./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI --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 a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 --- 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-5e519f3 [2022-11-03 02:12:48,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:12:48,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:12:48,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:12:48,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:12:48,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:12:48,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:12:48,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:12:48,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:12:48,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:12:48,484 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:12:48,486 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:12:48,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:12:48,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:12:48,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:12:48,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:12:48,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:12:48,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:12:48,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:12:48,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:12:48,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:12:48,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:12:48,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:12:48,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:12:48,519 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:12:48,519 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:12:48,520 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:12:48,522 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:12:48,522 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:12:48,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:12:48,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:12:48,525 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:12:48,526 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:12:48,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:12:48,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:12:48,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:12:48,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:12:48,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:12:48,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:12:48,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:12:48,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:12:48,535 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:12:48,573 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:12:48,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:12:48,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:12:48,574 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:12:48,575 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:12:48,576 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:12:48,576 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:12:48,576 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:12:48,576 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:12:48,577 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:12:48,578 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:12:48,578 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:12:48,578 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:12:48,579 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:12:48,579 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:12:48,579 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:12:48,580 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:12:48,580 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:12:48,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:12:48,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:12:48,581 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:12:48,581 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:12:48,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:12:48,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:12:48,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:12:48,582 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:12:48,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:12:48,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:12:48,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:12:48,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:12:48,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:12:48,584 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:12:48,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:12:48,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:12:48,585 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:12:48,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:12:48,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:12:48,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:12:48,586 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_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 [2022-11-03 02:12:48,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:12:48,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:12:48,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:12:48,951 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:12:48,952 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:12:48,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2022-11-03 02:12:49,040 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/data/19a03fbfe/464ecbde3e064f2ea5e612f9a3c5332e/FLAG229b7165a [2022-11-03 02:12:49,853 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:12:49,853 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2022-11-03 02:12:49,897 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/data/19a03fbfe/464ecbde3e064f2ea5e612f9a3c5332e/FLAG229b7165a [2022-11-03 02:12:50,035 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/data/19a03fbfe/464ecbde3e064f2ea5e612f9a3c5332e [2022-11-03 02:12:50,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:12:50,040 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:12:50,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:12:50,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:12:50,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:12:50,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:12:50" (1/1) ... [2022-11-03 02:12:50,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4109d761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:50, skipping insertion in model container [2022-11-03 02:12:50,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:12:50" (1/1) ... [2022-11-03 02:12:50,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:12:50,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:12:50,525 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2022-11-03 02:12:50,535 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2022-11-03 02:12:51,347 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:51,348 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:51,349 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:51,350 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:51,351 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:51,364 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:51,365 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:51,367 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:51,368 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:51,370 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:51,371 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:51,371 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:51,372 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:51,716 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:12:51,718 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:12:51,719 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:12:51,720 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:12:51,721 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:12:51,722 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:12:51,723 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:12:51,724 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:12:51,724 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:12:51,725 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:12:51,907 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:12:51,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:12:51,963 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:12:51,987 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2022-11-03 02:12:51,988 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2022-11-03 02:12:52,054 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:52,054 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:52,055 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:52,055 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:52,056 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:52,063 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:52,070 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:52,073 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:52,074 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:52,075 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:52,076 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:52,077 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:52,077 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 02:12:52,140 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 02:12:52,141 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 02:12:52,142 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 02:12:52,143 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 02:12:52,144 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 02:12:52,144 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 02:12:52,145 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 02:12:52,145 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 02:12:52,146 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 02:12:52,146 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 02:12:52,178 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 02:12:52,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:12:52,475 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:12:52,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:52 WrapperNode [2022-11-03 02:12:52,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:12:52,477 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:12:52,477 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:12:52,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:12:52,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:52" (1/1) ... [2022-11-03 02:12:52,587 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:52" (1/1) ... [2022-11-03 02:12:52,623 INFO L138 Inliner]: procedures = 679, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 136 [2022-11-03 02:12:52,628 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:12:52,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:12:52,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:12:52,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:12:52,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:52" (1/1) ... [2022-11-03 02:12:52,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:52" (1/1) ... [2022-11-03 02:12:52,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:52" (1/1) ... [2022-11-03 02:12:52,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:52" (1/1) ... [2022-11-03 02:12:52,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:52" (1/1) ... [2022-11-03 02:12:52,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:52" (1/1) ... [2022-11-03 02:12:52,689 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:52" (1/1) ... [2022-11-03 02:12:52,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:52" (1/1) ... [2022-11-03 02:12:52,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:12:52,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:12:52,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:12:52,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:12:52,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:52" (1/1) ... [2022-11-03 02:12:52,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:12:52,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:12:52,759 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:12:52,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:12:52,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:12:52,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:12:52,816 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:12:52,816 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-03 02:12:52,816 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-03 02:12:52,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:12:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-03 02:12:52,817 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-03 02:12:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:12:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:12:52,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:12:52,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:12:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:12:52,818 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:12:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:12:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:12:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:12:52,818 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-03 02:12:52,819 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-03 02:12:52,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:12:53,088 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:12:53,090 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:12:53,379 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:12:53,532 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:12:53,532 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:12:53,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:12:53 BoogieIcfgContainer [2022-11-03 02:12:53,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:12:53,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:12:53,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:12:53,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:12:53,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:12:50" (1/3) ... [2022-11-03 02:12:53,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d2cf3dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:12:53, skipping insertion in model container [2022-11-03 02:12:53,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:12:52" (2/3) ... [2022-11-03 02:12:53,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d2cf3dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:12:53, skipping insertion in model container [2022-11-03 02:12:53,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:12:53" (3/3) ... [2022-11-03 02:12:53,544 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_end_harness.i [2022-11-03 02:12:53,566 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:12:53,566 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:12:53,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:12:53,626 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;@2c7353fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:12:53,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:12:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 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) [2022-11-03 02:12:53,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 02:12:53,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:53,642 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] [2022-11-03 02:12:53,643 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:53,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:53,650 INFO L85 PathProgramCache]: Analyzing trace with hash -901301471, now seen corresponding path program 1 times [2022-11-03 02:12:53,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:53,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258377431] [2022-11-03 02:12:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:53,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:12:54,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:54,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258377431] [2022-11-03 02:12:54,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258377431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:12:54,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674082892] [2022-11-03 02:12:54,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:54,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:12:54,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:12:54,412 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:12:54,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:12:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:54,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-03 02:12:54,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:54,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:12:54,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:12:54,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:54,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:54,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:54,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-11-03 02:12:54,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:54,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:54,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:54,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-11-03 02:12:57,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:57,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:57,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:12:57,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:57,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:12:57,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:57,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:57,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:12:57,416 INFO L356 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-03 02:12:57,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 8 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 132 treesize of output 78 [2022-11-03 02:12:57,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:57,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:57,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:12:57,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:57,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:12:57,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:12:57,436 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:12:57,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 73 treesize of output 31 [2022-11-03 02:12:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:12:57,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:57,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674082892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:57,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:12:57,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-11-03 02:12:57,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736318337] [2022-11-03 02:12:57,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:57,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:12:57,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:57,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:12:57,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:12:57,492 INFO L87 Difference]: Start difference. First operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 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 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:12:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:58,051 INFO L93 Difference]: Finished difference Result 115 states and 170 transitions. [2022-11-03 02:12:58,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:12:58,054 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2022-11-03 02:12:58,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:58,063 INFO L225 Difference]: With dead ends: 115 [2022-11-03 02:12:58,063 INFO L226 Difference]: Without dead ends: 77 [2022-11-03 02:12:58,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:12:58,069 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 14 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:58,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 249 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 121 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2022-11-03 02:12:58,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-03 02:12:58,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2022-11-03 02:12:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-11-03 02:12:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2022-11-03 02:12:58,133 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 37 [2022-11-03 02:12:58,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:58,134 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2022-11-03 02:12:58,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 02:12:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2022-11-03 02:12:58,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 02:12:58,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:58,138 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] [2022-11-03 02:12:58,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:58,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-03 02:12:58,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:58,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:58,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2094600787, now seen corresponding path program 1 times [2022-11-03 02:12:58,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:58,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66478844] [2022-11-03 02:12:58,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:58,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:12:58,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:58,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66478844] [2022-11-03 02:12:58,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66478844] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:12:58,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289773986] [2022-11-03 02:12:58,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:58,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:12:58,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:12:58,693 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:12:58,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:12:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:58,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-03 02:12:58,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:59,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:12:59,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:12:59,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:59,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:59,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 02:12:59,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:59,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-03 02:12:59,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:59,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:59,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 02:12:59,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:59,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-03 02:12:59,237 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:12:59,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_58| input size 65 context size 65 output size 65 [2022-11-03 02:12:59,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1163304068] [2022-11-03 02:12:59,274 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-03 02:12:59,275 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:12:59,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:12:59,284 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:12:59,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:12:59,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:59,416 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 02:12:59,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 02:12:59,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:59,521 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:12:59,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:12:59,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:59,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:12:59,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:12:59,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:59,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:59,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:59,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:59,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:12:59,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:13:00,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:13:00,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:13:00,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:13:00,124 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:13:00,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:13:00,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:13:00,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:13:00,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,325 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:13:00,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:13:00,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2022-11-03 02:13:00,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:13:00,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:13:00,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:13:00,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:13:00,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:13:00,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 02:13:00,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:13:00,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:13:00,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:13:00,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:13:00,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:13:00,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 02:13:00,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 02:13:00,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 02:13:00,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:13:00,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:13:00,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:13:00,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:13:00,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:00,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:13:01,508 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-03 02:13:01,741 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 144 for LOIs [2022-11-03 02:13:01,827 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 02:13:01,856 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:13:04,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1163304068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:04,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:13:04,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5] total 16 [2022-11-03 02:13:04,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071403332] [2022-11-03 