./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9 --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 ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 --- 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-6b4ec56 [2022-11-20 19:59:11,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:59:11,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:59:11,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:59:11,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:59:11,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:59:11,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:59:11,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:59:11,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:59:11,690 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:59:11,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:59:11,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:59:11,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:59:11,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:59:11,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:59:11,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:59:11,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:59:11,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:59:11,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:59:11,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:59:11,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:59:11,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:59:11,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:59:11,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:59:11,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:59:11,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:59:11,727 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:59:11,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:59:11,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:59:11,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:59:11,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:59:11,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:59:11,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:59:11,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:59:11,740 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:59:11,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:59:11,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:59:11,741 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:59:11,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:59:11,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:59:11,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:59:11,744 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-20 19:59:11,779 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:59:11,780 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:59:11,780 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:59:11,780 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:59:11,781 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:59:11,781 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:59:11,781 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:59:11,782 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:59:11,782 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:59:11,782 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:59:11,782 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:59:11,782 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:59:11,782 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:59:11,783 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:59:11,783 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:59:11,783 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:59:11,783 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:59:11,783 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:59:11,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:59:11,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:59:11,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:59:11,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 19:59:11,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:59:11,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 19:59:11,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 19:59:11,786 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:59:11,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 19:59:11,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:59:11,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:59:11,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:59:11,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:59:11,787 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:59:11,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:59:11,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 19:59:11,788 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:59:11,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:59:11,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 19:59:11,789 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:59:11,789 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_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 [2022-11-20 19:59:12,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:59:12,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:59:12,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:59:12,160 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:59:12,161 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:59:12,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2022-11-20 19:59:15,403 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:59:16,026 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:59:16,026 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2022-11-20 19:59:16,059 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/data/ec55aa11e/c030df83f1164471a5b3d17b5065e727/FLAGede71d026 [2022-11-20 19:59:16,084 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/data/ec55aa11e/c030df83f1164471a5b3d17b5065e727 [2022-11-20 19:59:16,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:59:16,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:59:16,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:59:16,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:59:16,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:59:16,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:59:16" (1/1) ... [2022-11-20 19:59:16,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5405464c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:16, skipping insertion in model container [2022-11-20 19:59:16,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:59:16" (1/1) ... [2022-11-20 19:59:16,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:59:16,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:59:16,505 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2022-11-20 19:59:16,516 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2022-11-20 19:59:17,567 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:17,568 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:17,569 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:17,570 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:17,571 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:17,586 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:17,587 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:17,589 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:17,590 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:17,592 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:17,594 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:17,595 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:17,595 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:18,085 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-20 19:59:18,086 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-20 19:59:18,088 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-20 19:59:18,090 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-20 19:59:18,092 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-20 19:59:18,093 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-20 19:59:18,094 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-20 19:59:18,095 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-20 19:59:18,096 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-20 19:59:18,097 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-20 19:59:18,269 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-20 19:59:18,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:59:18,327 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:59:18,358 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2022-11-20 19:59:18,368 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2022-11-20 19:59:18,472 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:18,473 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:18,478 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:18,479 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:18,482 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:18,493 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:18,494 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:18,495 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:18,496 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:18,498 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:18,499 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:18,500 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:18,500 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:59:18,573 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-20 19:59:18,574 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-20 19:59:18,584 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-20 19:59:18,586 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-20 19:59:18,593 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-20 19:59:18,594 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-20 19:59:18,594 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-20 19:59:18,595 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-20 19:59:18,596 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-20 19:59:18,597 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-20 19:59:18,642 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-20 19:59:18,675 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:59:18,945 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:59:18,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:18 WrapperNode [2022-11-20 19:59:18,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:59:18,947 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:59:18,947 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:59:18,947 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:59:18,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:18" (1/1) ... [2022-11-20 19:59:19,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:18" (1/1) ... [2022-11-20 19:59:19,072 INFO L138 Inliner]: procedures = 679, calls = 1039, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 135 [2022-11-20 19:59:19,072 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:59:19,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:59:19,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:59:19,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:59:19,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:18" (1/1) ... [2022-11-20 19:59:19,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:18" (1/1) ... [2022-11-20 19:59:19,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:18" (1/1) ... [2022-11-20 19:59:19,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:18" (1/1) ... [2022-11-20 19:59:19,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:18" (1/1) ... [2022-11-20 19:59:19,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:18" (1/1) ... [2022-11-20 19:59:19,114 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:18" (1/1) ... [2022-11-20 19:59:19,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:18" (1/1) ... [2022-11-20 19:59:19,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:59:19,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:59:19,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:59:19,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:59:19,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:18" (1/1) ... [2022-11-20 19:59:19,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:59:19,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:59:19,195 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:59:19,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:59:19,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 19:59:19,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 19:59:19,239 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 19:59:19,239 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-20 19:59:19,239 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-20 19:59:19,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 19:59:19,239 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-20 19:59:19,239 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-20 19:59:19,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:59:19,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 19:59:19,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:59:19,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:59:19,240 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 19:59:19,240 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 19:59:19,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 19:59:19,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 19:59:19,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 19:59:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-20 19:59:19,241 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-20 19:59:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 19:59:19,603 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:59:19,605 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:59:19,942 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:59:20,131 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:59:20,132 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 19:59:20,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:59:20 BoogieIcfgContainer [2022-11-20 19:59:20,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:59:20,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:59:20,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:59:20,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:59:20,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:59:16" (1/3) ... [2022-11-20 19:59:20,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0e4f6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:59:20, skipping insertion in model container [2022-11-20 19:59:20,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:18" (2/3) ... [2022-11-20 19:59:20,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0e4f6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:59:20, skipping insertion in model container [2022-11-20 19:59:20,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:59:20" (3/3) ... [2022-11-20 19:59:20,146 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rend_harness.i [2022-11-20 19:59:20,166 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:59:20,167 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 19:59:20,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:59:20,226 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;@2ce6ebd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:59:20,226 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 19:59:20,231 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) [2022-11-20 19:59:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 19:59:20,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:20,241 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] [2022-11-20 19:59:20,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:59:20,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:20,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1338419167, now seen corresponding path program 1 times [2022-11-20 19:59:20,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:59:20,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505026047] [2022-11-20 19:59:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:20,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:59:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:59:21,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:59:21,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505026047] [2022-11-20 19:59:21,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505026047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:59:21,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215433718] [2022-11-20 19:59:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:21,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:59:21,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:59:21,322 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:59:21,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 19:59:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:21,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-20 19:59:21,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:21,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 19:59:21,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 19:59:21,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:21,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:21,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:21,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-11-20 19:59:21,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:21,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:21,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:21,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-11-20 19:59:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:59:23,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:59:23,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215433718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:23,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:59:23,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2022-11-20 19:59:23,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27882140] [2022-11-20 19:59:23,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:23,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 19:59:23,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:59:23,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 19:59:23,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-20 19:59:23,739 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 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-20 19:59:24,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:24,148 INFO L93 Difference]: Finished difference Result 101 states and 146 transitions. [2022-11-20 19:59:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 19:59:24,151 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-11-20 19:59:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:24,159 INFO L225 Difference]: With dead ends: 101 [2022-11-20 19:59:24,159 INFO L226 Difference]: Without dead ends: 60 [2022-11-20 19:59:24,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-20 19:59:24,166 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 20 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:59:24,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 239 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 69 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-11-20 19:59:24,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-20 19:59:24,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2022-11-20 19:59:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-20 19:59:24,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2022-11-20 19:59:24,230 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 37 [2022-11-20 19:59:24,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:24,231 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2022-11-20 19:59:24,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-20 19:59:24,232 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2022-11-20 19:59:24,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 19:59:24,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:24,234 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] [2022-11-20 19:59:24,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 19:59:24,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 19:59:24,441 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:59:24,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:24,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2113362132, now seen corresponding path program 1 times [2022-11-20 19:59:24,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:59:24,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838033854] [2022-11-20 19:59:24,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:24,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:59:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 19:59:24,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:59:24,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838033854] [2022-11-20 19:59:24,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838033854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:59:24,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084558889] [2022-11-20 19:59:24,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:24,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:59:24,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:59:24,771 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:59:24,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 19:59:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:25,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-20 19:59:25,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:25,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 19:59:25,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 19:59:25,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:25,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:25,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-20 19:59:25,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:25,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-20 19:59:25,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:25,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:25,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-20 19:59:25,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:25,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-20 19:59:25,414 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-20 19:59:25,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 141 [2022-11-20 19:59:25,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:25,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:25,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:25,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 125 [2022-11-20 19:59:25,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:25,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:25,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-20 19:59:25,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:25,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:25,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:25,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 44 [2022-11-20 19:59:25,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-20 19:59:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:59:27,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:59:31,687 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 16 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|)) (.cse2 (+ 8 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|)) (.cse0 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (and (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse1) 0)) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|))))) (or (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse1) 0)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)) (let ((.cse3 (+ |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 24))) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse3) 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse3) 0))))))) is different from false [2022-11-20 19:59:31,820 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ 16 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|)) (.