25 19:48:38,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:38,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:38,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:38,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:38,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:38,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:48:38,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:38,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:38,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:38,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 59 treesize of output 13 [2021-11-25 19:48:38,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:48:38,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:38,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:38,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:38,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:38,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:48:38,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:38,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:38,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:38,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:38,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:38,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:38,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:38,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:38,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:38,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:38,892 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 55 for LOIs [2021-11-25 19:48:39,137 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 144 for LOIs [2021-11-25 19:48:39,192 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2021-11-25 19:48:39,218 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:41,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1713970235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:41,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:48:41,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 9, 8] total 30 [2021-11-25 19:48:41,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032128385] [2021-11-25 19:48:41,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:41,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 19:48:41,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:41,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 19:48:41,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=669, Unknown=2, NotChecked=106, Total=870 [2021-11-25 19:48:41,852 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-25 19:48:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:42,412 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2021-11-25 19:48:42,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 19:48:42,413 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2021-11-25 19:48:42,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:42,416 INFO L225 Difference]: With dead ends: 89 [2021-11-25 19:48:42,417 INFO L226 Difference]: Without dead ends: 52 [2021-11-25 19:48:42,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=102, Invalid=716, Unknown=2, NotChecked=110, Total=930 [2021-11-25 19:48:42,423 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:42,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 280 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2021-11-25 19:48:42,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-25 19:48:42,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-11-25 19:48:42,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-25 19:48:42,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2021-11-25 19:48:42,460 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 38 [2021-11-25 19:48:42,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:42,461 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2021-11-25 19:48:42,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-25 19:48:42,461 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2021-11-25 19:48:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 19:48:42,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:42,463 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:42,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:42,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:42,672 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:42,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:42,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1859140634, now seen corresponding path program 1 times [2021-11-25 19:48:42,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:42,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874657554] [2021-11-25 19:48:42,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:42,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:48:42,817 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:42,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874657554] [2021-11-25 19:48:42,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874657554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:42,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746001639] [2021-11-25 19:48:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:42,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:42,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:42,832 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:42,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:48:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:42,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:48:42,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:48:43,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:43,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746001639] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:43,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:48:43,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-25 19:48:43,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598528869] [2021-11-25 19:48:43,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:43,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:48:43,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:43,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:48:43,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:48:43,082 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:48:43,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:43,200 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2021-11-25 19:48:43,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:48:43,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 39 [2021-11-25 19:48:43,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:43,202 INFO L225 Difference]: With dead ends: 88 [2021-11-25 19:48:43,202 INFO L226 Difference]: Without dead ends: 53 [2021-11-25 19:48:43,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:48:43,204 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 35 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:43,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 151 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:48:43,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-25 19:48:43,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-25 19:48:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-25 19:48:43,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-11-25 19:48:43,217 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 39 [2021-11-25 19:48:43,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:43,218 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-11-25 19:48:43,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:48:43,218 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-11-25 19:48:43,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 19:48:43,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:43,220 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:43,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:43,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:43,435 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:43,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:43,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2129804384, now seen corresponding path program 1 times [2021-11-25 19:48:43,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:43,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040154886] [2021-11-25 19:48:43,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:43,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:48:43,580 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:43,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040154886] [2021-11-25 19:48:43,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040154886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:43,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853663714] [2021-11-25 19:48:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:43,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:43,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:43,582 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:43,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:48:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:43,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:48:43,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:48:43,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:43,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853663714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:43,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:48:43,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-25 19:48:43,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459911303] [2021-11-25 19:48:43,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:43,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:48:43,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:43,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:48:43,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:48:43,842 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:48:44,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:44,031 INFO L93 Difference]: Finished difference Result 105 states and 143 transitions. [2021-11-25 19:48:44,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:48:44,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2021-11-25 19:48:44,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:44,035 INFO L225 Difference]: With dead ends: 105 [2021-11-25 19:48:44,035 INFO L226 Difference]: Without dead ends: 65 [2021-11-25 19:48:44,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:48:44,037 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:44,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 182 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:48:44,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-25 19:48:44,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2021-11-25 19:48:44,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-25 