02:13:04,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:04,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:13:04,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:13:04,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:13:04,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:13:04,952 INFO L87 Difference]: Start difference. First operand 54 states and 71 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) [2022-11-03 02:13:05,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:05,541 INFO L93 Difference]: Finished difference Result 98 states and 125 transitions. [2022-11-03 02:13:05,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:13:05,542 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 [2022-11-03 02:13:05,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:05,544 INFO L225 Difference]: With dead ends: 98 [2022-11-03 02:13:05,544 INFO L226 Difference]: Without dead ends: 51 [2022-11-03 02:13:05,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-11-03 02:13:05,546 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:05,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 247 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-11-03 02:13:05,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-03 02:13:05,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2022-11-03 02:13:05,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 02:13:05,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-11-03 02:13:05,560 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 38 [2022-11-03 02:13:05,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:05,560 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-11-03 02:13:05,561 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) [2022-11-03 02:13:05,561 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-11-03 02:13:05,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 02:13:05,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:05,562 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] [2022-11-03 02:13:05,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:05,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:05,778 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:05,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:05,779 INFO L85 PathProgramCache]: Analyzing trace with hash -896843747, now seen corresponding path program 1 times [2022-11-03 02:13:05,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:05,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767952910] [2022-11-03 02:13:05,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:05,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:13:05,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:05,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767952910] [2022-11-03 02:13:05,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767952910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:13:05,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49959151] [2022-11-03 02:13:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:05,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:05,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:05,979 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:13:06,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:13:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:06,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:13:06,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:13:06,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:06,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49959151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:06,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:13:06,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-03 02:13:06,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324183232] [2022-11-03 02:13:06,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:06,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:13:06,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:13:06,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:13:06,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:13:06,227 INFO L87 Difference]: Start difference. First operand 47 states and 59 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) [2022-11-03 02:13:06,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:06,395 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2022-11-03 02:13:06,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:13:06,395 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 [2022-11-03 02:13:06,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:06,396 INFO L225 Difference]: With dead ends: 86 [2022-11-03 02:13:06,396 INFO L226 Difference]: Without dead ends: 52 [2022-11-03 02:13:06,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:13:06,398 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:06,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 141 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:13:06,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-03 02:13:06,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-03 02:13:06,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-03 02:13:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-11-03 02:13:06,412 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 39 [2022-11-03 02:13:06,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:06,413 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-11-03 02:13:06,413 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) [2022-11-03 02:13:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-11-03 02:13:06,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 02:13:06,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:06,415 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] [2022-11-03 02:13:06,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:06,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:06,638 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:06,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:06,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2017391933, now seen corresponding path program 1 times [2022-11-03 02:13:06,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:06,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292824922] [2022-11-03 02:13:06,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:06,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:13:06,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:06,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292824922] [2022-11-03 02:13:06,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292824922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:13:06,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498327811] [2022-11-03 02:13:06,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:06,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:06,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:06,897 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:13:06,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:13:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:07,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:13:07,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:13:07,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:07,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498327811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:07,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:13:07,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-03 02:13:07,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380545009] [2022-11-03 02:13:07,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:07,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:13:07,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:13:07,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:13:07,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:13:07,160 INFO L87 Difference]: Start difference. First operand 52 states and 67 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) [2022-11-03 02:13:07,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:07,416 INFO L93 Difference]: Finished difference Result 103 states and 141 transitions. [2022-11-03 02:13:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:13:07,416 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 [2022-11-03 02:13:07,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:07,418 INFO L225 Difference]: With dead ends: 103 [2022-11-03 02:13:07,418 INFO L226 Difference]: Without dead ends: 64 [2022-11-03 02:13:07,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:13:07,419 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 63 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:07,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 165 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:13:07,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-03 02:13:07,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-11-03 02:13:07,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-03 02:13:07,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2022-11-03 02:13:07,440 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 41 [2022-11-03 02:13:07,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:07,441 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2022-11-03 02:13:07,443 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) [2022-11-03 02:13:07,443 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2022-11-03 02:13:07,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 02:13:07,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:07,448 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] [2022-11-03 02:13:07,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:07,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:07,662 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:07,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:07,663 INFO L85 PathProgramCache]: Analyzing trace with hash -292506448, now seen corresponding path program 1 times [2022-11-03 02:13:07,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:07,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463626626] [2022-11-03 02:13:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:07,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:13:07,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:07,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463626626] [2022-11-03 02:13:07,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463626626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:13:07,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563140492] [2022-11-03 02:13:07,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:07,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:07,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:07,946 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:13:07,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:13:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:08,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:13:08,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:13:08,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:08,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563140492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:08,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:13:08,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-03 02:13:08,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29731580] [2022-11-03 02:13:08,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:08,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:13:08,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:13:08,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:13:08,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:13:08,152 INFO L87 Difference]: Start difference. First operand 54 states and 70 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) [2022-11-03 02:13:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:08,212 INFO L93 Difference]: Finished difference Result 104 states and 145 transitions. [2022-11-03 02:13:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:13:08,213 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 [2022-11-03 02:13:08,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:08,217 INFO L225 Difference]: With dead ends: 104 [2022-11-03 02:13:08,217 INFO L226 Difference]: Without dead ends: 63 [2022-11-03 02:13:08,221 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 [2022-11-03 02:13:08,223 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:08,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:13:08,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-03 02:13:08,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-11-03 02:13:08,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-03 02:13:08,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-11-03 02:13:08,252 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 42 [2022-11-03 02:13:08,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:08,254 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-11-03 02:13:08,254 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) [2022-11-03 02:13:08,255 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-11-03 02:13:08,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:13:08,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:08,259 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] [2022-11-03 02:13:08,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:08,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:08,474 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:08,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:08,475 INFO L85 PathProgramCache]: Analyzing trace with hash 449901180, now seen corresponding path program 1 times [2022-11-03 02:13:08,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:08,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057069588] [2022-11-03 02:13:08,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:08,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:13:08,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:08,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057069588] [2022-11-03 02:13:08,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057069588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:13:08,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532156367] [2022-11-03 02:13:08,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:08,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:08,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:08,696 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:13:08,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:13:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:08,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 02:13:08,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:09,023 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-03 02:13:09,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-03 02:13:09,044 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:13:09,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-03 02:13:09,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 02:13:09,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-03 02:13:09,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:09,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2022-11-03 02:13:09,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:13:34,426 WARN L234 SmtUtils]: Spent 20.56s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:13:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:13:40,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:13:44,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532156367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:44,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1068147230] [2022-11-03 02:13:44,490 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-03 02:13:44,490 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:13:44,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:13:44,491 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:13:44,491 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:13:44,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:44,569 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 02:13:44,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 02:13:44,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:44,655 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:13:44,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:13:44,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:44,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:44,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:44,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:44,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:44,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:13:44,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:13:45,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:45,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:13:45,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:45,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:45,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:45,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:45,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:45,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:13:45,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:13:45,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:45,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:45,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:45,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:45,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:45,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:13:45,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:45,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:13:45,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:45,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:45,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:45,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:45,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:45,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 02:13:46,007 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 131 for LOIs [2022-11-03 02:13:46,640 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 183 for LOIs [2022-11-03 02:13:46,748 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 02:13:46,771 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-03 02:13:46,851 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:13:54,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1068147230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:54,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:13:54,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14, 8] total 42 [2022-11-03 02:13:54,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443916279] [2022-11-03 02:13:54,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:54,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:13:54,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:13:54,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:13:54,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1522, Unknown=1, NotChecked=0, Total=1722 [2022-11-03 02:13:54,543 INFO L87 Difference]: Start difference. First operand 55 states and 71 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) [2022-11-03 02:13:56,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:56,908 INFO L93 Difference]: Finished difference Result 121 states and 158 transitions. [2022-11-03 02:13:56,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:13:56,909 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 [2022-11-03 02:13:56,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:56,910 INFO L225 Difference]: With dead ends: 121 [2022-11-03 02:13:56,910 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 02:13:56,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 89 SyntacticMatches, 10 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=246, Invalid=1733, Unknown=1, NotChecked=0, Total=1980 [2022-11-03 02:13:56,916 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:56,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 248 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 228 Invalid, 0 Unknown, 47 Unchecked, 0.6s Time] [2022-11-03 02:13:56,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 02:13:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-03 02:13:56,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 50 states have internal predecessors, (59), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (20), 14 states have call predecessors, (20), 15 states have call successors, (20) [2022-11-03 02:13:56,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2022-11-03 02:13:56,950 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 45 [2022-11-03 02:13:56,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:56,950 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2022-11-03 02:13:56,950 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) [2022-11-03 02:13:56,950 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2022-11-03 02:13:56,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:13:56,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:56,951 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] [2022-11-03 02:13:56,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:13:57,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:13:57,159 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:57,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:57,159 INFO L85 PathProgramCache]: Analyzing trace with hash 452556718, now seen corresponding path program 1 times [2022-11-03 02:13:57,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:57,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922278477] [2022-11-03 02:13:57,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:57,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:13:57,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:57,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922278477] [2022-11-03 02:13:57,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922278477] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:13:57,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007577586] [2022-11-03 02:13:57,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:57,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:57,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:57,435 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:13:57,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:13:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:57,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-03 02:13:57,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:57,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 02:13:57,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:57,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 02:13:57,854 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:13:57,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_72| input size 53 context size 53 output size 53 [2022-11-03 02:13:57,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [858605522] [2022-11-03 02:13:57,856 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-03 02:13:57,857 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:13:57,857 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:13:57,857 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:13:57,857 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:13:57,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:57,948 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:13:57,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:13:57,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:57,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 02:13:58,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:13:58,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:13:58,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:13:58,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:13:58,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:13:58,421 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:13:58,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:13:58,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:13:58,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:13:58,481 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:13:58,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:13:58,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,607 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:13:58,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:13:58,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:13:58,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2022-11-03 02:13:58,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:13:58,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:13:58,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:13:58,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:13:58,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:13:58,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 02:13:58,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:13:58,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:13:58,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:13:58,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:13:58,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:13:58,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:13:58,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:58,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 02:13:59,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:59,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:13:59,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:59,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:13:59,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:59,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:13:59,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:59,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:59,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:13:59,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:59,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:13:59,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:59,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:13:59,852 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-11-03 02:14:00,297 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 164 for LOIs [2022-11-03 02:14:00,354 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 02:14:00,375 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-03 02:14:00,447 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:14:04,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [858605522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:04,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:14:04,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6] total 24 [2022-11-03 02:14:04,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883948187] [2022-11-03 02:14:04,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:04,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:14:04,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:14:04,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:14:04,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:14:04,923 INFO L87 Difference]: Start difference. First operand 74 states and 95 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) [2022-11-03 02:14:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:05,481 INFO L93 Difference]: Finished difference Result 128 states and 165 transitions. [2022-11-03 02:14:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:14:05,484 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 [2022-11-03 02:14:05,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:05,485 INFO L225 Difference]: With dead ends: 128 [2022-11-03 02:14:05,485 INFO L226 Difference]: Without dead ends: 81 [2022-11-03 02:14:05,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-11-03 02:14:05,487 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:05,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 191 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 210 Invalid, 0 Unknown, 157 Unchecked, 0.4s Time] [2022-11-03 02:14:05,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-03 02:14:05,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-03 02:14:05,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 55 states have internal predecessors, (66), 17 states have call successors, (17), 10 states have call predecessors, (17), 11 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) [2022-11-03 02:14:05,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2022-11-03 02:14:05,516 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 46 [2022-11-03 02:14:05,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:05,517 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2022-11-03 02:14:05,517 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) [2022-11-03 02:14:05,517 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2022-11-03 02:14:05,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:14:05,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:05,518 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] [2022-11-03 02:14:05,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:05,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:05,726 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:05,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:05,727 INFO L85 PathProgramCache]: Analyzing trace with hash -580673182, now seen corresponding path program 1 times [2022-11-03 02:14:05,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:14:05,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9172875] [2022-11-03 02:14:05,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:05,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:14:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:14:06,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:14:06,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9172875] [2022-11-03 02:14:06,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9172875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:14:06,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90586898] [2022-11-03 02:14:06,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:06,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:06,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:06,623 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:14:06,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:14:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:06,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 02:14:06,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:16,760 WARN L234 SmtUtils]: Spent 8.37s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:14:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 02:14:17,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:14:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:14:18,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90586898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:14:18,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [58339999] [2022-11-03 02:14:18,349 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:14:18,349 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:14:18,350 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:14:18,350 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:14:18,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:14:18,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,449 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:14:18,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:14:18,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 02:14:18,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:14:18,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:14:18,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:14:18,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:14:18,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:14:18,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:14:18,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:14:18,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:18,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 02:14:19,681 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 136 for LOIs [2022-11-03 02:14:20,791 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 180 for LOIs [2022-11-03 02:14:20,884 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 02:14:20,905 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:14:20,981 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:14:41,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [58339999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:41,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:14:41,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-03 02:14:41,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101587078] [2022-11-03 02:14:41,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:41,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 02:14:41,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:14:41,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 02:14:41,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1160, Unknown=6, NotChecked=0, Total=1332 [2022-11-03 02:14:41,516 INFO L87 Difference]: Start difference. First operand 81 states and 104 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) [2022-11-03 02:14:43,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:43,004 INFO L93 Difference]: Finished difference Result 146 states and 196 transitions. [2022-11-03 02:14:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 02:14:43,005 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 [2022-11-03 02:14:43,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:43,006 INFO L225 Difference]: With dead ends: 146 [2022-11-03 02:14:43,006 INFO L226 Difference]: Without dead ends: 98 [2022-11-03 02:14:43,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=186, Invalid=1290, Unknown=6, NotChecked=0, Total=1482 [2022-11-03 02:14:43,008 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 96 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:43,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 170 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 247 Invalid, 0 Unknown, 185 Unchecked, 0.8s Time] [2022-11-03 02:14:43,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-03 02:14:43,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2022-11-03 02:14:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.25) internal successors, (65), 55 states have internal predecessors, (65), 17 states have call successors, (17), 10 states have call predecessors, (17), 11 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) [2022-11-03 02:14:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2022-11-03 02:14:43,050 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 47 [2022-11-03 02:14:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:43,050 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2022-11-03 02:14:43,051 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) [2022-11-03 02:14:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2022-11-03 02:14:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 02:14:43,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:43,052 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] [2022-11-03 02:14:43,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:43,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:43,266 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:43,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:43,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1971298836, now seen corresponding path program 1 times [2022-11-03 02:14:43,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:14:43,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78378559] [2022-11-03 02:14:43,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:43,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:14:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:14:44,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:14:44,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78378559] [2022-11-03 02:14:44,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78378559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:14:44,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854949560] [2022-11-03 02:14:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:44,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:44,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:44,091 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:14:44,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:14:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:44,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-03 02:14:44,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:44,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 02:14:44,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:44,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 02:14:44,502 INFO L356 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-03 02:14:44,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_82| input size 47 context size 47 output size 47 [2022-11-03 02:14:44,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [117021072] [2022-11-03 02:14:44,504 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:14:44,505 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:14:44,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:14:44,505 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:14:44,505 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:14:44,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:44,586 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 02:14:44,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 02:14:44,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:44,661 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:14:44,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:14:44,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:44,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:44,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:44,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:44,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:44,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:14:44,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:14:44,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:44,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:44,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:44,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:44,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:44,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:14:44,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:44,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:14:45,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:14:45,096 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:14:45,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:14:45,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,216 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:14:45,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:14:45,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:14:45,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2022-11-03 02:14:45,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:14:45,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:14:45,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:14:45,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:14:45,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:14:45,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 02:14:45,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 02:14:45,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:14:45,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:14:45,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:14:45,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:14:45,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:14:45,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 02:14:45,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:14:45,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:14:45,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:14:45,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:14:45,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:14:45,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:14:45,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:14:45,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:14:45,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:14:46,437 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-11-03 02:14:47,251 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 164 for LOIs [2022-11-03 02:14:47,308 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 02:14:47,328 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:14:47,399 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:14:51,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [117021072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:14:51,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:14:51,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8] total 27 [2022-11-03 02:14:51,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219612881] [2022-11-03 02:14:51,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:14:51,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 02:14:51,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:14:51,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 02:14:51,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:14:51,842 INFO L87 Difference]: Start difference. First operand 81 states and 103 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) [2022-11-03 02:14:52,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:14:52,684 INFO L93 Difference]: Finished difference Result 149 states and 185 transitions. [2022-11-03 02:14:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:14:52,686 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 [2022-11-03 02:14:52,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:14:52,687 INFO L225 Difference]: With dead ends: 149 [2022-11-03 02:14:52,687 INFO L226 Difference]: Without dead ends: 97 [2022-11-03 02:14:52,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:14:52,689 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 37 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:14:52,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 182 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 334 Invalid, 0 Unknown, 154 Unchecked, 0.6s Time] [2022-11-03 02:14:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-03 02:14:52,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2022-11-03 02:14:52,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 61 states have internal predecessors, (72), 18 states have call successors, (18), 11 states have call predecessors, (18), 12 states have return successors, (19), 16 states have call predecessors, (19), 17 states have call successors, (19) [2022-11-03 02:14:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 109 transitions. [2022-11-03 02:14:52,727 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 109 transitions. Word has length 48 [2022-11-03 02:14:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:14:52,728 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 109 transitions. [2022-11-03 02:14:52,728 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) [2022-11-03 02:14:52,728 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 109 transitions. [2022-11-03 02:14:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-03 02:14:52,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:14:52,729 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] [2022-11-03 02:14:52,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:14:52,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:52,942 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:14:52,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:14:52,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1296101873, now seen corresponding path program 1 times [2022-11-03 02:14:52,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:14:52,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140031608] [2022-11-03 02:14:52,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:52,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:14:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 02:14:53,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:14:53,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140031608] [2022-11-03 02:14:53,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140031608] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:14:53,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323225914] [2022-11-03 02:14:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:14:53,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:14:53,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:14:53,157 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:14:53,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:14:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:14:53,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-03 02:14:53,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:14:53,510 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-03 02:14:53,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-03 02:14:53,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 02:14:53,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-03 02:14:53,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2022-11-03 02:14:53,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:14:53,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-03 02:15:16,603 WARN L234 SmtUtils]: Spent 19.51s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:15:19,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:15:19,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:19,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:19,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:15:19,341 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:15:19,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 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 [2022-11-03 02:15:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:19,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:19,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:15:19,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:19,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:15:19,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:15:19,358 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:15:19,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 77 treesize of output 35 [2022-11-03 02:15:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:15:19,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:15:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:15:23,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323225914] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:15:23,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2113988318] [2022-11-03 02:15:23,786 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:15:23,787 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:15:23,787 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:15:23,787 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:15:23,787 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:15:23,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:23,880 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:15:23,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:15:23,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:23,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 02:15:24,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:15:24,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:15:24,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:15:24,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:15:24,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:15:24,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:15:24,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:15:24,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:15:24,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 02:15:25,987 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 137 for LOIs [2022-11-03 02:15:26,079 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 02:15:26,830 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:15:26,831 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 02:15:26,849 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:15:26,910 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:15:38,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4114#(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))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= (mod __VERIFIER_assert_~cond 256) 0) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3| Int)) (and (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 1) (not (= 0 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 24)) 0) |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) (<= 0 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 24)) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 8) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 24)) 0) 16) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|)) (not (= 4 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 24) |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 16) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 16) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 8) 0) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 24) 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)) (= 78 (select |#length| 4)) (= (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) (= 40 (select |#length| 5)) (= (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) (= 5 |~#s_can_fail_allocator_static~0.base|) (= 30 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:15:38,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:15:38,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:15:38,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 17, 11] total 29 [2022-11-03 02:15:38,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017540558] [2022-11-03 02:15:38,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:15:38,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-03 02:15:38,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:38,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-03 02:15:38,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=2720, Unknown=1, NotChecked=0, Total=3080 [2022-11-03 02:15:38,756 INFO L87 Difference]: Start difference. First operand 89 states and 109 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) [2022-11-03 02:15:42,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:42,639 INFO L93 Difference]: Finished difference Result 264 states and 427 transitions. [2022-11-03 02:15:42,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 02:15:42,640 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 [2022-11-03 02:15:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:42,643 INFO L225 Difference]: With dead ends: 264 [2022-11-03 02:15:42,643 INFO L226 Difference]: Without dead ends: 223 [2022-11-03 02:15:42,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=484, Invalid=4207, Unknown=1, NotChecked=0, Total=4692 [2022-11-03 02:15:42,647 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 90 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 2119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 499 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:42,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 620 Invalid, 2119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1490 Invalid, 0 Unknown, 499 Unchecked, 2.3s Time] [2022-11-03 02:15:42,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-03 02:15:42,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 154. [2022-11-03 02:15:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 100 states have (on average 1.26) internal successors, (126), 108 states have internal predecessors, (126), 33 states have call successors, (33), 14 states have call predecessors, (33), 20 states have return successors, (52), 31 states have call predecessors, (52), 32 states have call successors, (52) [2022-11-03 02:15:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 211 transitions. [2022-11-03 02:15:42,750 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 211 transitions. Word has length 48 [2022-11-03 02:15:42,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:42,751 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 211 transitions. [2022-11-03 02:15:42,751 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) [2022-11-03 02:15:42,751 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 211 transitions. [2022-11-03 02:15:42,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:15:42,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:42,752 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] [2022-11-03 02:15:42,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:42,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:15:42,955 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:42,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:42,956 INFO L85 PathProgramCache]: Analyzing trace with hash -150880783, now seen corresponding path program 1 times [2022-11-03 02:15:42,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:42,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692996838] [2022-11-03 02:15:42,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:42,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:15:43,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:43,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692996838] [2022-11-03 02:15:43,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692996838] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:43,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434062401] [2022-11-03 02:15:43,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:43,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:43,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:43,333 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:43,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:15:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:43,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:15:43,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:15:43,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:43,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434062401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:43,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:15:43,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2022-11-03 02:15:43,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606736740] [2022-11-03 02:15:43,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:43,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:15:43,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:43,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:15:43,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:15:43,687 INFO L87 Difference]: Start difference. First operand 154 states and 211 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 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) [2022-11-03 02:15:43,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:43,953 INFO L93 Difference]: Finished difference Result 213 states and 299 transitions. [2022-11-03 02:15:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:15:43,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 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 52 [2022-11-03 02:15:43,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:43,959 INFO L225 Difference]: With dead ends: 213 [2022-11-03 02:15:43,959 INFO L226 Difference]: Without dead ends: 154 [2022-11-03 02:15:43,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:15:43,961 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 37 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:43,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 156 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:15:43,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-03 02:15:44,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-11-03 02:15:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 100 states have (on average 1.23) internal successors, (123), 108 states have internal predecessors, (123), 33 states have call successors, (33), 14 states have call predecessors, (33), 20 states have return successors, (52), 31 states have call predecessors, (52), 32 states have call successors, (52) [2022-11-03 02:15:44,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 208 transitions. [2022-11-03 02:15:44,057 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 208 transitions. Word has length 52 [2022-11-03 02:15:44,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:44,057 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 208 transitions. [2022-11-03 02:15:44,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 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) [2022-11-03 02:15:44,057 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 208 transitions. [2022-11-03 02:15:44,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 02:15:44,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:44,059 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] [2022-11-03 02:15:44,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:44,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:15:44,286 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:44,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:44,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1472805831, now seen corresponding path program 1 times [2022-11-03 02:15:44,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:44,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211195962] [2022-11-03 02:15:44,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:44,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:15:44,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:44,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211195962] [2022-11-03 02:15:44,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211195962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:44,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429482750] [2022-11-03 02:15:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:44,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:44,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:44,651 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:44,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:15:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:44,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:15:44,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:15:45,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:15:45,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429482750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:15:45,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:15:45,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2022-11-03 02:15:45,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141356075] [2022-11-03 02:15:45,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:15:45,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:15:45,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:15:45,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:15:45,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:15:45,054 INFO L87 Difference]: Start difference. First operand 154 states and 208 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 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) [2022-11-03 02:15:45,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:15:45,379 INFO L93 Difference]: Finished difference Result 222 states and 308 transitions. [2022-11-03 02:15:45,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:15:45,380 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 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 55 [2022-11-03 02:15:45,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:15:45,381 INFO L225 Difference]: With dead ends: 222 [2022-11-03 02:15:45,381 INFO L226 Difference]: Without dead ends: 162 [2022-11-03 02:15:45,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:15:45,382 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 50 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:15:45,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 185 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:15:45,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-03 02:15:45,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 150. [2022-11-03 02:15:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 97 states have (on average 1.2164948453608246) internal successors, (118), 104 states have internal predecessors, (118), 33 states have call successors, (33), 14 states have call predecessors, (33), 19 states have return successors, (46), 31 states have call predecessors, (46), 32 states have call successors, (46) [2022-11-03 02:15:45,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 197 transitions. [2022-11-03 02:15:45,441 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 197 transitions. Word has length 55 [2022-11-03 02:15:45,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:15:45,442 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 197 transitions. [2022-11-03 02:15:45,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 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) [2022-11-03 02:15:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 197 transitions. [2022-11-03 02:15:45,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-03 02:15:45,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:15:45,443 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] [2022-11-03 02:15:45,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:15:45,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:15:45,645 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:15:45,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:15:45,645 INFO L85 PathProgramCache]: Analyzing trace with hash -575846176, now seen corresponding path program 1 times [2022-11-03 02:15:45,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:15:45,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059101992] [2022-11-03 02:15:45,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:45,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:15:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-03 02:15:45,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:15:45,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059101992] [2022-11-03 02:15:45,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059101992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:15:45,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063869996] [2022-11-03 02:15:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:15:45,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:15:45,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:15:45,897 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:15:45,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:15:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:15:46,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-03 02:15:46,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:15:55,892 WARN L234 SmtUtils]: Spent 8.40s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:16:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:16:01,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:16:07,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063869996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:07,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1932936262] [2022-11-03 02:16:07,963 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-03 02:16:07,964 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:16:07,964 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:16:07,964 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:16:07,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:16:07,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,037 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 02:16:08,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 02:16:08,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,127 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:16:08,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:16:08,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:16:08,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:16:08,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:16:08,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:16:08,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 02:16:08,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:16:08,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:16:08,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:08,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:16:09,234 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 131 for LOIs [2022-11-03 02:16:10,152 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 188 for LOIs [2022-11-03 02:16:10,228 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 02:16:10,245 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:16:10,309 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:16:29,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1932936262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:29,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:16:29,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 13, 8] total 40 [2022-11-03 02:16:29,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756287537] [2022-11-03 02:16:29,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:29,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:16:29,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:29,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:16:29,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1368, Unknown=7, NotChecked=0, Total=1560 [2022-11-03 02:16:29,442 INFO L87 Difference]: Start difference. First operand 150 states and 197 transitions. Second operand has 20 states, 15 states have (on average 1.4666666666666666) 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) [2022-11-03 02:16:33,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:33,859 INFO L93 Difference]: Finished difference Result 258 states and 359 transitions. [2022-11-03 02:16:33,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:16:33,860 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.4666666666666666) 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 59 [2022-11-03 02:16:33,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:33,861 INFO L225 Difference]: With dead ends: 258 [2022-11-03 02:16:33,862 INFO L226 Difference]: Without dead ends: 204 [2022-11-03 02:16:33,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 132 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=264, Invalid=1709, Unknown=7, NotChecked=0, Total=1980 [2022-11-03 02:16:33,863 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 70 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:33,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 244 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 573 Invalid, 0 Unknown, 180 Unchecked, 1.5s Time] [2022-11-03 02:16:33,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-03 02:16:33,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 181. [2022-11-03 02:16:33,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 114 states have (on average 1.1929824561403508) internal successors, (136), 121 states have internal predecessors, (136), 46 states have call successors, (46), 15 states have call predecessors, (46), 20 states have return successors, (64), 44 states have call predecessors, (64), 45 states have call successors, (64) [2022-11-03 02:16:33,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 246 transitions. [2022-11-03 02:16:33,958 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 246 transitions. Word has length 59 [2022-11-03 02:16:33,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:33,959 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 246 transitions. [2022-11-03 02:16:33,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.4666666666666666) 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) [2022-11-03 02:16:33,959 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 246 transitions. [2022-11-03 02:16:33,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-03 02:16:33,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:33,961 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] [2022-11-03 02:16:33,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:34,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:34,162 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:34,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:34,163 INFO L85 PathProgramCache]: Analyzing trace with hash 48483986, now seen corresponding path program 1 times [2022-11-03 02:16:34,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:34,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865432241] [2022-11-03 02:16:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:34,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:16:34,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:34,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865432241] [2022-11-03 02:16:34,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865432241] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:16:34,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241570733] [2022-11-03 02:16:34,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:34,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:34,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:34,437 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:16:34,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:16:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:34,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-03 02:16:34,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:34,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 02:16:34,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:34,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 02:16:34,967 INFO L356 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-03 02:16:34,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_102| input size 46 context size 46 output size 46 [2022-11-03 02:16:34,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2128430723] [2022-11-03 02:16:34,969 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-03 02:16:34,969 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:16:34,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:16:34,970 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:16:34,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:16:34,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,050 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 02:16:35,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 02:16:35,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,134 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:16:35,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:16:35,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:16:35,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:16:35,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:16:35,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:16:35,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:16:35,541 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:16:35,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:16:35,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:16:35,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,678 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:16:35,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:16:35,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:16:35,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:16:35,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:16:35,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2022-11-03 02:16:35,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:16:35,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:16:35,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:16:35,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 02:16:35,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:16:35,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 02:16:35,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:35,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:16:36,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:16:36,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:16:36,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:16:36,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:36,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:16:36,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:36,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 02:16:36,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:36,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 02:16:36,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:36,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 02:16:36,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:36,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:16:36,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:36,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:16:36,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:36,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:36,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:16:36,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:36,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:16:36,836 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-03 02:16:37,586 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 164 for LOIs [2022-11-03 02:16:37,631 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 02:16:37,662 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:16:37,723 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:16:41,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2128430723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:16:41,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:16:41,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6] total 24 [2022-11-03 02:16:41,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036313822] [2022-11-03 02:16:41,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:16:41,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:16:41,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:41,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:16:41,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-11-03 02:16:41,934 INFO L87 Difference]: Start difference. First operand 181 states and 246 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) [2022-11-03 02:16:43,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:43,465 INFO L93 Difference]: Finished difference Result 235 states and 318 transitions. [2022-11-03 02:16:43,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 02:16:43,466 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 [2022-11-03 02:16:43,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:43,468 INFO L225 Difference]: With dead ends: 235 [2022-11-03 02:16:43,468 INFO L226 Difference]: Without dead ends: 181 [2022-11-03 02:16:43,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:16:43,469 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 11 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:43,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 222 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 357 Invalid, 0 Unknown, 91 Unchecked, 0.7s Time] [2022-11-03 02:16:43,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-03 02:16:43,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-11-03 02:16:43,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 121 states have internal predecessors, (135), 46 states have call successors, (46), 15 states have call predecessors, (46), 20 states have return successors, (64), 44 states have call predecessors, (64), 45 states have call successors, (64) [2022-11-03 02:16:43,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 245 transitions. [2022-11-03 02:16:43,582 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 245 transitions. Word has length 60 [2022-11-03 02:16:43,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:43,582 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 245 transitions. [2022-11-03 02:16:43,583 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) [2022-11-03 02:16:43,583 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 245 transitions. [2022-11-03 02:16:43,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:16:43,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:43,584 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] [2022-11-03 02:16:43,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:43,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:43,806 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:43,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:43,807 INFO L85 PathProgramCache]: Analyzing trace with hash -894820411, now seen corresponding path program 1 times [2022-11-03 02:16:43,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:43,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228590423] [2022-11-03 02:16:43,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:43,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:16:44,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:44,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228590423] [2022-11-03 02:16:44,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228590423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:16:44,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563760192] [2022-11-03 02:16:44,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:44,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:44,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:44,061 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:16:44,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:16:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:44,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 02:16:44,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:16:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:16:44,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:16:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:16:44,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563760192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:16:44,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [543724444] [2022-11-03 02:16:44,708 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:16:44,708 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:16:44,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:16:44,709 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:16:44,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:16:44,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:44,777 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 02:16:44,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 02:16:44,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:44,852 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:16:44,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:16:45,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:16:45,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:16:45,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:16:45,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:16:45,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,333 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:16:45,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:16:45,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2022-11-03 02:16:45,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:16:45,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:16:45,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:16:45,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:16:45,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:16:45,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:16:45,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:16:45,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:16:45,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:45,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:16:45,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:16:46,336 INFO L356 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-03 02:16:46,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 698 treesize of output 707 [2022-11-03 02:16:46,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:16:46,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:16:46,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:46,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:16:46,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:16:46,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:46,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:46,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:46,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:16:46,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:16:46,863 INFO L356 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-11-03 02:16:46,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 724 treesize of output 727 [2022-11-03 02:16:47,157 INFO L356 Elim1Store]: treesize reduction 182, result has 18.0 percent of original size [2022-11-03 02:16:47,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 679 treesize of output 691 [2022-11-03 02:16:47,521 INFO L356 Elim1Store]: treesize reduction 246, result has 16.3 percent of original size [2022-11-03 02:16:47,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 682 treesize of output 701 [2022-11-03 02:16:47,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:16:47,603 INFO L356 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-03 02:16:47,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 714 treesize of output 667 [2022-11-03 02:16:47,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:47,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:47,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 688 treesize of output 667 [2022-11-03 02:16:48,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:48,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:16:48,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:16:48,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:48,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:16:48,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:48,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 