./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 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/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_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 12:28:56,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:28:56,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:28:56,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:28:56,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:28:56,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:28:56,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:28:56,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:28:56,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:28:56,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:28:56,557 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:28:56,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:28:56,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:28:56,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:28:56,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:28:56,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:28:56,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:28:56,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:28:56,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:28:56,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:28:56,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:28:56,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:28:56,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:28:56,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:28:56,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:28:56,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:28:56,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:28:56,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:28:56,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:28:56,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:28:56,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:28:56,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:28:56,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:28:56,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:28:56,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:28:56,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:28:56,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:28:56,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:28:56,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:28:56,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:28:56,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:28:56,582 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 12:28:56,608 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:28:56,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:28:56,609 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:28:56,609 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:28:56,610 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:28:56,610 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:28:56,610 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:28:56,610 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:28:56,611 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:28:56,611 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:28:56,611 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:28:56,611 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:28:56,611 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:28:56,612 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:28:56,612 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:28:56,612 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:28:56,612 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:28:56,612 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:28:56,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:28:56,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:28:56,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:28:56,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:28:56,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:28:56,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:28:56,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:28:56,615 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:28:56,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:28:56,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:28:56,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:28:56,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:28:56,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:28:56,616 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:28:56,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:28:56,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:28:56,616 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:28:56,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:28:56,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:28:56,617 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:28:56,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 [2022-12-14 12:28:56,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:28:56,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:28:56,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:28:56,812 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:28:56,813 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:28:56,813 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2022-12-14 12:28:59,437 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:28:59,732 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:28:59,732 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2022-12-14 12:28:59,750 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/data/5468c902b/d7333ea813f046e285260370494d4c83/FLAG265a9fe7c [2022-12-14 12:28:59,761 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/data/5468c902b/d7333ea813f046e285260370494d4c83 [2022-12-14 12:28:59,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:28:59,764 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:28:59,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:28:59,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:28:59,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:28:59,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:28:59" (1/1) ... [2022-12-14 12:28:59,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@102dc182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:28:59, skipping insertion in model container [2022-12-14 12:28:59,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:28:59" (1/1) ... [2022-12-14 12:28:59,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:28:59,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:28:59,991 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2022-12-14 12:28:59,997 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2022-12-14 12:29:00,550 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 12:29:00,555 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:00,555 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:00,555 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:00,556 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:00,557 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:00,567 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:00,567 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:00,569 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:00,569 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:00,571 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:00,571 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:00,572 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:00,572 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:00,636 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 12:29:00,637 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 12:29:00,637 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 12:29:00,641 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 12:29:00,642 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 12:29:00,642 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 12:29:00,858 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 12:29:00,859 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 12:29:00,868 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 12:29:00,870 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 12:29:00,871 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 12:29:00,872 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 12:29:00,873 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 12:29:00,873 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 12:29:00,874 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 12:29:00,874 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 12:29:00,875 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 12:29:00,972 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 12:29:00,986 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:29:00,997 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:29:01,006 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2022-12-14 12:29:01,006 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2022-12-14 12:29:01,030 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 12:29:01,032 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:01,032 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:01,032 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:01,033 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:01,033 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:01,038 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:01,039 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:01,039 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:01,040 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:01,040 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:01,041 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:01,041 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:01,041 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:29:01,046 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 12:29:01,046 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 12:29:01,047 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 12:29:01,049 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 12:29:01,050 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 12:29:01,050 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 12:29:01,065 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 12:29:01,066 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 12:29:01,066 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 12:29:01,067 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 12:29:01,067 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 12:29:01,068 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 12:29:01,068 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 12:29:01,069 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 12:29:01,069 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 12:29:01,069 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 12:29:01,070 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 12:29:01,085 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 12:29:01,095 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:29:01,229 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:29:01,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:01 WrapperNode [2022-12-14 12:29:01,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:29:01,230 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:29:01,230 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:29:01,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:29:01,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:01" (1/1) ... [2022-12-14 12:29:01,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:01" (1/1) ... [2022-12-14 12:29:01,308 INFO L138 Inliner]: procedures = 679, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 141 [2022-12-14 12:29:01,308 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:29:01,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:29:01,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:29:01,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:29:01,316 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:01" (1/1) ... [2022-12-14 12:29:01,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:01" (1/1) ... [2022-12-14 12:29:01,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:01" (1/1) ... [2022-12-14 12:29:01,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:01" (1/1) ... [2022-12-14 12:29:01,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:01" (1/1) ... [2022-12-14 12:29:01,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:01" (1/1) ... [2022-12-14 12:29:01,345 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:01" (1/1) ... [2022-12-14 12:29:01,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:01" (1/1) ... [2022-12-14 12:29:01,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:29:01,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:29:01,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:29:01,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:29:01,356 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:01" (1/1) ... [2022-12-14 12:29:01,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:29:01,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:29:01,379 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:29:01,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:29:01,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:29:01,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 12:29:01,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 12:29:01,430 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-12-14 12:29:01,430 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-12-14 12:29:01,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 12:29:01,430 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-12-14 12:29:01,430 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-12-14 12:29:01,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:29:01,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 12:29:01,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:29:01,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:29:01,431 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 12:29:01,431 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 12:29:01,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 12:29:01,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 12:29:01,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 12:29:01,431 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-12-14 12:29:01,431 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-12-14 12:29:01,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:29:01,598 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:29:01,600 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:29:01,788 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:29:01,852 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:29:01,852 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 12:29:01,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:29:01 BoogieIcfgContainer [2022-12-14 12:29:01,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:29:01,857 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:29:01,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:29:01,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:29:01,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:28:59" (1/3) ... [2022-12-14 12:29:01,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b608975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:29:01, skipping insertion in model container [2022-12-14 12:29:01,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:29:01" (2/3) ... [2022-12-14 12:29:01,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b608975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:29:01, skipping insertion in model container [2022-12-14 12:29:01,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:29:01" (3/3) ... [2022-12-14 12:29:01,861 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rbegin_harness.i [2022-12-14 12:29:01,874 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:29:01,874 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:29:01,907 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:29:01,911 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@104cd741, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:29:01,911 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:29:01,914 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) [2022-12-14 12:29:01,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 12:29:01,920 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:29:01,921 INFO L195 NwaCegarLoop]: 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] [2022-12-14 12:29:01,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:29:01,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:29:01,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1901947457, now seen corresponding path program 1 times [2022-12-14 12:29:01,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:29:01,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229821107] [2022-12-14 12:29:01,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:01,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:29:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:29:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:29:02,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:29:02,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229821107] [2022-12-14 12:29:02,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229821107] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:29:02,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696754214] [2022-12-14 12:29:02,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:02,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:29:02,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:29:02,433 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:29:02,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:29:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:29:02,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-14 12:29:02,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:29:02,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 12:29:02,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 12:29:02,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:02,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:02,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:02,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-12-14 12:29:02,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:02,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:02,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:02,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-12-14 12:29:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:29:03,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:29:03,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696754214] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:29:03,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:29:03,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2022-12-14 12:29:03,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132650819] [2022-12-14 12:29:03,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:29:03,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:29:03,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:29:03,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:29:03,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:29:03,893 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) [2022-12-14 12:29:04,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:29:04,377 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2022-12-14 12:29:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:29:04,380 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 [2022-12-14 12:29:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:29:04,388 INFO L225 Difference]: With dead ends: 124 [2022-12-14 12:29:04,388 INFO L226 Difference]: Without dead ends: 83 [2022-12-14 12:29:04,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:29:04,394 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 61 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:29:04,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 162 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 12:29:04,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-12-14 12:29:04,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2022-12-14 12:29:04,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 49 states have internal predecessors, (60), 24 states have call successors, (24), 9 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-12-14 12:29:04,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 108 transitions. [2022-12-14 12:29:04,445 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 108 transitions. Word has length 37 [2022-12-14 12:29:04,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:29:04,446 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 108 transitions. [2022-12-14 12:29:04,446 INFO L496 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) [2022-12-14 12:29:04,447 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 108 transitions. [2022-12-14 12:29:04,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 12:29:04,449 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:29:04,449 INFO L195 NwaCegarLoop]: 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] [2022-12-14 12:29:04,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:29:04,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 12:29:04,651 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:29:04,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:29:04,653 INFO L85 PathProgramCache]: Analyzing trace with hash -25443914, now seen corresponding path program 1 times [2022-12-14 12:29:04,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:29:04,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462021569] [2022-12-14 12:29:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:04,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:29:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:29:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 12:29:04,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:29:04,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462021569] [2022-12-14 12:29:04,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462021569] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:29:04,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313925727] [2022-12-14 12:29:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:04,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:29:04,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:29:04,929 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:29:04,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:29:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:29:05,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 98 conjunts are in the unsatisfiable core [2022-12-14 12:29:05,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:29:05,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 12:29:05,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 12:29:05,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:05,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:05,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-12-14 12:29:05,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:05,240 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:29:05,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:05,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:05,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-12-14 12:29:05,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:05,262 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:29:05,348 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-12-14 12:29:05,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 141 [2022-12-14 12:29:05,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:05,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:05,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:05,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 125 [2022-12-14 12:29:05,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:05,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:05,373 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:29:05,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:05,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:05,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:05,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 44 [2022-12-14 12:29:05,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-12-14 12:29:05,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:05,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 21 [2022-12-14 12:29:05,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:29:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:29:07,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:29:10,572 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ 16 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) (.cse7 (+ 8 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0))) (.