19:48:44,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-11-25 19:48:44,052 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2021-11-25 19:48:44,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:44,052 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-11-25 19:48:44,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:48:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-11-25 19:48:44,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 19:48:44,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:44,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:44,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:44,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:44,267 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:44,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:44,268 INFO L85 PathProgramCache]: Analyzing trace with hash -647115340, now seen corresponding path program 1 times [2021-11-25 19:48:44,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:44,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777875862] [2021-11-25 19:48:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:44,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:48:44,386 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:44,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777875862] [2021-11-25 19:48:44,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777875862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:44,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978172708] [2021-11-25 19:48:44,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:44,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:44,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:44,394 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:44,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:48:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:44,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:48:44,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:48:44,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:48:44,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978172708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:44,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:48:44,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-25 19:48:44,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472883336] [2021-11-25 19:48:44,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:44,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:48:44,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:44,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:48:44,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:48:44,648 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:48:44,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:44,697 INFO L93 Difference]: Finished difference Result 106 states and 147 transitions. [2021-11-25 19:48:44,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:48:44,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2021-11-25 19:48:44,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:44,702 INFO L225 Difference]: With dead ends: 106 [2021-11-25 19:48:44,702 INFO L226 Difference]: Without dead ends: 64 [2021-11-25 19:48:44,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:48:44,707 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:44,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 95 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:48:44,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-25 19:48:44,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2021-11-25 19:48:44,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 36 states have internal predecessors, (42), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-25 19:48:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2021-11-25 19:48:44,734 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 42 [2021-11-25 19:48:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:44,736 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2021-11-25 19:48:44,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-25 19:48:44,736 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2021-11-25 19:48:44,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 19:48:44,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:44,746 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:44,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:44,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:44,952 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:48:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:44,952 INFO L85 PathProgramCache]: Analyzing trace with hash 625474841, now seen corresponding path program 1 times [2021-11-25 19:48:44,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:44,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340259103] [2021-11-25 19:48:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:44,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:48:45,062 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:45,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340259103] [2021-11-25 19:48:45,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340259103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:45,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307403040] [2021-11-25 19:48:45,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:45,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:45,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:45,064 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:45,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:48:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:45,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-25 19:48:45,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:45,322 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:48:45,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 15 [2021-11-25 19:48:45,335 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:48:45,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 9 treesize of output 15 [2021-11-25 19:48:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:48:51,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 19:48:55,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307403040] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:55,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1001934867] [2021-11-25 19:48:55,685 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-25 19:48:55,685 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:55,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:55,685 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:55,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:55,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:55,754 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-25 19:48:55,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-25 19:48:55,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:55,826 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-25 19:48:55,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-25 19:48:56,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-25 19:48:56,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:56,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-25 19:48:56,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-25 19:48:56,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:48:56,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2021-11-25 19:48:56,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-25 19:48:56,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-25 19:48:57,305 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 136 for LOIs [2021-11-25 19:48:58,030 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 180 for LOIs [2021-11-25 19:48:58,122 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2021-11-25 19:48:58,148 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2021-11-25 19:48:58,247 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:03,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1001934867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:03,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:49:03,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14, 8] total 41 [2021-11-25 19:49:03,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258225057] [2021-11-25 19:49:03,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:03,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 19:49:03,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:03,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 19:49:03,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 19:49:03,914 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-25 19:49:06,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:06,094 INFO L93 Difference]: Finished difference Result 140 states and 193 transitions. [2021-11-25 19:49:06,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 19:49:06,094 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2021-11-25 19:49:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:06,096 INFO L225 Difference]: With dead ends: 140 [2021-11-25 19:49:06,096 INFO L226 Difference]: Without dead ends: 95 [2021-11-25 19:49:06,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 91 SyntacticMatches, 9 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2021-11-25 19:49:06,098 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 35 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:06,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 404 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 410 Invalid, 0 Unknown, 87 Unchecked, 0.8s Time] [2021-11-25 19:49:06,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-25 19:49:06,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2021-11-25 19:49:06,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 59 states have internal predecessors, (68), 24 states have call successors, (24), 9 states have call predecessors, (24), 11 states have return successors, (33), 22 states have call predecessors, (33), 23 states have call successors, (33) [2021-11-25 19:49:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 125 transitions. [2021-11-25 19:49:06,120 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 125 transitions. Word has length 45 [2021-11-25 19:49:06,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:06,120 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 125 transitions. [2021-11-25 19:49:06,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-25 19:49:06,120 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 125 transitions. [2021-11-25 19:49:06,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 19:49:06,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:06,122 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:49:06,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:06,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:49:06,323 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:06,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:06,324 INFO L85 PathProgramCache]: Analyzing trace with hash 105816945, now seen corresponding path program 1 times [2021-11-25 19:49:06,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:06,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791326782] [2021-11-25 19:49:06,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:06,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 19:49:06,476 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:06,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791326782] [2021-11-25 19:49:06,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791326782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:06,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019230462] [2021-11-25 19:49:06,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:06,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:06,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:06,483 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:06,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:49:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:06,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-25 19:49:06,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:06,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-11-25 19:49:06,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:06,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 19:49:06,883 INFO L354 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2021-11-25 19:49:06,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 84 [2021-11-25 19:49:06,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:06,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 80 treesize of output 68 [2021-11-25 19:49:06,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:06,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 15 [2021-11-25 19:49:06,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2021-11-25 19:49:06,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:06,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-25 19:49:06,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:49:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:49:12,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:49:16,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019230462] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:49:16,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [138812057] [2021-11-25 19:49:16,334 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-25 19:49:16,334 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:16,334 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:16,335 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:16,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:16,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,414 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-25 19:49:16,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-25 19:49:16,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,486 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-25 19:49:16,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-25 19:49:16,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:16,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-25 19:49:16,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-25 19:49:16,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-25 19:49:16,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,935 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-25 19:49:16,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-25 19:49:16,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-25 19:49:16,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:16,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:16,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 91 treesize of output 99 [2021-11-25 19:49:17,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2021-11-25 19:49:17,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 91 treesize of output 99 [2021-11-25 19:49:17,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 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 [2021-11-25 19:49:17,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:17,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:17,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:17,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:17,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:17,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:17,736 INFO L354 Elim1Store]: treesize reduction 255, result has 23.2 percent of original size [2021-11-25 19:49:17,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 694 treesize of output 703 [2021-11-25 19:49:18,026 INFO L354 Elim1Store]: treesize reduction 182, result has 18.0 percent of original size [2021-11-25 19:49:18,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 673 treesize of output 685 [2021-11-25 19:49:18,464 INFO L354 Elim1Store]: treesize reduction 246, result has 16.3 percent of original size [2021-11-25 19:49:18,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 676 treesize of output 695 [2021-11-25 19:49:18,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:18,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:18,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:18,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:18,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:18,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:18,844 INFO L354 Elim1Store]: treesize reduction 279, result has 24.2 percent of original size [2021-11-25 19:49:18,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 716 treesize of output 719 [2021-11-25 19:49:18,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:18,906 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-11-25 19:49:18,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 710 treesize of output 663 [2021-11-25 19:49:18,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 684 treesize of output 663 [2021-11-25 19:49:19,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:19,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:19,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:19,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 59 treesize of output 13 [2021-11-25 19:49:19,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:19,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:19,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:19,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:49:19,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:19,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:19,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:19,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:19,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:20,570 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 56 for LOIs [2021-11-25 19:49:21,082 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 164 for LOIs [2021-11-25 19:49:21,140 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2021-11-25 19:49:21,163 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2021-11-25 19:49:21,269 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:25,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [138812057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:25,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:49:25,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 17, 8] total 46 [2021-11-25 19:49:25,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941822528] [2021-11-25 19:49:25,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:25,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 19:49:25,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:25,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 19:49:25,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1900, Unknown=0, NotChecked=0, Total=2070 [2021-11-25 19:49:25,363 INFO L87 Difference]: Start difference. First operand 91 states and 125 transitions. Second operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-25 19:49:26,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:26,218 INFO L93 Difference]: Finished difference Result 158 states and 208 transitions. [2021-11-25 19:49:26,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 19:49:26,219 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2021-11-25 19:49:26,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:26,220 INFO L225 Difference]: With dead ends: 158 [2021-11-25 19:49:26,220 INFO L226 Difference]: Without dead ends: 107 [2021-11-25 19:49:26,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=186, Invalid=2070, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 19:49:26,222 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 17 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:26,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 190 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 258 Invalid, 0 Unknown, 95 Unchecked, 0.4s Time] [2021-11-25 19:49:26,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-25 19:49:26,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-25 19:49:26,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 70 states have internal predecessors, (82), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (35), 24 states have call predecessors, (35), 25 states have call successors, (35) [2021-11-25 19:49:26,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 143 transitions. [2021-11-25 19:49:26,248 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 143 transitions. Word has length 46 [2021-11-25 19:49:26,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:26,249 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 143 transitions. [2021-11-25 19:49:26,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-25 19:49:26,249 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 143 transitions. [2021-11-25 19:49:26,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 19:49:26,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:26,251 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:49:26,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-25 19:49:26,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:26,461 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:26,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:26,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2023309535, now seen corresponding path program 1 times [2021-11-25 19:49:26,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:26,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150003954] [2021-11-25 19:49:26,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:26,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:49:26,657 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:26,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150003954] [2021-11-25 19:49:26,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150003954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:26,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519449635] [2021-11-25 19:49:26,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:26,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:26,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:26,664 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:26,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:49:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:26,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-25 19:49:26,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:49:28,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:49:28,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519449635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:49:28,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1160898954] [2021-11-25 19:49:28,405 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-25 19:49:28,405 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:28,406 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:28,406 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:28,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:28,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,486 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-25 19:49:28,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-25 19:49:28,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,566 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-25 19:49:28,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-25 19:49:28,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:28,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-25 19:49:28,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-25 19:49:28,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-25 19:49:28,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-25 19:49:28,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:29,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2021-11-25 19:49:29,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:29,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-25 19:49:29,975 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 134 for LOIs [2021-11-25 19:49:31,078 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 183 for LOIs [2021-11-25 19:49:31,147 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2021-11-25 19:49:31,167 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-25 19:49:31,242 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:36,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1160898954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:36,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:49:36,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 36 [2021-11-25 19:49:36,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766450092] [2021-11-25 19:49:36,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:36,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 19:49:36,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:36,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 19:49:36,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 19:49:36,061 INFO L87 Difference]: Start difference. First operand 107 states and 143 transitions. Second operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-25 19:49:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:37,474 INFO L93 Difference]: Finished difference Result 185 states and 242 transitions. [2021-11-25 19:49:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 19:49:37,474 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 47 [2021-11-25 19:49:37,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:37,476 INFO L225 Difference]: With dead ends: 185 [2021-11-25 19:49:37,476 INFO L226 Difference]: Without dead ends: 116 [2021-11-25 19:49:37,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 19:49:37,478 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 85 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:37,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 173 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 470 Invalid, 0 Unknown, 153 Unchecked, 0.9s Time] [2021-11-25 19:49:37,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-25 19:49:37,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2021-11-25 19:49:37,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 76 states have internal predecessors, (89), 27 states have call successors, (27), 12 states have call predecessors, (27), 14 states have return successors, (37), 25 states have call predecessors, (37), 26 states have call successors, (37) [2021-11-25 19:49:37,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 153 transitions. [2021-11-25 19:49:37,510 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 153 transitions. Word has length 47 [2021-11-25 19:49:37,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:37,511 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 153 transitions. [2021-11-25 19:49:37,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-25 19:49:37,511 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 153 transitions. [2021-11-25 19:49:37,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 19:49:37,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:37,513 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:49:37,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:37,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:37,728 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:37,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:37,728 INFO L85 PathProgramCache]: Analyzing trace with hash 848277815, now seen corresponding path program 1 times [2021-11-25 19:49:37,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:37,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836884768] [2021-11-25 19:49:37,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:37,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 19:49:37,923 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:37,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836884768] [2021-11-25 19:49:37,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836884768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:37,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838430240] [2021-11-25 19:49:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:37,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:37,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:37,925 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:37,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26011994-509c-4d86-989d-38269fefc85d/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:49:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:38,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-25 19:49:38,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 19:49:40,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 19:49:40,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838430240] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:49:40,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [371283740] [2021-11-25 19:49:40,749 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-25 19:49:40,749 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:40,749 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:40,749 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:40,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:40,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:40,831 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-25 19:49:40,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-25 19:49:40,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:40,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-25 19:49:41,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-25 19:49:41,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:49:41,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-25 19:49:41,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-25 19:49:41,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,231 INFO L354 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2021-11-25 19:49:41,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 74 [2021-11-25 19:49:41,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:41,275 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 19:49:41,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2021-11-25 19:49:41,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 7 [2021-11-25 19:49:41,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-25 19:49:41,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,436 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-25 19:49:41,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-25 19:49:41,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:41,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 91 treesize of output 99 [2021-11-25 19:49:41,489 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 19:49:41,490 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 19:49:41,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:41,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:41,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:41,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:41,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:41,778 INFO L354 Elim1Store]: treesize reduction 48, result has 48.9 percent of original size [2021-11-25 19:49:41,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 case distinctions, treesize of input 337 treesize of output 365 [2021-11-25 19:49:42,094 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-25 19:49:42,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 304 treesize of output 385 [2021-11-25 19:49:42,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:42,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:42,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:42,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:42,262 INFO L354 Elim1Store]: treesize reduction 48, result has 48.9 percent of original size [2021-11-25 19:49:42,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 327 treesize of output 349 [2021-11-25 19:49:42,568 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-25 19:49:42,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 287 treesize of output 377 [2021-11-25 19:49:42,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:49:42,633 INFO L354 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2021-11-25 19:49:42,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 309 treesize of output 280 [2021-11-25 19:49:42,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 296 treesize of output 283 [2021-11-25 19:49:42,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:55:10,311 WARN L227 SmtUtils]: Spent 9.81s on a formula simplification. DAG size of input: 3631 DAG size of output: 3631 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)