02:16:48,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:48,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:16:48,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:48,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:16:48,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:16:48,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:16:49,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:49,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:16:49,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:49,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:16:49,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:49,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:49,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:16:49,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:16:49,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:16:50,606 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-03 02:16:50,627 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 02:16:51,460 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:16:51,462 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 02:16:51,480 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:16:51,540 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:16:58,757 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8385#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_135| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_135| Int)) (and (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_135|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_135| 24)) 0) (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_135| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_135|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_135| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_135|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_135| 24)))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_135|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_135| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_135|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_135| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_135|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_135|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_135|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_135| 0) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_135|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_135| 24))))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:16:58,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:16:58,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:16:58,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 6] total 16 [2022-11-03 02:16:58,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567892430] [2022-11-03 02:16:58,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:16:58,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:16:58,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:16:58,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:16:58,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 02:16:58,759 INFO L87 Difference]: Start difference. First operand 181 states and 245 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) [2022-11-03 02:16:59,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:16:59,174 INFO L93 Difference]: Finished difference Result 274 states and 396 transitions. [2022-11-03 02:16:59,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:16:59,175 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 [2022-11-03 02:16:59,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:16:59,177 INFO L225 Difference]: With dead ends: 274 [2022-11-03 02:16:59,177 INFO L226 Difference]: Without dead ends: 196 [2022-11-03 02:16:59,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=173, Invalid=1897, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 02:16:59,179 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 9 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:16:59,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 501 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:16:59,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-03 02:16:59,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 184. [2022-11-03 02:16:59,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 116 states have (on average 1.1724137931034482) internal successors, (136), 124 states have internal predecessors, (136), 46 states have call successors, (46), 15 states have call predecessors, (46), 21 states have return successors, (71), 44 states have call predecessors, (71), 45 states have call successors, (71) [2022-11-03 02:16:59,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 253 transitions. [2022-11-03 02:16:59,294 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 253 transitions. Word has length 63 [2022-11-03 02:16:59,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:16:59,294 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 253 transitions. [2022-11-03 02:16:59,294 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) [2022-11-03 02:16:59,294 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 253 transitions. [2022-11-03 02:16:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 02:16:59,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:16:59,296 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] [2022-11-03 02:16:59,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:16:59,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:16:59,510 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:16:59,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:16:59,511 INFO L85 PathProgramCache]: Analyzing trace with hash 292884767, now seen corresponding path program 1 times [2022-11-03 02:16:59,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:16:59,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882031654] [2022-11-03 02:16:59,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:59,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:16:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:16:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 02:16:59,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:16:59,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882031654] [2022-11-03 02:16:59,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882031654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:16:59,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231056728] [2022-11-03 02:16:59,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:16:59,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:16:59,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:16:59,810 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:16:59,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 02:17:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:00,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-03 02:17:00,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:01,720 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_59| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_59| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_59|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_59|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_59| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_59| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_59|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_59|) 0)))) is different from true [2022-11-03 02:17:02,432 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:17:02,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:17:02,438 INFO L356 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-03 02:17:02,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:17:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2022-11-03 02:17:02,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:03,003 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-03 02:17:03,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:17:03,013 INFO L356 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-03 02:17:03,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2022-11-03 02:17:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:17:03,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231056728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:03,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2057818123] [2022-11-03 02:17:03,048 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:17:03,048 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:17:03,049 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:17:03,049 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:17:03,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:17:03,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,129 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:17:03,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:17:03,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 02:17:03,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:17:03,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:17:03,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:17:03,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:17:03,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,615 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:17:03,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:17:03,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 23 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 54 [2022-11-03 02:17:03,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:17:03,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:17:03,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:17:03,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:03,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:17:03,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:03,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:03,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:03,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:03,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:03,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:03,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:04,428 INFO L356 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-03 02:17:04,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 694 treesize of output 703 [2022-11-03 02:17:04,765 INFO L356 Elim1Store]: treesize reduction 182, result has 18.0 percent of original size [2022-11-03 02:17:04,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 673 treesize of output 685 [2022-11-03 02:17:04,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:04,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:04,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:04,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:04,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:04,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:04,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:04,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:04,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:05,208 INFO L356 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-03 02:17:05,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 706 treesize of output 715 [2022-11-03 02:17:05,552 INFO L356 Elim1Store]: treesize reduction 246, result has 16.3 percent of original size [2022-11-03 02:17:05,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 678 treesize of output 697 [2022-11-03 02:17:05,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:05,622 INFO L356 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-03 02:17:05,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 710 treesize of output 663 [2022-11-03 02:17:05,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:05,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:05,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 684 treesize of output 663 [2022-11-03 02:17:07,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:07,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:17:07,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:07,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:17:07,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:07,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 02:17:07,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:07,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:07,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 02:17:07,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:07,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:17:07,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:17:07,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:17:07,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:07,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:07,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:17:07,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:07,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:17:07,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:07,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:17:07,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:07,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:17:09,117 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-03 02:17:09,138 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 02:17:09,956 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:17:09,958 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 02:17:09,976 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:17:10,035 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:17:18,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9514#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (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_157| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_157| Int)) (and (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_157| 0) (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_157| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_157|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_157| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_157|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_157| 24)))) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_157|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_157| 24)) 0) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_157|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_157| 24))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_157|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_157|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_157| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_157|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_157| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_157|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_157|))) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:17:18,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:17:18,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:17:18,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 17, 14] total 30 [2022-11-03 02:17:18,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427329104] [2022-11-03 02:17:18,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:17:18,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 02:17:18,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:17:18,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 02:17:18,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2833, Unknown=1, NotChecked=108, Total=3192 [2022-11-03 02:17:18,291 INFO L87 Difference]: Start difference. First operand 184 states and 253 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) [2022-11-03 02:17:20,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:20,240 INFO L93 Difference]: Finished difference Result 338 states and 488 transitions. [2022-11-03 02:17:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-03 02:17:20,241 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 [2022-11-03 02:17:20,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:20,242 INFO L225 Difference]: With dead ends: 338 [2022-11-03 02:17:20,243 INFO L226 Difference]: Without dead ends: 237 [2022-11-03 02:17:20,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 145 SyntacticMatches, 8 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2171 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=497, Invalid=6478, Unknown=1, NotChecked=164, Total=7140 [2022-11-03 02:17:20,246 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 112 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:20,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 561 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 700 Invalid, 0 Unknown, 268 Unchecked, 0.6s Time] [2022-11-03 02:17:20,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-03 02:17:20,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 207. [2022-11-03 02:17:20,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 133 states have (on average 1.1729323308270676) internal successors, (156), 140 states have internal predecessors, (156), 49 states have call successors, (49), 19 states have call predecessors, (49), 24 states have return successors, (66), 47 states have call predecessors, (66), 48 states have call successors, (66) [2022-11-03 02:17:20,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 271 transitions. [2022-11-03 02:17:20,389 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 271 transitions. Word has length 65 [2022-11-03 02:17:20,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:20,390 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 271 transitions. [2022-11-03 02:17:20,390 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) [2022-11-03 02:17:20,391 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 271 transitions. [2022-11-03 02:17:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-03 02:17:20,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:20,392 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, 1] [2022-11-03 02:17:20,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:17:20,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:17:20,614 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:20,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:20,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1298768452, now seen corresponding path program 1 times [2022-11-03 02:17:20,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:20,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400427876] [2022-11-03 02:17:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:20,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:17:22,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:17:22,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400427876] [2022-11-03 02:17:22,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400427876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:17:22,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720698221] [2022-11-03 02:17:22,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:22,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:17:22,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:17:22,037 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:17:22,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 02:17:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:22,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 02:17:22,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:22,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-03 02:17:22,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:22,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 02:17:22,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:22,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:22,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 21 [2022-11-03 02:17:22,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:22,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-11-03 02:17:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:17:22,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:23,281 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1614 (Array Int Int)) (v_ArrVal_1615 Int) (v_ArrVal_1616 (Array Int Int))) (not (= (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 16) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1616) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1614) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_1615)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)))) is different from false [2022-11-03 02:17:23,306 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:17:23,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-11-03 02:17:23,329 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:17:23,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 267 treesize of output 277 [2022-11-03 02:17:23,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 298 [2022-11-03 02:17:23,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 294 [2022-11-03 02:17:23,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 02:17:23,473 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:17:23,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 39 [2022-11-03 02:17:23,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-03 02:17:23,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 51 [2022-11-03 02:17:23,514 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:17:23,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 77 treesize of output 77 [2022-11-03 02:17:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 28 trivial. 1 not checked. [2022-11-03 02:17:23,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720698221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:17:23,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1857514656] [2022-11-03 02:17:23,733 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:17:23,734 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:17:23,734 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:17:23,734 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:17:23,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:17:23,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:23,815 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 02:17:23,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 02:17:23,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:23,898 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:17:23,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:17:24,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:17:24,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:17:24,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:17:24,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:17:24,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:24,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:24,353 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:17:24,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:17:24,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:24,405 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:17:24,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:17:24,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,522 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 02:17:24,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 74 [2022-11-03 02:17:24,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:17:24,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:17:24,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,713 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:17:24,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:17:24,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:17:24,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:17:24,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-03 02:17:24,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:24,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 02:17:24,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:17:24,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:17:24,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:17:24,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:17:24,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-03 02:17:24,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:17:24,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:24,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:17:24,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:17:25,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:17:25,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:25,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:17:25,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:25,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:25,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:17:25,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:25,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:17:25,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:25,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:17:26,298 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2022-11-03 02:17:26,308 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 59 for LOIs [2022-11-03 02:17:27,514 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:17:27,516 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 02:17:27,533 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:17:27,592 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:17:34,878 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10846#(and (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:17:34,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:17:34,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:17:34,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 32 [2022-11-03 02:17:34,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281011668] [2022-11-03 02:17:34,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:17:34,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 02:17:34,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:17:34,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 02:17:34,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=3077, Unknown=1, NotChecked=112, Total=3422 [2022-11-03 02:17:34,881 INFO L87 Difference]: Start difference. First operand 207 states and 271 transitions. Second operand has 32 states, 29 states have (on average 2.896551724137931) internal successors, (84), 32 states have internal predecessors, (84), 12 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) [2022-11-03 02:17:36,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:17:36,285 INFO L93 Difference]: Finished difference Result 290 states and 371 transitions. [2022-11-03 02:17:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:17:36,285 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.896551724137931) internal successors, (84), 32 states have internal predecessors, (84), 12 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) Word has length 68 [2022-11-03 02:17:36,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:17:36,287 INFO L225 Difference]: With dead ends: 290 [2022-11-03 02:17:36,287 INFO L226 Difference]: Without dead ends: 221 [2022-11-03 02:17:36,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 161 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=328, Invalid=4097, Unknown=1, NotChecked=130, Total=4556 [2022-11-03 02:17:36,290 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 148 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:17:36,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 591 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 819 Invalid, 0 Unknown, 188 Unchecked, 0.9s Time] [2022-11-03 02:17:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-03 02:17:36,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 195. [2022-11-03 02:17:36,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 129 states have (on average 1.1705426356589148) internal successors, (151), 136 states have internal predecessors, (151), 41 states have call successors, (41), 19 states have call predecessors, (41), 24 states have return successors, (58), 39 states have call predecessors, (58), 40 states have call successors, (58) [2022-11-03 