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (and (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse0 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse3) 0)))) (or (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_212 Int)) (let ((.cse5 (+ |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 24))) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse4 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse5) 0))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store .cse6 v_ArrVal_212 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse6 v_ArrVal_212 v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse5) 0)))))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store .cse6 v_ArrVal_212 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse6 v_ArrVal_212 v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse3) 0)) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store .cse6 v_ArrVal_212 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse6 v_ArrVal_212 v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse7) 0)) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse8 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse8 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse7) 0)) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse9 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse9 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |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_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store .cse6 v_ArrVal_212 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse6 v_ArrVal_212 v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |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))) (= v_ArrVal_212 0))))) is different from false [2022-12-14 12:29:10,614 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:10,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-12-14 12:29:10,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:10,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 377 treesize of output 317 [2022-12-14 12:29:10,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 330 treesize of output 314 [2022-12-14 12:29:10,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 306 [2022-12-14 12:29:10,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-14 12:29:10,749 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:10,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 75 [2022-12-14 12:29:10,811 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:29:10,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-12-14 12:29:10,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:10,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 69 [2022-12-14 12:29:10,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:10,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:10,830 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 12:29:10,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 60 [2022-12-14 12:29:10,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:10,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:10,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:10,851 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-12-14 12:29:10,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-12-14 12:29:10,861 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 12:29:10,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:10,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:10,870 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-12-14 12:29:10,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-12-14 12:29:10,876 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 12:29:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-12-14 12:29:10,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313925727] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:29:10,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1867511093] [2022-12-14 12:29:10,963 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 12:29:10,963 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:29:10,966 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:29:10,970 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:29:10,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:29:11,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,044 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:29:11,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 12:29:11,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 12:29:11,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 12:29:11,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,276 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:29:11,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,301 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:29:11,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 12:29:11,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,421 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 12:29:11,421 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:29:11,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 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 [2022-12-14 12:29:11,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 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 [2022-12-14 12:29:11,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:29:11,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 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 [2022-12-14 12:29:11,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:11,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 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 [2022-12-14 12:29:11,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:11,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:11,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:11,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:11,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:11,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:12,107 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-12-14 12:29:12,108 INFO L350 Elim1Store]: Elim1 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 666 treesize of output 675 [2022-12-14 12:29:12,495 INFO L321 Elim1Store]: treesize reduction 192, result has 23.5 percent of original size [2022-12-14 12:29:12,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 650 treesize of output 684 [2022-12-14 12:29:12,655 INFO L321 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2022-12-14 12:29:12,656 INFO L350 Elim1Store]: Elim1 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 643 treesize of output 654 [2022-12-14 12:29:12,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:12,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:12,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:12,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:12,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:12,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:12,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:12,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:12,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:12,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:12,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:12,861 INFO L321 Elim1Store]: treesize reduction 233, result has 25.6 percent of original size [2022-12-14 12:29:12,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 688 treesize of output 691 [2022-12-14 12:29:12,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:12,915 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-12-14 12:29:12,916 INFO L350 Elim1Store]: Elim1 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 682 treesize of output 635 [2022-12-14 12:29:12,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 656 treesize of output 635 [2022-12-14 12:29:22,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:22,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 12:29:22,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:29:22,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:29:22,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:22,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 12:29:22,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:22,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 12:29:22,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:22,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:22,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 12:29:22,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:22,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 12:29:22,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:22,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:22,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 12:29:22,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:22,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:29:22,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:22,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 12:29:22,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:22,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:29:22,799 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2022-12-14 12:29:22,956 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 136 for LOIs [2022-12-14 12:29:22,996 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 12:29:23,013 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:29:25,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1867511093] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:29:25,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:29:25,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 10, 9] total 32 [2022-12-14 12:29:25,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878470022] [2022-12-14 12:29:25,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:29:25,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 12:29:25,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:29:25,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 12:29:25,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=833, Unknown=1, NotChecked=58, Total=992 [2022-12-14 12:29:25,362 INFO L87 Difference]: Start difference. First operand 81 states and 108 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) [2022-12-14 12:29:26,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:29:26,949 INFO L93 Difference]: Finished difference Result 145 states and 191 transitions. [2022-12-14 12:29:26,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 12:29:26,950 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 [2022-12-14 12:29:26,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:29:26,951 INFO L225 Difference]: With dead ends: 145 [2022-12-14 12:29:26,951 INFO L226 Difference]: Without dead ends: 107 [2022-12-14 12:29:26,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=121, Invalid=1004, Unknown=1, NotChecked=64, Total=1190 [2022-12-14 12:29:26,952 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 12:29:26,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 180 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 12:29:26,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-14 12:29:26,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2022-12-14 12:29:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.353846153846154) internal successors, (88), 68 states have internal predecessors, (88), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-12-14 12:29:26,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 139 transitions. [2022-12-14 12:29:26,974 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 139 transitions. Word has length 38 [2022-12-14 12:29:26,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:29:26,974 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 139 transitions. [2022-12-14 12:29:26,974 INFO L496 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) [2022-12-14 12:29:26,974 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 139 transitions. [2022-12-14 12:29:26,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 12:29:26,975 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:29:26,975 INFO L195 NwaCegarLoop]: 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] [2022-12-14 12:29:26,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:29:27,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:29:27,177 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:29:27,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:29:27,177 INFO L85 PathProgramCache]: Analyzing trace with hash 936457051, now seen corresponding path program 1 times [2022-12-14 12:29:27,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:29:27,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332684433] [2022-12-14 12:29:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:27,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:29:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:29:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:29:27,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:29:27,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332684433] [2022-12-14 12:29:27,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332684433] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:29:27,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890127563] [2022-12-14 12:29:27,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:27,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:29:27,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:29:27,298 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:29:27,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:29:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:29:27,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 12:29:27,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:29:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:29:27,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:29:27,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890127563] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:29:27,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:29:27,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 12:29:27,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226938162] [2022-12-14 12:29:27,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:29:27,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:29:27,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:29:27,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:29:27,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 12:29:27,476 INFO L87 Difference]: Start difference. First operand 105 states and 139 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) [2022-12-14 12:29:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:29:27,612 INFO L93 Difference]: Finished difference Result 213 states and 283 transitions. [2022-12-14 12:29:27,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:29:27,613 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 [2022-12-14 12:29:27,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:29:27,615 INFO L225 Difference]: With dead ends: 213 [2022-12-14 12:29:27,615 INFO L226 Difference]: Without dead ends: 115 [2022-12-14 12:29:27,616 INFO L412 NwaCegarLoop]: 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 [2022-12-14 12:29:27,617 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 33 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:29:27,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 152 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:29:27,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-14 12:29:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2022-12-14 12:29:27,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.323076923076923) internal successors, (86), 68 states have internal predecessors, (86), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-12-14 12:29:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 137 transitions. [2022-12-14 12:29:27,638 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 137 transitions. Word has length 39 [2022-12-14 12:29:27,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:29:27,639 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 137 transitions. [2022-12-14 12:29:27,639 INFO L496 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) [2022-12-14 12:29:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 137 transitions. [2022-12-14 12:29:27,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 12:29:27,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:29:27,640 INFO L195 NwaCegarLoop]: 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] [2022-12-14 12:29:27,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:29:27,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:29:27,840 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:29:27,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:29:27,841 INFO L85 PathProgramCache]: Analyzing trace with hash 229502625, now seen corresponding path program 1 times [2022-12-14 12:29:27,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:29:27,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917962685] [2022-12-14 12:29:27,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:27,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:29:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:29:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:29:27,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:29:27,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917962685] [2022-12-14 12:29:27,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917962685] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:29:27,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292636793] [2022-12-14 12:29:27,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:27,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:29:27,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:29:27,963 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:29:27,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:29:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:29:28,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 12:29:28,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:29:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:29:28,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:29:28,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292636793] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:29:28,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:29:28,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-12-14 12:29:28,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088736266] [2022-12-14 12:29:28,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:29:28,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:29:28,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:29:28,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:29:28,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:29:28,147 INFO L87 Difference]: Start difference. First operand 105 states and 137 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) [2022-12-14 12:29:28,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:29:28,304 INFO L93 Difference]: Finished difference Result 255 states and 343 transitions. [2022-12-14 12:29:28,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:29:28,305 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 [2022-12-14 12:29:28,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:29:28,306 INFO L225 Difference]: With dead ends: 255 [2022-12-14 12:29:28,306 INFO L226 Difference]: Without dead ends: 155 [2022-12-14 12:29:28,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-12-14 12:29:28,307 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 63 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:29:28,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 177 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:29:28,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-12-14 12:29:28,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 107. [2022-12-14 12:29:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.3134328358208955) internal successors, (88), 70 states have internal predecessors, (88), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-12-14 12:29:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2022-12-14 12:29:28,330 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 41 [2022-12-14 12:29:28,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:29:28,330 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2022-12-14 12:29:28,330 INFO L496 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) [2022-12-14 12:29:28,330 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2022-12-14 12:29:28,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 12:29:28,331 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:29:28,331 INFO L195 NwaCegarLoop]: 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] [2022-12-14 12:29:28,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:29:28,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:29:28,533 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:29:28,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:29:28,534 INFO L85 PathProgramCache]: Analyzing trace with hash -523042093, now seen corresponding path program 1 times [2022-12-14 12:29:28,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:29:28,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012833879] [2022-12-14 12:29:28,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:28,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:29:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:29:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:29:28,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:29:28,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012833879] [2022-12-14 12:29:28,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012833879] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:29:28,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933887088] [2022-12-14 12:29:28,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:28,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:29:28,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:29:28,722 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:29:28,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:29:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:29:28,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:29:28,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:29:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:29:28,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:29:28,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933887088] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:29:28,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:29:28,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-12-14 12:29:28,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557407636] [2022-12-14 12:29:28,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:29:28,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:29:28,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:29:28,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:29:28,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:29:28,866 INFO L87 Difference]: Start difference. First operand 107 states and 139 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) [2022-12-14 12:29:28,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:29:28,930 INFO L93 Difference]: Finished difference Result 229 states and 315 transitions. [2022-12-14 12:29:28,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:29:28,930 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 [2022-12-14 12:29:28,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:29:28,931 INFO L225 Difference]: With dead ends: 229 [2022-12-14 12:29:28,932 INFO L226 Difference]: Without dead ends: 135 [2022-12-14 12:29:28,932 INFO L412 NwaCegarLoop]: 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 [2022-12-14 12:29:28,933 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:29:28,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 94 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:29:28,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-14 12:29:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 113. [2022-12-14 12:29:28,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 76 states have internal predecessors, (96), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-12-14 12:29:28,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 147 transitions. [2022-12-14 12:29:28,959 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 147 transitions. Word has length 42 [2022-12-14 12:29:28,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:29:28,959 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 147 transitions. [2022-12-14 12:29:28,959 INFO L496 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) [2022-12-14 12:29:28,959 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 147 transitions. [2022-12-14 12:29:28,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 12:29:28,960 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:29:28,960 INFO L195 NwaCegarLoop]: 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] [2022-12-14 12:29:28,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:29:29,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:29:29,162 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:29:29,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:29:29,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1075265638, now seen corresponding path program 1 times [2022-12-14 12:29:29,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:29:29,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193633640] [2022-12-14 12:29:29,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:29,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:29:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:29:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:29:29,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:29:29,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193633640] [2022-12-14 12:29:29,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193633640] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:29:29,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314823033] [2022-12-14 12:29:29,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:29,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:29:29,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:29:29,462 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:29:29,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:29:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:29:29,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-14 12:29:29,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:29:29,668 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-12-14 12:29:29,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-12-14 12:29:29,684 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 12:29:29,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 12:29:29,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 12:29:29,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 12:29:29,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:29,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2022-12-14 12:29:29,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:29:39,534 WARN L233 SmtUtils]: Spent 8.70s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:29:41,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:41,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:41,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:41,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:41,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:41,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:41,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:41,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:41,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:41,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:41,195 INFO L321 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2022-12-14 12:29:41,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 6 disjoint index pairs (out of 105 index pairs), introduced 11 new quantified variables, introduced 77 case distinctions, treesize of input 209 treesize of output 143 [2022-12-14 12:29:41,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:41,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:41,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:41,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:41,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:41,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:41,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:29:41,209 INFO L321 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2022-12-14 12:29:41,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 140 treesize of output 86 [2022-12-14 12:29:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:29:41,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:29:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:29:43,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314823033] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:29:43,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1271789625] [2022-12-14 12:29:43,882 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-12-14 12:29:43,882 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:29:43,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:29:43,883 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:29:43,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:29:43,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:43,939 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:29:43,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 12:29:43,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:43,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 12:29:44,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,119 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:29:44,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 12:29:44,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 12:29:44,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,181 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:29:44,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:29:44,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,234 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:29:44,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 12:29:44,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:44,287 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:29:44,778 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 132 for LOIs [2022-12-14 12:29:45,192 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 170 for LOIs [2022-12-14 12:29:45,245 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 12:29:45,257 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 23 for LOIs [2022-12-14 12:29:45,305 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:29:50,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1271789625] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:29:50,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:29:50,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14, 8] total 42 [2022-12-14 12:29:50,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949883920] [2022-12-14 12:29:50,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:29:50,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 12:29:50,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:29:50,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 12:29:50,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 12:29:50,649 INFO L87 Difference]: Start difference. First operand 113 states and 147 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) [2022-12-14 12:29:53,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:29:53,668 INFO L93 Difference]: Finished difference Result 175 states and 224 transitions. [2022-12-14 12:29:53,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 12:29:53,669 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 [2022-12-14 12:29:53,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:29:53,670 INFO L225 Difference]: With dead ends: 175 [2022-12-14 12:29:53,670 INFO L226 Difference]: Without dead ends: 123 [2022-12-14 12:29:53,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=256, Invalid=1906, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 12:29:53,671 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 44 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:29:53,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 453 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 12:29:53,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-12-14 12:29:53,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2022-12-14 12:29:53,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 77 states have (on average 1.3116883116883118) internal successors, (101), 81 states have internal predecessors, (101), 27 states have call successors, (27), 13 states have call predecessors, (27), 15 states have return successors, (27), 25 states have call predecessors, (27), 25 states have call successors, (27) [2022-12-14 12:29:53,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 155 transitions. [2022-12-14 12:29:53,706 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 155 transitions. Word has length 45 [2022-12-14 12:29:53,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:29:53,706 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 155 transitions. [2022-12-14 12:29:53,706 INFO L496 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) [2022-12-14 12:29:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 155 transitions. [2022-12-14 12:29:53,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 12:29:53,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:29:53,707 INFO L195 NwaCegarLoop]: 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] [2022-12-14 12:29:53,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:29:53,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 12:29:53,909 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:29:53,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:29:53,910 INFO L85 PathProgramCache]: Analyzing trace with hash -747764591, now seen corresponding path program 1 times [2022-12-14 12:29:53,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:29:53,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266134237] [2022-12-14 12:29:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:53,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:29:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:29:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 12:29:54,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:29:54,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266134237] [2022-12-14 12:29:54,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266134237] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:29:54,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418976895] [2022-12-14 12:29:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:29:54,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:29:54,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:29:54,146 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:29:54,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:29:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:29:54,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2022-12-14 12:29:54,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:29:54,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 12:29:54,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:54,389 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:29:54,438 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-12-14 12:29:54,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 115 [2022-12-14 12:29:54,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:54,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 91 [2022-12-14 12:29:54,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:54,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-14 12:29:54,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-12-14 12:29:54,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:29:54,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 21 [2022-12-14 12:29:54,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:29:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:29:56,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:29:59,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 284 [2022-12-14 12:29:59,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 256 [2022-12-14 12:29:59,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 242 [2022-12-14 12:30:01,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:30:01,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 148 [2022-12-14 12:30:01,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:30:01,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1393 treesize of output 1181 [2022-12-14 12:30:01,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:30:01,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1301 treesize of output 1261 [2022-12-14 12:30:01,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:30:01,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1261 treesize of output 1241 [2022-12-14 12:30:01,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:30:01,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1293 treesize of output 1277 [2022-12-14 12:30:01,436 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:30:01,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1277 treesize of output 1269 [2022-12-14 12:30:01,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 196 [2022-12-14 12:30:01,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 85 [2022-12-14 12:30:01,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 109 [2022-12-14 12:30:01,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2022-12-14 12:30:01,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 12:30:01,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-12-14 12:30:01,897 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:30:01,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 314 treesize of output 280 [2022-12-14 12:30:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:30:02,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418976895] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:30:02,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [115215356] [2022-12-14 12:30:02,670 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-12-14 12:30:02,671 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:30:02,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:30:02,671 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:30:02,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:30:02,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:02,715 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:30:02,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 12:30:02,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:02,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 12:30:02,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:02,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:02,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:02,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:02,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:02,890 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:30:02,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:02,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:02,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:02,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:02,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:02,909 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:30:02,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:02,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 12:30:02,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 12:30:02,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:02,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:02,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:02,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:02,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 12:30:02,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:02,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,027 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-12-14 12:30:03,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 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 [2022-12-14 12:30:03,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:03,064 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 12:30:03,064 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:30:03,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,127 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 12:30:03,127 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:30:03,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:30:03,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:03,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 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 [2022-12-14 12:30:03,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:30:03,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:30:03,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 12:30:03,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:03,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 12:30:03,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 12:30:03,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 12:30:03,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 12:30:03,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:30:03,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 12:30:03,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:03,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:30:04,028 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-12-14 12:30:04,331 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 156 for LOIs [2022-12-14 12:30:04,370 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 12:30:04,384 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-12-14 12:30:04,437 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:30:08,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [115215356] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:30:08,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:30:08,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 17, 12] total 50 [2022-12-14 12:30:08,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668629941] [2022-12-14 12:30:08,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:30:08,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 12:30:08,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:30:08,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 12:30:08,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2256, Unknown=7, NotChecked=0, Total=2450 [2022-12-14 12:30:08,500 INFO L87 Difference]: Start difference. First operand 120 states and 155 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) [2022-12-14 12:30:11,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:30:11,074 INFO L93 Difference]: Finished difference Result 181 states and 232 transitions. [2022-12-14 12:30:11,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 12:30:11,075 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 [2022-12-14 12:30:11,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:30:11,076 INFO L225 Difference]: With dead ends: 181 [2022-12-14 12:30:11,076 INFO L226 Difference]: Without dead ends: 127 [2022-12-14 12:30:11,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=242, Invalid=2831, Unknown=7, NotChecked=0, Total=3080 [2022-12-14 12:30:11,077 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:30:11,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 165 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 12:30:11,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-14 12:30:11,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-12-14 12:30:11,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.3125) internal successors, (105), 84 states have internal predecessors, (105), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-12-14 12:30:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 161 transitions. [2022-12-14 12:30:11,117 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 161 transitions. Word has length 46 [2022-12-14 12:30:11,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:30:11,117 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 161 transitions. [2022-12-14 12:30:11,118 INFO L496 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) [2022-12-14 12:30:11,118 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 161 transitions. [2022-12-14 12:30:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 12:30:11,118 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:30:11,118 INFO L195 NwaCegarLoop]: 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] [2022-12-14 12:30:11,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:30:11,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:11,320 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:30:11,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:30:11,321 INFO L85 PathProgramCache]: Analyzing trace with hash -300718304, now seen corresponding path program 1 times [2022-12-14 12:30:11,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:30:11,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946049839] [2022-12-14 12:30:11,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:11,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:30:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:30:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:30:11,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:30:11,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946049839] [2022-12-14 12:30:11,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946049839] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:30:11,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612155641] [2022-12-14 12:30:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:11,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:11,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:11,819 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:30:11,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:30:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:30:11,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 12:30:11,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:30:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:30:13,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:30:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:30:13,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612155641] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:30:13,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [615336299] [2022-12-14 12:30:13,847 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 12:30:13,848 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:30:13,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:30:13,848 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:30:13,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:30:13,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:13,887 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 12:30:13,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-12-14 12:30:13,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:13,930 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:30:13,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 12:30:14,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 12:30:14,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,090 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:30:14,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 12:30:14,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,122 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:30:14,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:30:14,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 12:30:14,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,183 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:30:14,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:14,205 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:30:14,698 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 126 for LOIs [2022-12-14 12:30:15,408 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 170 for LOIs [2022-12-14 12:30:15,471 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 12:30:15,485 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 12:30:15,533 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:30:21,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [615336299] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:30:21,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:30:21,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-12-14 12:30:21,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977113412] [2022-12-14 12:30:21,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:30:21,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 12:30:21,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:30:21,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 12:30:21,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 12:30:21,614 INFO L87 Difference]: Start difference. First operand 125 states and 161 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) [2022-12-14 12:30:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:30:25,091 INFO L93 Difference]: Finished difference Result 194 states and 246 transitions. [2022-12-14 12:30:25,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 12:30:25,092 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 [2022-12-14 12:30:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:30:25,093 INFO L225 Difference]: With dead ends: 194 [2022-12-14 12:30:25,093 INFO L226 Difference]: Without dead ends: 135 [2022-12-14 12:30:25,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=273, Invalid=1619, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 12:30:25,094 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 115 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:30:25,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 249 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 12:30:25,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-14 12:30:25,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 126. [2022-12-14 12:30:25,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.308641975308642) internal successors, (106), 85 states have internal predecessors, (106), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-12-14 12:30:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 162 transitions. [2022-12-14 12:30:25,130 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 162 transitions. Word has length 47 [2022-12-14 12:30:25,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:30:25,130 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 162 transitions. [2022-12-14 12:30:25,130 INFO L496 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) [2022-12-14 12:30:25,130 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 162 transitions. [2022-12-14 12:30:25,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 12:30:25,130 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:30:25,131 INFO L195 NwaCegarLoop]: 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] [2022-12-14 12:30:25,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 12:30:25,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:25,332 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:30:25,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:30:25,333 INFO L85 PathProgramCache]: Analyzing trace with hash 895175255, now seen corresponding path program 1 times [2022-12-14 12:30:25,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:30:25,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513686347] [2022-12-14 12:30:25,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:25,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:30:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:30:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 12:30:25,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:30:25,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513686347] [2022-12-14 12:30:25,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513686347] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:30:25,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455035406] [2022-12-14 12:30:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:25,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:25,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:25,817 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:30:25,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:30:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:30:25,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 12:30:25,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:30:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:30:27,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:30:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 12:30:27,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455035406] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:30:27,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [818537410] [2022-12-14 12:30:27,797 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 12:30:27,797 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:30:27,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:30:27,798 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:30:27,798 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:30:27,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:27,836 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 12:30:27,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-12-14 12:30:27,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:27,873 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:30:27,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 12:30:28,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 12:30:28,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,053 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:30:28,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,071 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:30:28,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 12:30:28,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 12:30:28,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:28,163 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 12:30:28,163 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:30:28,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:30:28,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,229 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-12-14 12:30:28,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 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 [2022-12-14 12:30:28,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:28,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:28,269 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 12:30:28,270 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:30:28,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,331 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 12:30:28,331 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:30:28,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:30:28,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:28,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 12:30:28,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-12-14 12:30:28,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-12-14 12:30:28,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-12-14 12:30:28,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:30:28,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 12:30:28,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:30:28,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:30:28,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:28,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 12:30:29,074 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-12-14 12:30:29,644 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 156 for LOIs [2022-12-14 12:30:29,676 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 12:30:29,687 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 12:30:29,726 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:30:33,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [818537410] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:30:33,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:30:33,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-12-14 12:30:33,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389035310] [2022-12-14 12:30:33,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:30:33,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 12:30:33,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:30:33,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 12:30:33,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 12:30:33,905 INFO L87 Difference]: Start difference. First operand 126 states and 162 transitions. Second operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 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) [2022-12-14 12:30:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:30:38,574 INFO L93 Difference]: Finished difference Result 200 states and 254 transitions. [2022-12-14 12:30:38,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 12:30:38,575 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 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 48 [2022-12-14 12:30:38,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:30:38,576 INFO L225 Difference]: With dead ends: 200 [2022-12-14 12:30:38,576 INFO L226 Difference]: Without dead ends: 141 [2022-12-14 12:30:38,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 12:30:38,577 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:30:38,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 175 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 12:30:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-12-14 12:30:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 127. [2022-12-14 12:30:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 86 states have internal predecessors, (107), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-12-14 12:30:38,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 163 transitions. [2022-12-14 12:30:38,615 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 163 transitions. Word has length 48 [2022-12-14 12:30:38,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:30:38,615 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 163 transitions. [2022-12-14 12:30:38,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 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) [2022-12-14 12:30:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 163 transitions. [2022-12-14 12:30:38,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 12:30:38,616 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:30:38,616 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:30:38,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 12:30:38,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:38,818 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:30:38,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:30:38,819 INFO L85 PathProgramCache]: Analyzing trace with hash 219978292, now seen corresponding path program 1 times [2022-12-14 12:30:38,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:30:38,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970530294] [2022-12-14 12:30:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:38,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:30:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:30:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 12:30:38,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:30:38,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970530294] [2022-12-14 12:30:38,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970530294] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:30:38,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593389138] [2022-12-14 12:30:38,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:30:38,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:30:38,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:30:38,953 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:30:38,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 12:30:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:30:39,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-14 12:30:39,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:30:39,196 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-12-14 12:30:39,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-12-14 12:30:39,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-14 12:30:39,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 12:30:39,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:39,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2022-12-14 12:30:39,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:30:39,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-12-14 12:30:53,686 WARN L233 SmtUtils]: Spent 11.28s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:30:55,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:55,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:55,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:55,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:55,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:55,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:55,602 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 12:30:55,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 8 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 118 treesize of output 72 [2022-12-14 12:30:55,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:55,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:55,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:55,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:55,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:55,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:30:55,613 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 12:30:55,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 8 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 88 treesize of output 42 [2022-12-14 12:30:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:30:55,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:30:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 12:30:58,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593389138] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:30:58,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [434371008] [2022-12-14 12:30:58,601 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 12:30:58,601 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:30:58,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:30:58,602 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:30:58,602 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:30:58,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,641 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:30:58,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 12:30:58,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 12:30:58,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 12:30:58,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 12:30:58,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,823 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:30:58,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,837 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:30:58,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:30:58,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,896 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:30:58,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 12:30:58,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:30:58,930 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:30:59,989 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 129 for LOIs [2022-12-14 12:31:00,048 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 158 for LOIs [2022-12-14 12:31:01,184 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-12-14 12:31:01,186 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 12:31:01,201 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 12:31:01,245 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:31:10,002 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6449#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19| Int)) (and (= (select |#length| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 32) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 8) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 8) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 24)) 0) 16) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 24) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 24) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 1) (not (= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 16) 0) (<= 0 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) (not (= 3 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|)) (not (= 4 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 24)) 0) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) (not (= 0 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 24)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 16) 0))) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= 33 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:31:10,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:31:10,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:31:10,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 17, 11] total 29 [2022-12-14 12:31:10,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381454067] [2022-12-14 12:31:10,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:31:10,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 12:31:10,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:10,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 12:31:10,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=2718, Unknown=1, NotChecked=0, Total=3080 [2022-12-14 12:31:10,005 INFO L87 Difference]: Start difference. First operand 127 states and 163 transitions. Second operand has 29 states, 24 states have (on average 2.75) internal successors, (66), 25 states have internal predecessors, (66), 11 states have call successors, (21), 5 states have call predecessors, (21), 10 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2022-12-14 12:31:12,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:31:14,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:31:16,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:31:17,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:31:19,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:31:21,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:31:33,416 WARN L233 SmtUtils]: Spent 9.41s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:31:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:36,900 INFO L93 Difference]: Finished difference Result 451 states and 615 transitions. [2022-12-14 12:31:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 12:31:36,900 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.75) internal successors, (66), 25 states have internal predecessors, (66), 11 states have call successors, (21), 5 states have call predecessors, (21), 10 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) Word has length 48 [2022-12-14 12:31:36,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:36,902 INFO L225 Difference]: With dead ends: 451 [2022-12-14 12:31:36,902 INFO L226 Difference]: Without dead ends: 342 [2022-12-14 12:31:36,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2410 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=766, Invalid=6205, Unknown=1, NotChecked=0, Total=6972 [2022-12-14 12:31:36,904 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 292 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 1728 mSolverCounterSat, 342 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 1728 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:36,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 653 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 1728 Invalid, 5 Unknown, 0 Unchecked, 14.4s Time] [2022-12-14 12:31:36,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-12-14 12:31:37,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 240. [2022-12-14 12:31:37,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 158 states have (on average 1.2848101265822784) internal successors, (203), 166 states have internal predecessors, (203), 54 states have call successors, (54), 22 states have call predecessors, (54), 27 states have return successors, (61), 51 states have call predecessors, (61), 51 states have call successors, (61) [2022-12-14 12:31:37,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 318 transitions. [2022-12-14 12:31:37,003 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 318 transitions. Word has length 48 [2022-12-14 12:31:37,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:37,003 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 318 transitions. [2022-12-14 12:31:37,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.75) internal successors, (66), 25 states have internal predecessors, (66), 11 states have call successors, (21), 5 states have call predecessors, (21), 10 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2022-12-14 12:31:37,004 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 318 transitions. [2022-12-14 12:31:37,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-14 12:31:37,004 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:37,004 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:31:37,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 12:31:37,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 12:31:37,205 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:37,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:37,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1437511773, now seen corresponding path program 1 times [2022-12-14 12:31:37,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:37,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168686971] [2022-12-14 12:31:37,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:37,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:31:37,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:37,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168686971] [2022-12-14 12:31:37,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168686971] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:31:37,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525167353] [2022-12-14 12:31:37,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:37,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:37,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:31:37,413 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:31:37,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 12:31:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:37,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:31:37,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:31:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:31:37,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:31:37,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525167353] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:37,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:31:37,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2022-12-14 12:31:37,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157792915] [2022-12-14 12:31:37,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:37,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:31:37,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:37,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:31:37,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-12-14 12:31:37,616 INFO L87 Difference]: Start difference. First operand 240 states and 318 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 12:31:37,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:37,834 INFO L93 Difference]: Finished difference Result 353 states and 472 transitions. [2022-12-14 12:31:37,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:31:37,835 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2022-12-14 12:31:37,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:37,836 INFO L225 Difference]: With dead ends: 353 [2022-12-14 12:31:37,837 INFO L226 Difference]: Without dead ends: 242 [2022-12-14 12:31:37,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-12-14 12:31:37,837 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 33 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:37,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 176 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:31:37,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-12-14 12:31:37,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 240. [2022-12-14 12:31:37,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 158 states have (on average 1.2721518987341771) internal successors, (201), 166 states have internal predecessors, (201), 54 states have call successors, (54), 22 states have call predecessors, (54), 27 states have return successors, (61), 51 states have call predecessors, (61), 51 states have call successors, (61) [2022-12-14 12:31:37,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 316 transitions. [2022-12-14 12:31:37,929 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 316 transitions. Word has length 53 [2022-12-14 12:31:37,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:37,929 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 316 transitions. [2022-12-14 12:31:37,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 12:31:37,929 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 316 transitions. [2022-12-14 12:31:37,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 12:31:37,930 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:37,931 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:31:37,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 12:31:38,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 12:31:38,132 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:38,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:38,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1165451566, now seen corresponding path program 1 times [2022-12-14 12:31:38,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:38,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347412638] [2022-12-14 12:31:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:38,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:31:38,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:38,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347412638] [2022-12-14 12:31:38,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347412638] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:31:38,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233876567] [2022-12-14 12:31:38,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:38,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:38,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:31:38,429 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:31:38,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 12:31:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:38,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 12:31:38,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:31:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:31:38,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:31:38,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233876567] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:38,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:31:38,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2022-12-14 12:31:38,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272785620] [2022-12-14 12:31:38,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:38,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:31:38,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:38,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:31:38,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-12-14 12:31:38,689 INFO L87 Difference]: Start difference. First operand 240 states and 316 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 12:31:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:39,006 INFO L93 Difference]: Finished difference Result 400 states and 529 transitions. [2022-12-14 12:31:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:31:39,007 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2022-12-14 12:31:39,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:39,008 INFO L225 Difference]: With dead ends: 400 [2022-12-14 12:31:39,008 INFO L226 Difference]: Without dead ends: 287 [2022-12-14 12:31:39,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-12-14 12:31:39,008 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 49 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:39,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 202 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:31:39,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-12-14 12:31:39,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 245. [2022-12-14 12:31:39,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 161 states have (on average 1.2546583850931676) internal successors, (202), 171 states have internal predecessors, (202), 55 states have call successors, (55), 22 states have call predecessors, (55), 28 states have return successors, (65), 51 states have call predecessors, (65), 52 states have call successors, (65) [2022-12-14 12:31:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 322 transitions. [2022-12-14 12:31:39,098 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 322 transitions. Word has length 56 [2022-12-14 12:31:39,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:39,099 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 322 transitions. [2022-12-14 12:31:39,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 12:31:39,099 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 322 transitions. [2022-12-14 12:31:39,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 12:31:39,099 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:39,100 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:31:39,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 12:31:39,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:39,301 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:39,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:39,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1817261077, now seen corresponding path program 1 times [2022-12-14 12:31:39,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:39,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759401969] [2022-12-14 12:31:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:39,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:31:39,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:39,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759401969] [2022-12-14 12:31:39,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759401969] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:31:39,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478100229] [2022-12-14 12:31:39,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:39,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:39,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:31:39,500 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:31:39,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 12:31:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:39,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-14 12:31:39,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:31:39,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 12:31:39,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:39,798 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:31:39,844 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-12-14 12:31:39,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 104 [2022-12-14 12:31:39,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:39,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 82 [2022-12-14 12:31:39,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-12-14 12:31:39,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:39,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 21 [2022-12-14 12:31:39,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:31:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 12:31:53,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:31:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 12:31:57,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478100229] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:31:57,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1695439043] [2022-12-14 12:31:57,363 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-12-14 12:31:57,363 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:31:57,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:31:57,363 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:31:57,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:31:57,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,402 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 12:31:57,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-12-14 12:31:57,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,444 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:31:57,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 12:31:57,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 12:31:57,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,625 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:31:57,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,643 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:31:57,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 12:31:57,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,729 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 12:31:57,729 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:31:57,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:31:57,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 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 [2022-12-14 12:31:57,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 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 [2022-12-14 12:31:57,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 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 [2022-12-14 12:31:57,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:57,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 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 [2022-12-14 12:31:57,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:57,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:57,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:57,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:57,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:57,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:57,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:58,222 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-12-14 12:31:58,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 662 treesize of output 671 [2022-12-14 12:31:58,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:58,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:58,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:58,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:58,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:58,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:58,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:58,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:58,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:58,535 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-12-14 12:31:58,535 INFO L350 Elim1Store]: Elim1 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 676 treesize of output 685 [2022-12-14 12:31:58,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:58,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 12:31:58,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:58,607 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-12-14 12:31:58,607 INFO L350 Elim1Store]: Elim1 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 682 treesize of output 635 [2022-12-14 12:31:58,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:58,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:58,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 656 treesize of output 635 [2022-12-14 12:31:58,793 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-12-14 12:31:58,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 648 treesize of output 678 [2022-12-14 12:31:58,876 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-12-14 12:31:58,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 641 treesize of output 652 [2022-12-14 12:32:04,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:32:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:04,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 12:32:04,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:04,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 12:32:04,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:04,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 12:32:05,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:05,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:05,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 12:32:05,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:32:05,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:05,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:32:05,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:05,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:32:05,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:05,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:05,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 12:32:05,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:05,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 12:32:05,367 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2022-12-14 12:32:05,900 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 156 for LOIs [2022-12-14 12:32:05,942 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 12:32:05,956 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 12:32:06,006 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:32:10,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1695439043] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:32:10,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:32:10,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 18, 11] total 50 [2022-12-14 12:32:10,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342179521] [2022-12-14 12:32:10,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:32:10,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 12:32:10,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:32:10,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 12:32:10,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 12:32:10,563 INFO L87 Difference]: Start difference. First operand 245 states and 322 transitions. Second operand has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 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) [2022-12-14 12:32:14,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:32:14,004 INFO L93 Difference]: Finished difference Result 420 states and 541 transitions. [2022-12-14 12:32:14,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 12:32:14,005 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 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 60 [2022-12-14 12:32:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:32:14,006 INFO L225 Difference]: With dead ends: 420 [2022-12-14 12:32:14,006 INFO L226 Difference]: Without dead ends: 257 [2022-12-14 12:32:14,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 125 SyntacticMatches, 11 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=312, Invalid=2994, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 12:32:14,007 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 68 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:32:14,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 144 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 12:32:14,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-12-14 12:32:14,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 245. [2022-12-14 12:32:14,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 161 states have (on average 1.2546583850931676) internal successors, (202), 171 states have internal predecessors, (202), 55 states have call successors, (55), 22 states have call predecessors, (55), 28 states have return successors, (65), 51 states have call predecessors, (65), 52 states have call successors, (65) [2022-12-14 12:32:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 322 transitions. [2022-12-14 12:32:14,102 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 322 transitions. Word has length 60 [2022-12-14 12:32:14,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:32:14,102 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 322 transitions. [2022-12-14 12:32:14,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 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) [2022-12-14 12:32:14,102 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 322 transitions. [2022-12-14 12:32:14,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 12:32:14,103 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:32:14,103 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:32:14,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 12:32:14,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 12:32:14,305 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:32:14,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:32:14,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1037523843, now seen corresponding path program 1 times [2022-12-14 12:32:14,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:32:14,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640121680] [2022-12-14 12:32:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:14,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:32:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 12:32:14,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:32:14,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640121680] [2022-12-14 12:32:14,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640121680] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:32:14,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191885053] [2022-12-14 12:32:14,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:14,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:32:14,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:32:14,473 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:32:14,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 12:32:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:14,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 12:32:14,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:32:14,730 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 12:32:14,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:32:14,850 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 12:32:14,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191885053] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:32:14,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [352483084] [2022-12-14 12:32:14,852 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 12:32:14,852 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:32:14,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:32:14,853 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:32:14,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:32:14,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:14,896 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:32:14,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 12:32:14,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:14,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 12:32:15,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 12:32:15,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 12:32:15,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,099 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:32:15,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,119 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:32:15,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:15,177 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 12:32:15,177 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:32:15,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 12:32:15,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:15,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:15,238 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 12:32:15,238 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:32:15,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,304 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 12:32:15,304 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:32:15,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 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 [2022-12-14 12:32:15,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:32:15,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:15,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 12:32:15,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-12-14 12:32:15,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-12-14 12:32:15,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 12:32:15,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:32:15,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:32:15,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 12:32:15,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:32:15,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:32:15,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:15,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 12:32:17,266 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-12-14 12:32:17,284 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-12-14 12:32:17,821 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-12-14 12:32:17,822 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 12:32:17,838 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 12:32:17,879 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:32:23,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11503#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125| Int)) (and (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24)))) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24)) 0) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|))) (= |#NULL.base| 0))' at error location [2022-12-14 12:32:23,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:32:23,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:32:23,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 6] total 16 [2022-12-14 12:32:23,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817200912] [2022-12-14 12:32:23,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:32:23,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 12:32:23,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:32:23,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 12:32:23,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 12:32:23,162 INFO L87 Difference]: Start difference. First operand 245 states and 322 transitions. Second operand has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 12:32:23,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:32:23,528 INFO L93 Difference]: Finished difference Result 504 states and 652 transitions. [2022-12-14 12:32:23,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 12:32:23,529 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 63 [2022-12-14 12:32:23,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:32:23,531 INFO L225 Difference]: With dead ends: 504 [2022-12-14 12:32:23,531 INFO L226 Difference]: Without dead ends: 293 [2022-12-14 12:32:23,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=173, Invalid=1897, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 12:32:23,534 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 9 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:32:23,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 578 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:32:23,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-12-14 12:32:23,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 253. [2022-12-14 12:32:23,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 167 states have (on average 1.2395209580838322) internal successors, (207), 180 states have internal predecessors, (207), 54 states have call successors, (54), 22 states have call predecessors, (54), 31 states have return successors, (68), 50 states have call predecessors, (68), 51 states have call successors, (68) [2022-12-14 12:32:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 329 transitions. [2022-12-14 12:32:23,636 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 329 transitions. Word has length 63 [2022-12-14 12:32:23,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:32:23,636 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 329 transitions. [2022-12-14 12:32:23,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-12-14 12:32:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 329 transitions. [2022-12-14 12:32:23,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 12:32:23,637 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:32:23,637 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:32:23,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 12:32:23,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 12:32:23,839 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:32:23,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:32:23,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2119530051, now seen corresponding path program 1 times [2022-12-14 12:32:23,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:32:23,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279106307] [2022-12-14 12:32:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:23,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:32:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 12:32:24,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:32:24,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279106307] [2022-12-14 12:32:24,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279106307] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:32:24,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435380563] [2022-12-14 12:32:24,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:32:24,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:32:24,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:32:24,028 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:32:24,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 12:32:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:32:24,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-14 12:32:24,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:32:26,323 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_52| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_55| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_52|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_55|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_52| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_55| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_52|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_55|) 0)))) is different from true [2022-12-14 12:32:26,946 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 12:32:26,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 30 [2022-12-14 12:32:26,951 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-12-14 12:32:26,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 1 [2022-12-14 12:32:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2022-12-14 12:32:26,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:32:27,362 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-14 12:32:27,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-12-14 12:32:27,369 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-14 12:32:27,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2022-12-14 12:32:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 12:32:27,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435380563] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:32:27,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [68210007] [2022-12-14 12:32:27,384 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 12:32:27,384 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:32:27,384 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:32:27,385 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:32:27,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:32:27,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,422 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 12:32:27,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-12-14 12:32:27,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,462 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:32:27,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 12:32:27,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,618 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:32:27,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 12:32:27,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,650 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:32:27,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 12:32:27,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 12:32:27,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,749 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 12:32:27,750 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:32:27,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:32:27,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 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 [2022-12-14 12:32:27,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 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 [2022-12-14 12:32:27,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:27,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 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 [2022-12-14 12:32:27,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:27,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:27,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:27,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:27,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:27,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:27,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:28,198 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-12-14 12:32:28,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-12-14 12:32:28,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:28,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:28,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:28,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:28,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:28,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:28,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:28,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:28,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:28,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:28,522 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-12-14 12:32:28,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 680 treesize of output 689 [2022-12-14 12:32:28,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:28,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 12:32:28,694 INFO L321 Elim1Store]: treesize reduction 152, result has 18.7 percent of original size [2022-12-14 12:32:28,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 647 treesize of output 658 [2022-12-14 12:32:28,873 INFO L321 Elim1Store]: treesize reduction 208, result has 17.1 percent of original size [2022-12-14 12:32:28,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 650 treesize of output 668 [2022-12-14 12:32:28,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:28,920 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-12-14 12:32:28,921 INFO L350 Elim1Store]: Elim1 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 682 treesize of output 635 [2022-12-14 12:32:28,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:28,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:28,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 656 treesize of output 635 [2022-12-14 12:32:48,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:48,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 12:32:48,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:48,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 12:32:48,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:48,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 12:32:48,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:32:48,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:48,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 12:32:48,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:32:48,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:32:48,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:48,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:32:48,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:48,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 12:32:48,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:48,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:48,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 12:32:48,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:32:48,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:32:49,390 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2022-12-14 12:32:49,417 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2022-12-14 12:32:50,070 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-12-14 12:32:50,071 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 12:32:50,085 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 12:32:50,134 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:32:55,530 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13050#(and (<= |~#s_can_fail_allocator_static~0.base| 4) (<= 0 |__VERIFIER_assert_#in~cond|) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= (mod __VERIFIER_assert_~cond 256) 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147| Int)) (and (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24)) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147|) (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24)))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 0) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|))) (<= 4 |~#s_can_fail_allocator_static~0.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-12-14 12:32:55,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:32:55,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:32:55,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 17, 14] total 30 [2022-12-14 12:32:55,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714452508] [2022-12-14 12:32:55,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:32:55,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 12:32:55,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:32:55,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 12:32:55,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2833, Unknown=1, NotChecked=108, Total=3192 [2022-12-14 12:32:55,531 INFO L87 Difference]: Start difference. First operand 253 states and 329 transitions. Second operand has 30 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2022-12-14 12:32:57,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:32:59,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:33:01,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:33:04,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:33:04,342 INFO L93 Difference]: Finished difference Result 692 states and 888 transitions. [2022-12-14 12:33:04,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 12:33:04,343 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) Word has length 65 [2022-12-14 12:33:04,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:33:04,344 INFO L225 Difference]: With dead ends: 692 [2022-12-14 12:33:04,344 INFO L226 Difference]: Without dead ends: 439 [2022-12-14 12:33:04,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 146 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=892, Invalid=7853, Unknown=1, NotChecked=184, Total=8930 [2022-12-14 12:33:04,346 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 229 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 80 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:33:04,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 490 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1244 Invalid, 3 Unknown, 98 Unchecked, 7.0s Time] [2022-12-14 12:33:04,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-12-14 12:33:04,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 239. [2022-12-14 12:33:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 164 states have (on average 1.225609756097561) internal successors, (201), 172 states have internal predecessors, (201), 47 states have call successors, (47), 21 states have call predecessors, (47), 27 states have return successors, (57), 45 states have call predecessors, (57), 45 states have call successors, (57) [2022-12-14 12:33:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 305 transitions. [2022-12-14 12:33:04,452 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 305 transitions. Word has length 65 [2022-12-14 12:33:04,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:33:04,452 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 305 transitions. [2022-12-14 12:33:04,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2022-12-14 12:33:04,452 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 305 transitions. [2022-12-14 12:33:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 12:33:04,453 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:33:04,453 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:33:04,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 12:33:04,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 12:33:04,655 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:33:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:33:04,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1214424754, now seen corresponding path program 1 times [2022-12-14 12:33:04,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:33:04,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085638574] [2022-12-14 12:33:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:33:04,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:33:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:33:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 12:33:06,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:33:06,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085638574] [2022-12-14 12:33:06,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085638574] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:33:06,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419887689] [2022-12-14 12:33:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:33:06,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:33:06,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:33:06,170 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:33:06,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 12:33:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:33:06,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 127 conjunts are in the unsatisfiable core [2022-12-14 12:33:06,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:33:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:33:08,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:33:13,547 INFO L321 Elim1Store]: treesize reduction 95, result has 1.0 percent of original size [2022-12-14 12:33:13,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 1 [2022-12-14 12:33:14,670 INFO L321 Elim1Store]: treesize reduction 17, result has 80.5 percent of original size [2022-12-14 12:33:14,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 131 [2022-12-14 12:33:15,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419887689] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:33:15,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1624353227] [2022-12-14 12:33:15,794 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 12:33:15,794 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:33:15,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:33:15,794 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:33:15,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:33:15,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:15,839 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:33:15,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 12:33:15,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:15,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 12:33:16,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 12:33:16,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,019 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:33:16,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,053 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:33:16,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 12:33:16,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:33:16,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,124 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:33:16,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 12:33:16,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:33:16,164 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:33:23,348 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 145 for LOIs [2022-12-14 12:33:23,538 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 123 for LOIs [2022-12-14 12:33:24,186 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-12-14 12:33:24,214 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 12:33:24,226 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 12:33:24,269 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:33:41,101 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14835#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169| Int)) (and (= 32 (select |#length| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|)) (= (select |#valid| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|) 1) (< |#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|) (not (= 3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|) (not (= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|) 24)) 0) 16) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|) 24) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|) 8) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|) 16) 0) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|) 24)) (not (= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|)) (not (= 4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|) 16) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|) 24)) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_169|))) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= 33 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:33:41,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:33:41,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 12:33:41,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 29] total 41 [2022-12-14 12:33:41,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309314479] [2022-12-14 12:33:41,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 12:33:41,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 12:33:41,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:33:41,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 12:33:41,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=5698, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 12:33:41,103 INFO L87 Difference]: Start difference. First operand 239 states and 305 transitions. Second operand has 41 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 34 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-12-14 12:33:47,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:33:47,993 INFO L93 Difference]: Finished difference Result 492 states and 609 transitions. [2022-12-14 12:33:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 12:33:47,993 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 34 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) Word has length 67 [2022-12-14 12:33:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:33:47,995 INFO L225 Difference]: With dead ends: 492 [2022-12-14 12:33:47,995 INFO L226 Difference]: Without dead ends: 403 [2022-12-14 12:33:47,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4427 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=1343, Invalid=13663, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 12:33:47,997 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 397 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 2741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:33:47,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 684 Invalid, 2741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 2304 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 12:33:47,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-12-14 12:33:48,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 281. [2022-12-14 12:33:48,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 194 states have (on average 1.2010309278350515) internal successors, (233), 200 states have internal predecessors, (233), 52 states have call successors, (52), 30 states have call predecessors, (52), 34 states have return successors, (55), 50 states have call predecessors, (55), 48 states have call successors, (55) [2022-12-14 12:33:48,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 340 transitions. [2022-12-14 12:33:48,112 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 340 transitions. Word has length 67 [2022-12-14 12:33:48,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:33:48,112 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 340 transitions. [2022-12-14 12:33:48,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 34 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-12-14 12:33:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 340 transitions. [2022-12-14 12:33:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 12:33:48,113 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:33:48,113 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:33:48,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 12:33:48,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 12:33:48,315 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:33:48,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:33:48,316 INFO L85 PathProgramCache]: Analyzing trace with hash -318758414, now seen corresponding path program 1 times [2022-12-14 12:33:48,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:33:48,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849017127] [2022-12-14 12:33:48,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:33:48,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:33:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:33:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-14 12:33:48,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:33:48,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849017127] [2022-12-14 12:33:48,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849017127] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:33:48,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:33:48,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 12:33:48,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461780506] [2022-12-14 12:33:48,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:33:48,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 12:33:48,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:33:48,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 12:33:48,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 12:33:48,520 INFO L87 Difference]: Start difference. First operand 281 states and 340 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-14 12:33:48,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:33:48,794 INFO L93 Difference]: Finished difference Result 321 states and 382 transitions. [2022-12-14 12:33:48,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 12:33:48,795 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 70 [2022-12-14 12:33:48,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:33:48,796 INFO L225 Difference]: With dead ends: 321 [2022-12-14 12:33:48,796 INFO L226 Difference]: Without dead ends: 319 [2022-12-14 12:33:48,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-14 12:33:48,797 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:33:48,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 288 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:33:48,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-12-14 12:33:48,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 304. [2022-12-14 12:33:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 209 states have (on average 1.186602870813397) internal successors, (248), 217 states have internal predecessors, (248), 55 states have call successors, (55), 33 states have call predecessors, (55), 39 states have return successors, (60), 53 states have call predecessors, (60), 51 states have call successors, (60) [2022-12-14 12:33:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 363 transitions. [2022-12-14 12:33:48,921 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 363 transitions. Word has length 70 [2022-12-14 12:33:48,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:33:48,922 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 363 transitions. [2022-12-14 12:33:48,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-14 12:33:48,922 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 363 transitions. [2022-12-14 12:33:48,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 12:33:48,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:33:48,922 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:33:48,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 12:33:48,923 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:33:48,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:33:48,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1543905359, now seen corresponding path program 2 times [2022-12-14 12:33:48,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:33:48,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618996383] [2022-12-14 12:33:48,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:33:48,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:33:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:33:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:33:49,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:33:49,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618996383] [2022-12-14 12:33:49,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618996383] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:33:49,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492278963] [2022-12-14 12:33:49,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:33:49,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:33:49,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:33:49,775 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:33:49,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 12:33:49,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:33:49,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:33:49,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 12:33:49,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:34:14,549 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:34:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 57 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 12:34:14,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:34:15,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:34:15,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2022-12-14 12:34:15,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:34:15,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-12-14 12:34:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 12:34:15,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492278963] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:34:15,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [269956452] [2022-12-14 12:34:15,196 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 12:34:15,196 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:34:15,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:34:15,196 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:34:15,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:34:15,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,239 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:34:15,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 12:34:15,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-12-14 12:34:15,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,409 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:34:15,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 12:34:15,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 12:34:15,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,461 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:34:15,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:34:15,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,513 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:34:15,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 12:34:15,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:34:15,561 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:34:22,056 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 145 for LOIs [2022-12-14 12:34:22,250 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-12-14 12:34:22,744 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-12-14 12:34:22,779 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 12:34:22,793 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 12:34:22,843 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:34:35,971 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17463#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108| Int)) (and (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108|) 0) 2)) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108|) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108|) 0) 0)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108|) 0)) 8) 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108|) 0)) 24)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108|) 0) 3)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108|) 0) 16) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108|) 0)) 16) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108|) 0)) 24) 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108|) 0)) 1) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108|) 0)) 16) 0) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108|) 0)) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108|) 0)) 32) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108|) 0) 4)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108|) 0)) 8) 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_108|) 0)))) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= 33 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:34:35,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:34:35,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:34:35,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 13] total 35 [2022-12-14 12:34:35,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594102001] [2022-12-14 12:34:35,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:34:35,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 12:34:35,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:34:35,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 12:34:35,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=3516, Unknown=7, NotChecked=0, Total=3906 [2022-12-14 12:34:35,974 INFO L87 Difference]: Start difference. First operand 304 states and 363 transitions. Second operand has 35 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2022-12-14 12:34:56,292 WARN L233 SmtUtils]: Spent 20.06s on a formula simplification. DAG size of input: 45 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:35:06,377 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:35:16,464 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:35:26,542 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:35:46,664 WARN L233 SmtUtils]: Spent 20.07s on a formula simplification. DAG size of input: 50 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:35:56,858 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:35:59,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:36:03,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:36:05,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:36:07,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:36:27,498 WARN L233 SmtUtils]: Spent 20.06s on a formula simplification. DAG size of input: 54 DAG size of output: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:36:29,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:36:33,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:36:39,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:36:47,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:36:57,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:09,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:11,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:13,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:15,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:17,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:19,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:31,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:33,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:36,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:38,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:40,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:42,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:44,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:46,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:48,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:50,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:52,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:56,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:37:58,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:00,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:02,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:04,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:06,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:08,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:10,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:12,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:14,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:16,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:18,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:20,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:22,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:24,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:26,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:28,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:30,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:32,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:34,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:36,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:38,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:40,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:42,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:44,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:46,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:48,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:50,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:52,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:54,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:56,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:38:58,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:00,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:02,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:04,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:06,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:08,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:10,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:14,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:16,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:20,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:22,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:25,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:27,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:29,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:31,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:33,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:35,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:39,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:41,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:43,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:45,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:47,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:39:49,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:40:13,504 WARN L233 SmtUtils]: Spent 20.06s on a formula simplification. DAG size of input: 44 DAG size of output: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:40:15,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:40:19,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:40:21,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:40:22,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:40:22,006 INFO L93 Difference]: Finished difference Result 583 states and 681 transitions. [2022-12-14 12:40:22,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 12:40:22,007 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) Word has length 73 [2022-12-14 12:40:22,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:40:22,008 INFO L225 Difference]: With dead ends: 583 [2022-12-14 12:40:22,008 INFO L226 Difference]: Without dead ends: 375 [2022-12-14 12:40:22,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 182 SyntacticMatches, 7 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2758 ImplicationChecksByTransitivity, 215.6s TimeCoverageRelationStatistics Valid=918, Invalid=7789, Unknown=35, NotChecked=0, Total=8742 [2022-12-14 12:40:22,010 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 317 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 235 mSolverCounterUnsat, 83 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 168.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 83 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 168.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:40:22,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 982 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1969 Invalid, 83 Unknown, 0 Unchecked, 168.2s Time] [2022-12-14 12:40:22,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-12-14 12:40:22,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 321. [2022-12-14 12:40:22,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 219 states have (on average 1.1232876712328768) internal successors, (246), 226 states have internal predecessors, (246), 56 states have call successors, (56), 40 states have call predecessors, (56), 45 states have return successors, (58), 54 states have call predecessors, (58), 51 states have call successors, (58) [2022-12-14 12:40:22,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 360 transitions. [2022-12-14 12:40:22,143 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 360 transitions. Word has length 73 [2022-12-14 12:40:22,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:40:22,144 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 360 transitions. [2022-12-14 12:40:22,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2022-12-14 12:40:22,144 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 360 transitions. [2022-12-14 12:40:22,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 12:40:22,144 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:40:22,144 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:40:22,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 12:40:22,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 12:40:22,346 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:40:22,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:40:22,347 INFO L85 PathProgramCache]: Analyzing trace with hash 622289420, now seen corresponding path program 1 times [2022-12-14 12:40:22,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:40:22,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915295720] [2022-12-14 12:40:22,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:40:22,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:40:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:40:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 43 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 12:40:24,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:40:24,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915295720] [2022-12-14 12:40:24,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915295720] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:40:24,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667779011] [2022-12-14 12:40:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:40:24,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:40:24,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:40:24,621 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:40:24,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 12:40:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:40:24,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-14 12:40:24,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:40:24,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-12-14 12:40:24,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:24,926 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:40:24,976 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-12-14 12:40:24,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 104 [2022-12-14 12:40:24,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:24,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 82 [2022-12-14 12:40:24,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-12-14 12:40:25,088 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_76 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251| Int) (v_DerPreprocessor_77 (Array Int Int))) (let ((.cse0 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251|))) (let ((.cse1 (select .cse0 24))) (and (= (select .cse0 0) .cse1) (<= (+ .cse1 2) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251|) (= (select |c_#memory_$Pointer$.base| .cse1) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_76) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251| v_DerPreprocessor_77) .cse1 v_DerPreprocessor_76) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251| v_DerPreprocessor_77) .cse1)) (<= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251|) (not (= .cse1 0)) (= .cse1 (select v_DerPreprocessor_77 24)))))) is different from true [2022-12-14 12:40:33,401 WARN L233 SmtUtils]: Spent 5.01s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:40:49,633 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_80 (Array Int Int)) (v_DerPreprocessor_81 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_84| Int)) (let ((.cse2 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_84|))) (let ((.cse1 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_84|)) (.cse0 (select .cse2 24))) (and (not (= .cse0 0)) (= (select .cse1 8) 0) (= .cse0 (select v_DerPreprocessor_81 24)) (= (select .cse2 16) 0) (<= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_84|) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_80) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_84| v_DerPreprocessor_81) .cse0 v_DerPreprocessor_80) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_84| v_DerPreprocessor_81) .cse0)) (= (select .cse2 8) 0) (= (select .cse1 16) 0) (<= (+ 2 .cse0) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_84|) (= (select .cse2 0) .cse0))))) (exists ((v_DerPreprocessor_84 (Array Int Int)) (v_DerPreprocessor_85 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_86| Int)) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_86|))) (let ((.cse4 (select .cse3 24)) (.cse5 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_86|))) (and (= (select .cse3 8) 0) (not (= .cse4 0)) (= (select .cse3 16) 0) (<= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_86|) (<= (+ .cse4 2) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_86|) (= .cse4 (select .cse3 0)) (= (select |c_#memory_$Pointer$.base| .cse4) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_84) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_86| v_DerPreprocessor_85) .cse4 v_DerPreprocessor_84) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_86| v_DerPreprocessor_85) .cse4)) (= (select v_DerPreprocessor_85 24) .cse4) (= (select .cse5 16) 0) (= (select .cse5 8) 0))))) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_252| Int) (v_DerPreprocessor_78 (Array Int Int)) (v_DerPreprocessor_79 (Array Int Int))) (let ((.cse7 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_252|))) (let ((.cse8 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_252|)) (.cse6 (select .cse7 24))) (and (= .cse6 (select .cse7 0)) (= (select .cse8 8) 0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse6 v_DerPreprocessor_78) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_252| v_DerPreprocessor_79) .cse6 v_DerPreprocessor_78) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_252| v_DerPreprocessor_79) .cse6) (select |c_#memory_$Pointer$.base| .cse6)) (= (select .cse8 16) 0) (= .cse6 (select v_DerPreprocessor_79 24)) (= (select .cse7 8) 0) (<= (+ .cse6 2) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_252|) (= (select .cse7 16) 0) (<= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_252|) (not (= .cse6 0)))))) (exists ((v_DerPreprocessor_82 (Array Int Int)) (v_DerPreprocessor_83 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_85| Int)) (let ((.cse11 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_85|))) (let ((.cse9 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_85|)) (.cse10 (select .cse11 24))) (and (= (select .cse9 16) 0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse10 v_DerPreprocessor_82) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_85| v_DerPreprocessor_83) .cse10 v_DerPreprocessor_82) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_85| v_DerPreprocessor_83) .cse10) (select |c_#memory_$Pointer$.base| .cse10)) (= (select v_DerPreprocessor_83 24) .cse10) (<= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_85|) (<= (+ 2 .cse10) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_85|) (= (select .cse9 8) 0) (= (select .cse11 8) 0) (= (select .cse11 16) 0) (= (select .cse11 0) .cse10) (not (= .cse10 0)))))) (let ((.cse16 (+ 16 |c_aws_linked_list_is_valid_#in~list#1.offset|)) (.cse13 (+ |c_aws_linked_list_is_valid_#in~list#1.offset| 8)) (.cse12 (select |c_#memory_$Pointer$.base| |c_aws_linked_list_is_valid_#in~list#1.base|)) (.cse14 (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_is_valid_#in~list#1.base|))) (or (not (= (select .cse12 .cse13) 0)) (let ((.cse15 (+ |c_aws_linked_list_is_valid_#in~list#1.offset| 24))) (and (= (select .cse14 .cse15) 0) (= (select .cse12 .cse15) 0))) (not (= (select .cse12 .cse16) 0)) (not (= (select .cse14 .cse16) 0)) (not (= (select .cse14 .cse13) 0)) (and (= |c_aws_linked_list_is_valid_#in~list#1.offset| 0) (= |c_aws_linked_list_is_valid_#in~list#1.base| 0)) (and (= (select .cse12 |c_aws_linked_list_is_valid_#in~list#1.offset|) 0) (= (select .cse14 |c_aws_linked_list_is_valid_#in~list#1.offset|) 0)))) (exists ((v_DerPreprocessor_76 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251| Int) (v_DerPreprocessor_77 (Array Int Int))) (let ((.cse17 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251|))) (let ((.cse18 (select .cse17 24))) (and (= (select .cse17 0) .cse18) (<= (+ .cse18 2) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251|) (= (select |c_#memory_$Pointer$.base| .cse18) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse18 v_DerPreprocessor_76) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251| v_DerPreprocessor_77) .cse18 v_DerPreprocessor_76) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251| v_DerPreprocessor_77) .cse18)) (<= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251|) (not (= .cse18 0)) (= .cse18 (select v_DerPreprocessor_77 24))))))) is different from true [2022-12-14 12:40:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 14 trivial. 6 not checked. [2022-12-14 12:40:49,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:40:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 12:40:53,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667779011] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:40:53,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [556241931] [2022-12-14 12:40:53,035 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 12:40:53,036 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:40:53,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:40:53,036 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:40:53,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:40:53,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,080 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 12:40:53,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-12-14 12:40:53,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,116 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:40:53,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 12:40:53,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,274 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:40:53,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 12:40:53,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,304 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:40:53,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 12:40:53,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:40:53,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:40:53,368 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 12:40:53,368 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:40:53,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,426 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-12-14 12:40:53,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 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 [2022-12-14 12:40:53,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:40:53,468 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-14 12:40:53,468 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:40:53,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:40:53,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,557 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 12:40:53,557 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:40:53,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 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 [2022-12-14 12:40:53,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:40:53,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:40:53,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 12:40:53,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 12:40:53,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:40:53,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 12:40:53,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 12:40:53,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 12:40:53,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:40:53,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 12:40:53,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:40:53,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:40:55,369 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-12-14 12:40:55,383 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-12-14 12:40:55,896 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-12-14 12:40:55,897 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 12:40:55,908 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 12:40:55,951 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:41:03,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19340#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_215| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_215| Int)) (and (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_215|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_215| 24)) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_215|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_215|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_215| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_215|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_215| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_215|) (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_215| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_215|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_215| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_215|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_215| 24)))) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_215| 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_215|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_215|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_215| 24))))) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:41:03,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:41:03,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:41:03,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 8] total 43 [2022-12-14 12:41:03,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193136694] [2022-12-14 12:41:03,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:41:03,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 12:41:03,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:41:03,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 12:41:03,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=4087, Unknown=185, NotChecked=266, Total=4830 [2022-12-14 12:41:03,799 INFO L87 Difference]: Start difference. First operand 321 states and 360 transitions. Second operand has 43 states, 38 states have (on average 2.6052631578947367) internal successors, (99), 36 states have internal predecessors, (99), 20 states have call successors, (29), 9 states have call predecessors, (29), 12 states have return successors, (28), 18 states have call predecessors, (28), 19 states have call successors, (28) [2022-12-14 12:41:04,994 WARN L859 $PredicateComparison]: unable to prove that (and (< 0 |c_#StackHeapBarrier|) (exists ((v_DerPreprocessor_76 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251| Int) (v_DerPreprocessor_77 (Array Int Int))) (let ((.cse0 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251|))) (let ((.cse1 (select .cse0 24))) (and (= (select .cse0 0) .cse1) (<= (+ .cse1 2) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251|) (= (select |c_#memory_$Pointer$.base| .cse1) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_76) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251| v_DerPreprocessor_77) .cse1 v_DerPreprocessor_76) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251| v_DerPreprocessor_77) .cse1)) (<= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251|) (not (= .cse1 0)) (= .cse1 (select v_DerPreprocessor_77 24))))))) is different from true [2022-12-14 12:41:08,145 WARN L859 $PredicateComparison]: unable to prove that (and (< 0 |c_#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_252| Int) (v_DerPreprocessor_78 (Array Int Int)) (v_DerPreprocessor_79 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_252|))) (let ((.cse2 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_252|)) (.cse0 (select .cse1 24))) (and (= .cse0 (select .cse1 0)) (= (select .cse2 8) 0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_78) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_252| v_DerPreprocessor_79) .cse0 v_DerPreprocessor_78) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_252| v_DerPreprocessor_79) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= (select .cse2 16) 0) (= .cse0 (select v_DerPreprocessor_79 24)) (= (select .cse1 8) 0) (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_252|) (= (select .cse1 16) 0) (<= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_252|) (not (= .cse0 0)))))) (exists ((v_DerPreprocessor_76 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251| Int) (v_DerPreprocessor_77 (Array Int Int))) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251|))) (let ((.cse4 (select .cse3 24))) (and (= (select .cse3 0) .cse4) (<= (+ .cse4 2) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251|) (= (select |c_#memory_$Pointer$.base| .cse4) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_76) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251| v_DerPreprocessor_77) .cse4 v_DerPreprocessor_76) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251| v_DerPreprocessor_77) .cse4)) (<= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_251|) (not (= .cse4 0)) (= .cse4 (select v_DerPreprocessor_77 24))))))) is different from true [2022-12-14 12:41:20,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:41:20,030 INFO L93 Difference]: Finished difference Result 728 states and 839 transitions. [2022-12-14 12:41:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-14 12:41:20,031 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 2.6052631578947367) internal successors, (99), 36 states have internal predecessors, (99), 20 states have call successors, (29), 9 states have call predecessors, (29), 12 states have return successors, (28), 18 states have call predecessors, (28), 19 states have call successors, (28) Word has length 72 [2022-12-14 12:41:20,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:41:20,033 INFO L225 Difference]: With dead ends: 728 [2022-12-14 12:41:20,033 INFO L226 Difference]: Without dead ends: 677 [2022-12-14 12:41:20,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 167 SyntacticMatches, 9 SemanticMatches, 111 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 3848 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=797, Invalid=10715, Unknown=276, NotChecked=868, Total=12656 [2022-12-14 12:41:20,035 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 288 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 3595 mSolverCounterSat, 226 mSolverCounterUnsat, 278 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 4510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 3595 IncrementalHoareTripleChecker+Invalid, 278 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:41:20,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1016 Invalid, 4510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 3595 Invalid, 278 Unknown, 411 Unchecked, 9.5s Time] [2022-12-14 12:41:20,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-12-14 12:41:20,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 490. [2022-12-14 12:41:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 334 states have (on average 1.1377245508982037) internal successors, (380), 348 states have internal predecessors, (380), 84 states have call successors, (84), 60 states have call predecessors, (84), 71 states have return successors, (91), 81 states have call predecessors, (91), 77 states have call successors, (91) [2022-12-14 12:41:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 555 transitions. [2022-12-14 12:41:20,255 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 555 transitions. Word has length 72 [2022-12-14 12:41:20,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:41:20,255 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 555 transitions. [2022-12-14 12:41:20,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 2.6052631578947367) internal successors, (99), 36 states have internal predecessors, (99), 20 states have call successors, (29), 9 states have call predecessors, (29), 12 states have return successors, (28), 18 states have call predecessors, (28), 19 states have call successors, (28) [2022-12-14 12:41:20,256 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 555 transitions. [2022-12-14 12:41:20,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 12:41:20,256 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:41:20,256 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:41:20,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-14 12:41:20,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:41:20,457 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:41:20,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:41:20,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1838798104, now seen corresponding path program 1 times [2022-12-14 12:41:20,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:41:20,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312772376] [2022-12-14 12:41:20,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:41:20,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:41:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:41:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 12:41:21,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:41:21,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312772376] [2022-12-14 12:41:21,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312772376] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:41:21,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028367943] [2022-12-14 12:41:21,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:41:21,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:41:21,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:41:21,276 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:41:21,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcec65e3-080e-4143-8e34-7292410d875a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 12:41:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:41:21,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-14 12:41:21,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:41:23,630 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_100| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_103| Int)) (not (= (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_103| 16) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_100|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_103|)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_100| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_103| Int)) (not (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_100| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_100|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_103|))))) is different from true [2022-12-14 12:41:25,721 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_277| Int)) (not (= |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_277| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_277|) 0)))) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_277| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_277|) 0) 16)))) is different from true [2022-12-14 12:41:27,810 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_100| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_100|) 0) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_100|))) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_100| Int)) (not (= 16 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_100|) 0))))) is different from true [2022-12-14 12:41:37,917 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:41:52,024 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:42:02,130 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:42:12,258 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:42:20,387 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 12:42:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 53 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-12-14 12:42:20,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:42:22,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:42:22,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 31 [2022-12-14 12:42:22,922 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:42:22,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 25 [2022-12-14 12:42:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 2 proven. 56 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 12:42:22,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028367943] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:42:22,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2146668686] [2022-12-14 12:42:22,971 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-12-14 12:42:22,971 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:42:22,971 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:42:22,971 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:42:22,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:42:22,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,019 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 12:42:23,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-12-14 12:42:23,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,067 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 12:42:23,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 12:42:23,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,226 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:42:23,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,252 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:42:23,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-12-14 12:42:23,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-12-14 12:42:23,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:42:23,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,390 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-12-14 12:42:23,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 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 [2022-12-14 12:42:23,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,463 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 12:42:23,463 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 12:42:23,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 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 [2022-12-14 12:42:23,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 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 [2022-12-14 12:42:23,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:23,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 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 [2022-12-14 12:42:23,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:23,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:23,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:23,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:23,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:23,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:24,082 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-12-14 12:42:24,083 INFO L350 Elim1Store]: Elim1 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 666 treesize of output 675 [2022-12-14 12:42:24,387 INFO L321 Elim1Store]: treesize reduction 152, result has 18.7 percent of original size [2022-12-14 12:42:24,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 645 treesize of output 656 [2022-12-14 12:42:24,723 INFO L321 Elim1Store]: treesize reduction 208, result has 17.1 percent of original size [2022-12-14 12:42:24,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 648 treesize of output 666 [2022-12-14 12:42:24,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:24,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:24,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:24,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:24,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:24,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:24,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:24,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:24,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:24,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:25,007 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-12-14 12:42:25,007 INFO L350 Elim1Store]: Elim1 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 688 treesize of output 691 [2022-12-14 12:42:25,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:25,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 12:42:25,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:25,081 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-12-14 12:42:25,081 INFO L350 Elim1Store]: Elim1 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 682 treesize of output 635 [2022-12-14 12:42:25,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:25,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:25,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 656 treesize of output 635 [2022-12-14 12:42:33,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 12:42:33,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:33,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 12:42:33,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:33,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-12-14 12:42:33,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:42:33,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:33,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-12-14 12:42:33,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:33,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-12-14 12:42:33,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:42:33,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:33,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:42:33,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:33,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 12:42:33,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:33,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-12-14 12:42:33,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:33,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:42:33,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-12-14 12:42:34,479 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 54 for LOIs [2022-12-14 12:42:34,511 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2022-12-14 12:42:35,004 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-12-14 12:42:35,006 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-12-14 12:42:35,018 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 12:42:35,058 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:42:48,540 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21698#(and (<= |~#s_can_fail_allocator_static~0.base| 4) (<= 0 |#NULL.base|) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_237| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_237| Int)) (and (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_237| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_237|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_237| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_237|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_237| 24)))) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_237|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_237| 24)) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_237|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_237| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_237|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_237| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_237|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_237|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_237|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_237|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_237| 24))) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_237| 0))) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (<= 4 |~#s_can_fail_allocator_static~0.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-12-14 12:42:48,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:42:48,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:42:48,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 14] total 36 [2022-12-14 12:42:48,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423195077] [2022-12-14 12:42:48,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:42:48,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 12:42:48,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:42:48,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 12:42:48,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=3272, Unknown=13, NotChecked=354, Total=3906 [2022-12-14 12:42:48,542 INFO L87 Difference]: Start difference. First operand 490 states and 555 transitions. Second operand has 36 states, 33 states have (on average 3.0303030303030303) internal successors, (100), 34 states have internal predecessors, (100), 16 states have call successors, (29), 5 states have call predecessors, (29), 9 states have return successors, (28), 12 states have call predecessors, (28), 16 states have call successors, (28) [2022-12-14 12:42:50,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:42:52,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:42:56,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:42:58,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:43:05,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:43:07,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:43:13,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:43:15,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 12:43:17,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]