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0))) (.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse5 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse2 (+ 8 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|))) (and (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)))) (or (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_212 Int)) (or (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse3) 0)) (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse4 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse3) 0)))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|) 0))) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse6 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse6 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|) 0))))) (forall ((v_ArrVal_212 Int)) (let ((.cse8 (+ |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 24))) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse7 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse7 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse8) 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse8) 0)))))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse9 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse9 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)))))) is different from false [2022-11-20 19:59:31,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:59:31,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-11-20 19:59:31,935 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:59:31,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 167 [2022-11-20 19:59:31,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 148 [2022-11-20 19:59:31,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 69 [2022-11-20 19:59:32,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 19:59:32,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:59:32,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 80 [2022-11-20 19:59:32,148 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-20 19:59:32,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-20 19:59:32,169 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:59:32,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-11-20 19:59:32,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:32,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:32,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-11-20 19:59:32,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:59:32,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-11-20 19:59:32,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:32,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-11-20 19:59:32,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:32,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:32,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:32,241 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 19:59:32,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 44 [2022-11-20 19:59:32,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:32,251 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 18 [2022-11-20 19:59:32,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:32,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:32,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:32,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 19:59:32,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:32,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:32,289 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-20 19:59:32,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-20 19:59:32,306 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-20 19:59:32,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:32,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:32,317 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-20 19:59:32,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-20 19:59:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-11-20 19:59:32,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084558889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:59:32,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [749035429] [2022-11-20 19:59:32,459 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-20 19:59:32,459 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:59:32,463 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:59:32,473 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:59:32,473 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:59:32,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:32,581 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 19:59:32,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-20 19:59:32,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:32,672 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:59:32,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-20 19:59:33,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 19:59:33,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-20 19:59:33,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 19:59:33,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 19:59:33,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,285 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:59:33,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-20 19:59:33,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-20 19:59:33,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:33,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-20 19:59:33,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 19:59:33,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-20 19:59:33,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-20 19:59:33,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:33,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:33,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:33,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:33,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:33,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:33,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:34,103 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-20 19:59:34,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-11-20 19:59:34,594 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-11-20 19:59:34,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 650 treesize of output 680 [2022-11-20 19:59:34,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:34,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:34,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:34,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:34,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:34,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:34,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:34,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:34,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:34,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:34,981 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-20 19:59:34,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 14 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 678 treesize of output 687 [2022-11-20 19:59:35,142 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-11-20 19:59:35,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 645 treesize of output 656 [2022-11-20 19:59:35,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:35,220 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-20 19:59:35,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 682 treesize of output 635 [2022-11-20 19:59:35,282 INFO L350 Elim1Store]: Elim1 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 656 treesize of output 635 [2022-11-20 19:59:42,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:42,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 [2022-11-20 19:59:43,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:43,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 19:59:43,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:43,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-20 19:59:43,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:43,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:43,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-20 19:59:43,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:43,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-20 19:59:43,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 19:59:43,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 19:59:43,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:43,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 19:59:43,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:43,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:43,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-20 19:59:43,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:43,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 19:59:43,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:43,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 19:59:44,032 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2022-11-20 19:59:44,256 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 136 for LOIs [2022-11-20 19:59:44,308 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 19:59:44,329 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:59:47,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [749035429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:47,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:59:47,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 9, 8] total 30 [2022-11-20 19:59:47,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577135593] [2022-11-20 19:59:47,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:47,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 19:59:47,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:59:47,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 19:59:47,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=666, Unknown=6, NotChecked=106, Total=870 [2022-11-20 19:59:47,472 INFO L87 Difference]: Start difference. First operand 47 states and 62 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) [2022-11-20 19:59:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:48,114 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2022-11-20 19:59:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 19:59:48,116 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 [2022-11-20 19:59:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:48,118 INFO L225 Difference]: With dead ends: 87 [2022-11-20 19:59:48,119 INFO L226 Difference]: Without dead ends: 51 [2022-11-20 19:59:48,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=101, Invalid=713, Unknown=6, NotChecked=110, Total=930 [2022-11-20 19:59:48,120 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 4 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:59:48,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 346 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-11-20 19:59:48,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-20 19:59:48,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2022-11-20 19:59:48,159 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) [2022-11-20 19:59:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-11-20 19:59:48,169 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 38 [2022-11-20 19:59:48,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:48,169 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-11-20 19:59:48,170 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) [2022-11-20 19:59:48,170 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-11-20 19:59:48,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 19:59:48,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:48,173 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] [2022-11-20 19:59:48,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 19:59:48,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:59:48,383 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:59:48,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:48,384 INFO L85 PathProgramCache]: Analyzing trace with hash -303925925, now seen corresponding path program 1 times [2022-11-20 19:59:48,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:59:48,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476484] [2022-11-20 19:59:48,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:48,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:59:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:59:48,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:59:48,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476484] [2022-11-20 19:59:48,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:59:48,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109095607] [2022-11-20 19:59:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:48,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:59:48,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:59:48,543 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:59:48,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 19:59:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:48,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:59:48,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:59:48,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:59:48,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109095607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:48,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:59:48,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-20 19:59:48,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491290069] [2022-11-20 19:59:48,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:48,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:59:48,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:59:48,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:59:48,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-20 19:59:48,807 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) [2022-11-20 19:59:48,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:48,960 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2022-11-20 19:59:48,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:59:48,960 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 [2022-11-20 19:59:48,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:48,961 INFO L225 Difference]: With dead ends: 86 [2022-11-20 19:59:48,961 INFO L226 Difference]: Without dead ends: 52 [2022-11-20 19:59:48,962 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 [2022-11-20 19:59:48,963 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 104 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 [2022-11-20 19:59:48,963 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] [2022-11-20 19:59:48,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-20 19:59:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-20 19:59:48,981 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) [2022-11-20 19:59:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-11-20 19:59:48,982 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 39 [2022-11-20 19:59:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:48,983 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-11-20 19:59:48,983 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) [2022-11-20 19:59:48,983 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-11-20 19:59:48,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 19:59:48,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:48,984 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] [2022-11-20 19:59:48,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 19:59:49,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:59:49,191 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:59:49,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:49,191 INFO L85 PathProgramCache]: Analyzing trace with hash 840951937, now seen corresponding path program 1 times [2022-11-20 19:59:49,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:59:49,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646141653] [2022-11-20 19:59:49,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:49,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:59:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:59:49,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:59:49,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646141653] [2022-11-20 19:59:49,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646141653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:59:49,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233272282] [2022-11-20 19:59:49,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:49,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:59:49,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:59:49,419 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:59:49,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 19:59:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:49,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 19:59:49,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:59:49,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:59:49,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233272282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:49,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:59:49,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-20 19:59:49,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104995417] [2022-11-20 19:59:49,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:49,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 19:59:49,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:59:49,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 19:59:49,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-20 19:59:49,682 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) [2022-11-20 19:59:49,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:49,903 INFO L93 Difference]: Finished difference Result 103 states and 141 transitions. [2022-11-20 19:59:49,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 19:59:49,904 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 [2022-11-20 19:59:49,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:49,905 INFO L225 Difference]: With dead ends: 103 [2022-11-20 19:59:49,905 INFO L226 Difference]: Without dead ends: 64 [2022-11-20 19:59:49,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-20 19:59:49,907 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 65 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:59:49,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 165 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:59:49,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-20 19:59:49,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-11-20 19:59:49,924 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) [2022-11-20 19:59:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2022-11-20 19:59:49,925 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 41 [2022-11-20 19:59:49,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:49,926 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2022-11-20 19:59:49,926 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) [2022-11-20 19:59:49,926 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2022-11-20 19:59:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 19:59:49,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:49,927 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] [2022-11-20 19:59:49,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 19:59:50,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-20 19:59:50,134 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:59:50,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:50,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1878159694, now seen corresponding path program 1 times [2022-11-20 19:59:50,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:59:50,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22664945] [2022-11-20 19:59:50,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:50,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:59:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:50,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:59:50,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:59:50,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22664945] [2022-11-20 19:59:50,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22664945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:59:50,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494510297] [2022-11-20 19:59:50,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:50,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:59:50,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:59:50,385 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:59:50,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 19:59:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:50,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:59:50,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 19:59:50,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:59:50,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494510297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:50,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:59:50,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-20 19:59:50,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911454855] [2022-11-20 19:59:50,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:50,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:59:50,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:59:50,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:59:50,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 19:59:50,609 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) [2022-11-20 19:59:50,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:50,677 INFO L93 Difference]: Finished difference Result 104 states and 145 transitions. [2022-11-20 19:59:50,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:59:50,678 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 [2022-11-20 19:59:50,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:50,682 INFO L225 Difference]: With dead ends: 104 [2022-11-20 19:59:50,682 INFO L226 Difference]: Without dead ends: 63 [2022-11-20 19:59:50,686 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 [2022-11-20 19:59:50,688 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 42 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 [2022-11-20 19:59:50,688 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] [2022-11-20 19:59:50,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-20 19:59:50,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-11-20 19:59:50,720 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) [2022-11-20 19:59:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-11-20 19:59:50,723 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 42 [2022-11-20 19:59:50,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:50,725 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-11-20 19:59:50,726 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) [2022-11-20 19:59:50,726 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-11-20 19:59:50,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 19:59:50,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:50,733 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] [2022-11-20 19:59:50,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 19:59:50,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:59:50,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:59:50,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:50,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1695628998, now seen corresponding path program 1 times [2022-11-20 19:59:50,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:59:50,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695277989] [2022-11-20 19:59:50,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:50,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:59:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:59:51,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:59:51,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695277989] [2022-11-20 19:59:51,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695277989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:59:51,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573754193] [2022-11-20 19:59:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:51,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:59:51,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:59:51,183 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:59:51,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 19:59:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:51,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-20 19:59:51,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:51,517 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-20 19:59:51,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-20 19:59:51,538 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 19:59:51,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-20 19:59:51,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-20 19:59:51,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-20 19:59:51,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:51,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2022-11-20 19:59:51,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:00:03,340 WARN L233 SmtUtils]: Spent 10.00s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:00:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:06,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:00:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:00:10,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573754193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:00:10,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2043894443] [2022-11-20 20:00:10,430 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-20 20:00:10,431 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:00:10,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:00:10,431 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:00:10,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:00:10,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,501 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 20:00:10,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-20 20:00:10,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,577 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 20:00:10,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-20 20:00:10,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:00:10,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-20 20:00:10,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:00:10,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 20:00:10,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-20 20:00:10,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-20 20:00:11,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:00:11,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-20 20:00:11,768 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 130 for LOIs [2022-11-20 20:00:12,436 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 170 for LOIs [2022-11-20 20:00:12,501 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 20:00:12,517 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-20 20:00:12,588 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:00:19,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2043894443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:19,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:00:19,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14, 8] total 42 [2022-11-20 20:00:19,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71800311] [2022-11-20 20:00:19,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:19,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 20:00:19,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:19,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 20:00:19,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 20:00:19,726 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) [2022-11-20 20:00:20,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:20,716 INFO L93 Difference]: Finished difference Result 127 states and 175 transitions. [2022-11-20 20:00:20,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 20:00:20,717 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 [2022-11-20 20:00:20,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:20,718 INFO L225 Difference]: With dead ends: 127 [2022-11-20 20:00:20,719 INFO L226 Difference]: Without dead ends: 80 [2022-11-20 20:00:20,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 20:00:20,720 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 9 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:20,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 448 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 322 Invalid, 0 Unknown, 156 Unchecked, 0.9s Time] [2022-11-20 20:00:20,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-20 20:00:20,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2022-11-20 20:00:20,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 43 states have internal predecessors, (52), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (19), 13 states have call predecessors, (19), 14 states have call successors, (19) [2022-11-20 20:00:20,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2022-11-20 20:00:20,753 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 45 [2022-11-20 20:00:20,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:20,754 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2022-11-20 20:00:20,754 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) [2022-11-20 20:00:20,754 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2022-11-20 20:00:20,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 20:00:20,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:20,755 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] [2022-11-20 20:00:20,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:00:20,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:20,963 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:20,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:20,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1964135121, now seen corresponding path program 1 times [2022-11-20 20:00:20,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:20,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724906151] [2022-11-20 20:00:20,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:20,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:00:21,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:21,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724906151] [2022-11-20 20:00:21,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724906151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:00:21,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722772068] [2022-11-20 20:00:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:21,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:21,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:00:21,315 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:00:21,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:00:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:21,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-20 20:00:21,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:21,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-20 20:00:21,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:21,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 20:00:21,756 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-20 20:00:21,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 115 [2022-11-20 20:00:21,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:21,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 91 [2022-11-20 20:00:21,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:21,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-20 20:00:21,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-20 20:00:21,880 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|))) (let ((.cse0 (select .cse1 24))) (and (not (= .cse0 0)) (= (select .cse1 0) .cse0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| v_DerPreprocessor_21) .cse0 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| v_DerPreprocessor_21) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= .cse0 (select v_DerPreprocessor_21 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|) (<= (+ 2 .cse0) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|))))) is different from true [2022-11-20 20:00:32,564 WARN L233 SmtUtils]: Spent 6.98s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:00:35,554 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49| Int) (v_DerPreprocessor_22 (Array Int Int)) (v_DerPreprocessor_23 (Array Int Int))) (let ((.cse2 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|))) (let ((.cse1 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|)) (.cse0 (select .cse2 24))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_22) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49| v_DerPreprocessor_23) .cse0 v_DerPreprocessor_22) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49| v_DerPreprocessor_23) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= (select .cse1 8) 0) (not (= .cse0 0)) (= (select .cse1 16) 0) (= (select .cse2 8) 0) (= .cse0 (select v_DerPreprocessor_23 24)) (= .cse0 (select .cse2 0)) (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|) (= (select .cse2 16) 0) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|))))) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3| Int) (v_DerPreprocessor_24 (Array Int Int)) (v_DerPreprocessor_25 (Array Int Int))) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3|))) (let ((.cse3 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3|)) (.cse4 (select .cse5 24))) (and (= (select .cse3 16) 0) (= .cse4 (select v_DerPreprocessor_25 24)) (= (select |c_#memory_$Pointer$.base| .cse4) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_24) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3| v_DerPreprocessor_25) .cse4 v_DerPreprocessor_24) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3| v_DerPreprocessor_25) .cse4)) (= (select .cse5 16) 0) (= .cse4 (select .cse5 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3|) (= (select .cse3 8) 0) (<= (+ 2 .cse4) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3|) (= (select .cse5 8) 0) (not (= .cse4 0)))))) (exists ((v_DerPreprocessor_26 (Array Int Int)) (v_DerPreprocessor_27 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_4| Int)) (let ((.cse6 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_4|))) (let ((.cse7 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_4|)) (.cse8 (select .cse6 24))) (and (= (select .cse6 8) 0) (= (select .cse7 8) 0) (= (select .cse7 16) 0) (= (select .cse6 16) 0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse8 v_DerPreprocessor_26) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_4| v_DerPreprocessor_27) .cse8 v_DerPreprocessor_26) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_4| v_DerPreprocessor_27) .cse8) (select |c_#memory_$Pointer$.base| .cse8)) (= .cse8 (select .cse6 0)) (<= (+ 2 .cse8) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_4|) (= (select v_DerPreprocessor_27 24) .cse8) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_4|) (not (= .cse8 0)))))) (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| Int)) (let ((.cse10 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|))) (let ((.cse9 (select .cse10 24))) (and (not (= .cse9 0)) (= (select .cse10 0) .cse9) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse9 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| v_DerPreprocessor_21) .cse9 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| v_DerPreprocessor_21) .cse9) (select |c_#memory_$Pointer$.base| .cse9)) (= .cse9 (select v_DerPreprocessor_21 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|) (<= (+ 2 .cse9) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|)))))) is different from true [2022-11-20 20:00:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-11-20 20:00:38,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:00:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 20:00:43,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722772068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:00:43,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1125276202] [2022-11-20 20:00:43,440 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-20 20:00:43,441 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:00:43,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:00:43,441 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:00:43,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:00:43,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,516 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 20:00:43,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-20 20:00:43,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-20 20:00:43,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-20 20:00:43,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:00:43,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:00:43,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 20:00:43,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:43,901 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 20:00:43,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-20 20:00:43,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-20 20:00:43,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,042 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 20:00:44,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-20 20:00:44,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:44,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-20 20:00:44,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:00:44,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-20 20:00:44,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:00:44,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:00:44,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:44,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 20:00:44,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-20 20:00:44,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-20 20:00:44,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-20 20:00:44,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:00:44,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:00:44,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 20:00:44,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-20 20:00:44,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-20 20:00:44,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:44,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-20 20:00:44,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-20 20:00:44,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 20:00:44,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:00:44,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:00:45,610 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-20 20:00:46,010 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 156 for LOIs [2022-11-20 20:00:46,064 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 20:00:46,081 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-20 20:00:46,165 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:00:53,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1125276202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:53,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:00:53,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 23, 8] total 52 [2022-11-20 20:00:53,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177849284] [2022-11-20 20:00:53,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:53,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 20:00:53,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:53,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 20:00:53,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2184, Unknown=86, NotChecked=194, Total=2652 [2022-11-20 20:00:53,068 INFO L87 Difference]: Start difference. First operand 66 states and 86 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) [2022-11-20 20:00:54,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:54,270 INFO L93 Difference]: Finished difference Result 120 states and 156 transitions. [2022-11-20 20:00:54,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 20:00:54,272 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 [2022-11-20 20:00:54,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:54,274 INFO L225 Difference]: With dead ends: 120 [2022-11-20 20:00:54,274 INFO L226 Difference]: Without dead ends: 73 [2022-11-20 20:00:54,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=203, Invalid=2366, Unknown=91, NotChecked=202, Total=2862 [2022-11-20 20:00:54,275 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:54,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 180 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 222 Invalid, 0 Unknown, 153 Unchecked, 0.5s Time] [2022-11-20 20:00:54,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-20 20:00:54,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2022-11-20 20:00:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.263157894736842) internal successors, (48), 40 states have internal predecessors, (48), 14 states have call successors, (14), 8 states have call predecessors, (14), 9 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-20 20:00:54,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2022-11-20 20:00:54,307 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 46 [2022-11-20 20:00:54,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:54,308 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2022-11-20 20:00:54,308 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) [2022-11-20 20:00:54,308 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2022-11-20 20:00:54,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 20:00:54,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:54,309 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] [2022-11-20 20:00:54,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 20:00:54,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:54,516 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:00:54,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:54,517 INFO L85 PathProgramCache]: Analyzing trace with hash -850872160, now seen corresponding path program 1 times [2022-11-20 20:00:54,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:54,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457885046] [2022-11-20 20:00:54,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:54,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:00:55,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:55,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457885046] [2022-11-20 20:00:55,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457885046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:00:55,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813742905] [2022-11-20 20:00:55,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:55,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:55,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:00:55,323 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:00:55,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 20:00:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:55,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 20:00:55,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 20:01:00,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:01:02,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813742905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:02,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1349736192] [2022-11-20 20:01:02,416 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 20:01:02,416 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:01:02,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:01:02,417 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:01:02,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:01:02,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,478 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 20:01:02,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-20 20:01:02,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,546 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 20:01:02,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-20 20:01:02,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-20 20:01:02,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:01:02,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 20:01:02,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:01:02,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-20 20:01:02,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:01:02,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-20 20:01:03,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:03,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:03,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-20 20:01:03,729 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 128 for LOIs [2022-11-20 20:01:04,740 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 173 for LOIs [2022-11-20 20:01:04,807 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 20:01:04,823 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 20:01:04,893 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:01:12,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1349736192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:12,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:01:12,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-20 20:01:12,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834291605] [2022-11-20 20:01:12,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:12,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 20:01:12,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:01:12,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 20:01:12,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1162, Unknown=2, NotChecked=0, Total=1332 [2022-11-20 20:01:12,941 INFO L87 Difference]: Start difference. First operand 62 states and 80 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) [2022-11-20 20:01:17,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:17,653 INFO L93 Difference]: Finished difference Result 153 states and 210 transitions. [2022-11-20 20:01:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 20:01:17,654 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 [2022-11-20 20:01:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:17,655 INFO L225 Difference]: With dead ends: 153 [2022-11-20 20:01:17,656 INFO L226 Difference]: Without dead ends: 105 [2022-11-20 20:01:17,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=270, Invalid=1534, Unknown=2, NotChecked=0, Total=1806 [2022-11-20 20:01:17,657 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 110 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:17,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 197 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 370 Invalid, 0 Unknown, 199 Unchecked, 1.3s Time] [2022-11-20 20:01:17,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-20 20:01:17,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2022-11-20 20:01:17,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 66 states have internal predecessors, (77), 25 states have call successors, (25), 10 states have call predecessors, (25), 11 states have return successors, (34), 23 states have call predecessors, (34), 24 states have call successors, (34) [2022-11-20 20:01:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2022-11-20 20:01:17,728 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 47 [2022-11-20 20:01:17,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:17,728 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2022-11-20 20:01:17,729 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) [2022-11-20 20:01:17,729 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2022-11-20 20:01:17,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 20:01:17,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:17,730 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] [2022-11-20 20:01:17,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:17,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 20:01:17,935 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:17,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:17,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1509868147, now seen corresponding path program 1 times [2022-11-20 20:01:17,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:17,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655728655] [2022-11-20 20:01:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:17,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 20:01:18,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:18,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655728655] [2022-11-20 20:01:18,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655728655] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:01:18,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335568431] [2022-11-20 20:01:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:18,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:18,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:18,154 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:01:18,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 20:01:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:18,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-20 20:01:18,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:01:24,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:01:29,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335568431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:29,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1792017138] [2022-11-20 20:01:29,319 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 20:01:29,319 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:01:29,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:01:29,320 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:01:29,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:01:29,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,390 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 20:01:29,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-20 20:01:29,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,456 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 20:01:29,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-20 20:01:29,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 20:01:29,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:01:29,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:01:29,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-20 20:01:29,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-20 20:01:29,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-20 20:01:29,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-20 20:01:29,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:29,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:01:31,507 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 126 for LOIs [2022-11-20 20:01:31,608 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-20 20:01:32,433 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-20 20:01:32,434 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 20:01:32,454 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 20:01:32,530 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:01:48,108 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4117#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| Int)) (and (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| 0)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 24))) (<= 0 |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 8) 0) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| 4)) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 1) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| 2)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| 3)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 24) 0) (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 24)) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 24)) |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 16) 0))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:01:48,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:01:48,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:01:48,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 11] total 26 [2022-11-20 20:01:48,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121129429] [2022-11-20 20:01:48,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:01:48,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 20:01:48,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:01:48,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 20:01:48,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2437, Unknown=1, NotChecked=0, Total=2756 [2022-11-20 20:01:48,111 INFO L87 Difference]: Start difference. First operand 100 states and 136 transitions. Second operand has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 10 states have call successors, (22), 4 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-20 20:01:50,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:50,492 INFO L93 Difference]: Finished difference Result 213 states and 307 transitions. [2022-11-20 20:01:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 20:01:50,493 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 10 states have call successors, (22), 4 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 48 [2022-11-20 20:01:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:50,495 INFO L225 Difference]: With dead ends: 213 [2022-11-20 20:01:50,495 INFO L226 Difference]: Without dead ends: 145 [2022-11-20 20:01:50,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 88 SyntacticMatches, 10 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=436, Invalid=3723, Unknown=1, NotChecked=0, Total=4160 [2022-11-20 20:01:50,498 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 141 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:50,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 370 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 478 Invalid, 0 Unknown, 92 Unchecked, 0.8s Time] [2022-11-20 20:01:50,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-20 20:01:50,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 118. [2022-11-20 20:01:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 77 states have internal predecessors, (88), 29 states have call successors, (29), 13 states have call predecessors, (29), 14 states have return successors, (38), 27 states have call predecessors, (38), 28 states have call successors, (38) [2022-11-20 20:01:50,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 155 transitions. [2022-11-20 20:01:50,564 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 155 transitions. Word has length 48 [2022-11-20 20:01:50,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:50,565 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 155 transitions. [2022-11-20 20:01:50,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 10 states have call successors, (22), 4 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-20 20:01:50,565 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 155 transitions. [2022-11-20 20:01:50,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 20:01:50,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:50,567 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 20:01:50,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:50,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:50,768 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:50,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:50,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1274670411, now seen corresponding path program 1 times [2022-11-20 20:01:50,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:50,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370767264] [2022-11-20 20:01:50,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:50,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 20:01:51,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:51,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370767264] [2022-11-20 20:01:51,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370767264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:01:51,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173924941] [2022-11-20 20:01:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:51,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:51,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:51,837 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:01:51,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 20:01:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:52,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 20:01:52,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 20:01:54,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 20:01:55,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173924941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:55,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2029460111] [2022-11-20 20:01:55,291 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 20:01:55,291 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:01:55,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:01:55,292 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:01:55,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:01:55,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,362 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 20:01:55,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-20 20:01:55,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-20 20:01:55,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-20 20:01:55,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:01:55,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 20:01:55,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:01:55,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:01:55,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:55,774 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 20:01:55,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-20 20:01:55,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,867 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 20:01:55,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-20 20:01:55,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-20 20:01:55,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:55,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-20 20:01:55,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:55,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-20 20:01:56,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:56,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 20:01:56,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-20 20:01:56,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-20 20:01:56,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-20 20:01:56,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:01:56,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:01:56,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 20:01:56,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-20 20:01:56,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:56,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-20 20:01:56,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-20 20:01:56,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:01:56,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:01:56,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:01:56,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-20 20:01:56,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:01:56,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:56,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 20:01:56,972 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-20 20:01:57,749 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-20 20:01:57,794 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 20:01:57,813 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 20:01:57,881 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:02:04,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2029460111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:02:04,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:02:04,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-20 20:02:04,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622695602] [2022-11-20 20:02:04,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:02:04,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 20:02:04,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:02:04,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 20:02:04,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 20:02:04,422 INFO L87 Difference]: Start difference. First operand 118 states and 155 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) [2022-11-20 20:02:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:05,588 INFO L93 Difference]: Finished difference Result 240 states and 310 transitions. [2022-11-20 20:02:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 20:02:05,588 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 64 [2022-11-20 20:02:05,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:05,590 INFO L225 Difference]: With dead ends: 240 [2022-11-20 20:02:05,590 INFO L226 Difference]: Without dead ends: 142 [2022-11-20 20:02:05,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 20:02:05,592 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 54 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:02:05,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 140 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 208 Invalid, 0 Unknown, 157 Unchecked, 0.4s Time] [2022-11-20 20:02:05,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-20 20:02:05,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 122. [2022-11-20 20:02:05,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 82 states have internal predecessors, (91), 29 states have call successors, (29), 13 states have call predecessors, (29), 14 states have return successors, (30), 26 states have call predecessors, (30), 28 states have call successors, (30) [2022-11-20 20:02:05,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 150 transitions. [2022-11-20 20:02:05,675 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 150 transitions. Word has length 64 [2022-11-20 20:02:05,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:05,676 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 150 transitions. [2022-11-20 20:02:05,676 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) [2022-11-20 20:02:05,676 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 150 transitions. [2022-11-20 20:02:05,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 20:02:05,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:05,677 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-20 20:02:05,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 20:02:05,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 20:02:05,885 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:02:05,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:05,885 INFO L85 PathProgramCache]: Analyzing trace with hash 557997523, now seen corresponding path program 1 times [2022-11-20 20:02:05,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:02:05,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478175276] [2022-11-20 20:02:05,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:05,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:02:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 20:02:06,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:02:06,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478175276] [2022-11-20 20:02:06,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478175276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:02:06,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556465793] [2022-11-20 20:02:06,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:06,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:06,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:02:06,127 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:02:06,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 20:02:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:06,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 20:02:06,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 20:02:06,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 20:02:06,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556465793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:02:06,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1010953418] [2022-11-20 20:02:06,696 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 20:02:06,697 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:02:06,697 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:02:06,697 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:02:06,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:02:06,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:06,765 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 20:02:06,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-20 20:02:06,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:06,831 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 20:02:06,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-20 20:02:07,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:02:07,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-20 20:02:07,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 20:02:07,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:02:07,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-20 20:02:07,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-20 20:02:07,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:02:07,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:07,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-20 20:02:16,389 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 145 for LOIs [2022-11-20 20:02:16,637 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-20 20:02:17,344 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-20 20:02:17,382 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 20:02:17,398 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 20:02:17,458 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:02:35,150 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6009#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (<= |#NULL.offset| 0) (= (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51| Int)) (and (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0) 4)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) (not (= 2 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0))) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0) 0)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) 1) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) 16) 0) (= 32 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0))) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) 8) 0) (not (= 3 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0))) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) 24) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) 16) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_51|) 0)) 8) 0))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$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) (= 40 (select |#length| 4)) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:02:35,150 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:02:35,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:02:35,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 14 [2022-11-20 20:02:35,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974598434] [2022-11-20 20:02:35,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:02:35,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 20:02:35,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:02:35,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 20:02:35,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1536, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 20:02:35,153 INFO L87 Difference]: Start difference. First operand 122 states and 150 transitions. Second operand has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-20 20:02:35,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:35,505 INFO L93 Difference]: Finished difference Result 192 states and 247 transitions. [2022-11-20 20:02:35,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 20:02:35,505 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 64 [2022-11-20 20:02:35,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:35,507 INFO L225 Difference]: With dead ends: 192 [2022-11-20 20:02:35,507 INFO L226 Difference]: Without dead ends: 137 [2022-11-20 20:02:35,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 20:02:35,509 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:02:35,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 438 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:02:35,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-20 20:02:35,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 125. [2022-11-20 20:02:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.1625) internal successors, (93), 85 states have internal predecessors, (93), 29 states have call successors, (29), 13 states have call predecessors, (29), 15 states have return successors, (33), 26 states have call predecessors, (33), 28 states have call successors, (33) [2022-11-20 20:02:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 155 transitions. [2022-11-20 20:02:35,573 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 155 transitions. Word has length 64 [2022-11-20 20:02:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:35,574 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 155 transitions. [2022-11-20 20:02:35,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-20 20:02:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 155 transitions. [2022-11-20 20:02:35,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-20 20:02:35,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:35,576 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-11-20 20:02:35,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 20:02:35,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 20:02:35,783 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:02:35,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:35,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1356635027, now seen corresponding path program 1 times [2022-11-20 20:02:35,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:02:35,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784942900] [2022-11-20 20:02:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:35,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:02:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 20:02:36,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:02:36,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784942900] [2022-11-20 20:02:36,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784942900] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:02:36,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147408671] [2022-11-20 20:02:36,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:36,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:36,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:02:36,462 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:02:36,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 20:02:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:36,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 20:02:36,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:02:36,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 20:02:37,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147408671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:02:37,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1321770057] [2022-11-20 20:02:37,208 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 20:02:37,209 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:02:37,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:02:37,209 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:02:37,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:02:37,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,280 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 20:02:37,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-20 20:02:37,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-20 20:02:37,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:02:37,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:02:37,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 20:02:37,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-20 20:02:37,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:02:37,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-20 20:02:37,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-20 20:02:37,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:37,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-20 20:02:39,070 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 126 for LOIs [2022-11-20 20:02:39,147 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 17 for LOIs [2022-11-20 20:02:39,669 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-20 20:02:39,670 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 20:02:39,687 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 20:02:39,746 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:02:51,813 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6929#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= (select |#valid| 4) 1) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| Int)) (and (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 0)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| 2)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| 4)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 16) 0) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| 3)) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 8) 0) (<= 0 |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 8) 0) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 1) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| 0)) (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 24)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 24) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 0) 16) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_11|) 16) 0))) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:02:51,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:02:51,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:02:51,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 26 [2022-11-20 20:02:51,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308945292] [2022-11-20 20:02:51,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:02:51,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 20:02:51,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:02:51,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 20:02:51,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2517, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 20:02:51,817 INFO L87 Difference]: Start difference. First operand 125 states and 155 transitions. Second operand has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-20 20:02:53,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:53,792 INFO L93 Difference]: Finished difference Result 272 states and 399 transitions. [2022-11-20 20:02:53,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 20:02:53,795 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) Word has length 66 [2022-11-20 20:02:53,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:53,797 INFO L225 Difference]: With dead ends: 272 [2022-11-20 20:02:53,798 INFO L226 Difference]: Without dead ends: 208 [2022-11-20 20:02:53,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 158 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=532, Invalid=5630, Unknown=0, NotChecked=0, Total=6162 [2022-11-20 20:02:53,800 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 152 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:02:53,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 513 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 20:02:53,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-20 20:02:53,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 168. [2022-11-20 20:02:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 104 states have (on average 1.1730769230769231) internal successors, (122), 111 states have internal predecessors, (122), 45 states have call successors, (45), 13 states have call predecessors, (45), 18 states have return successors, (58), 43 states have call predecessors, (58), 44 states have call successors, (58) [2022-11-20 20:02:53,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 225 transitions. [2022-11-20 20:02:53,930 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 225 transitions. Word has length 66 [2022-11-20 20:02:53,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:53,931 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 225 transitions. [2022-11-20 20:02:53,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-20 20:02:53,931 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 225 transitions. [2022-11-20 20:02:53,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 20:02:53,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:53,933 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] [2022-11-20 20:02:53,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 20:02:54,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:54,140 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:02:54,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:54,141 INFO L85 PathProgramCache]: Analyzing trace with hash 907432197, now seen corresponding path program 1 times [2022-11-20 20:02:54,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:02:54,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322835087] [2022-11-20 20:02:54,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:54,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:02:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 20:02:55,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:02:55,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322835087] [2022-11-20 20:02:55,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322835087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:02:55,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620780632] [2022-11-20 20:02:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:55,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:55,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:02:55,848 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:02:55,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 20:02:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:56,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-20 20:02:56,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:56,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-20 20:02:56,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:56,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 20:02:56,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:56,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:56,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 21 [2022-11-20 20:02:56,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:56,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-11-20 20:02:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 20:02:56,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:57,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:57,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-11-20 20:02:57,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:57,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 149 [2022-11-20 20:02:57,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 144 [2022-11-20 20:02:57,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 142 [2022-11-20 20:02:57,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:02:57,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 48 [2022-11-20 20:02:57,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:57,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 63 [2022-11-20 20:02:57,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-20 20:02:57,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:02:57,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:57,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 72 [2022-11-20 20:02:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 20:02:57,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620780632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:02:57,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [926158435] [2022-11-20 20:02:57,702 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 20:02:57,702 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:02:57,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:02:57,703 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:02:57,703 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:02:57,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:57,773 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 20:02:57,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-20 20:02:57,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:57,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-20 20:02:57,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:57,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 20:02:58,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:02:58,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:02:58,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-20 20:02:58,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:58,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:58,135 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 20:02:58,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-20 20:02:58,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,228 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-20 20:02:58,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-20 20:02:58,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,352 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 20:02:58,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-20 20:02:58,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:02:58,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-20 20:02:58,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-20 20:02:58,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 20:02:58,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-20 20:02:58,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-20 20:02:58,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:58,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-20 20:02:58,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:02:58,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:02:58,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:02:58,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:02:58,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 20:02:58,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-20 20:02:58,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-20 20:02:58,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:58,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-20 20:02:58,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-20 20:02:58,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 20:02:58,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:02:58,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:58,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:03:00,256 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2022-11-20 20:03:00,261 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 34 for LOIs [2022-11-20 20:03:01,476 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-20 20:03:01,511 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 20:03:01,527 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 20:03:01,586 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:03:09,486 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8103#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:03:09,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:03:09,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:03:09,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 32 [2022-11-20 20:03:09,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908975878] [2022-11-20 20:03:09,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:03:09,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 20:03:09,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:03:09,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 20:03:09,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=3297, Unknown=10, NotChecked=0, Total=3540 [2022-11-20 20:03:09,490 INFO L87 Difference]: Start difference. First operand 168 states and 225 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) [2022-11-20 20:03:10,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:10,837 INFO L93 Difference]: Finished difference Result 259 states and 350 transitions. [2022-11-20 20:03:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 20:03:10,838 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 [2022-11-20 20:03:10,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:10,840 INFO L225 Difference]: With dead ends: 259 [2022-11-20 20:03:10,840 INFO L226 Difference]: Without dead ends: 206 [2022-11-20 20:03:10,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 11 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=339, Invalid=4481, Unknown=10, NotChecked=0, Total=4830 [2022-11-20 20:03:10,842 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 136 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:10,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 625 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 444 Invalid, 0 Unknown, 204 Unchecked, 0.6s Time] [2022-11-20 20:03:10,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-20 20:03:10,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 189. [2022-11-20 20:03:10,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 120 states have (on average 1.1666666666666667) internal successors, (140), 128 states have internal predecessors, (140), 48 states have call successors, (48), 15 states have call predecessors, (48), 20 states have return successors, (61), 45 states have call predecessors, (61), 47 states have call successors, (61) [2022-11-20 20:03:10,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 249 transitions. [2022-11-20 20:03:10,956 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 249 transitions. Word has length 68 [2022-11-20 20:03:10,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:10,957 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 249 transitions. [2022-11-20 20:03:10,957 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) [2022-11-20 20:03:10,957 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 249 transitions. [2022-11-20 20:03:10,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 20:03:10,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:10,959 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] [2022-11-20 20:03:10,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-20 20:03:11,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 20:03:11,166 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:03:11,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:11,166 INFO L85 PathProgramCache]: Analyzing trace with hash -277742896, now seen corresponding path program 2 times [2022-11-20 20:03:11,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:03:11,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694783138] [2022-11-20 20:03:11,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:11,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:03:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 20:03:13,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:03:13,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694783138] [2022-11-20 20:03:13,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694783138] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:03:13,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517059497] [2022-11-20 20:03:13,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:03:13,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:03:13,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:03:13,917 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:03:13,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 20:03:14,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:03:14,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:03:14,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 118 conjunts are in the unsatisfiable core [2022-11-20 20:03:14,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 20:03:17,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:24,760 INFO L321 Elim1Store]: treesize reduction 95, result has 1.0 percent of original size [2022-11-20 20:03:24,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 198 treesize of output 1 [2022-11-20 20:03:26,541 INFO L321 Elim1Store]: treesize reduction 8, result has 90.6 percent of original size [2022-11-20 20:03:26,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 146 [2022-11-20 20:03:26,679 INFO L321 Elim1Store]: treesize reduction 24, result has 68.0 percent of original size [2022-11-20 20:03:26,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 137 [2022-11-20 20:03:52,547 INFO L321 Elim1Store]: treesize reduction 45, result has 2.2 percent of original size [2022-11-20 20:03:52,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 194 treesize of output 1 [2022-11-20 20:03:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 20:03:52,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517059497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:52,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1614891569] [2022-11-20 20:03:52,884 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 20:03:52,884 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:03:52,884 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:03:52,884 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:03:52,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:03:52,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:52,961 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 20:03:52,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-20 20:03:52,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,043 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 20:03:53,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-20 20:03:53,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 20:03:53,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:03:53,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-20 20:03:53,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:03:53,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:03:53,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-20 20:03:53,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-20 20:03:53,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:53,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-20 20:04:02,864 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 145 for LOIs [2022-11-20 20:04:03,111 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 32 for LOIs [2022-11-20 20:04:04,258 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-20 20:04:04,295 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 20:04:04,311 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 20:04:04,371 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:04:26,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9277#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 16) 0) (not (= 3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 8) 0) (not (= 4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|)) (not (= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|)) (not (= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 24)) 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 24) 0) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 24)) (= (select |#valid| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 1) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 24)) 0) 16) (= (select |#length| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|) 32) (< |#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_177|))) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$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) (= 40 (select |#length| 4)) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:04:26,645 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:04:26,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:04:26,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25, 20] total 56 [2022-11-20 20:04:26,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553185366] [2022-11-20 20:04:26,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:04:26,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 20:04:26,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:04:26,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 20:04:26,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=6527, Unknown=8, NotChecked=0, Total=6972 [2022-11-20 20:04:26,649 INFO L87 Difference]: Start difference. First operand 189 states and 249 transitions. Second operand has 56 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 47 states have internal predecessors, (100), 18 states have call successors, (30), 4 states have call predecessors, (30), 15 states have return successors, (28), 16 states have call predecessors, (28), 16 states have call successors, (28) [2022-11-20 20:04:38,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:04:38,320 INFO L93 Difference]: Finished difference Result 450 states and 703 transitions. [2022-11-20 20:04:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-20 20:04:38,321 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 47 states have internal predecessors, (100), 18 states have call successors, (30), 4 states have call predecessors, (30), 15 states have return successors, (28), 16 states have call predecessors, (28), 16 states have call successors, (28) Word has length 67 [2022-11-20 20:04:38,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:04:38,323 INFO L225 Difference]: With dead ends: 450 [2022-11-20 20:04:38,323 INFO L226 Difference]: Without dead ends: 366 [2022-11-20 20:04:38,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5165 ImplicationChecksByTransitivity, 57.4s TimeCoverageRelationStatistics Valid=1348, Invalid=17550, Unknown=8, NotChecked=0, Total=18906 [2022-11-20 20:04:38,328 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 417 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 3545 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 4394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 3545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:04:38,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 973 Invalid, 4394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 3545 Invalid, 0 Unknown, 379 Unchecked, 4.6s Time] [2022-11-20 20:04:38,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-11-20 20:04:38,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 241. [2022-11-20 20:04:38,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 156 states have (on average 1.1474358974358974) internal successors, (179), 164 states have internal predecessors, (179), 58 states have call successors, (58), 21 states have call predecessors, (58), 26 states have return successors, (78), 55 states have call predecessors, (78), 57 states have call successors, (78) [2022-11-20 20:04:38,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 315 transitions. [2022-11-20 20:04:38,488 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 315 transitions. Word has length 67 [2022-11-20 20:04:38,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:04:38,489 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 315 transitions. [2022-11-20 20:04:38,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 47 states have internal predecessors, (100), 18 states have call successors, (30), 4 states have call predecessors, (30), 15 states have return successors, (28), 16 states have call predecessors, (28), 16 states have call successors, (28) [2022-11-20 20:04:38,490 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 315 transitions. [2022-11-20 20:04:38,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-20 20:04:38,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:04:38,491 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 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] [2022-11-20 20:04:38,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 20:04:38,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 20:04:38,698 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:04:38,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:04:38,698 INFO L85 PathProgramCache]: Analyzing trace with hash 657787791, now seen corresponding path program 2 times [2022-11-20 20:04:38,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:04:38,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611446400] [2022-11-20 20:04:38,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:04:38,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:04:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:04:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 39 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 20:04:40,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:04:40,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611446400] [2022-11-20 20:04:40,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611446400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:04:40,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855125736] [2022-11-20 20:04:40,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:04:40,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:04:40,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:04:40,635 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:04:40,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 20:04:41,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:04:41,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:04:41,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-20 20:04:41,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:04:41,094 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 20:04:41,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-20 20:04:41,111 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 20:04:41,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-20 20:05:06,372 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:05:08,411 WARN L859 $PredicateComparison]: unable to prove that (and (or (= |c_aws_linked_list_node_next_is_valid_#res| 1) (= |c_aws_linked_list_node_next_is_valid_#res| 0)) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_71| Int)) (and (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_71|) 0) 16) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_71|) 0) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_71|))) (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_60| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_72| Int)) (let ((.cse2 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_72|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_60|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_72|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_60|)) (.cse1 (+ .cse2 8))) (and (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_72| (select (select |c_#memory_$Pointer$.base| .cse0) .cse1)) (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_60| (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1)) (not (= .cse2 (+ 16 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_60|))))))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_60| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_72| Int)) (let ((.cse4 (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_72|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_60|) 8)) (.cse3 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_72|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_60|))) (and (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_72| (select (select |c_#memory_$Pointer$.base| .cse3) .cse4)) (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_60| (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4)) (not (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_72| .cse3))))))) is different from true [2022-11-20 20:05:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 56 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 1 not checked. [2022-11-20 20:05:17,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:05:21,886 WARN L837 $PredicateComparison]: unable to prove that (or (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)) (.cse1 (+ 8 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)))) (and (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1)) (= (select (select |c_#memory_$Pointer$.base| .cse0) .cse1) |c_aws_linked_list_node_next_is_valid_#in~node.base|))) (and (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_62| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_74| Int)) (or (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_74|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_62|) (+ 16 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_62|))) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_74|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_62|) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_74|)))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_62| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_74| Int)) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_74|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_62|)) (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_74|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_62|) 8)) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_74|)) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_62| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_74| Int)) (= (select (select |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_74|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_62|)) (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_74|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_62|) 8)) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_62|))) (= (mod |c_aws_linked_list_node_next_is_valid_#res| 256) 0)) is different from false [2022-11-20 20:05:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 36 proven. 23 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 20:05:23,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855125736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:05:23,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [219395540] [2022-11-20 20:05:23,068 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 20:05:23,069 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:05:23,069 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:05:23,069 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:05:23,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:05:23,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,141 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 20:05:23,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-20 20:05:23,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-20 20:05:23,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:05:23,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 20:05:23,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:05:23,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-20 20:05:23,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:05:23,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:05:23,531 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 20:05:23,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-20 20:05:23,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-20 20:05:23,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:05:23,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,690 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 20:05:23,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-20 20:05:23,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-20 20:05:23,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-20 20:05:23,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:05:23,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 20:05:23,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:05:23,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-20 20:05:23,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-20 20:05:23,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-20 20:05:23,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:05:23,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:23,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 20:05:24,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:05:24,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:24,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-20 20:05:24,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:24,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-20 20:05:24,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:24,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-20 20:05:24,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:05:24,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:05:24,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:24,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:05:24,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:24,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 20:05:24,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:24,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:05:24,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:24,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:05:24,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-20 20:05:25,458 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 19 for LOIs [2022-11-20 20:05:25,464 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 34 for LOIs [2022-11-20 20:05:26,631 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-20 20:05:26,668 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 20:05:26,684 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 20:05:26,742 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:05:36,119 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10966#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:05:36,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:05:36,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:05:36,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 22, 16] total 45 [2022-11-20 20:05:36,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246162972] [2022-11-20 20:05:36,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:05:36,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 20:05:36,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:05:36,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 20:05:36,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=4628, Unknown=11, NotChecked=278, Total=5256 [2022-11-20 20:05:36,123 INFO L87 Difference]: Start difference. First operand 241 states and 315 transitions. Second operand has 45 states, 40 states have (on average 2.475) internal successors, (99), 40 states have internal predecessors, (99), 17 states have call successors, (31), 4 states have call predecessors, (31), 10 states have return successors, (30), 14 states have call predecessors, (30), 17 states have call successors, (30) [2022-11-20 20:06:14,691 WARN L233 SmtUtils]: Spent 24.04s on a formula simplification. DAG size of input: 86 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:06:18,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:06:18,705 INFO L93 Difference]: Finished difference Result 408 states and 544 transitions. [2022-11-20 20:06:18,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 20:06:18,706 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 2.475) internal successors, (99), 40 states have internal predecessors, (99), 17 states have call successors, (31), 4 states have call predecessors, (31), 10 states have return successors, (30), 14 states have call predecessors, (30), 17 states have call successors, (30) Word has length 75 [2022-11-20 20:06:18,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:06:18,708 INFO L225 Difference]: With dead ends: 408 [2022-11-20 20:06:18,708 INFO L226 Difference]: Without dead ends: 272 [2022-11-20 20:06:18,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 167 SyntacticMatches, 10 SemanticMatches, 89 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 2817 ImplicationChecksByTransitivity, 88.8s TimeCoverageRelationStatistics Valid=537, Invalid=7286, Unknown=17, NotChecked=350, Total=8190 [2022-11-20 20:06:18,711 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 145 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 2129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 582 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:06:18,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 914 Invalid, 2129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1356 Invalid, 0 Unknown, 582 Unchecked, 2.2s Time] [2022-11-20 20:06:18,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-20 20:06:18,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 229. [2022-11-20 20:06:18,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 149 states have (on average 1.1409395973154361) internal successors, (170), 157 states have internal predecessors, (170), 54 states have call successors, (54), 21 states have call predecessors, (54), 25 states have return successors, (68), 50 states have call predecessors, (68), 53 states have call successors, (68) [2022-11-20 20:06:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 292 transitions. [2022-11-20 20:06:18,843 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 292 transitions. Word has length 75 [2022-11-20 20:06:18,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:06:18,844 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 292 transitions. [2022-11-20 20:06:18,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 2.475) internal successors, (99), 40 states have internal predecessors, (99), 17 states have call successors, (31), 4 states have call predecessors, (31), 10 states have return successors, (30), 14 states have call predecessors, (30), 17 states have call successors, (30) [2022-11-20 20:06:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 292 transitions. [2022-11-20 20:06:18,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-20 20:06:18,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:06:18,846 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] [2022-11-20 20:06:18,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 20:06:19,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 20:06:19,048 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:06:19,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:06:19,048 INFO L85 PathProgramCache]: Analyzing trace with hash -752805035, now seen corresponding path program 1 times [2022-11-20 20:06:19,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:06:19,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501412946] [2022-11-20 20:06:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:06:19,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:06:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:06:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 20:06:20,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:06:20,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501412946] [2022-11-20 20:06:20,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501412946] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:06:20,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584191305] [2022-11-20 20:06:20,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:06:20,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:06:20,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:06:20,560 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:06:20,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 20:06:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:06:21,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-20 20:06:21,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:06:46,506 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:06:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 20:06:46,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:06:47,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:06:47,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2022-11-20 20:06:47,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:06:47,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 27 [2022-11-20 20:06:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 20:06:47,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584191305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:06:47,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2142554659] [2022-11-20 20:06:47,974 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 20:06:47,974 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:06:47,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:06:47,975 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:06:47,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:06:48,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,050 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 20:06:48,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-20 20:06:48,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,116 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 20:06:48,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-20 20:06:48,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:06:48,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-20 20:06:48,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:06:48,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 20:06:48,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:06:48,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-20 20:06:48,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-20 20:06:48,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:06:48,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-20 20:06:57,959 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 145 for LOIs [2022-11-20 20:06:58,176 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-20 20:06:58,847 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-20 20:06:58,884 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 20:06:58,899 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 20:06:58,973 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:07:20,829 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12469#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|) 16) 0) (= 16 (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|) 24)) 0)) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|) 24)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|) 24) 0) (<= 0 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|) 24)) 0) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|) 8) 0) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|) 1) (= (select |#length| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|) 32) (not (= 4 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|) 8) 0) (not (= 0 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|) 24) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_98|))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:07:20,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:07:20,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:07:20,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 14] total 37 [2022-11-20 20:07:20,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288165022] [2022-11-20 20:07:20,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:07:20,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 20:07:20,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:07:20,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 20:07:20,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=3767, Unknown=7, NotChecked=0, Total=4160 [2022-11-20 20:07:20,833 INFO L87 Difference]: Start difference. First operand 229 states and 292 transitions. Second operand has 37 states, 36 states have (on average 3.0) internal successors, (108), 33 states have internal predecessors, (108), 19 states have call successors, (32), 4 states have call predecessors, (32), 9 states have return successors, (31), 19 states have call predecessors, (31), 18 states have call successors, (31) [2022-11-20 20:07:48,602 WARN L233 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:07:54,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:07:54,454 INFO L93 Difference]: Finished difference Result 487 states and 653 transitions. [2022-11-20 20:07:54,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 20:07:54,454 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.0) internal successors, (108), 33 states have internal predecessors, (108), 19 states have call successors, (32), 4 states have call predecessors, (32), 9 states have return successors, (31), 19 states have call predecessors, (31), 18 states have call successors, (31) Word has length 75 [2022-11-20 20:07:54,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:07:54,457 INFO L225 Difference]: With dead ends: 487 [2022-11-20 20:07:54,457 INFO L226 Difference]: Without dead ends: 363 [2022-11-20 20:07:54,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 181 SyntacticMatches, 11 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2581 ImplicationChecksByTransitivity, 79.6s TimeCoverageRelationStatistics Valid=699, Invalid=7117, Unknown=16, NotChecked=0, Total=7832 [2022-11-20 20:07:54,459 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 168 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 415 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:07:54,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1133 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1252 Invalid, 0 Unknown, 415 Unchecked, 1.5s Time] [2022-11-20 20:07:54,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-11-20 20:07:54,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 278. [2022-11-20 20:07:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 184 states have (on average 1.125) internal successors, (207), 193 states have internal predecessors, (207), 60 states have call successors, (60), 28 states have call predecessors, (60), 33 states have return successors, (75), 56 states have call predecessors, (75), 59 states have call successors, (75) [2022-11-20 20:07:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 342 transitions. [2022-11-20 20:07:54,612 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 342 transitions. Word has length 75 [2022-11-20 20:07:54,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:07:54,613 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 342 transitions. [2022-11-20 20:07:54,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.0) internal successors, (108), 33 states have internal predecessors, (108), 19 states have call successors, (32), 4 states have call predecessors, (32), 9 states have return successors, (31), 19 states have call predecessors, (31), 18 states have call successors, (31) [2022-11-20 20:07:54,613 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 342 transitions. [2022-11-20 20:07:54,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-20 20:07:54,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:07:54,614 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] [2022-11-20 20:07:54,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 20:07:54,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 20:07:54,815 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:07:54,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:07:54,816 INFO L85 PathProgramCache]: Analyzing trace with hash -79775404, now seen corresponding path program 1 times [2022-11-20 20:07:54,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:07:54,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655728678] [2022-11-20 20:07:54,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:07:54,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:07:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:07:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-20 20:07:55,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:07:55,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655728678] [2022-11-20 20:07:55,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655728678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:07:55,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:07:55,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:07:55,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186182850] [2022-11-20 20:07:55,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:07:55,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:07:55,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:07:55,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:07:55,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:07:55,119 INFO L87 Difference]: Start difference. First operand 278 states and 342 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) [2022-11-20 20:07:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:07:55,398 INFO L93 Difference]: Finished difference Result 284 states and 347 transitions. [2022-11-20 20:07:55,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:07:55,398 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 [2022-11-20 20:07:55,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:07:55,400 INFO L225 Difference]: With dead ends: 284 [2022-11-20 20:07:55,400 INFO L226 Difference]: Without dead ends: 282 [2022-11-20 20:07:55,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:07:55,402 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:07:55,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 161 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:07:55,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-20 20:07:55,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2022-11-20 20:07:55,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 187 states have (on average 1.1229946524064172) internal successors, (210), 196 states have internal predecessors, (210), 60 states have call successors, (60), 29 states have call predecessors, (60), 34 states have return successors, (75), 56 states have call predecessors, (75), 59 states have call successors, (75) [2022-11-20 20:07:55,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 345 transitions. [2022-11-20 20:07:55,584 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 345 transitions. Word has length 76 [2022-11-20 20:07:55,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:07:55,584 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 345 transitions. [2022-11-20 20:07:55,584 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) [2022-11-20 20:07:55,584 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 345 transitions. [2022-11-20 20:07:55,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-20 20:07:55,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:07:55,585 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 4, 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] [2022-11-20 20:07:55,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 20:07:55,585 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:07:55,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:07:55,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1808193970, now seen corresponding path program 3 times [2022-11-20 20:07:55,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:07:55,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699808741] [2022-11-20 20:07:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:07:55,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:07:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:07:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 20:07:58,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:07:58,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699808741] [2022-11-20 20:07:58,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699808741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:07:58,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473860040] [2022-11-20 20:07:58,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:07:58,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:07:58,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:07:58,255 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:07:58,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 20:07:58,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:07:58,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:07:58,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-20 20:07:58,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:07:58,791 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 20:07:58,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-20 20:07:58,808 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 20:07:58,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-20 20:08:24,035 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:08:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 77 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:08:26,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:08:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 6 proven. 68 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 20:08:27,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473860040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:08:27,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809115574] [2022-11-20 20:08:27,626 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 20:08:27,626 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:08:27,626 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:08:27,626 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:08:27,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:08:27,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:27,711 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 20:08:27,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-20 20:08:27,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:27,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-20 20:08:27,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-20 20:08:27,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:27,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:27,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:27,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:27,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:27,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:08:27,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:27,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 20:08:27,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:27,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:27,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:28,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:28,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:28,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:08:28,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:08:28,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:28,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:28,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:28,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:28,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:28,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-20 20:08:28,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:28,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:28,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:28,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:28,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:28,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:28,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:28,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:28,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-20 20:08:28,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:28,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:08:28,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-20 20:08:37,337 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 145 for LOIs [2022-11-20 20:08:37,538 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 17 for LOIs [2022-11-20 20:08:38,070 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-20 20:08:38,111 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 20:08:38,127 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 20:08:38,188 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:08:59,920 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15052#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= |~#s_can_fail_allocator_static~0.base| 4) (<= 0 |__VERIFIER_assert_#in~cond|) (<= 0 |#NULL.base|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 4 |~#s_can_fail_allocator_static~0.base|) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (<= |#NULL.offset| 0) (= (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290| Int)) (and (not (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290| 4)) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290|) 1) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290|) 16) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290|) 8) 0) (not (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290| 0)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290|) 24)) 0) 16) (<= 0 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290|) (not (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290| 3)) (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290|) 24)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290|) 24) 0) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290|)) (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290|) 24)) 0)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290|) 8) 0) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290|) 24)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290| 2)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290|) 16) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_290|))) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$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) (= 40 (select |#length| 4)) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-11-20 20:08:59,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:08:59,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:08:59,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 14] total 43 [2022-11-20 20:08:59,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986430064] [2022-11-20 20:08:59,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:08:59,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 20:08:59,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:08:59,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 20:08:59,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=4521, Unknown=7, NotChecked=0, Total=4970 [2022-11-20 20:08:59,923 INFO L87 Difference]: Start difference. First operand 282 states and 345 transitions. Second operand has 43 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 40 states have internal predecessors, (117), 23 states have call successors, (33), 4 states have call predecessors, (33), 9 states have return successors, (32), 17 states have call predecessors, (32), 23 states have call successors, (32) [2022-11-20 20:09:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:14,972 INFO L93 Difference]: Finished difference Result 471 states and 574 transitions. [2022-11-20 20:09:14,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 20:09:14,973 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 40 states have internal predecessors, (117), 23 states have call successors, (33), 4 states have call predecessors, (33), 9 states have return successors, (32), 17 states have call predecessors, (32), 23 states have call successors, (32) Word has length 79 [2022-11-20 20:09:14,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:14,975 INFO L225 Difference]: With dead ends: 471 [2022-11-20 20:09:14,975 INFO L226 Difference]: Without dead ends: 277 [2022-11-20 20:09:14,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 197 SyntacticMatches, 8 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3077 ImplicationChecksByTransitivity, 62.1s TimeCoverageRelationStatistics Valid=871, Invalid=8819, Unknown=12, NotChecked=0, Total=9702 [2022-11-20 20:09:14,978 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 305 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 1909 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:14,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 1067 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1909 Invalid, 0 Unknown, 305 Unchecked, 2.6s Time] [2022-11-20 20:09:14,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-20 20:09:15,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 220. [2022-11-20 20:09:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 151 states have (on average 1.086092715231788) internal successors, (164), 156 states have internal predecessors, (164), 41 states have call successors, (41), 25 states have call predecessors, (41), 27 states have return successors, (48), 38 states have call predecessors, (48), 40 states have call successors, (48) [2022-11-20 20:09:15,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 253 transitions. [2022-11-20 20:09:15,111 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 253 transitions. Word has length 79 [2022-11-20 20:09:15,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:15,112 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 253 transitions. [2022-11-20 20:09:15,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 40 states have internal predecessors, (117), 23 states have call successors, (33), 4 states have call predecessors, (33), 9 states have return successors, (32), 17 states have call predecessors, (32), 23 states have call successors, (32) [2022-11-20 20:09:15,112 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 253 transitions. [2022-11-20 20:09:15,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-20 20:09:15,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:15,114 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] [2022-11-20 20:09:15,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 20:09:15,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 20:09:15,322 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:09:15,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:15,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1751529687, now seen corresponding path program 1 times [2022-11-20 20:09:15,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:09:15,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257258491] [2022-11-20 20:09:15,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:09:15,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:09:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:09:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-20 20:09:15,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:09:15,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257258491] [2022-11-20 20:09:15,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257258491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:09:15,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:09:15,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:09:15,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160327932] [2022-11-20 20:09:15,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:09:15,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:09:15,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:09:15,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:09:15,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:09:15,789 INFO L87 Difference]: Start difference. First operand 220 states and 253 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 20:09:16,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:09:16,202 INFO L93 Difference]: Finished difference Result 226 states and 258 transitions. [2022-11-20 20:09:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:09:16,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 82 [2022-11-20 20:09:16,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:09:16,203 INFO L225 Difference]: With dead ends: 226 [2022-11-20 20:09:16,203 INFO L226 Difference]: Without dead ends: 224 [2022-11-20 20:09:16,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:09:16,204 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 9 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:09:16,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 208 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:09:16,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-20 20:09:16,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-11-20 20:09:16,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 154 states have (on average 1.0844155844155845) internal successors, (167), 159 states have internal predecessors, (167), 41 states have call successors, (41), 26 states have call predecessors, (41), 28 states have return successors, (48), 38 states have call predecessors, (48), 40 states have call successors, (48) [2022-11-20 20:09:16,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 256 transitions. [2022-11-20 20:09:16,342 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 256 transitions. Word has length 82 [2022-11-20 20:09:16,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:09:16,343 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 256 transitions. [2022-11-20 20:09:16,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 20:09:16,343 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 256 transitions. [2022-11-20 20:09:16,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-20 20:09:16,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:09:16,345 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] [2022-11-20 20:09:16,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 20:09:16,345 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:09:16,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:09:16,346 INFO L85 PathProgramCache]: Analyzing trace with hash -400229854, now seen corresponding path program 3 times [2022-11-20 20:09:16,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:09:16,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144888032] [2022-11-20 20:09:16,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:09:16,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:09:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:09:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 7 proven. 101 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 20:09:23,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:09:23,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144888032] [2022-11-20 20:09:23,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144888032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:09:23,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699966678] [2022-11-20 20:09:23,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:09:23,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:09:23,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:09:23,328 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:09:23,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 20:09:23,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:09:23,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:09:23,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 175 conjunts are in the unsatisfiable core [2022-11-20 20:09:23,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:09:24,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-20 20:09:24,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:24,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 20:09:24,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:24,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:24,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 21 [2022-11-20 20:09:24,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:24,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-11-20 20:09:24,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:24,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-20 20:09:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 34 proven. 94 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 20:09:33,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:09:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 6 proven. 107 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 20:09:56,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699966678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:09:56,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [985469676] [2022-11-20 20:09:56,516 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 20:09:56,516 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:09:56,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:09:56,517 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:09:56,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:09:56,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:56,604 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 20:09:56,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-20 20:09:56,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:56,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-20 20:09:56,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:56,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:56,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:56,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:56,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:56,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:09:56,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-20 20:09:56,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:56,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:56,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:56,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:56,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:56,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 20:09:56,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:56,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 20:09:56,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:56,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,034 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-20 20:09:57,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-20 20:09:57,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,143 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 20:09:57,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-20 20:09:57,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-20 20:09:57,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:09:57,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-20 20:09:57,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:09:57,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-20 20:09:57,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:09:57,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:09:57,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:09:57,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:09:57,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:57,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:09:57,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:09:58,070 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-20 20:09:58,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 662 treesize of output 671 [2022-11-20 20:09:58,412 INFO L321 Elim1Store]: treesize reduction 152, result has 18.7 percent of original size [2022-11-20 20:09:58,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 641 treesize of output 652 [2022-11-20 20:09:58,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:09:58,502 INFO L321 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-20 20:09:58,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 660 treesize of output 631 [2022-11-20 20:09:58,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:58,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:58,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 652 treesize of output 631 [2022-11-20 20:09:58,880 INFO L321 Elim1Store]: treesize reduction 208, result has 17.1 percent of original size [2022-11-20 20:09:58,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 644 treesize of output 662 [2022-11-20 20:09:58,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:09:58,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:58,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:09:58,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:09:58,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:58,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:58,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:58,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:09:58,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:09:59,181 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-20 20:09:59,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 672 treesize of output 681 [2022-11-20 20:09:59,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:09:59,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-20 20:10:06,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:10:06,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:10:06,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 20:10:06,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:10:06,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:10:06,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-20 20:10:06,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:10:06,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-20 20:10:06,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:10:06,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-20 20:10:06,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:10:06,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:10:06,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:10:06,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:10:06,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 20:10:06,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:10:06,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 20:10:06,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:10:06,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:10:06,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-20 20:10:07,901 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 54 for LOIs [2022-11-20 20:10:07,973 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2022-11-20 20:10:08,688 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 134 for LOIs [2022-11-20 20:10:08,736 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 20:10:08,755 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 20:10:08,824 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:10:27,421 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17424#(and (<= |~#s_can_fail_allocator_static~0.base| 4) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (<= 4 |~#s_can_fail_allocator_static~0.base|) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_267| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_271| Int)) (and (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_271|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_267| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_271|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_267| 24))) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_267| 16)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_267|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_267| 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_271|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_271|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_267| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_271|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_267| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_271|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_271|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_267| 24))) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_271|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_267| 24)) 0))) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-11-20 20:10:27,421 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:10:27,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:10:27,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 34, 31] total 89 [2022-11-20 20:10:27,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509537628] [2022-11-20 20:10:27,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:10:27,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-20 20:10:27,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:10:27,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-20 20:10:27,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=12975, Unknown=0, NotChecked=0, Total=13572 [2022-11-20 20:10:27,425 INFO L87 Difference]: Start difference. First operand 224 states and 256 transitions. Second operand has 89 states, 75 states have (on average 2.0) internal successors, (150), 78 states have internal predecessors, (150), 32 states have call successors, (40), 4 states have call predecessors, (40), 20 states have return successors, (39), 30 states have call predecessors, (39), 31 states have call successors, (39) [2022-11-20 20:10:56,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:10:56,701 INFO L93 Difference]: Finished difference Result 454 states and 610 transitions. [2022-11-20 20:10:56,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-20 20:10:56,702 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 75 states have (on average 2.0) internal successors, (150), 78 states have internal predecessors, (150), 32 states have call successors, (40), 4 states have call predecessors, (40), 20 states have return successors, (39), 30 states have call predecessors, (39), 31 states have call successors, (39) Word has length 86 [2022-11-20 20:10:56,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:10:56,705 INFO L225 Difference]: With dead ends: 454 [2022-11-20 20:10:56,705 INFO L226 Difference]: Without dead ends: 395 [2022-11-20 20:10:56,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 174 SyntacticMatches, 11 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10843 ImplicationChecksByTransitivity, 55.5s TimeCoverageRelationStatistics Valid=1835, Invalid=32575, Unknown=0, NotChecked=0, Total=34410 [2022-11-20 20:10:56,709 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 241 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 3561 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 4574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 927 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:10:56,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 1822 Invalid, 4574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3561 Invalid, 0 Unknown, 927 Unchecked, 7.4s Time] [2022-11-20 20:10:56,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-11-20 20:10:56,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 313. [2022-11-20 20:10:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 215 states have (on average 1.1348837209302325) internal successors, (244), 227 states have internal predecessors, (244), 58 states have call successors, (58), 30 states have call predecessors, (58), 39 states have return successors, (88), 55 states have call predecessors, (88), 57 states have call successors, (88) [2022-11-20 20:10:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 390 transitions. [2022-11-20 20:10:56,956 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 390 transitions. Word has length 86 [2022-11-20 20:10:56,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:10:56,957 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 390 transitions. [2022-11-20 20:10:56,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 75 states have (on average 2.0) internal successors, (150), 78 states have internal predecessors, (150), 32 states have call successors, (40), 4 states have call predecessors, (40), 20 states have return successors, (39), 30 states have call predecessors, (39), 31 states have call successors, (39) [2022-11-20 20:10:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 390 transitions. [2022-11-20 20:10:56,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 20:10:56,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:10:56,959 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 6, 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] [2022-11-20 20:10:56,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 20:10:57,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:10:57,177 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:10:57,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:10:57,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1526323144, now seen corresponding path program 1 times [2022-11-20 20:10:57,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:10:57,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405861712] [2022-11-20 20:10:57,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:10:57,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:10:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:10:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 29 proven. 73 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-20 20:10:58,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:10:58,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405861712] [2022-11-20 20:10:58,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405861712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:10:58,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396214046] [2022-11-20 20:10:58,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:10:58,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:10:58,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:10:58,330 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:10:58,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37af9793-19f6-4dec-be91-78b0d0c9da2b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 20:10:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:10:58,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-20 20:10:58,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:10:59,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-20 20:10:59,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:10:59,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 20:10:59,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-20 20:10:59,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:10:59,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 20:10:59,183 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-20 20:10:59,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 126 [2022-11-20 20:10:59,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:10:59,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 94 [2022-11-20 20:10:59,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:10:59,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:10:59,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 36 [2022-11-20 20:10:59,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:10:59,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-11-20 20:10:59,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-20 20:10:59,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-20 20:10:59,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:10:59,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 23 [2022-11-20 20:10:59,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:10:59,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:10:59,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-11-20 20:11:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 46 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-20 20:11:01,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:11:02,171 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:11:02,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 115 [2022-11-20 20:11:02,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:11:02,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1483 treesize of output 1365 [2022-11-20 20:11:02,219 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:11:02,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1334 treesize of output 959 [2022-11-20 20:11:02,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:11:02,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 31887 treesize of output 29585 [2022-11-20 20:11:02,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:11:02,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 40758 treesize of output 38511 [2022-11-20 20:11:03,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:11:03,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 44911 treesize of output 43237 [2022-11-20 20:11:06,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47663 treesize of output 46883 [2022-11-20 20:11:06,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46799 treesize of output 46145