02:17:36,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 250 transitions. [2022-11-03 02:17:36,403 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 250 transitions. Word has length 68 [2022-11-03 02:17:36,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:17:36,403 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 250 transitions. [2022-11-03 02:17:36,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.896551724137931) internal successors, (84), 32 states have internal predecessors, (84), 12 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) [2022-11-03 02:17:36,404 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 250 transitions. [2022-11-03 02:17:36,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:17:36,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:17:36,405 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] [2022-11-03 02:17:36,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-03 02:17:36,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:17:36,630 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:17:36,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:17:36,631 INFO L85 PathProgramCache]: Analyzing trace with hash 418573970, now seen corresponding path program 1 times [2022-11-03 02:17:36,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:17:36,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316066978] [2022-11-03 02:17:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:36,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:17:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:17:38,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:17:38,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316066978] [2022-11-03 02:17:38,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316066978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:17:38,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951946010] [2022-11-03 02:17:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:17:38,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:17:38,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:17:38,997 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:17:39,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:17:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:17:39,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 127 conjunts are in the unsatisfiable core [2022-11-03 02:17:39,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:17:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:17:43,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:17:50,786 INFO L356 Elim1Store]: treesize reduction 17, result has 80.5 percent of original size [2022-11-03 02:17:50,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:17:51,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951946010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:17:51,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1359385442] [2022-11-03 02:17:51,626 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:17:51,626 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:17:51,626 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:17:51,627 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:17:51,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:17:51,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:51,720 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:17:51,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:17:51,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:51,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 02:17:52,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:17:52,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:17:52,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:17:52,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:17:52,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:17:52,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 02:17:52,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:17:52,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:17:52,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:18:02,218 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 150 for LOIs [2022-11-03 02:18:02,517 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 17 for LOIs [2022-11-03 02:18:03,122 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 143 for LOIs [2022-11-03 02:18:03,163 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 02:18:03,180 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:18:03,240 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:18:24,634 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11940#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19|) 16) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19|) 16) 0) (not (= |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19| 4)) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19|)) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19|)) (not (= |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19| 0)) (<= 0 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19|) (= |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19|) 0)) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19|) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19|) 24) |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19|) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19|) 24) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19|) 8) 0) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_19|) 0) 16))) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$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) (= 5 |~#s_can_fail_allocator_static~0.base|) (= 30 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:18:24,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:18:24,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:18:24,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 29] total 41 [2022-11-03 02:18:24,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914119191] [2022-11-03 02:18:24,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:18:24,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 02:18:24,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:24,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 02:18:24,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=5719, Unknown=0, NotChecked=0, Total=6162 [2022-11-03 02:18:24,638 INFO L87 Difference]: Start difference. First operand 195 states and 250 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) [2022-11-03 02:18:28,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:28,359 INFO L93 Difference]: Finished difference Result 316 states and 405 transitions. [2022-11-03 02:18:28,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-03 02:18:28,360 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 [2022-11-03 02:18:28,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:28,362 INFO L225 Difference]: With dead ends: 316 [2022-11-03 02:18:28,362 INFO L226 Difference]: Without dead ends: 278 [2022-11-03 02:18:28,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3374 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=831, Invalid=10511, Unknown=0, NotChecked=0, Total=11342 [2022-11-03 02:18:28,365 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 107 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 679 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:18:28,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1152 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1145 Invalid, 0 Unknown, 679 Unchecked, 1.0s Time] [2022-11-03 02:18:28,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-03 02:18:28,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 245. [2022-11-03 02:18:28,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 166 states have (on average 1.1626506024096386) internal successors, (193), 176 states have internal predecessors, (193), 46 states have call successors, (46), 24 states have call predecessors, (46), 32 states have return successors, (68), 44 states have call predecessors, (68), 45 states have call successors, (68) [2022-11-03 02:18:28,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 307 transitions. [2022-11-03 02:18:28,493 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 307 transitions. Word has length 67 [2022-11-03 02:18:28,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:28,493 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 307 transitions. [2022-11-03 02:18:28,493 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) [2022-11-03 02:18:28,494 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 307 transitions. [2022-11-03 02:18:28,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:18:28,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:28,495 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] [2022-11-03 02:18:28,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:18:28,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:18:28,707 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:28,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:28,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1289991631, now seen corresponding path program 1 times [2022-11-03 02:18:28,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:28,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875384764] [2022-11-03 02:18:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:28,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-03 02:18:28,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:28,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875384764] [2022-11-03 02:18:28,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875384764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:18:28,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:18:28,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:18:28,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704856563] [2022-11-03 02:18:28,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:18:28,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:18:28,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:18:28,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:18:28,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:18:28,935 INFO L87 Difference]: Start difference. First operand 245 states and 307 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) [2022-11-03 02:18:29,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:18:29,232 INFO L93 Difference]: Finished difference Result 263 states and 326 transitions. [2022-11-03 02:18:29,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:18:29,233 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 [2022-11-03 02:18:29,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:18:29,235 INFO L225 Difference]: With dead ends: 263 [2022-11-03 02:18:29,235 INFO L226 Difference]: Without dead ends: 261 [2022-11-03 02:18:29,235 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 [2022-11-03 02:18:29,236 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 281 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 [2022-11-03 02:18:29,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 281 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:18:29,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-03 02:18:29,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 255. [2022-11-03 02:18:29,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 172 states have (on average 1.1569767441860466) internal successors, (199), 183 states have internal predecessors, (199), 48 states have call successors, (48), 25 states have call predecessors, (48), 34 states have return successors, (71), 46 states have call predecessors, (71), 47 states have call successors, (71) [2022-11-03 02:18:29,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 318 transitions. [2022-11-03 02:18:29,387 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 318 transitions. Word has length 70 [2022-11-03 02:18:29,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:18:29,388 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 318 transitions. [2022-11-03 02:18:29,388 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) [2022-11-03 02:18:29,388 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 318 transitions. [2022-11-03 02:18:29,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-03 02:18:29,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:18:29,390 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] [2022-11-03 02:18:29,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-03 02:18:29,390 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:18:29,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:18:29,391 INFO L85 PathProgramCache]: Analyzing trace with hash 232789991, now seen corresponding path program 1 times [2022-11-03 02:18:29,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:18:29,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985351503] [2022-11-03 02:18:29,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:29,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:18:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 43 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:18:33,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:18:33,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985351503] [2022-11-03 02:18:33,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985351503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:18:33,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711896298] [2022-11-03 02:18:33,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:18:33,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:18:33,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:18:33,590 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:18:33,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 02:18:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:18:34,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-03 02:18:34,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:18:34,141 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-03 02:18:34,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2022-11-03 02:18:34,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 02:18:34,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-03 02:18:34,198 INFO L356 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-03 02:18:34,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 36 [2022-11-03 02:18:34,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:18:34,319 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_258| Int)) (and (= |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_258| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_258|) 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_258|))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_258| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_258|) 24))) (and (exists ((v_DerPreprocessor_93 (Array Int Int)) (v_DerPreprocessor_94 (Array Int Int))) (and (= (select v_DerPreprocessor_94 24) .cse0) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_93) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_258| v_DerPreprocessor_94) .cse0 v_DerPreprocessor_93) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_258| v_DerPreprocessor_94) .cse0)))) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_258|) (not (= .cse0 0)))))) is different from true [2022-11-03 02:19:02,169 WARN L234 SmtUtils]: Spent 20.19s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:19:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 14 trivial. 2 not checked. [2022-11-03 02:19:26,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:19:31,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711896298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:31,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [233692101] [2022-11-03 02:19:31,270 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:19:31,271 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:19:31,271 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:19:31,271 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:19:31,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:19:31,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,344 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 02:19:31,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 02:19:31,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,417 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:19:31,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:19:31,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:19:31,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:19:31,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:19:31,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:19:31,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,822 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 02:19:31,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 74 [2022-11-03 02:19:31,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:19:31,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:19:31,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:31,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:31,940 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:19:31,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:19:31,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:31,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:32,006 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:19:32,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:19:32,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:32,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:32,134 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:19:32,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:19:32,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:19:32,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:32,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:32,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:19:32,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:32,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 02:19:32,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:32,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 02:19:32,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:32,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-03 02:19:32,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:19:32,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:32,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:32,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:19:32,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:32,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 02:19:32,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:32,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 02:19:32,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:32,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 02:19:32,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:19:32,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:19:32,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:32,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:19:32,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:32,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:19:32,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:32,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:19:32,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:32,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:32,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:19:33,961 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-03 02:19:33,982 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 02:19:34,662 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:19:34,664 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 02:19:34,681 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:19:34,744 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:19:56,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14079#(and (<= 0 |__VERIFIER_assert_#in~cond|) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_229| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_229| Int)) (and (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_229| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_229|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_229| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_229|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_229| 24)))) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_229|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_229| 24))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_229|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_229| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_229|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_229| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_229|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_229|) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_229|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_229| 24)) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_229|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_229| 0))) (= (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) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:19:56,645 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:19:56,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:19:56,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 8] total 41 [2022-11-03 02:19:56,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464543777] [2022-11-03 02:19:56,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:56,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 02:19:56,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:56,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 02:19:56,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=4060, Unknown=69, NotChecked=130, Total=4556 [2022-11-03 02:19:56,648 INFO L87 Difference]: Start difference. First operand 255 states and 318 transitions. Second operand has 41 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 34 states have internal predecessors, (97), 20 states have call successors, (29), 8 states have call predecessors, (29), 11 states have return successors, (28), 18 states have call predecessors, (28), 19 states have call successors, (28) [2022-11-03 02:20:03,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:03,553 INFO L93 Difference]: Finished difference Result 371 states and 455 transitions. [2022-11-03 02:20:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-03 02:20:03,554 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 34 states have internal predecessors, (97), 20 states have call successors, (29), 8 states have call predecessors, (29), 11 states have return successors, (28), 18 states have call predecessors, (28), 19 states have call successors, (28) Word has length 72 [2022-11-03 02:20:03,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:03,555 INFO L225 Difference]: With dead ends: 371 [2022-11-03 02:20:03,555 INFO L226 Difference]: Without dead ends: 296 [2022-11-03 02:20:03,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 162 SyntacticMatches, 9 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 69.4s TimeCoverageRelationStatistics Valid=449, Invalid=6273, Unknown=88, NotChecked=162, Total=6972 [2022-11-03 02:20:03,557 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 46 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:03,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 563 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 160 Invalid, 0 Unknown, 262 Unchecked, 0.2s Time] [2022-11-03 02:20:03,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-03 02:20:03,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 260. [2022-11-03 02:20:03,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 180 states have (on average 1.1666666666666667) internal successors, (210), 190 states have internal predecessors, (210), 43 states have call successors, (43), 28 states have call predecessors, (43), 36 states have return successors, (57), 41 states have call predecessors, (57), 42 states have call successors, (57) [2022-11-03 02:20:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 310 transitions. [2022-11-03 02:20:03,725 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 310 transitions. Word has length 72 [2022-11-03 02:20:03,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:03,726 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 310 transitions. [2022-11-03 02:20:03,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 34 states have internal predecessors, (97), 20 states have call successors, (29), 8 states have call predecessors, (29), 11 states have return successors, (28), 18 states have call predecessors, (28), 19 states have call successors, (28) [2022-11-03 02:20:03,726 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 310 transitions. [2022-11-03 02:20:03,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-03 02:20:03,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:03,728 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] [2022-11-03 02:20:03,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:03,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:03,954 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:03,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:03,955 INFO L85 PathProgramCache]: Analyzing trace with hash -358000847, now seen corresponding path program 2 times [2022-11-03 02:20:03,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:20:03,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189702963] [2022-11-03 02:20:03,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:03,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:20:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:20:05,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:20:05,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189702963] [2022-11-03 02:20:05,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189702963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:20:05,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322823852] [2022-11-03 02:20:05,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:20:05,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:05,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:20:05,623 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:20:05,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 02:20:06,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:20:06,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:20:06,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-03 02:20:06,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:31,040 WARN L234 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:20:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 57 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:20:31,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:31,996 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:20:31,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2022-11-03 02:20:32,010 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:20:32,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-03 02:20:32,121 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:20:32,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322823852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:32,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [830229770] [2022-11-03 02:20:32,123 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:20:32,123 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:20:32,123 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:20:32,124 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:20:32,124 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:20:32,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,213 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:20:32,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:20:32,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 02:20:32,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:20:32,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:20:32,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:20:32,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:20:32,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 02:20:32,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:20:32,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:20:32,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:32,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:20:42,332 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 150 for LOIs [2022-11-03 02:20:42,560 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 02:20:43,227 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 143 for LOIs [2022-11-03 02:20:43,268 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 02:20:43,286 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:20:43,347 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:21:03,025 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15526#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (<= 5 |~#s_can_fail_allocator_static~0.base|) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (= (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (<= 0 |#NULL.offset|) (= 30 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|) 24) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|) 8) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|) 24) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|) (= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|) 16)) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|) 8) 0) (not (= |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298| 4)) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|) 0) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|) 16) 0) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|)) (<= 0 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|)) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|) 1) (not (= |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298| 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|) 0) 16) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|)))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:21:03,025 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:21:03,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:21:03,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 13] total 36 [2022-11-03 02:21:03,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65699250] [2022-11-03 02:21:03,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:03,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:21:03,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:03,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:21:03,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=3631, Unknown=7, NotChecked=0, Total=4032 [2022-11-03 02:21:03,027 INFO L87 Difference]: Start difference. First operand 260 states and 310 transitions. Second operand has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 35 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) [2022-11-03 02:21:19,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:21:19,493 INFO L93 Difference]: Finished difference Result 525 states and 643 transitions. [2022-11-03 02:21:19,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:21:19,494 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 35 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 [2022-11-03 02:21:19,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:21:19,495 INFO L225 Difference]: With dead ends: 525 [2022-11-03 02:21:19,495 INFO L226 Difference]: Without dead ends: 342 [2022-11-03 02:21:19,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 183 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2283 ImplicationChecksByTransitivity, 59.9s TimeCoverageRelationStatistics Valid=675, Invalid=6283, Unknown=14, NotChecked=0, Total=6972 [2022-11-03 02:21:19,498 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 184 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:21:19,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 970 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1301 Invalid, 0 Unknown, 372 Unchecked, 1.3s Time] [2022-11-03 02:21:19,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-11-03 02:21:19,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 248. [2022-11-03 02:21:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 170 states have (on average 1.1529411764705881) internal successors, (196), 179 states have internal predecessors, (196), 42 states have call successors, (42), 30 states have call predecessors, (42), 35 states have return successors, (48), 38 states have call predecessors, (48), 41 states have call successors, (48) [2022-11-03 02:21:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 286 transitions. [2022-11-03 02:21:19,659 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 286 transitions. Word has length 73 [2022-11-03 02:21:19,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:21:19,659 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 286 transitions. [2022-11-03 02:21:19,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 35 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) [2022-11-03 02:21:19,660 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 286 transitions. [2022-11-03 02:21:19,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 02:21:19,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:21:19,661 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] [2022-11-03 02:21:19,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:21:19,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-03 02:21:19,874 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:21:19,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:21:19,875 INFO L85 PathProgramCache]: Analyzing trace with hash 683217571, now seen corresponding path program 2 times [2022-11-03 02:21:19,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:21:19,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670508588] [2022-11-03 02:21:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:21:19,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:21:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:21:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:21:21,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:21:21,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670508588] [2022-11-03 02:21:21,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670508588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:21:21,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590006515] [2022-11-03 02:21:21,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:21:21,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:21:21,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:21:21,239 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:21:21,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 02:21:21,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:21:21,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:21:21,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 123 conjunts are in the unsatisfiable core [2022-11-03 02:21:21,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:21:21,741 INFO L356 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2022-11-03 02:21:21,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 32 [2022-11-03 02:21:21,929 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-03 02:21:21,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2022-11-03 02:21:21,968 INFO L356 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-03 02:21:21,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2022-11-03 02:21:21,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 02:21:21,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-03 02:21:22,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-03 02:21:22,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-03 02:21:22,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 25 [2022-11-03 02:21:22,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:21:22,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 25 [2022-11-03 02:21:22,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:21:22,258 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| Int)) (and (exists ((v_DerPreprocessor_112 (Array Int Int)) (v_DerPreprocessor_113 (Array Int Int)) (v_DerPreprocessor_110 (Array Int Int)) (v_DerPreprocessor_109 (Array Int Int))) (let ((.cse0 (select v_DerPreprocessor_113 24))) (and (= v_DerPreprocessor_112 (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_112) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| v_DerPreprocessor_113) .cse0 v_DerPreprocessor_112) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| v_DerPreprocessor_113) .cse0)) (= (select v_DerPreprocessor_110 24) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|) 24)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|) 24) .cse0) (= v_DerPreprocessor_109 (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_DerPreprocessor_109) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| v_DerPreprocessor_110) .cse0 v_DerPreprocessor_109) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| v_DerPreprocessor_110) .cse0))))) (not (= |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| 4)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| Int)) (and (not (= |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|) 24))) (not (= |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| 4)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)))) is different from true [2022-11-03 02:21:23,392 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309| Int)) (and (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309|)) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309|)) (exists ((v_DerPreprocessor_112 (Array Int Int)) (v_DerPreprocessor_113 (Array Int Int)) (v_DerPreprocessor_110 (Array Int Int)) (v_DerPreprocessor_109 (Array Int Int))) (let ((.cse0 (select v_DerPreprocessor_113 24))) (and (= (select v_DerPreprocessor_110 24) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309|) 24)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309|) 24) .cse0) (= v_DerPreprocessor_109 (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_DerPreprocessor_109) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309| v_DerPreprocessor_110) .cse0 v_DerPreprocessor_109) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309| v_DerPreprocessor_110) .cse0)) (= v_DerPreprocessor_112 (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_112) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309| v_DerPreprocessor_113) .cse0 v_DerPreprocessor_112) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309| v_DerPreprocessor_113) .cse0))))) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309|) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309|)) (not (= |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309| 4)))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309| Int)) (and (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309|)) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309|) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309|) 24) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309|)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309|)) (not (= |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_309| 4))))) is different from true [2022-11-03 02:21:23,841 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| Int)) (and (exists ((v_DerPreprocessor_112 (Array Int Int)) (v_DerPreprocessor_113 (Array Int Int)) (v_DerPreprocessor_110 (Array Int Int)) (v_DerPreprocessor_109 (Array Int Int))) (let ((.cse0 (select v_DerPreprocessor_113 24))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_DerPreprocessor_109) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| v_DerPreprocessor_110) .cse0 v_DerPreprocessor_109) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| v_DerPreprocessor_110) .cse0) v_DerPreprocessor_109) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_112) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| v_DerPreprocessor_113) .cse0 v_DerPreprocessor_112) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| v_DerPreprocessor_113) .cse0) v_DerPreprocessor_112) (= (select v_DerPreprocessor_110 24) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) 24)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) 24) .cse0)))) (not (= |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| 4)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| Int)) (and (not (= |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| 4)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) 24) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|))))) is different from true [2022-11-03 02:21:31,003 WARN L855 $PredicateComparison]: unable to prove that (and (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| Int)) (and (exists ((v_DerPreprocessor_112 (Array Int Int)) (v_DerPreprocessor_113 (Array Int Int)) (v_DerPreprocessor_110 (Array Int Int)) (v_DerPreprocessor_109 (Array Int Int))) (let ((.cse0 (select v_DerPreprocessor_113 24))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_DerPreprocessor_109) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| v_DerPreprocessor_110) .cse0 v_DerPreprocessor_109) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| v_DerPreprocessor_110) .cse0) v_DerPreprocessor_109) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_112) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| v_DerPreprocessor_113) .cse0 v_DerPreprocessor_112) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| v_DerPreprocessor_113) .cse0) v_DerPreprocessor_112) (= (select v_DerPreprocessor_110 24) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) 24)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) 24) .cse0)))) (not (= |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| 4)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| Int)) (and (not (= |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| 4)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) 24) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|))))) (let ((.cse3 (= |c_aws_linked_list_node_next_is_valid_#res| 0)) (.cse2 (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| 0)) (.cse1 (= 0 |c_aws_linked_list_node_next_is_valid_#in~node.base|))) (or (and .cse1 .cse2 .cse3) (and (let ((.cse8 (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)) (.cse10 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|))) (let ((.cse4 (= .cse10 0)) (.cse5 (= .cse8 0))) (or (and .cse4 .cse5 .cse3) (and (or (not .cse4) (not .cse5)) (let ((.cse9 (+ 8 .cse10))) (let ((.cse6 (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| (select (select |c_#memory_$Pointer$.offset| .cse8) .cse9))) (.cse7 (= (select (select |c_#memory_$Pointer$.base| .cse8) .cse9) |c_aws_linked_list_node_next_is_valid_#in~node.base|))) (or (and .cse6 .cse7 (= |c_aws_linked_list_node_next_is_valid_#res| 1)) (and (or (not .cse6) (not .cse7)) .cse3)))))))) (or (not .cse2) (not .cse1)))))) is different from true [2022-11-03 02:21:35,945 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse3 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_is_valid_#in~list#1.base|) |c_aws_linked_list_is_valid_#in~list#1.offset|))) (let ((.cse2 (+ .cse3 8)) (.cse1 (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_is_valid_#in~list#1.base|) |c_aws_linked_list_is_valid_#in~list#1.offset|))) (and (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| Int)) (and (exists ((v_DerPreprocessor_112 (Array Int Int)) (v_DerPreprocessor_113 (Array Int Int)) (v_DerPreprocessor_110 (Array Int Int)) (v_DerPreprocessor_109 (Array Int Int))) (let ((.cse0 (select v_DerPreprocessor_113 24))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_DerPreprocessor_109) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| v_DerPreprocessor_110) .cse0 v_DerPreprocessor_109) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| v_DerPreprocessor_110) .cse0) v_DerPreprocessor_109) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_112) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| v_DerPreprocessor_113) .cse0 v_DerPreprocessor_112) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| v_DerPreprocessor_113) .cse0) v_DerPreprocessor_112) (= (select v_DerPreprocessor_110 24) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) 24)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) 24) .cse0)))) (not (= |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| 4)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| Int)) (and (not (= |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| 4)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) 24) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|))))) (= |c_aws_linked_list_is_valid_#in~list#1.offset| (select (select |c_#memory_$Pointer$.offset| .cse1) .cse2)) (= .cse1 |c_aws_linked_list_is_valid_#in~list#1.base|) (= |c_aws_linked_list_is_valid_#in~list#1.base| (select (select |c_#memory_$Pointer$.base| .cse1) .cse2)) (= .cse3 (+ 16 |c_aws_linked_list_is_valid_#in~list#1.offset|)) (or (not (= |c_aws_linked_list_is_valid_#in~list#1.offset| 0)) (not (= |c_aws_linked_list_is_valid_#in~list#1.base| 0))) (or (not (= .cse1 0)) (not (= .cse3 0)))))) is different from true [2022-11-03 02:21:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 8 refuted. 2 times theorem prover too weak. 11 trivial. 55 not checked. [2022-11-03 02:21:39,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:24,258 WARN L234 SmtUtils]: Spent 26.23s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:22:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 41 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-03 02:22:25,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590006515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:25,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [904441338] [2022-11-03 02:22:25,808 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:22:25,808 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:22:25,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:22:25,808 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:22:25,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:22:25,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:25,989 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 02:22:25,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 02:22:26,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,175 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:22:26,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:22:26,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:22:26,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:22:26,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:22:26,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:22:26,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,764 INFO L356 Elim1Store]: treesize reduction 50, result has 47.9 percent of original size [2022-11-03 02:22:26,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 18 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 74 [2022-11-03 02:22:26,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:22:26,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:22:26,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:26,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:26,947 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:22:26,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:22:26,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:26,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:27,066 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 02:22:27,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-03 02:22:27,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,390 INFO L356 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-03 02:22:27,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2022-11-03 02:22:27,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:22:27,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:27,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:22:27,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 02:22:27,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 02:22:27,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 02:22:27,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:22:27,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 02:22:27,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:22:27,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:27,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:22:27,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 02:22:27,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-03 02:22:27,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-03 02:22:27,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-03 02:22:27,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-03 02:22:27,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:22:27,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:27,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:22:29,065 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2022-11-03 02:22:29,080 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 58 for LOIs [2022-11-03 02:22:30,185 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-03 02:22:30,188 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 02:22:30,206 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:22:30,267 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:22:49,838 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17218#(and (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:22:49,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:22:49,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:22:49,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 24, 16] total 50 [2022-11-03 02:22:49,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888641002] [2022-11-03 02:22:49,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:22:49,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 02:22:49,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:49,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 02:22:49,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=4684, Unknown=142, NotChecked=720, Total=5852 [2022-11-03 02:22:49,842 INFO L87 Difference]: Start difference. First operand 248 states and 286 transitions. Second operand has 50 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 44 states have internal predecessors, (107), 17 states have call successors, (30), 7 states have call predecessors, (30), 13 states have return successors, (29), 14 states have call predecessors, (29), 17 states have call successors, (29) [2022-11-03 02:23:05,753 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c_aws_linked_list_is_valid_#in~list#1.offset| (+ |c_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~list#1.offset| 16))) (= |c_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset| |c_aws_linked_list_is_valid_#in~list#1.offset|) (= |c_aws_linked_list_is_valid_#in~list#1.base| |c_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base|) (or (let ((.cse1 (+ 16 |c_aws_linked_list_is_valid_#in~list#1.offset|)) (.cse0 (select |c_#memory_$Pointer$.base| |c_aws_linked_list_is_valid_#in~list#1.base|)) (.cse5 (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_is_valid_#in~list#1.base|))) (and (= (select .cse0 .cse1) 0) (let ((.cse4 (select .cse5 |c_aws_linked_list_is_valid_#in~list#1.offset|))) (let ((.cse3 (+ .cse4 8)) (.cse2 (select .cse0 |c_aws_linked_list_is_valid_#in~list#1.offset|))) (or (not (= |c_aws_linked_list_is_valid_#in~list#1.base| (select (select |c_#memory_$Pointer$.base| .cse2) .cse3))) (and (= |c_aws_linked_list_is_valid_#in~list#1.offset| 0) (= |c_aws_linked_list_is_valid_#in~list#1.base| 0)) (not (= |c_aws_linked_list_is_valid_#in~list#1.offset| (select (select |c_#memory_$Pointer$.offset| .cse2) .cse3))) (and (= .cse2 0) (= .cse4 0))))) (= (select .cse5 .cse1) 0) (let ((.cse6 (+ |c_aws_linked_list_is_valid_#in~list#1.offset| 24))) (or (not (= (select .cse0 .cse6) 0)) (not (= (select .cse5 .cse6) 0)))))) (let ((.cse9 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base|) |c_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset|))) (let ((.cse8 (+ .cse9 8)) (.cse7 (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base|) |c_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset|))) (and (= |c_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset| (select (select |c_#memory_$Pointer$.offset| .cse7) .cse8)) (= (select (select |c_#memory_$Pointer$.base| .cse7) .cse8) |c_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base|) (or (not (= .cse7 0)) (not (= .cse9 0))) (or (not (= |c_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset| 0)) (not (= |c_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base| 0))))))) (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| Int)) (and (exists ((v_DerPreprocessor_112 (Array Int Int)) (v_DerPreprocessor_113 (Array Int Int)) (v_DerPreprocessor_110 (Array Int Int)) (v_DerPreprocessor_109 (Array Int Int))) (let ((.cse10 (select v_DerPreprocessor_113 24))) (and (= v_DerPreprocessor_112 (select (store (store (store (store |c_#memory_$Pointer$.base| .cse10 v_DerPreprocessor_112) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| v_DerPreprocessor_113) .cse10 v_DerPreprocessor_112) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| v_DerPreprocessor_113) .cse10)) (= (select v_DerPreprocessor_110 24) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|) 24)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|) 24) .cse10) (= v_DerPreprocessor_109 (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse10 v_DerPreprocessor_109) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| v_DerPreprocessor_110) .cse10 v_DerPreprocessor_109) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| v_DerPreprocessor_110) .cse10))))) (not (= |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| 4)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| Int)) (and (not (= |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|) 24))) (not (= |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| 4)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|))))) is different from true [2022-11-03 02:23:05,787 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse30 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|))) (let ((.cse28 (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)) (.cse29 (+ 8 .cse30))) (let ((.cse0 (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| (select (select |c_#memory_$Pointer$.offset| .cse28) .cse29))) (.cse5 (= 0 |c_aws_linked_list_node_next_is_valid_#in~node.base|)) (.cse4 (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| 0)) (.cse6 (mod |c_aws_linked_list_node_next_is_valid_#res| 256)) (.cse1 (= .cse30 0)) (.cse2 (= .cse28 0)) (.cse3 (= (select (select |c_#memory_$Pointer$.base| .cse28) .cse29) |c_aws_linked_list_node_next_is_valid_#in~node.base|))) (and (or (and .cse0 (or (not .cse1) (not .cse2)) .cse3 (or (not .cse4) (not .cse5))) (= .cse6 0) (and (let ((.cse7 (select |c_#memory_$Pointer$.base| 0)) (.cse8 (select |c_#memory_$Pointer$.offset| 0))) (or (not (= (select .cse7 16) 0)) (and (= (select .cse7 24) 0) (= (select .cse8 24) 0)) (not (= (select .cse8 16) 0)))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118| Int)) (let ((.cse9 (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111|)) (.cse11 (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111|)) (.cse10 (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118| 16))) (or (not (= (select .cse9 .cse10) 0)) (not (= (select .cse9 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118|) 0)) (= (select .cse11 (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118| 24)) 0) (not (= (select .cse11 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118|) 0)) (not (= (select .cse11 .cse10) 0))))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118| Int)) (let ((.cse12 (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111|)) (.cse14 (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111|)) (.cse13 (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118| 16))) (or (not (= (select .cse12 .cse13) 0)) (= (select (select |c_#memory_$Pointer$.offset| (select .cse12 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118|)) (+ 8 (select .cse14 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118|))) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118|) (= (select .cse14 (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118| 24)) 0) (not (= (select .cse14 .cse13) 0))))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118| Int)) (let ((.cse15 (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111|)) (.cse17 (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111|)) (.cse16 (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118| 16))) (or (not (= (select .cse15 .cse16) 0)) (not (= (select .cse15 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118|) 0)) (not (= (select .cse17 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118|) 0)) (= (select .cse15 (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118| 24)) 0) (not (= (select .cse17 .cse16) 0))))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118| Int)) (let ((.cse18 (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111|)) (.cse20 (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111|)) (.cse19 (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118| 16))) (or (not (= (select .cse18 .cse19) 0)) (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111| (select (select |c_#memory_$Pointer$.base| (select .cse18 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118|)) (+ 8 (select .cse20 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118|)))) (= (select .cse18 (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118| 24)) 0) (not (= (select .cse20 .cse19) 0))))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118| Int)) (let ((.cse21 (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111|)) (.cse23 (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111|)) (.cse22 (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118| 16))) (or (not (= (select .cse21 .cse22) 0)) (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111| (select (select |c_#memory_$Pointer$.base| (select .cse21 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118|)) (+ 8 (select .cse23 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118|)))) (= (select .cse23 (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118| 24)) 0) (not (= (select .cse23 .cse22) 0))))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118| Int)) (let ((.cse24 (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111|)) (.cse26 (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_111|)) (.cse25 (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118| 16))) (or (not (= (select .cse24 .cse25) 0)) (= (select (select |c_#memory_$Pointer$.offset| (select .cse24 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118|)) (+ 8 (select .cse26 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118|))) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118|) (= (select .cse24 (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_118| 24)) 0) (not (= (select .cse26 .cse25) 0))))))) (or (not .cse0) (and .cse5 .cse4) (not (<= .cse6 0)) (and .cse1 .cse2) (not .cse3)) (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| Int)) (and (exists ((v_DerPreprocessor_112 (Array Int Int)) (v_DerPreprocessor_113 (Array Int Int)) (v_DerPreprocessor_110 (Array Int Int)) (v_DerPreprocessor_109 (Array Int Int))) (let ((.cse27 (select v_DerPreprocessor_113 24))) (and (= v_DerPreprocessor_112 (select (store (store (store (store |c_#memory_$Pointer$.base| .cse27 v_DerPreprocessor_112) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| v_DerPreprocessor_113) .cse27 v_DerPreprocessor_112) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| v_DerPreprocessor_113) .cse27)) (= (select v_DerPreprocessor_110 24) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|) 24)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|) 24) .cse27) (= v_DerPreprocessor_109 (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse27 v_DerPreprocessor_109) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| v_DerPreprocessor_110) .cse27 v_DerPreprocessor_109) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| v_DerPreprocessor_110) .cse27))))) (not (= |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| 4)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| Int)) (and (not (= |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|) 24))) (not (= |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308| 4)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_308|)))))))) is different from true [2022-11-03 02:23:35,854 WARN L234 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 159 DAG size of output: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:23:40,913 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_is_valid_#in~list#1.base|))) (let ((.cse10 (select .cse1 |c_aws_linked_list_is_valid_#in~list#1.offset|)) (.cse3 (select |c_#memory_$Pointer$.base| |c_aws_linked_list_is_valid_#in~list#1.base|))) (let ((.cse9 (select .cse3 |c_aws_linked_list_is_valid_#in~list#1.offset|)) (.cse11 (+ .cse10 8))) (let ((.cse5 (= |c_aws_linked_list_is_valid_#in~list#1.offset| (select (select |c_#memory_$Pointer$.offset| .cse9) .cse11))) (.cse6 (= |c_aws_linked_list_is_valid_#in~list#1.base| (select (select |c_#memory_$Pointer$.base| .cse9) .cse11))) (.cse4 (+ 16 |c_aws_linked_list_is_valid_#in~list#1.offset|)) (.cse7 (or (not (= |c_aws_linked_list_is_valid_#in~list#1.offset| 0)) (not (= |c_aws_linked_list_is_valid_#in~list#1.base| 0)))) (.cse8 (or (not (= .cse9 0)) (not (= .cse10 0))))) (and (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| Int)) (and (exists ((v_DerPreprocessor_112 (Array Int Int)) (v_DerPreprocessor_113 (Array Int Int)) (v_DerPreprocessor_110 (Array Int Int)) (v_DerPreprocessor_109 (Array Int Int))) (let ((.cse0 (select v_DerPreprocessor_113 24))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_DerPreprocessor_109) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| v_DerPreprocessor_110) .cse0 v_DerPreprocessor_109) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| v_DerPreprocessor_110) .cse0) v_DerPreprocessor_109) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_112) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| v_DerPreprocessor_113) .cse0 v_DerPreprocessor_112) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| v_DerPreprocessor_113) .cse0) v_DerPreprocessor_112) (= (select v_DerPreprocessor_110 24) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) 24)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) 24) .cse0)))) (not (= |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| 4)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| Int)) (and (not (= |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108| 4)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) 24) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|) (not (= 5 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_108|))))) (or (let ((.cse2 (+ |c_aws_linked_list_is_valid_#in~list#1.offset| 24))) (and (= (select .cse1 .cse2) 0) (= (select .cse3 .cse2) 0))) (not (= (select .cse3 .cse4) 0)) (not (= (select .cse1 .cse4) 0)) (and .cse5 .cse6 .cse7 .cse8)) .cse5 (= .cse9 |c_aws_linked_list_is_valid_#in~list#1.base|) .cse6 (= .cse10 .cse4) (not (= .cse10 |c_aws_linked_list_is_valid_#in~list#1.offset|)) .cse7 .cse8))))) is different from true [2022-11-03 02:24:07,396 WARN L234 SmtUtils]: Spent 26.03s on a formula simplification that was a NOOP. DAG size: 99 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:24:12,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:24:12,881 INFO L93 Difference]: Finished difference Result 344 states and 405 transitions. [2022-11-03 02:24:12,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-03 02:24:12,882 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 44 states have internal predecessors, (107), 17 states have call successors, (30), 7 states have call predecessors, (30), 13 states have return successors, (29), 14 states have call predecessors, (29), 17 states have call successors, (29) Word has length 74 [2022-11-03 02:24:12,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:24:12,884 INFO L225 Difference]: With dead ends: 344 [2022-11-03 02:24:12,884 INFO L226 Difference]: Without dead ends: 260 [2022-11-03 02:24:12,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 159 SyntacticMatches, 10 SemanticMatches, 110 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 3338 ImplicationChecksByTransitivity, 146.5s TimeCoverageRelationStatistics Valid=600, Invalid=9911, Unknown=233, NotChecked=1688, Total=12432 [2022-11-03 02:24:12,886 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 64 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1378 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:24:12,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 656 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 706 Invalid, 0 Unknown, 1378 Unchecked, 2.4s Time] [2022-11-03 02:24:12,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-03 02:24:13,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 229. [2022-11-03 02:24:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 156 states have (on average 1.1474358974358974) internal successors, (179), 164 states have internal predecessors, (179), 40 states have call successors, (40), 27 states have call predecessors, (40), 32 states have return successors, (49), 37 states have call predecessors, (49), 39 states have call successors, (49) [2022-11-03 02:24:13,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 268 transitions. [2022-11-03 02:24:13,106 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 268 transitions. Word has length 74 [2022-11-03 02:24:13,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:24:13,106 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 268 transitions. [2022-11-03 02:24:13,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 44 states have internal predecessors, (107), 17 states have call successors, (30), 7 states have call predecessors, (30), 13 states have return successors, (29), 14 states have call predecessors, (29), 17 states have call successors, (29) [2022-11-03 02:24:13,107 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 268 transitions. [2022-11-03 02:24:13,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-03 02:24:13,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:24:13,108 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-11-03 02:24:13,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:24:13,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-03 02:24:13,318 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:24:13,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:24:13,319 INFO L85 PathProgramCache]: Analyzing trace with hash -841274089, now seen corresponding path program 1 times [2022-11-03 02:24:13,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:24:13,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49849437] [2022-11-03 02:24:13,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:13,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:24:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:24:15,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:24:15,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49849437] [2022-11-03 02:24:15,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49849437] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:24:15,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993143153] [2022-11-03 02:24:15,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:24:15,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:24:15,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:24:15,157 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:24:15,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 02:24:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:24:15,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-03 02:24:15,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:24:42,260 WARN L234 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:24:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 02:24:42,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:24:44,839 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:24:44,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2022-11-03 02:24:44,874 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:24:44,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-03 02:24:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:24:45,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993143153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:24:45,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [659934411] [2022-11-03 02:24:45,084 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-03 02:24:45,084 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:24:45,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:24:45,085 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:24:45,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:24:45,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,280 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 02:24:45,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 02:24:45,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,492 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:24:45,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 02:24:45,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:24:45,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-03 02:24:45,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-03 02:24:45,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-03 02:24:45,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-03 02:24:45,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-03 02:24:45,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-03 02:24:45,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:24:45,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-03 02:24:55,745 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 150 for LOIs [2022-11-03 02:24:55,979 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-03 02:24:56,684 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 143 for LOIs [2022-11-03 02:24:56,726 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 112 for LOIs [2022-11-03 02:24:56,744 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-03 02:24:56,807 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:25:30,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18635#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152| Int)) (and (= 1 (select |#valid| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152|)) (not (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152| 4)) (not (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152| 0)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152|) 16) 0) (not (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152| 3)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152|) 0)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152|) 24)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152|) 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152|) 8) 0) (= 32 (select |#length| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152|)) (not (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152| 2)) (not (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152| 5)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152|) 24) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152|) 16) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_152|) 8) 0))) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$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) (= 5 |~#s_can_fail_allocator_static~0.base|) (= 30 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:25:30,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:25:30,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:25:30,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 14] total 36 [2022-11-03 02:25:30,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454591209] [2022-11-03 02:25:30,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:25:30,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 02:25:30,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:30,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 02:25:30,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=3661, Unknown=7, NotChecked=0, Total=4032 [2022-11-03 02:25:30,291 INFO L87 Difference]: Start difference. First operand 229 states and 268 transitions. Second operand has 36 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 32 states have internal predecessors, (104), 18 states have call successors, (29), 4 states have call predecessors, (29), 9 states have return successors, (29), 18 states have call predecessors, (29), 17 states have call successors, (29) [2022-11-03 02:26:07,337 WARN L234 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:26:10,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:10,173 INFO L93 Difference]: Finished difference Result 334 states and 402 transitions. [2022-11-03 02:26:10,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-03 02:26:10,173 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 32 states have internal predecessors, (104), 18 states have call successors, (29), 4 states have call predecessors, (29), 9 states have return successors, (29), 18 states have call predecessors, (29), 17 states have call successors, (29) Word has length 75 [2022-11-03 02:26:10,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:10,176 INFO L225 Difference]: With dead ends: 334 [2022-11-03 02:26:10,176 INFO L226 Difference]: Without dead ends: 293 [2022-11-03 02:26:10,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 182 SyntacticMatches, 10 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 97.3s TimeCoverageRelationStatistics Valid=704, Invalid=7468, Unknown=18, NotChecked=0, Total=8190 [2022-11-03 02:26:10,178 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 210 mSDsluCounter, 1089 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 349 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:10,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1056 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1231 Invalid, 0 Unknown, 349 Unchecked, 3.6s Time] [2022-11-03 02:26:10,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-03 02:26:10,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 217. [2022-11-03 02:26:10,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 149 states have (on average 1.1409395973154361) internal successors, (170), 155 states have internal predecessors, (170), 37 states have call successors, (37), 26 states have call predecessors, (37), 30 states have return successors, (45), 35 states have call predecessors, (45), 36 states have call successors, (45) [2022-11-03 02:26:10,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 252 transitions. [2022-11-03 02:26:10,398 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 252 transitions. Word has length 75 [2022-11-03 02:26:10,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:10,400 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 252 transitions. [2022-11-03 02:26:10,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 32 states have internal predecessors, (104), 18 states have call successors, (29), 4 states have call predecessors, (29), 9 states have return successors, (29), 18 states have call predecessors, (29), 17 states have call successors, (29) [2022-11-03 02:26:10,401 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 252 transitions. [2022-11-03 02:26:10,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:26:10,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:10,402 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 02:26:10,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:10,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_46ffcdda-37e3-41e7-929a-06774b988436/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-03 02:26:10,614 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:10,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:10,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1472651218, now seen corresponding path program 1 times [2022-11-03 02:26:10,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:10,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557846705] [2022-11-03 02:26:10,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:10,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-03 02:26:10,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:10,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557846705] [2022-11-03 02:26:10,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557846705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:10,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:10,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:26:10,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071481923] [2022-11-03 02:26:10,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:10,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:26:10,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:10,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:26:10,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:26:10,966 INFO L87 Difference]: Start difference. First operand 217 states and 252 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 02:26:11,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:11,434 INFO L93 Difference]: Finished difference Result 223 states and 257 transitions. [2022-11-03 02:26:11,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:26:11,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 76 [2022-11-03 02:26:11,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:11,436 INFO L225 Difference]: With dead ends: 223 [2022-11-03 02:26:11,436 INFO L226 Difference]: Without dead ends: 221 [2022-11-03 02:26:11,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:26:11,437 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:11,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 161 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:26:11,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-03 02:26:11,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-11-03 02:26:11,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 152 states have (on average 1.138157894736842) internal successors, (173), 158 states have internal predecessors, (173), 37 states have call successors, (37), 27 states have call predecessors, (37), 31 states have return successors, (45), 35 states have call predecessors, (45), 36 states have call successors, (45) [2022-11-03 02:26:11,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 255 transitions. [2022-11-03 02:26:11,642 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 255 transitions. Word has length 76 [2022-11-03 02:26:11,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:11,645 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 255 transitions. [2022-11-03 02:26:11,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-03 02:26:11,645 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 255 transitions. [2022-11-03 02:26:11,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-03 02:26:11,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:11,646 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-11-03 02:26:11,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-03 02:26:11,647 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:11,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:11,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1544943071, now seen corresponding path program 1 times [2022-11-03 02:26:11,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:11,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063783425] [2022-11-03 02:26:11,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:11,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 02:26:12,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:12,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063783425] [2022-11-03 02:26:12,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063783425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:12,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:12,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:26:12,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380318749] [2022-11-03 02:26:12,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:12,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:26:12,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:12,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:26:12,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:26:12,494 INFO L87 Difference]: Start difference. First operand 221 states and 255 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 02:26:13,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:13,129 INFO L93 Difference]: Finished difference Result 227 states and 260 transitions. [2022-11-03 02:26:13,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:26:13,131 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 82 [2022-11-03 02:26:13,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:13,132 INFO L225 Difference]: With dead ends: 227 [2022-11-03 02:26:13,132 INFO L226 Difference]: Without dead ends: 225 [2022-11-03 02:26:13,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:26:13,133 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:13,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 166 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:26:13,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-03 02:26:13,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-11-03 02:26:13,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 155 states have (on average 1.135483870967742) internal successors, (176), 161 states have internal predecessors, (176), 37 states have call successors, (37), 28 states have call predecessors, (37), 32 states have return successors, (45), 35 states have call predecessors, (45), 36 states have call successors, (45) [2022-11-03 02:26:13,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 258 transitions. [2022-11-03 02:26:13,307 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 258 transitions. Word has length 82 [2022-11-03 02:26:13,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:13,308 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 258 transitions. [2022-11-03 02:26:13,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-03 02:26:13,308 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 258 transitions. [2022-11-03 02:26:13,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 02:26:13,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:13,309 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 5, 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] [2022-11-03 02:26:13,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-03 02:26:13,309 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:13,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:13,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1989417377, now seen corresponding path program 3 times [2022-11-03 02:26:13,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:13,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394412139] [2022-11-03 02:26:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:13,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat