./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:43:09,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:43:09,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:43:09,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:43:09,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:43:09,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:43:09,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:43:09,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:43:09,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:43:09,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:43:09,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:43:09,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:43:09,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:43:09,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:43:09,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:43:09,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:43:09,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:43:09,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:43:09,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:43:09,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:43:09,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:43:09,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:43:09,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:43:09,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:43:09,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:43:09,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:43:09,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:43:09,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:43:09,470 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:43:09,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:43:09,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:43:09,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:43:09,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:43:09,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:43:09,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:43:09,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:43:09,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:43:09,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:43:09,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:43:09,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:43:09,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:43:09,484 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:43:09,517 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:43:09,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:43:09,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:43:09,519 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:43:09,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:43:09,520 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:43:09,520 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:43:09,520 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:43:09,521 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:43:09,521 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:43:09,521 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:43:09,522 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:43:09,522 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:43:09,522 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:43:09,523 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:43:09,523 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:43:09,523 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:43:09,524 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:43:09,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:43:09,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:43:09,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:43:09,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:43:09,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:43:09,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:43:09,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:43:09,527 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:43:09,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:43:09,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:43:09,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:43:09,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:43:09,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:43:09,529 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:43:09,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:43:09,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:43:09,530 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:43:09,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:43:09,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:43:09,531 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:43:09,531 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_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 [2022-11-19 07:43:09,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:43:09,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:43:09,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:43:09,869 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:43:09,870 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:43:09,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2022-11-19 07:43:09,965 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/data/116e338d5/5b26e3d9cd644b59a59976ca163ce04c/FLAGccc2e37dd [2022-11-19 07:43:10,738 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:43:10,739 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2022-11-19 07:43:10,777 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/data/116e338d5/5b26e3d9cd644b59a59976ca163ce04c/FLAGccc2e37dd [2022-11-19 07:43:10,850 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/data/116e338d5/5b26e3d9cd644b59a59976ca163ce04c [2022-11-19 07:43:10,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:43:10,858 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:43:10,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:43:10,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:43:10,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:43:10,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:43:10" (1/1) ... [2022-11-19 07:43:10,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@557c54a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:10, skipping insertion in model container [2022-11-19 07:43:10,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:43:10" (1/1) ... [2022-11-19 07:43:10,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:43:11,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:43:11,379 WARN L234 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_e6d9b428-054a-4236-a69c-1bbe5926623e/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2022-11-19 07:43:11,388 WARN L234 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_e6d9b428-054a-4236-a69c-1bbe5926623e/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2022-11-19 07:43:12,610 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:12,617 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:12,618 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:12,621 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:12,624 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:12,653 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:12,654 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:12,657 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:12,658 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:12,660 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:12,662 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:12,663 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:12,664 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:13,087 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 07:43:13,089 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 07:43:13,091 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 07:43:13,092 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 07:43:13,094 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 07:43:13,095 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 07:43:13,096 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 07:43:13,097 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 07:43:13,098 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 07:43:13,099 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 07:43:13,292 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-19 07:43:13,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:43:13,358 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:43:13,388 WARN L234 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_e6d9b428-054a-4236-a69c-1bbe5926623e/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2022-11-19 07:43:13,396 WARN L234 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_e6d9b428-054a-4236-a69c-1bbe5926623e/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2022-11-19 07:43:13,499 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:13,499 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:13,500 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:13,501 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:13,501 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:13,510 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:13,511 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:13,512 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:13,513 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:13,514 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:13,515 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:13,516 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:13,517 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:43:13,577 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 07:43:13,578 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 07:43:13,579 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 07:43:13,580 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 07:43:13,582 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 07:43:13,582 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 07:43:13,583 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 07:43:13,584 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 07:43:13,585 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 07:43:13,585 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 07:43:13,613 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-19 07:43:13,640 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:43:13,849 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:43:13,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:13 WrapperNode [2022-11-19 07:43:13,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:43:13,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:43:13,852 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:43:13,852 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:43:13,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:13" (1/1) ... [2022-11-19 07:43:13,949 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:13" (1/1) ... [2022-11-19 07:43:14,037 INFO L138 Inliner]: procedures = 679, calls = 1039, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 135 [2022-11-19 07:43:14,037 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:43:14,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:43:14,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:43:14,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:43:14,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:13" (1/1) ... [2022-11-19 07:43:14,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:13" (1/1) ... [2022-11-19 07:43:14,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:13" (1/1) ... [2022-11-19 07:43:14,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:13" (1/1) ... [2022-11-19 07:43:14,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:13" (1/1) ... [2022-11-19 07:43:14,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:13" (1/1) ... [2022-11-19 07:43:14,142 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:13" (1/1) ... [2022-11-19 07:43:14,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:13" (1/1) ... [2022-11-19 07:43:14,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:43:14,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:43:14,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:43:14,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:43:14,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:13" (1/1) ... [2022-11-19 07:43:14,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:43:14,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:43:14,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:43:14,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:43:14,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:43:14,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 07:43:14,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 07:43:14,292 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-19 07:43:14,292 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-19 07:43:14,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:43:14,293 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-19 07:43:14,293 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-19 07:43:14,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:43:14,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:43:14,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:43:14,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:43:14,295 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:43:14,295 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:43:14,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:43:14,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:43:14,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:43:14,296 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-19 07:43:14,296 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-19 07:43:14,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:43:14,585 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:43:14,588 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:43:14,944 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:43:15,322 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:43:15,323 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:43:15,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:43:15 BoogieIcfgContainer [2022-11-19 07:43:15,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:43:15,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:43:15,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:43:15,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:43:15,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:43:10" (1/3) ... [2022-11-19 07:43:15,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4555a980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:43:15, skipping insertion in model container [2022-11-19 07:43:15,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:43:13" (2/3) ... [2022-11-19 07:43:15,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4555a980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:43:15, skipping insertion in model container [2022-11-19 07:43:15,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:43:15" (3/3) ... [2022-11-19 07:43:15,353 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_end_harness.i [2022-11-19 07:43:15,377 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:43:15,378 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:43:15,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:43:15,514 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;@16979279, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:43:15,515 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:43:15,522 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) [2022-11-19 07:43:15,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 07:43:15,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:15,539 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] [2022-11-19 07:43:15,541 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:15,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:15,550 INFO L85 PathProgramCache]: Analyzing trace with hash -901301471, now seen corresponding path program 1 times [2022-11-19 07:43:15,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:43:15,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033744959] [2022-11-19 07:43:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:15,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:43:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:43:16,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:43:16,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033744959] [2022-11-19 07:43:16,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033744959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:43:16,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568172530] [2022-11-19 07:43:16,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:16,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:16,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:43:16,589 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:43:16,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:43:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:16,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-19 07:43:16,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:17,191 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 [2022-11-19 07:43:17,216 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 [2022-11-19 07:43:17,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:17,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:17,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:17,373 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 [2022-11-19 07:43:17,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:17,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:17,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:17,408 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 [2022-11-19 07:43:20,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:20,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:20,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:20,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:20,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:20,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:20,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:20,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:20,388 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-19 07:43:20,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 8 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 132 treesize of output 78 [2022-11-19 07:43:20,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:20,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:20,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:20,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:20,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:20,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:20,421 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-19 07:43:20,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 73 treesize of output 31 [2022-11-19 07:43:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:43:20,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:43:20,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568172530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:43:20,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:43:20,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-11-19 07:43:20,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544341280] [2022-11-19 07:43:20,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:43:20,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:43:20,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:43:20,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:43:20,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:43:20,478 INFO L87 Difference]: Start difference. First operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 07:43:21,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:43:21,159 INFO L93 Difference]: Finished difference Result 115 states and 170 transitions. [2022-11-19 07:43:21,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:43:21,162 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2022-11-19 07:43:21,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:43:21,173 INFO L225 Difference]: With dead ends: 115 [2022-11-19 07:43:21,174 INFO L226 Difference]: Without dead ends: 77 [2022-11-19 07:43:21,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:43:21,182 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 17 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:43:21,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 249 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 121 Invalid, 0 Unknown, 60 Unchecked, 0.4s Time] [2022-11-19 07:43:21,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-19 07:43:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2022-11-19 07:43:21,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-11-19 07:43:21,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2022-11-19 07:43:21,246 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 37 [2022-11-19 07:43:21,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:43:21,247 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2022-11-19 07:43:21,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 07:43:21,248 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2022-11-19 07:43:21,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 07:43:21,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:21,251 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] [2022-11-19 07:43:21,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:43:21,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:21,460 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:21,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:21,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2094600787, now seen corresponding path program 1 times [2022-11-19 07:43:21,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:43:21,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106320782] [2022-11-19 07:43:21,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:21,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:43:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:43:21,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:43:21,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106320782] [2022-11-19 07:43:21,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106320782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:43:21,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971971046] [2022-11-19 07:43:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:21,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:21,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:43:21,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:43:21,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:43:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:22,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-19 07:43:22,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:22,266 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 [2022-11-19 07:43:22,286 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 [2022-11-19 07:43:22,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:22,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:22,384 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 [2022-11-19 07:43:22,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:22,394 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 [2022-11-19 07:43:22,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:22,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:22,428 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 [2022-11-19 07:43:22,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:22,437 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 [2022-11-19 07:43:22,580 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-19 07:43:22,581 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 [2022-11-19 07:43:22,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:22,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:22,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:22,597 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 [2022-11-19 07:43:22,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:22,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:22,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 39 [2022-11-19 07:43:22,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:22,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:22,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:22,630 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 [2022-11-19 07:43:22,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-19 07:43:22,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:22,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 21 [2022-11-19 07:43:22,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:43:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:43:25,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:43:31,832 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 8)) (.cse0 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse1 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 16))) (and (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$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$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse1) 0)) (or (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$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$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$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$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0)))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$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$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse2) 0)) (let ((.cse3 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 24))) (or (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$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$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0))) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$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$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0))))) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (store (store |c_#memory_$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$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse2) 0)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (store (store |c_#memory_$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_end_harness_~#list~0#1.base|) .cse1) 0)) (or (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base| 0))))) is different from false [2022-11-19 07:43:32,024 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 16)) (.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0))) (.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse5 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 8))) (and (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse0 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0)))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store .cse4 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0)) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store .cse4 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse5) 0)) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse6 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse6 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0))) (= v_ArrVal_212 0) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store .cse4 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0))))) (forall ((v_ArrVal_212 Int)) (let ((.cse7 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 24))) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store .cse4 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse7) 0))) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse8 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse8 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse7) 0)))))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |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_end_harness_~#list~0#1.base|) .cse5) 0)) (= v_ArrVal_212 0))) (or (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base| 0))))) is different from false [2022-11-19 07:43:32,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:43:32,135 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 62 treesize of output 55 [2022-11-19 07:43:32,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:43:32,182 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 153 treesize of output 149 [2022-11-19 07:43:32,202 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 136 treesize of output 128 [2022-11-19 07:43:32,218 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 128 treesize of output 124 [2022-11-19 07:43:32,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:43:32,249 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 62 treesize of output 55 [2022-11-19 07:43:32,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:43:32,279 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 348 treesize of output 310 [2022-11-19 07:43:32,300 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 [2022-11-19 07:43:32,322 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 [2022-11-19 07:43:32,501 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 4 [2022-11-19 07:43:32,515 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 4 [2022-11-19 07:43:32,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:43:32,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 70 [2022-11-19 07:43:32,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:43:32,627 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 65 treesize of output 75 [2022-11-19 07:43:32,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:43:32,780 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 [2022-11-19 07:43:32,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:32,803 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 63 treesize of output 55 [2022-11-19 07:43:32,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:43:32,834 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 [2022-11-19 07:43:32,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:32,851 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 126 treesize of output 104 [2022-11-19 07:43:32,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:32,866 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 31 treesize of output 29 [2022-11-19 07:43:32,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:32,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:32,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:32,895 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:43:32,896 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 47 treesize of output 39 [2022-11-19 07:43:32,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:32,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:32,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:32,920 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:43:32,926 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 71 treesize of output 57 [2022-11-19 07:43:32,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:32,942 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 20 treesize of output 18 [2022-11-19 07:43:32,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:32,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:33,001 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-19 07:43:33,002 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 [2022-11-19 07:43:33,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:33,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:33,021 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-19 07:43:33,022 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 [2022-11-19 07:43:33,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:33,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:33,039 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-19 07:43:33,040 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 [2022-11-19 07:43:33,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:33,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:33,057 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-19 07:43:33,058 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 [2022-11-19 07:43:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-11-19 07:43:33,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971971046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:43:33,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [558166148] [2022-11-19 07:43:33,259 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 07:43:33,259 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:43:33,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:43:33,272 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:43:33,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:43:33,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:33,434 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:43:33,435 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 [2022-11-19 07:43:33,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:33,473 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 [2022-11-19 07:43:33,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:33,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:33,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:33,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:33,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:33,844 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 [2022-11-19 07:43:33,882 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 24 treesize of output 9 [2022-11-19 07:43:33,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:33,915 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 [2022-11-19 07:43:33,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:33,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:33,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:33,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:33,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:33,945 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 [2022-11-19 07:43:34,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,124 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-19 07:43:34,125 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 [2022-11-19 07:43:34,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:34,214 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:43:34,214 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 [2022-11-19 07:43:34,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,263 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 [2022-11-19 07:43:34,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,300 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 [2022-11-19 07:43:34,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,408 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:43:34,408 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 [2022-11-19 07:43:34,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:34,464 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 [2022-11-19 07:43:34,574 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 [2022-11-19 07:43:34,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:43:34,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,615 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 [2022-11-19 07:43:34,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,641 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 [2022-11-19 07:43:34,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,668 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 [2022-11-19 07:43:34,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 07:43:34,718 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 [2022-11-19 07:43:34,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,758 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 [2022-11-19 07:43:34,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,783 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 [2022-11-19 07:43:34,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,814 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 [2022-11-19 07:43:34,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:43:34,831 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 33 treesize of output 19 [2022-11-19 07:43:35,515 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-19 07:43:35,761 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 136 for LOIs [2022-11-19 07:43:35,823 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:43:35,848 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:43:39,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [558166148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:43:39,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:43:39,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 10, 9] total 32 [2022-11-19 07:43:39,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556683889] [2022-11-19 07:43:39,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:43:39,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:43:39,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:43:39,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:43:39,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=777, Unknown=2, NotChecked=114, Total=992 [2022-11-19 07:43:39,989 INFO L87 Difference]: Start difference. First operand 54 states and 71 transitions. Second operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 07:43:40,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:43:40,126 INFO L93 Difference]: Finished difference Result 98 states and 125 transitions. [2022-11-19 07:43:40,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:43:40,127 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 [2022-11-19 07:43:40,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:43:40,130 INFO L225 Difference]: With dead ends: 98 [2022-11-19 07:43:40,131 INFO L226 Difference]: Without dead ends: 51 [2022-11-19 07:43:40,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 77 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=99, Invalid=777, Unknown=2, NotChecked=114, Total=992 [2022-11-19 07:43:40,133 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:43:40,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 213 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-11-19 07:43:40,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-19 07:43:40,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2022-11-19 07:43:40,152 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) [2022-11-19 07:43:40,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-11-19 07:43:40,154 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 38 [2022-11-19 07:43:40,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:43:40,154 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-11-19 07:43:40,155 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) [2022-11-19 07:43:40,155 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-11-19 07:43:40,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 07:43:40,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:40,157 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] [2022-11-19 07:43:40,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:43:40,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:40,365 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:40,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:40,366 INFO L85 PathProgramCache]: Analyzing trace with hash -896843747, now seen corresponding path program 1 times [2022-11-19 07:43:40,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:43:40,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788312562] [2022-11-19 07:43:40,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:40,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:43:40,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:43:40,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:43:40,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788312562] [2022-11-19 07:43:40,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788312562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:43:40,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491085502] [2022-11-19 07:43:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:40,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:40,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:43:40,624 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:43:40,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:43:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:40,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:43:40,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:43:40,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:43:40,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491085502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:43:40,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:43:40,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-19 07:43:40,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152793885] [2022-11-19 07:43:40,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:43:40,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:43:40,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:43:40,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:43:40,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:43:40,925 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) [2022-11-19 07:43:41,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:43:41,128 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2022-11-19 07:43:41,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:43:41,129 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 [2022-11-19 07:43:41,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:43:41,130 INFO L225 Difference]: With dead ends: 86 [2022-11-19 07:43:41,130 INFO L226 Difference]: Without dead ends: 52 [2022-11-19 07:43:41,131 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 [2022-11-19 07:43:41,132 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:43:41,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 141 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:43:41,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-19 07:43:41,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-19 07:43:41,148 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) [2022-11-19 07:43:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-11-19 07:43:41,150 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 39 [2022-11-19 07:43:41,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:43:41,151 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-11-19 07:43:41,151 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) [2022-11-19 07:43:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-11-19 07:43:41,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 07:43:41,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:41,153 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] [2022-11-19 07:43:41,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:43:41,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-19 07:43:41,361 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:41,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:41,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2017391933, now seen corresponding path program 1 times [2022-11-19 07:43:41,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:43:41,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164484200] [2022-11-19 07:43:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:41,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:43:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:43:41,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:43:41,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164484200] [2022-11-19 07:43:41,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164484200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:43:41,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934257109] [2022-11-19 07:43:41,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:41,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:41,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:43:41,625 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:43:41,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:43:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:41,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:43:41,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:43:41,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:43:41,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934257109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:43:41,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:43:41,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-19 07:43:41,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769092131] [2022-11-19 07:43:41,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:43:41,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:43:41,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:43:41,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:43:41,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:43:41,956 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) [2022-11-19 07:43:42,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:43:42,225 INFO L93 Difference]: Finished difference Result 103 states and 141 transitions. [2022-11-19 07:43:42,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:43:42,226 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 [2022-11-19 07:43:42,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:43:42,228 INFO L225 Difference]: With dead ends: 103 [2022-11-19 07:43:42,228 INFO L226 Difference]: Without dead ends: 64 [2022-11-19 07:43:42,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:43:42,230 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 65 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:43:42,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 165 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:43:42,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-19 07:43:42,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-11-19 07:43:42,245 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) [2022-11-19 07:43:42,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2022-11-19 07:43:42,246 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 41 [2022-11-19 07:43:42,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:43:42,247 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2022-11-19 07:43:42,247 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) [2022-11-19 07:43:42,247 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2022-11-19 07:43:42,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 07:43:42,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:42,249 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] [2022-11-19 07:43:42,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 07:43:42,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:42,456 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:42,457 INFO L85 PathProgramCache]: Analyzing trace with hash -292506448, now seen corresponding path program 1 times [2022-11-19 07:43:42,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:43:42,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321091412] [2022-11-19 07:43:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:42,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:43:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:43:42,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:43:42,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321091412] [2022-11-19 07:43:42,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321091412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:43:42,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545525087] [2022-11-19 07:43:42,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:42,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:42,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:43:42,798 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:43:42,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:43:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:43,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:43:43,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:43:43,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:43:43,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545525087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:43:43,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:43:43,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-19 07:43:43,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781557186] [2022-11-19 07:43:43,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:43:43,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:43:43,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:43:43,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:43:43,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:43:43,082 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) [2022-11-19 07:43:43,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:43:43,154 INFO L93 Difference]: Finished difference Result 104 states and 145 transitions. [2022-11-19 07:43:43,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:43:43,155 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 [2022-11-19 07:43:43,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:43:43,161 INFO L225 Difference]: With dead ends: 104 [2022-11-19 07:43:43,161 INFO L226 Difference]: Without dead ends: 63 [2022-11-19 07:43:43,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:43:43,165 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:43:43,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:43:43,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-19 07:43:43,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-11-19 07:43:43,204 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) [2022-11-19 07:43:43,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-11-19 07:43:43,209 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 42 [2022-11-19 07:43:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:43:43,211 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-11-19 07:43:43,211 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) [2022-11-19 07:43:43,212 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-11-19 07:43:43,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 07:43:43,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:43:43,217 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] [2022-11-19 07:43:43,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:43:43,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:43,424 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:43:43,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:43:43,425 INFO L85 PathProgramCache]: Analyzing trace with hash 449901180, now seen corresponding path program 1 times [2022-11-19 07:43:43,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:43:43,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334766978] [2022-11-19 07:43:43,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:43,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:43:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:43:43,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:43:43,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334766978] [2022-11-19 07:43:43,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334766978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:43:43,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996926002] [2022-11-19 07:43:43,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:43:43,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:43:43,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:43:43,715 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:43:43,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:43:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:43:43,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-19 07:43:43,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:43:44,131 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-19 07:43:44,132 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 [2022-11-19 07:43:44,158 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:43:44,159 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 [2022-11-19 07:43:44,171 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 [2022-11-19 07:43:44,183 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 [2022-11-19 07:43:44,238 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 48 treesize of output 21 [2022-11-19 07:43:44,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-19 07:44:02,488 WARN L233 SmtUtils]: Spent 16.00s 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) [2022-11-19 07:44:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:44:08,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:44:13,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996926002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:13,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [868692896] [2022-11-19 07:44:13,969 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-19 07:44:13,970 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:13,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:13,971 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:13,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:14,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,069 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:44:14,069 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 [2022-11-19 07:44:14,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,103 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 [2022-11-19 07:44:14,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 07:44:14,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,458 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 [2022-11-19 07:44:14,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,488 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 [2022-11-19 07:44:14,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,539 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 [2022-11-19 07:44:14,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,618 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 [2022-11-19 07:44:14,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,664 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 [2022-11-19 07:44:14,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,710 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 [2022-11-19 07:44:14,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:14,760 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 [2022-11-19 07:44:15,614 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 129 for LOIs [2022-11-19 07:44:16,268 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 170 for LOIs [2022-11-19 07:44:16,346 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:44:16,365 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 23 for LOIs [2022-11-19 07:44:16,457 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:24,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [868692896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:24,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:24,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14, 8] total 42 [2022-11-19 07:44:24,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060691904] [2022-11-19 07:44:24,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:24,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:44:24,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:24,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:44:24,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 07:44:24,830 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) [2022-11-19 07:44:25,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:25,765 INFO L93 Difference]: Finished difference Result 127 states and 175 transitions. [2022-11-19 07:44:25,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:44:25,766 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 [2022-11-19 07:44:25,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:25,768 INFO L225 Difference]: With dead ends: 127 [2022-11-19 07:44:25,770 INFO L226 Difference]: Without dead ends: 80 [2022-11-19 07:44:25,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 89 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 07:44:25,777 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 11 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:25,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 410 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 221 Invalid, 0 Unknown, 183 Unchecked, 0.9s Time] [2022-11-19 07:44:25,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-19 07:44:25,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2022-11-19 07:44:25,819 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) [2022-11-19 07:44:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2022-11-19 07:44:25,820 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 45 [2022-11-19 07:44:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:25,821 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2022-11-19 07:44:25,821 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) [2022-11-19 07:44:25,821 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2022-11-19 07:44:25,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 07:44:25,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:25,823 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] [2022-11-19 07:44:25,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:26,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:26,031 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:26,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:26,032 INFO L85 PathProgramCache]: Analyzing trace with hash 452556718, now seen corresponding path program 1 times [2022-11-19 07:44:26,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:26,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83576122] [2022-11-19 07:44:26,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:26,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:44:26,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:26,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83576122] [2022-11-19 07:44:26,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83576122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:26,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983324876] [2022-11-19 07:44:26,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:26,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:26,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:26,410 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:26,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:44:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:26,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-19 07:44:26,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:26,892 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 [2022-11-19 07:44:26,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:26,898 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 [2022-11-19 07:44:26,970 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-19 07:44:26,970 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 [2022-11-19 07:44:26,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:26,981 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 [2022-11-19 07:44:26,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:26,991 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 [2022-11-19 07:44:27,001 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 [2022-11-19 07:44:27,124 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51| Int) (v_DerPreprocessor_15 (Array Int Int)) (v_DerPreprocessor_16 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51|))) (let ((.cse0 (select .cse1 24))) (and (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51|) (= .cse0 (select v_DerPreprocessor_16 24)) (= .cse0 (select .cse1 0)) (not (= .cse0 0)) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_15) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51| v_DerPreprocessor_16) .cse0 v_DerPreprocessor_15) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51| v_DerPreprocessor_16) .cse0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51|))))) is different from true [2022-11-19 07:44:29,935 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_14| Int) (v_DerPreprocessor_17 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int))) (let ((.cse2 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_14|))) (let ((.cse0 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_14|)) (.cse1 (select .cse2 24))) (and (= (select .cse0 16) 0) (<= (+ .cse1 2) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_14|) (not (= .cse1 0)) (= (select .cse0 8) 0) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_14|) (= (select .cse2 8) 0) (= .cse1 (select v_DerPreprocessor_18 24)) (= .cse1 (select .cse2 0)) (= (select .cse2 16) 0) (= (select |c_#memory_$Pointer$.base| .cse1) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_14| v_DerPreprocessor_18) .cse1 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_14| v_DerPreprocessor_18) .cse1)))))) (exists ((v_DerPreprocessor_20 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_52| Int) (v_DerPreprocessor_19 (Array Int Int))) (let ((.cse4 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_52|))) (let ((.cse3 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_52|)) (.cse5 (select .cse4 24))) (and (= (select .cse3 8) 0) (= (select .cse4 8) 0) (= (select .cse3 16) 0) (<= (+ 2 .cse5) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_52|) (= (select |c_#memory_$Pointer$.base| .cse5) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse5 v_DerPreprocessor_19) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_52| v_DerPreprocessor_20) .cse5 v_DerPreprocessor_19) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_52| v_DerPreprocessor_20) .cse5)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_52|) (not (= .cse5 0)) (= .cse5 (select v_DerPreprocessor_20 24)) (= .cse5 (select .cse4 0)) (= (select .cse4 16) 0))))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51| Int) (v_DerPreprocessor_15 (Array Int Int)) (v_DerPreprocessor_16 (Array Int Int))) (let ((.cse7 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51|))) (let ((.cse6 (select .cse7 24))) (and (<= (+ .cse6 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51|) (= .cse6 (select v_DerPreprocessor_16 24)) (= .cse6 (select .cse7 0)) (not (= .cse6 0)) (= (select |c_#memory_$Pointer$.base| .cse6) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse6 v_DerPreprocessor_15) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51| v_DerPreprocessor_16) .cse6 v_DerPreprocessor_15) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51| v_DerPreprocessor_16) .cse6)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51|)))))) is different from true [2022-11-19 07:44:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-19 07:44:31,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:36,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 590 treesize of output 546 [2022-11-19 07:44:36,975 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 546 treesize of output 518 [2022-11-19 07:44:36,991 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 518 treesize of output 462 [2022-11-19 07:44:37,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:44:37,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 148 [2022-11-19 07:44:37,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:44:37,382 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 835 treesize of output 725 [2022-11-19 07:44:37,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:44:37,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 767 treesize of output 747 [2022-11-19 07:44:37,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:44:37,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 747 treesize of output 737 [2022-11-19 07:44:37,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:44:37,470 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 789 treesize of output 773 [2022-11-19 07:44:37,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:44:37,500 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 773 treesize of output 765 [2022-11-19 07:44:37,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 85 [2022-11-19 07:44:37,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 180 [2022-11-19 07:44:38,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-11-19 07:44:38,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2022-11-19 07:44:38,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 109 [2022-11-19 07:44:38,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:44:38,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 314 treesize of output 280 [2022-11-19 07:44:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:44:40,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983324876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:40,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [78919894] [2022-11-19 07:44:40,179 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-19 07:44:40,180 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:40,180 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:40,181 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:40,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:40,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,262 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-19 07:44:40,263 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 [2022-11-19 07:44:40,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,359 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:44:40,359 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 [2022-11-19 07:44:40,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,655 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 [2022-11-19 07:44:40,683 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 [2022-11-19 07:44:40,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,714 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 [2022-11-19 07:44:40,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,751 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 [2022-11-19 07:44:40,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,828 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 [2022-11-19 07:44:40,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,858 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 [2022-11-19 07:44:40,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:40,930 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:44:40,931 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 [2022-11-19 07:44:40,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:40,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,060 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:44:41,060 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 [2022-11-19 07:44:41,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:41,115 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 [2022-11-19 07:44:41,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,152 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 [2022-11-19 07:44:41,230 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 [2022-11-19 07:44:41,254 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 [2022-11-19 07:44:41,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,282 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 [2022-11-19 07:44:41,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,314 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 [2022-11-19 07:44:41,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,346 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 [2022-11-19 07:44:41,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:41,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,365 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 [2022-11-19 07:44:41,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,438 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 [2022-11-19 07:44:41,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,452 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 [2022-11-19 07:44:41,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,468 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 [2022-11-19 07:44:41,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:41,490 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 [2022-11-19 07:44:42,566 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-19 07:44:43,087 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 156 for LOIs [2022-11-19 07:44:43,171 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:44:43,198 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-19 07:44:43,313 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:51,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [78919894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:44:51,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:51,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 19, 12] total 52 [2022-11-19 07:44:51,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806647531] [2022-11-19 07:44:51,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:44:51,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:44:51,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:51,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:44:51,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2213, Unknown=70, NotChecked=194, Total=2652 [2022-11-19 07:44:51,039 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) [2022-11-19 07:44:52,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:44:52,372 INFO L93 Difference]: Finished difference Result 120 states and 156 transitions. [2022-11-19 07:44:52,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 07:44:52,373 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 [2022-11-19 07:44:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:44:52,375 INFO L225 Difference]: With dead ends: 120 [2022-11-19 07:44:52,375 INFO L226 Difference]: Without dead ends: 73 [2022-11-19 07:44:52,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=191, Invalid=2395, Unknown=74, NotChecked=202, Total=2862 [2022-11-19 07:44:52,377 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:44:52,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 193 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 225 Invalid, 0 Unknown, 183 Unchecked, 0.6s Time] [2022-11-19 07:44:52,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-19 07:44:52,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2022-11-19 07:44:52,414 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) [2022-11-19 07:44:52,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2022-11-19 07:44:52,415 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 46 [2022-11-19 07:44:52,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:44:52,416 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2022-11-19 07:44:52,416 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) [2022-11-19 07:44:52,416 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2022-11-19 07:44:52,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:44:52,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:44:52,418 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] [2022-11-19 07:44:52,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:44:52,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:52,619 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:44:52,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:44:52,619 INFO L85 PathProgramCache]: Analyzing trace with hash -580673182, now seen corresponding path program 1 times [2022-11-19 07:44:52,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:44:52,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970514582] [2022-11-19 07:44:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:52,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:44:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:44:53,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:44:53,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970514582] [2022-11-19 07:44:53,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970514582] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:44:53,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836886231] [2022-11-19 07:44:53,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:44:53,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:44:53,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:44:53,543 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:44:53,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:44:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:44:53,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-19 07:44:53,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:44:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:44:56,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:44:57,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836886231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:57,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1699857427] [2022-11-19 07:44:57,210 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:44:57,211 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:57,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:57,212 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:57,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:57,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,286 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-19 07:44:57,287 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 [2022-11-19 07:44:57,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,353 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:44:57,353 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 [2022-11-19 07:44:57,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,626 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 [2022-11-19 07:44:57,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,653 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 [2022-11-19 07:44:57,683 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 [2022-11-19 07:44:57,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,706 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 [2022-11-19 07:44:57,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,764 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 [2022-11-19 07:44:57,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,803 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 [2022-11-19 07:44:57,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,850 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 [2022-11-19 07:44:57,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:57,881 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 [2022-11-19 07:44:58,699 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 126 for LOIs [2022-11-19 07:44:59,775 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 170 for LOIs [2022-11-19 07:44:59,847 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:44:59,880 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:44:59,954 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:45:10,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1699857427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:45:10,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:45:10,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-19 07:45:10,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864381206] [2022-11-19 07:45:10,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:45:10,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 07:45:10,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:45:10,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 07:45:10,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 07:45:10,119 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) [2022-11-19 07:45:13,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:45:13,481 INFO L93 Difference]: Finished difference Result 134 states and 171 transitions. [2022-11-19 07:45:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 07:45:13,482 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 [2022-11-19 07:45:13,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:45:13,483 INFO L225 Difference]: With dead ends: 134 [2022-11-19 07:45:13,484 INFO L226 Difference]: Without dead ends: 82 [2022-11-19 07:45:13,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=240, Invalid=1482, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 07:45:13,486 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 42 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:45:13,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 216 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 44 Unchecked, 0.6s Time] [2022-11-19 07:45:13,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-19 07:45:13,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-11-19 07:45:13,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 52 states have (on average 1.25) internal successors, (65), 55 states have internal predecessors, (65), 17 states have call successors, (17), 11 states have call predecessors, (17), 12 states have return successors, (22), 15 states have call predecessors, (22), 16 states have call successors, (22) [2022-11-19 07:45:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2022-11-19 07:45:13,535 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 47 [2022-11-19 07:45:13,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:45:13,536 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2022-11-19 07:45:13,536 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) [2022-11-19 07:45:13,536 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2022-11-19 07:45:13,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-19 07:45:13,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:45:13,538 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:45:13,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-19 07:45:13,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-19 07:45:13,745 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:45:13,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:45:13,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1971298836, now seen corresponding path program 1 times [2022-11-19 07:45:13,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:45:13,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135316041] [2022-11-19 07:45:13,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:45:13,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:45:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:14,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:45:14,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:45:14,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135316041] [2022-11-19 07:45:14,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135316041] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:45:14,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796059537] [2022-11-19 07:45:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:45:14,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:14,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:45:14,823 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:45:14,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:45:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:15,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-19 07:45:15,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:45:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:45:18,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:45:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:45:20,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796059537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:45:20,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [23225532] [2022-11-19 07:45:20,608 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:45:20,609 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:45:20,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:45:20,611 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:45:20,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:45:20,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:20,699 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:45:20,699 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 [2022-11-19 07:45:20,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:20,722 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 [2022-11-19 07:45:20,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:20,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:20,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:20,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:20,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:20,926 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 [2022-11-19 07:45:20,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:20,955 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 [2022-11-19 07:45:20,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:20,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:20,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:20,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:20,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:20,985 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 [2022-11-19 07:45:21,036 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 [2022-11-19 07:45:21,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:45:21,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:45:21,117 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:45:21,117 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 [2022-11-19 07:45:21,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,211 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-19 07:45:21,211 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 [2022-11-19 07:45:21,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,323 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:45:21,324 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 [2022-11-19 07:45:21,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,360 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 [2022-11-19 07:45:21,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,396 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 [2022-11-19 07:45:21,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,442 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 [2022-11-19 07:45:21,534 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 [2022-11-19 07:45:21,545 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 [2022-11-19 07:45:21,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:45:21,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,589 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 [2022-11-19 07:45:21,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,625 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 [2022-11-19 07:45:21,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,655 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 [2022-11-19 07:45:21,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,674 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 [2022-11-19 07:45:21,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,708 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 [2022-11-19 07:45:21,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,738 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 [2022-11-19 07:45:21,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,758 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 [2022-11-19 07:45:21,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:21,771 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 [2022-11-19 07:45:22,685 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-19 07:45:23,438 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 156 for LOIs [2022-11-19 07:45:23,480 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:45:23,496 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:45:23,553 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:45:29,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [23225532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:45:29,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:45:29,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-19 07:45:29,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413808809] [2022-11-19 07:45:29,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:45:29,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 07:45:29,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:45:29,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 07:45:29,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1189, Unknown=1, NotChecked=0, Total=1332 [2022-11-19 07:45:29,777 INFO L87 Difference]: Start difference. First operand 82 states and 104 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) [2022-11-19 07:45:31,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:45:31,311 INFO L93 Difference]: Finished difference Result 147 states and 183 transitions. [2022-11-19 07:45:31,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 07:45:31,312 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-11-19 07:45:31,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:45:31,313 INFO L225 Difference]: With dead ends: 147 [2022-11-19 07:45:31,314 INFO L226 Difference]: Without dead ends: 95 [2022-11-19 07:45:31,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=165, Invalid=1394, Unknown=1, NotChecked=0, Total=1560 [2022-11-19 07:45:31,315 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 49 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:45:31,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 178 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 281 Invalid, 0 Unknown, 204 Unchecked, 0.7s Time] [2022-11-19 07:45:31,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-19 07:45:31,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-11-19 07:45:31,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 64 states have internal predecessors, (74), 18 states have call successors, (18), 12 states have call predecessors, (18), 14 states have return successors, (21), 16 states have call predecessors, (21), 17 states have call successors, (21) [2022-11-19 07:45:31,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2022-11-19 07:45:31,357 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 48 [2022-11-19 07:45:31,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:45:31,357 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2022-11-19 07:45:31,358 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) [2022-11-19 07:45:31,358 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2022-11-19 07:45:31,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-19 07:45:31,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:45:31,359 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] [2022-11-19 07:45:31,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:45:31,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:31,566 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:45:31,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:45:31,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1296101873, now seen corresponding path program 1 times [2022-11-19 07:45:31,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:45:31,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699218935] [2022-11-19 07:45:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:45:31,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:45:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:45:31,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:45:31,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699218935] [2022-11-19 07:45:31,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699218935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:45:31,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52010932] [2022-11-19 07:45:31,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:45:31,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:45:31,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:45:31,778 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:45:31,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:45:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:45:32,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-19 07:45:32,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:45:36,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:45:36,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:45:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 07:45:41,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52010932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:45:41,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [364039393] [2022-11-19 07:45:41,325 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:45:41,325 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:45:41,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:45:41,326 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:45:41,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:45:41,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,392 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-19 07:45:41,392 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 [2022-11-19 07:45:41,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,461 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:45:41,461 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 [2022-11-19 07:45:41,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,686 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 [2022-11-19 07:45:41,710 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 [2022-11-19 07:45:41,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,732 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 [2022-11-19 07:45:41,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,759 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 [2022-11-19 07:45:41,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,814 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 [2022-11-19 07:45:41,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,849 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 [2022-11-19 07:45:41,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,874 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 [2022-11-19 07:45:41,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:45:41,910 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 [2022-11-19 07:45:43,432 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 129 for LOIs [2022-11-19 07:45:43,520 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 146 for LOIs [2022-11-19 07:45:45,076 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-19 07:45:45,077 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:45:45,093 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:45:45,152 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:45:58,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4782#(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$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$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$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3| Int)) (and (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 1) (not (= 0 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 24)) 0) |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) (<= 0 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 24)) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 8) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 24)) 0) 16) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|)) (not (= 4 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 24) |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 16) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 16) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 24) 0))) (= 30 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:45:58,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:45:58,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:45:58,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 11] total 26 [2022-11-19 07:45:58,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275999335] [2022-11-19 07:45:58,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:45:58,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 07:45:58,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:45:58,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 07:45:58,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2440, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 07:45:58,542 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand has 26 states, 22 states have (on average 3.0) internal successors, (66), 23 states have internal predecessors, (66), 10 states have call successors, (21), 4 states have call predecessors, (21), 10 states have return successors, (21), 8 states have call predecessors, (21), 10 states have call successors, (21) [2022-11-19 07:46:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:01,182 INFO L93 Difference]: Finished difference Result 193 states and 270 transitions. [2022-11-19 07:46:01,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-19 07:46:01,183 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 3.0) internal successors, (66), 23 states have internal predecessors, (66), 10 states have call successors, (21), 4 states have call predecessors, (21), 10 states have return successors, (21), 8 states have call predecessors, (21), 10 states have call successors, (21) Word has length 48 [2022-11-19 07:46:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:01,184 INFO L225 Difference]: With dead ends: 193 [2022-11-19 07:46:01,185 INFO L226 Difference]: Without dead ends: 154 [2022-11-19 07:46:01,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 92 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=472, Invalid=3950, Unknown=0, NotChecked=0, Total=4422 [2022-11-19 07:46:01,187 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 111 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:01,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 324 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 652 Invalid, 0 Unknown, 117 Unchecked, 1.0s Time] [2022-11-19 07:46:01,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-19 07:46:01,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 81. [2022-11-19 07:46:01,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 17 states have call successors, (17), 11 states have call predecessors, (17), 12 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-19 07:46:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2022-11-19 07:46:01,235 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 48 [2022-11-19 07:46:01,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:01,236 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2022-11-19 07:46:01,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 3.0) internal successors, (66), 23 states have internal predecessors, (66), 10 states have call successors, (21), 4 states have call predecessors, (21), 10 states have return successors, (21), 8 states have call predecessors, (21), 10 states have call successors, (21) [2022-11-19 07:46:01,236 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2022-11-19 07:46:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-19 07:46:01,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:01,238 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:01,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:01,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:01,445 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:01,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:01,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1126327094, now seen corresponding path program 1 times [2022-11-19 07:46:01,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:01,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025287558] [2022-11-19 07:46:01,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:01,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 07:46:01,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:01,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025287558] [2022-11-19 07:46:01,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025287558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:01,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470054839] [2022-11-19 07:46:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:01,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:01,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:01,691 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:01,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:46:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:01,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-19 07:46:01,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:12,676 WARN L233 SmtUtils]: Spent 8.56s 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) [2022-11-19 07:46:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:46:17,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:46:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:46:21,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470054839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:46:21,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1764477854] [2022-11-19 07:46:21,999 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:46:21,999 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:46:22,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:46:22,000 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:46:22,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:46:22,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,065 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:46:22,065 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 [2022-11-19 07:46:22,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,085 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 [2022-11-19 07:46:22,287 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 [2022-11-19 07:46:22,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,308 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 [2022-11-19 07:46:22,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,328 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 [2022-11-19 07:46:22,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,352 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 [2022-11-19 07:46:22,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,399 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 [2022-11-19 07:46:22,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,431 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 [2022-11-19 07:46:22,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,466 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 [2022-11-19 07:46:22,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:22,492 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 [2022-11-19 07:46:23,824 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 129 for LOIs [2022-11-19 07:46:23,895 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-19 07:46:24,657 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-19 07:46:24,658 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:46:24,674 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:46:24,756 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:46:36,916 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5602#(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$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54| Int)) (and (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 1) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0) 16) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0) 4)) (= 32 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0))) (not (= 2 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0))) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) (= 0 (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 16)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0) 0)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 24) 0) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 8) 0) (not (= 3 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0))) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 16) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 8) 0))) (= (select |#valid| 3) 1) (= (select (select |#memory_$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)) (= 30 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:46:36,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:46:36,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:46:36,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18, 7] total 27 [2022-11-19 07:46:36,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856983778] [2022-11-19 07:46:36,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:46:36,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 07:46:36,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:36,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 07:46:36,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2557, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 07:46:36,919 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 27 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 25 states have internal predecessors, (70), 11 states have call successors, (21), 5 states have call predecessors, (21), 11 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) [2022-11-19 07:46:46,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:46,093 INFO L93 Difference]: Finished difference Result 211 states and 296 transitions. [2022-11-19 07:46:46,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-19 07:46:46,094 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 25 states have internal predecessors, (70), 11 states have call successors, (21), 5 states have call predecessors, (21), 11 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) Word has length 56 [2022-11-19 07:46:46,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:46,096 INFO L225 Difference]: With dead ends: 211 [2022-11-19 07:46:46,096 INFO L226 Difference]: Without dead ends: 164 [2022-11-19 07:46:46,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2455 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=582, Invalid=6899, Unknown=1, NotChecked=0, Total=7482 [2022-11-19 07:46:46,099 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 114 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 447 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:46,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 763 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1332 Invalid, 0 Unknown, 447 Unchecked, 1.3s Time] [2022-11-19 07:46:46,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-19 07:46:46,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 98. [2022-11-19 07:46:46,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 68 states have internal predecessors, (74), 19 states have call successors, (19), 12 states have call predecessors, (19), 15 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-11-19 07:46:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 115 transitions. [2022-11-19 07:46:46,172 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 115 transitions. Word has length 56 [2022-11-19 07:46:46,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:46,173 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 115 transitions. [2022-11-19 07:46:46,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 25 states have internal predecessors, (70), 11 states have call successors, (21), 5 states have call predecessors, (21), 11 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) [2022-11-19 07:46:46,173 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 115 transitions. [2022-11-19 07:46:46,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-19 07:46:46,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:46,175 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:46,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:46,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:46,383 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:46:46,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:46,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1290419280, now seen corresponding path program 1 times [2022-11-19 07:46:46,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:46,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629032534] [2022-11-19 07:46:46,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:46,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:46:47,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:47,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629032534] [2022-11-19 07:46:47,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629032534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:47,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756059900] [2022-11-19 07:46:47,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:47,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:47,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:47,043 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:47,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:46:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:47,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-19 07:46:47,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:46:47,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:46:48,340 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 19 treesize of output 11 [2022-11-19 07:46:48,474 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:46:48,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-19 07:46:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:46:48,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756059900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:46:48,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2111864775] [2022-11-19 07:46:48,648 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:46:48,648 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:46:48,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:46:48,649 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:46:48,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:46:48,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,715 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:46:48,716 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 [2022-11-19 07:46:48,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,733 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 [2022-11-19 07:46:48,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,938 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 [2022-11-19 07:46:48,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,964 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 [2022-11-19 07:46:48,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,989 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 [2022-11-19 07:46:49,014 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 [2022-11-19 07:46:49,064 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 [2022-11-19 07:46:49,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,082 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 [2022-11-19 07:46:49,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,113 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 [2022-11-19 07:46:49,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,143 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 [2022-11-19 07:46:50,544 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 129 for LOIs [2022-11-19 07:46:50,613 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-19 07:46:51,341 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-19 07:46:51,342 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:46:51,357 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:46:51,432 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:47:04,697 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6537#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11| Int)) (and (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) (<= 0 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 24)) 0) 16) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 16) 0) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 24)) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 24) 0) (= |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 24)) 0)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|)) (not (= |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11| 0)) (not (= |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11| 4)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 8) 0) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 1) (= |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 24)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|)) (= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 16)))) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= 30 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:47:04,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:47:04,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:47:04,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 15] total 37 [2022-11-19 07:47:04,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086761897] [2022-11-19 07:47:04,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:04,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-19 07:47:04,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:04,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-19 07:47:04,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=3687, Unknown=0, NotChecked=0, Total=4032 [2022-11-19 07:47:04,701 INFO L87 Difference]: Start difference. First operand 98 states and 115 transitions. Second operand has 37 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 15 states have call successors, (23), 3 states have call predecessors, (23), 9 states have return successors, (23), 12 states have call predecessors, (23), 15 states have call successors, (23) [2022-11-19 07:47:06,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:06,737 INFO L93 Difference]: Finished difference Result 192 states and 256 transitions. [2022-11-19 07:47:06,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-19 07:47:06,738 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 15 states have call successors, (23), 3 states have call predecessors, (23), 9 states have return successors, (23), 12 states have call predecessors, (23), 15 states have call successors, (23) Word has length 58 [2022-11-19 07:47:06,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:06,739 INFO L225 Difference]: With dead ends: 192 [2022-11-19 07:47:06,740 INFO L226 Difference]: Without dead ends: 150 [2022-11-19 07:47:06,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 135 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=606, Invalid=6534, Unknown=0, NotChecked=0, Total=7140 [2022-11-19 07:47:06,742 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 210 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:06,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 791 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1018 Invalid, 0 Unknown, 173 Unchecked, 0.9s Time] [2022-11-19 07:47:06,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-19 07:47:06,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 116. [2022-11-19 07:47:06,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 73 states have (on average 1.178082191780822) internal successors, (86), 78 states have internal predecessors, (86), 26 states have call successors, (26), 12 states have call predecessors, (26), 16 states have return successors, (35), 25 states have call predecessors, (35), 25 states have call successors, (35) [2022-11-19 07:47:06,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 147 transitions. [2022-11-19 07:47:06,817 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 147 transitions. Word has length 58 [2022-11-19 07:47:06,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:06,818 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 147 transitions. [2022-11-19 07:47:06,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 15 states have call successors, (23), 3 states have call predecessors, (23), 9 states have return successors, (23), 12 states have call predecessors, (23), 15 states have call successors, (23) [2022-11-19 07:47:06,818 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 147 transitions. [2022-11-19 07:47:06,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-19 07:47:06,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:06,819 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:06,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:07,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:47:07,027 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:07,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:07,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1101091191, now seen corresponding path program 2 times [2022-11-19 07:47:07,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:07,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027464446] [2022-11-19 07:47:07,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:07,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:47:10,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:10,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027464446] [2022-11-19 07:47:10,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027464446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:10,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901717964] [2022-11-19 07:47:10,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:47:10,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:10,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:10,131 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:10,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:47:10,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:47:10,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:47:10,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-19 07:47:10,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:47:19,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:47:23,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901717964] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:23,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [967601183] [2022-11-19 07:47:23,254 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:47:23,254 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:47:23,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:47:23,255 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:47:23,255 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:47:23,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,329 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:47:23,329 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 [2022-11-19 07:47:23,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,344 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 [2022-11-19 07:47:23,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,545 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 [2022-11-19 07:47:23,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,569 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 [2022-11-19 07:47:23,596 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 [2022-11-19 07:47:23,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,622 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 [2022-11-19 07:47:23,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,679 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 [2022-11-19 07:47:23,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,700 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 [2022-11-19 07:47:23,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,730 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 [2022-11-19 07:47:23,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,763 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 [2022-11-19 07:47:25,196 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 126 for LOIs [2022-11-19 07:47:25,265 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-19 07:47:25,948 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-19 07:47:25,949 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:47:25,964 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:47:26,021 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:47:38,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7450#(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$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15| Int)) (and (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|)) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) 8) 0) (not (= |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15| 4)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) 0) 16) (not (= |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15| 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) 16) 0) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) 24) 0) (<= 0 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) 24) |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) 8) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) 0) |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) 16) 0))) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= 30 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:47:38,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:47:38,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:47:38,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 7] total 28 [2022-11-19 07:47:38,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745590817] [2022-11-19 07:47:38,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:38,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 07:47:38,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:38,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 07:47:38,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2638, Unknown=0, NotChecked=0, Total=2970 [2022-11-19 07:47:38,880 INFO L87 Difference]: Start difference. First operand 116 states and 147 transitions. Second operand has 28 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 27 states have internal predecessors, (68), 12 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) [2022-11-19 07:47:45,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:45,729 INFO L93 Difference]: Finished difference Result 215 states and 297 transitions. [2022-11-19 07:47:45,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-19 07:47:45,730 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 27 states have internal predecessors, (68), 12 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) Word has length 59 [2022-11-19 07:47:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:45,731 INFO L225 Difference]: With dead ends: 215 [2022-11-19 07:47:45,732 INFO L226 Difference]: Without dead ends: 165 [2022-11-19 07:47:45,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 138 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=686, Invalid=6119, Unknown=1, NotChecked=0, Total=6806 [2022-11-19 07:47:45,735 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 114 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:45,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 513 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 770 Invalid, 0 Unknown, 115 Unchecked, 0.9s Time] [2022-11-19 07:47:45,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-19 07:47:45,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 116. [2022-11-19 07:47:45,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 77 states have internal predecessors, (85), 26 states have call successors, (26), 13 states have call predecessors, (26), 16 states have return successors, (33), 25 states have call predecessors, (33), 25 states have call successors, (33) [2022-11-19 07:47:45,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 144 transitions. [2022-11-19 07:47:45,802 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 144 transitions. Word has length 59 [2022-11-19 07:47:45,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:45,803 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 144 transitions. [2022-11-19 07:47:45,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 27 states have internal predecessors, (68), 12 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) [2022-11-19 07:47:45,803 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 144 transitions. [2022-11-19 07:47:45,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 07:47:45,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:45,805 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] [2022-11-19 07:47:45,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:46,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:47:46,011 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:47:46,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:46,011 INFO L85 PathProgramCache]: Analyzing trace with hash 418573970, now seen corresponding path program 1 times [2022-11-19 07:47:46,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:46,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105431757] [2022-11-19 07:47:46,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:46,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:47:48,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:48,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105431757] [2022-11-19 07:47:48,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105431757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:48,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125471659] [2022-11-19 07:47:48,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:48,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:48,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:48,524 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:48,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:47:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:48,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-19 07:47:48,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:52,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:58,906 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse12 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|))) (let ((.cse10 (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)) (.cse11 (+ 8 .cse12))) (or (and (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_69| Int)) (or (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66| Int)) (let ((.cse2 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_69|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_69|)) (.cse1 (+ 8 .cse2))) (or (not (= (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_69|)) (= .cse2 0) (not (= (select (select |c_#memory_$Pointer$.base| .cse0) .cse1) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66|)))))) (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_69| 0))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66| Int)) (or (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_69| Int)) (let ((.cse5 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_69|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_69|)) (.cse4 (+ 8 .cse5))) (or (not (= (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_69|)) (= .cse5 0) (not (= (select (select |c_#memory_$Pointer$.base| .cse3) .cse4) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66|)))))) (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66| 0))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66| Int)) (or (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_69| Int)) (let ((.cse6 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_69|)) (.cse7 (+ 8 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_69|)))) (or (not (= (select (select |c_#memory_$Pointer$.offset| .cse6) .cse7) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_69|)) (= .cse6 0) (not (= (select (select |c_#memory_$Pointer$.base| .cse6) .cse7) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66|))))) (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66| 0))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_69| Int)) (or (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66| Int)) (let ((.cse8 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_69|)) (.cse9 (+ 8 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_69|)))) (or (not (= (select (select |c_#memory_$Pointer$.offset| .cse8) .cse9) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_69|)) (= .cse8 0) (not (= (select (select |c_#memory_$Pointer$.base| .cse8) .cse9) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66|))))) (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_69| 0)))) (not (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| (select (select |c_#memory_$Pointer$.offset| .cse10) .cse11))) (and (= 0 |c_aws_linked_list_node_next_is_valid_#in~node.base|) (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| 0)) (not (<= (mod |c_aws_linked_list_node_next_is_valid_#res| 256) 0)) (and (= .cse12 0) (= .cse10 0)) (not (= (select (select |c_#memory_$Pointer$.base| .cse10) .cse11) |c_aws_linked_list_node_next_is_valid_#in~node.base|))))) is different from false [2022-11-19 07:48:01,891 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-19 07:48:01,891 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 46 [2022-11-19 07:48:02,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125471659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:48:02,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [711727831] [2022-11-19 07:48:02,157 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:48:02,157 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:48:02,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:48:02,157 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:48:02,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:48:02,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,313 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-19 07:48:02,313 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 [2022-11-19 07:48:02,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,468 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:48:02,469 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 [2022-11-19 07:48:02,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,682 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 [2022-11-19 07:48:02,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,721 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 [2022-11-19 07:48:02,749 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 [2022-11-19 07:48:02,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,780 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 [2022-11-19 07:48:02,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,838 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 [2022-11-19 07:48:02,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,877 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 [2022-11-19 07:48:02,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,928 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 [2022-11-19 07:48:02,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:02,976 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 [2022-11-19 07:48:11,793 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 153 for LOIs [2022-11-19 07:48:12,060 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 146 for LOIs [2022-11-19 07:48:13,282 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-19 07:48:13,319 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:48:13,337 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:48:13,397 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:48:54,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8350#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$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$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105| Int)) (and (= 32 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|))) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105| 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) 0)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) (- 8))) 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) 1) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) 2)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) (- 8))) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) 3)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) 4)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) 8))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105| (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) 8))))) (= 30 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:48:54,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:48:54,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:48:54,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 42 [2022-11-19 07:48:54,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229951709] [2022-11-19 07:48:54,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:54,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-19 07:48:54,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:54,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-19 07:48:54,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=5417, Unknown=1, NotChecked=150, Total=6006 [2022-11-19 07:48:54,266 INFO L87 Difference]: Start difference. First operand 116 states and 144 transitions. Second operand has 42 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-19 07:49:04,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:04,897 INFO L93 Difference]: Finished difference Result 257 states and 375 transitions. [2022-11-19 07:49:04,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-19 07:49:04,899 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) Word has length 67 [2022-11-19 07:49:04,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:04,901 INFO L225 Difference]: With dead ends: 257 [2022-11-19 07:49:04,901 INFO L226 Difference]: Without dead ends: 210 [2022-11-19 07:49:04,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 89 SyntacticMatches, 10 SemanticMatches, 102 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3350 ImplicationChecksByTransitivity, 53.5s TimeCoverageRelationStatistics Valid=808, Invalid=9701, Unknown=1, NotChecked=202, Total=10712 [2022-11-19 07:49:04,904 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 73 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 736 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:04,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 1316 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1207 Invalid, 0 Unknown, 736 Unchecked, 3.8s Time] [2022-11-19 07:49:04,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-19 07:49:05,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 172. [2022-11-19 07:49:05,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 109 states have (on average 1.165137614678899) internal successors, (127), 116 states have internal predecessors, (127), 39 states have call successors, (39), 18 states have call predecessors, (39), 23 states have return successors, (67), 37 states have call predecessors, (67), 38 states have call successors, (67) [2022-11-19 07:49:05,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 233 transitions. [2022-11-19 07:49:05,040 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 233 transitions. Word has length 67 [2022-11-19 07:49:05,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:05,041 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 233 transitions. [2022-11-19 07:49:05,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-19 07:49:05,041 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 233 transitions. [2022-11-19 07:49:05,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:49:05,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:05,043 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1] [2022-11-19 07:49:05,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:49:05,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:05,250 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:05,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:05,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1931204807, now seen corresponding path program 1 times [2022-11-19 07:49:05,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:05,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451254790] [2022-11-19 07:49:05,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:05,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:49:06,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:06,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451254790] [2022-11-19 07:49:06,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451254790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:49:06,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884631397] [2022-11-19 07:49:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:06,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:06,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:49:06,622 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:49:06,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:49:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:07,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-19 07:49:07,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:09,221 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_75| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_75|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_75| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_75|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78|) 0)))) is different from true [2022-11-19 07:49:11,062 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:49:11,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 30 [2022-11-19 07:49:11,081 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-19 07:49:11,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 1 [2022-11-19 07:49:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 49 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-19 07:49:11,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:49:12,725 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-19 07:49:12,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-19 07:49:12,748 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-19 07:49:12,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2022-11-19 07:49:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 07:49:12,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884631397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:49:12,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1132134760] [2022-11-19 07:49:12,832 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:49:12,832 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:49:12,832 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:49:12,832 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:49:12,832 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:49:12,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,007 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:49:13,008 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 [2022-11-19 07:49:13,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,033 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 [2022-11-19 07:49:13,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,239 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 [2022-11-19 07:49:13,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,270 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 [2022-11-19 07:49:13,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,312 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 [2022-11-19 07:49:13,345 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 [2022-11-19 07:49:13,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,411 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 [2022-11-19 07:49:13,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,652 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:49:13,653 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 [2022-11-19 07:49:13,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:13,707 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 [2022-11-19 07:49:13,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,770 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 [2022-11-19 07:49:13,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,814 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 [2022-11-19 07:49:13,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:13,842 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 [2022-11-19 07:49:14,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:14,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:14,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:14,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:14,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:14,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:14,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:14,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:14,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:14,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:14,634 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-19 07:49:14,635 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 662 treesize of output 671 [2022-11-19 07:49:14,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:14,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:14,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:14,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:14,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:14,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:14,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:14,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:14,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:14,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:15,310 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-19 07:49:15,311 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 676 treesize of output 685 [2022-11-19 07:49:15,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:15,424 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-19 07:49:15,425 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 [2022-11-19 07:49:15,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:15,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:15,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 656 treesize of output 635 [2022-11-19 07:49:15,958 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-11-19 07:49:15,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 648 treesize of output 678 [2022-11-19 07:49:16,187 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-11-19 07:49:16,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 641 treesize of output 652 [2022-11-19 07:49:24,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:24,296 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 [2022-11-19 07:49:24,552 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 [2022-11-19 07:49:24,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:24,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:24,583 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 [2022-11-19 07:49:24,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:24,609 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 [2022-11-19 07:49:24,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:24,638 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 [2022-11-19 07:49:24,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:24,667 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 [2022-11-19 07:49:24,682 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 [2022-11-19 07:49:24,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:24,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:24,711 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 [2022-11-19 07:49:24,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:24,733 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 [2022-11-19 07:49:24,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:24,764 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 [2022-11-19 07:49:24,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:24,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 07:49:25,411 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2022-11-19 07:49:26,190 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-11-19 07:49:26,193 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:49:26,210 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:49:26,266 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:49:36,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1132134760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:49:36,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:49:36,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [10, 17, 14] total 43 [2022-11-19 07:49:36,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96475860] [2022-11-19 07:49:36,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:49:36,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:49:36,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:36,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:49:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1551, Unknown=1, NotChecked=80, Total=1806 [2022-11-19 07:49:36,530 INFO L87 Difference]: Start difference. First operand 172 states and 233 transitions. Second operand has 20 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 07:49:39,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:39,845 INFO L93 Difference]: Finished difference Result 261 states and 351 transitions. [2022-11-19 07:49:39,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:49:39,846 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 4 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 70 [2022-11-19 07:49:39,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:39,848 INFO L225 Difference]: With dead ends: 261 [2022-11-19 07:49:39,848 INFO L226 Difference]: Without dead ends: 172 [2022-11-19 07:49:39,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 176 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=203, Invalid=1870, Unknown=1, NotChecked=88, Total=2162 [2022-11-19 07:49:39,849 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:39,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 179 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 343 Invalid, 0 Unknown, 96 Unchecked, 1.5s Time] [2022-11-19 07:49:39,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-19 07:49:39,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-11-19 07:49:39,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 116 states have internal predecessors, (126), 39 states have call successors, (39), 18 states have call predecessors, (39), 23 states have return successors, (67), 37 states have call predecessors, (67), 38 states have call successors, (67) [2022-11-19 07:49:39,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 232 transitions. [2022-11-19 07:49:39,968 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 232 transitions. Word has length 70 [2022-11-19 07:49:39,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:39,968 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 232 transitions. [2022-11-19 07:49:39,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 07:49:39,969 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 232 transitions. [2022-11-19 07:49:39,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:49:39,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:39,971 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:49:39,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:49:40,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:49:40,178 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:40,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:40,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1289991631, now seen corresponding path program 1 times [2022-11-19 07:49:40,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:40,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823104253] [2022-11-19 07:49:40,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:40,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-19 07:49:40,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:40,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823104253] [2022-11-19 07:49:40,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823104253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:49:40,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:49:40,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:49:40,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488085466] [2022-11-19 07:49:40,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:49:40,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:49:40,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:40,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:49:40,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:49:40,558 INFO L87 Difference]: Start difference. First operand 172 states and 232 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-19 07:49:41,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:41,170 INFO L93 Difference]: Finished difference Result 190 states and 260 transitions. [2022-11-19 07:49:41,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:49:41,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 70 [2022-11-19 07:49:41,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:41,172 INFO L225 Difference]: With dead ends: 190 [2022-11-19 07:49:41,172 INFO L226 Difference]: Without dead ends: 188 [2022-11-19 07:49:41,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:49:41,173 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 10 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:41,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 275 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:49:41,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-19 07:49:41,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 182. [2022-11-19 07:49:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 123 states have internal predecessors, (132), 41 states have call successors, (41), 19 states have call predecessors, (41), 25 states have return successors, (78), 39 states have call predecessors, (78), 40 states have call successors, (78) [2022-11-19 07:49:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 251 transitions. [2022-11-19 07:49:41,276 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 251 transitions. Word has length 70 [2022-11-19 07:49:41,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:41,277 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 251 transitions. [2022-11-19 07:49:41,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-19 07:49:41,277 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 251 transitions. [2022-11-19 07:49:41,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:49:41,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:41,279 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1] [2022-11-19 07:49:41,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 07:49:41,279 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:41,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:41,280 INFO L85 PathProgramCache]: Analyzing trace with hash 637212922, now seen corresponding path program 1 times [2022-11-19 07:49:41,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:41,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140169510] [2022-11-19 07:49:41,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:41,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-19 07:49:41,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:41,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140169510] [2022-11-19 07:49:41,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140169510] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:49:41,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002381557] [2022-11-19 07:49:41,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:41,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:41,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:49:41,707 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:49:41,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:49:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:42,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-19 07:49:42,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:42,419 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 [2022-11-19 07:49:42,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:42,430 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 [2022-11-19 07:49:42,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:42,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:42,529 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 [2022-11-19 07:49:42,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:42,538 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 [2022-11-19 07:49:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 43 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:49:43,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:49:44,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:49:44,488 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 [2022-11-19 07:49:44,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:49:44,551 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 [2022-11-19 07:49:44,562 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 [2022-11-19 07:49:44,574 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 [2022-11-19 07:49:44,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-19 07:49:44,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:49:44,751 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 [2022-11-19 07:49:44,947 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 50 treesize of output 48 [2022-11-19 07:49:44,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2022-11-19 07:49:44,980 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 8 treesize of output 6 [2022-11-19 07:49:45,002 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 [2022-11-19 07:49:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-19 07:49:45,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002381557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:49:45,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588020024] [2022-11-19 07:49:45,428 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:49:45,428 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:49:45,429 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:49:45,429 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:49:45,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:49:45,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:45,658 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:49:45,658 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 [2022-11-19 07:49:45,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:45,689 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 [2022-11-19 07:49:45,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:45,893 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 [2022-11-19 07:49:45,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:45,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:45,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:45,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:45,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:45,925 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 [2022-11-19 07:49:45,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:45,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:45,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:45,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:45,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:45,966 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 [2022-11-19 07:49:46,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 07:49:46,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:46,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:46,132 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:49:46,132 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 [2022-11-19 07:49:46,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:46,253 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:49:46,253 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 [2022-11-19 07:49:46,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,295 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 [2022-11-19 07:49:46,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,532 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:49:46,533 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 [2022-11-19 07:49:46,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,571 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 [2022-11-19 07:49:46,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,617 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 [2022-11-19 07:49:46,672 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 [2022-11-19 07:49:46,697 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 [2022-11-19 07:49:46,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:46,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,736 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 [2022-11-19 07:49:46,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,779 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 [2022-11-19 07:49:46,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,815 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 [2022-11-19 07:49:46,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,838 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 [2022-11-19 07:49:46,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,883 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 [2022-11-19 07:49:46,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,922 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 [2022-11-19 07:49:46,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,938 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 [2022-11-19 07:49:46,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:49:46,970 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 [2022-11-19 07:49:49,231 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-19 07:49:49,258 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-19 07:49:49,966 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-19 07:49:49,969 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:49:49,986 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:49:50,042 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:50:07,750 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11193#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_213| Int)) (and (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213| 0) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_213|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213| 24))) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_213|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213| 24)) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_213|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_213|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_213|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_213|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_213|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213| 24))) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213| 16)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_213|))) (= |~#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 [2022-11-19 07:50:07,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:50:07,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:50:07,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 11] total 26 [2022-11-19 07:50:07,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547517997] [2022-11-19 07:50:07,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:50:07,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 07:50:07,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:50:07,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 07:50:07,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2538, Unknown=10, NotChecked=0, Total=2756 [2022-11-19 07:50:07,753 INFO L87 Difference]: Start difference. First operand 182 states and 251 transitions. Second operand has 26 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 25 states have internal predecessors, (81), 10 states have call successors, (26), 3 states have call predecessors, (26), 7 states have return successors, (25), 8 states have call predecessors, (25), 10 states have call successors, (25) [2022-11-19 07:50:13,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:50:13,046 INFO L93 Difference]: Finished difference Result 361 states and 532 transitions. [2022-11-19 07:50:13,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 07:50:13,046 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 25 states have internal predecessors, (81), 10 states have call successors, (26), 3 states have call predecessors, (26), 7 states have return successors, (25), 8 states have call predecessors, (25), 10 states have call successors, (25) Word has length 73 [2022-11-19 07:50:13,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:50:13,048 INFO L225 Difference]: With dead ends: 361 [2022-11-19 07:50:13,049 INFO L226 Difference]: Without dead ends: 227 [2022-11-19 07:50:13,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 170 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=368, Invalid=4731, Unknown=13, NotChecked=0, Total=5112 [2022-11-19 07:50:13,050 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 100 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:50:13,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 639 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 940 Invalid, 0 Unknown, 337 Unchecked, 2.8s Time] [2022-11-19 07:50:13,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-19 07:50:13,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 205. [2022-11-19 07:50:13,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 134 states have internal predecessors, (144), 52 states have call successors, (52), 21 states have call predecessors, (52), 25 states have return successors, (86), 49 states have call predecessors, (86), 51 states have call successors, (86) [2022-11-19 07:50:13,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 282 transitions. [2022-11-19 07:50:13,220 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 282 transitions. Word has length 73 [2022-11-19 07:50:13,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:50:13,220 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 282 transitions. [2022-11-19 07:50:13,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 25 states have internal predecessors, (81), 10 states have call successors, (26), 3 states have call predecessors, (26), 7 states have return successors, (25), 8 states have call predecessors, (25), 10 states have call successors, (25) [2022-11-19 07:50:13,221 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 282 transitions. [2022-11-19 07:50:13,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:50:13,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:50:13,223 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:50:13,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:50:13,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 07:50:13,443 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:50:13,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:50:13,444 INFO L85 PathProgramCache]: Analyzing trace with hash -358000847, now seen corresponding path program 2 times [2022-11-19 07:50:13,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:50:13,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585834483] [2022-11-19 07:50:13,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:50:13,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:50:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:50:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:50:15,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:50:15,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585834483] [2022-11-19 07:50:15,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585834483] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:50:15,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046154346] [2022-11-19 07:50:15,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:50:16,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:50:16,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:50:16,001 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:50:16,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:50:16,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:50:16,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:50:16,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-19 07:50:16,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:50:42,682 WARN L233 SmtUtils]: Spent 10.03s 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) [2022-11-19 07:50:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 57 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:50:43,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:50:45,355 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:50:45,355 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 [2022-11-19 07:50:45,394 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:50:45,394 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 [2022-11-19 07:50:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-19 07:50:45,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046154346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:50:45,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2067183189] [2022-11-19 07:50:45,687 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:50:45,687 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:50:45,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:50:45,688 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:50:45,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:50:45,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:45,861 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-19 07:50:45,862 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 [2022-11-19 07:50:45,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,037 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:50:46,037 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 [2022-11-19 07:50:46,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,245 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 [2022-11-19 07:50:46,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,279 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 [2022-11-19 07:50:46,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,320 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 [2022-11-19 07:50:46,351 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 [2022-11-19 07:50:46,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,406 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 [2022-11-19 07:50:46,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,445 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 [2022-11-19 07:50:46,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,488 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 [2022-11-19 07:50:46,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:50:46,523 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 [2022-11-19 07:50:55,683 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 153 for LOIs [2022-11-19 07:50:55,947 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-19 07:50:56,702 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-19 07:50:56,747 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:50:56,766 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:50:56,831 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:51:36,373 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12579#(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$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$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$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (<= 0 |#NULL.offset|) (= 30 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140| Int)) (and (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|) (- 8))) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) 0) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|) 8)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|) 8)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) 32) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|) (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (not (= 4 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|) (- 8))) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|) 0)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) 1) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143| 0) (not (= 3 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|))) (not (= 2 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|))))) (< 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 07:51:36,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:51:36,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:51:36,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 13] total 35 [2022-11-19 07:51:36,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616897414] [2022-11-19 07:51:36,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:51:36,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 07:51:36,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:51:36,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 07:51:36,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=3516, Unknown=7, NotChecked=0, Total=3906 [2022-11-19 07:51:36,377 INFO L87 Difference]: Start difference. First operand 205 states and 282 transitions. Second operand has 35 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2022-11-19 07:52:01,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:52:01,549 INFO L93 Difference]: Finished difference Result 454 states and 707 transitions. [2022-11-19 07:52:01,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-19 07:52:01,550 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) Word has length 73 [2022-11-19 07:52:01,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:52:01,556 INFO L225 Difference]: With dead ends: 454 [2022-11-19 07:52:01,556 INFO L226 Difference]: Without dead ends: 357 [2022-11-19 07:52:01,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 178 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2348 ImplicationChecksByTransitivity, 86.7s TimeCoverageRelationStatistics Valid=713, Invalid=6582, Unknown=15, NotChecked=0, Total=7310 [2022-11-19 07:52:01,559 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 217 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 1649 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 2251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 357 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:52:01,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 1058 Invalid, 2251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1649 Invalid, 0 Unknown, 357 Unchecked, 5.6s Time] [2022-11-19 07:52:01,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-11-19 07:52:01,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 275. [2022-11-19 07:52:01,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 178 states have (on average 1.1292134831460674) internal successors, (201), 188 states have internal predecessors, (201), 60 states have call successors, (60), 29 states have call predecessors, (60), 36 states have return successors, (102), 57 states have call predecessors, (102), 59 states have call successors, (102) [2022-11-19 07:52:01,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 363 transitions. [2022-11-19 07:52:01,795 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 363 transitions. Word has length 73 [2022-11-19 07:52:01,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:52:01,796 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 363 transitions. [2022-11-19 07:52:01,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2022-11-19 07:52:01,797 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 363 transitions. [2022-11-19 07:52:01,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-19 07:52:01,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:52:01,799 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] [2022-11-19 07:52:01,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:52:02,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:52:02,007 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:52:02,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:52:02,007 INFO L85 PathProgramCache]: Analyzing trace with hash -78907407, now seen corresponding path program 1 times [2022-11-19 07:52:02,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:52:02,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480361344] [2022-11-19 07:52:02,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:02,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:52:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:52:04,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:52:04,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480361344] [2022-11-19 07:52:04,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480361344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:52:04,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22108225] [2022-11-19 07:52:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:52:04,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:52:04,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:52:04,675 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:52:04,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:52:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:52:05,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-19 07:52:05,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:52:31,480 WARN L233 SmtUtils]: Spent 10.04s 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) [2022-11-19 07:52:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:52:31,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:52:34,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:52:34,205 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 [2022-11-19 07:52:34,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:52:34,247 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 [2022-11-19 07:52:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:52:34,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22108225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:52:34,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1557082901] [2022-11-19 07:52:34,476 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:52:34,476 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:52:34,477 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:52:34,477 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:52:34,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:52:34,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:34,655 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-19 07:52:34,656 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 [2022-11-19 07:52:34,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:34,844 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:52:34,844 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 [2022-11-19 07:52:35,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,098 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 [2022-11-19 07:52:35,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,135 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 [2022-11-19 07:52:35,164 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 [2022-11-19 07:52:35,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,199 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 [2022-11-19 07:52:35,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:52:35,393 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:52:35,394 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 [2022-11-19 07:52:35,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,668 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:52:35,669 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 [2022-11-19 07:52:35,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,708 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 [2022-11-19 07:52:35,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:52:35,765 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 [2022-11-19 07:52:35,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,812 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 [2022-11-19 07:52:35,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,852 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 [2022-11-19 07:52:35,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:52:35,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,920 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 [2022-11-19 07:52:35,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:35,949 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 [2022-11-19 07:52:36,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:36,004 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 [2022-11-19 07:52:36,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:36,036 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 [2022-11-19 07:52:36,053 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 [2022-11-19 07:52:36,070 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 [2022-11-19 07:52:36,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:36,120 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 [2022-11-19 07:52:36,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:36,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:36,141 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 [2022-11-19 07:52:36,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:36,172 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 [2022-11-19 07:52:36,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:52:36,204 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 [2022-11-19 07:52:37,565 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2022-11-19 07:52:37,585 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 59 for LOIs [2022-11-19 07:52:38,960 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-19 07:52:38,964 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:52:38,981 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:52:39,067 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:52:59,478 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14244#(and (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:52:59,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:52:59,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:52:59,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 14] total 34 [2022-11-19 07:52:59,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683760976] [2022-11-19 07:52:59,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:52:59,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 07:52:59,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:52:59,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 07:52:59,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=3394, Unknown=7, NotChecked=0, Total=3660 [2022-11-19 07:52:59,481 INFO L87 Difference]: Start difference. First operand 275 states and 363 transitions. Second operand has 34 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 32 states have internal predecessors, (104), 16 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (28), 12 states have call predecessors, (28), 16 states have call successors, (28) [2022-11-19 07:53:17,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:53:17,751 INFO L93 Difference]: Finished difference Result 439 states and 583 transitions. [2022-11-19 07:53:17,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-19 07:53:17,752 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 32 states have internal predecessors, (104), 16 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (28), 12 states have call predecessors, (28), 16 states have call successors, (28) Word has length 75 [2022-11-19 07:53:17,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:53:17,754 INFO L225 Difference]: With dead ends: 439 [2022-11-19 07:53:17,754 INFO L226 Difference]: Without dead ends: 251 [2022-11-19 07:53:17,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 177 SyntacticMatches, 16 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 62.7s TimeCoverageRelationStatistics Valid=425, Invalid=5724, Unknown=13, NotChecked=0, Total=6162 [2022-11-19 07:53:17,757 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 123 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:53:17,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 590 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 961 Invalid, 0 Unknown, 316 Unchecked, 3.4s Time] [2022-11-19 07:53:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-19 07:53:17,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 197. [2022-11-19 07:53:17,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 140 states have internal predecessors, (151), 35 states have call successors, (35), 24 states have call predecessors, (35), 26 states have return successors, (40), 32 states have call predecessors, (40), 34 states have call successors, (40) [2022-11-19 07:53:17,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 226 transitions. [2022-11-19 07:53:17,908 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 226 transitions. Word has length 75 [2022-11-19 07:53:17,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:53:17,909 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 226 transitions. [2022-11-19 07:53:17,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 3.3548387096774195) internal successors, (104), 32 states have internal predecessors, (104), 16 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (28), 12 states have call predecessors, (28), 16 states have call successors, (28) [2022-11-19 07:53:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 226 transitions. [2022-11-19 07:53:17,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:53:17,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:53:17,911 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:53:17,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:53:18,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:53:18,120 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:53:18,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:53:18,120 INFO L85 PathProgramCache]: Analyzing trace with hash 683217571, now seen corresponding path program 2 times [2022-11-19 07:53:18,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:53:18,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462661906] [2022-11-19 07:53:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:53:18,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:53:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:53:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 07:53:20,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:53:20,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462661906] [2022-11-19 07:53:20,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462661906] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:53:20,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626730585] [2022-11-19 07:53:20,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:53:20,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:53:20,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:53:20,163 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:53:20,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 07:53:20,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:53:20,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:53:20,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-19 07:53:20,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:53:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 53 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:53:26,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:53:40,672 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse12 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)) (.cse1 (+ 8 .cse12))) (or (not (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1))) (and (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124| Int)) (or (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124| 0) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| Int)) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127|)) (.cse3 (+ 8 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127|)))) (or (= .cse2 0) (not (= (select (select |c_#memory_$Pointer$.base| .cse2) .cse3) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|)) (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| (select (select |c_#memory_$Pointer$.offset| .cse2) .cse3)))))))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| Int)) (or (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124| Int)) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127|)) (.cse5 (+ 8 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127|)))) (or (= .cse4 0) (not (= (select (select |c_#memory_$Pointer$.base| .cse4) .cse5) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|)) (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| (select (select |c_#memory_$Pointer$.offset| .cse4) .cse5)))))) (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| 0))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| Int)) (or (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| 0) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124| Int)) (let ((.cse6 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127|))) (let ((.cse7 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127|)) (.cse8 (+ 8 .cse6))) (or (= .cse6 0) (not (= (select (select |c_#memory_$Pointer$.base| .cse7) .cse8) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|)) (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| (select (select |c_#memory_$Pointer$.offset| .cse7) .cse8))))))))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124| Int)) (or (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124| 0) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| Int)) (let ((.cse9 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127|))) (let ((.cse10 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127|)) (.cse11 (+ 8 .cse9))) (or (= .cse9 0) (not (= (select (select |c_#memory_$Pointer$.base| .cse10) .cse11) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|)) (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| (select (select |c_#memory_$Pointer$.offset| .cse10) .cse11)))))))))) (and (= 0 |c_aws_linked_list_node_next_is_valid_#in~node.base|) (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| 0)) (not (<= (mod |c_aws_linked_list_node_next_is_valid_#res| 256) 0)) (and (= .cse12 0) (= .cse0 0)) (not (= (select (select |c_#memory_$Pointer$.base| .cse0) .cse1) |c_aws_linked_list_node_next_is_valid_#in~node.base|))))) is different from false [2022-11-19 07:53:53,791 INFO L321 Elim1Store]: treesize reduction 8, result has 90.6 percent of original size [2022-11-19 07:53:53,791 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 [2022-11-19 07:53:54,209 INFO L321 Elim1Store]: treesize reduction 24, result has 68.0 percent of original size [2022-11-19 07:53:54,210 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 [2022-11-19 07:54:03,687 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 45 DAG size of output: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:54:03,827 INFO L321 Elim1Store]: treesize reduction 45, result has 2.2 percent of original size [2022-11-19 07:54:03,827 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 [2022-11-19 07:54:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 41 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 1 not checked. [2022-11-19 07:54:04,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626730585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:54:04,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1679936328] [2022-11-19 07:54:04,713 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 07:54:04,714 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:54:04,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:54:04,715 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:54:04,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:54:04,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:04,970 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-19 07:54:04,971 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 [2022-11-19 07:54:05,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,228 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 07:54:05,228 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 [2022-11-19 07:54:05,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,459 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 [2022-11-19 07:54:05,487 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 [2022-11-19 07:54:05,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,527 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 [2022-11-19 07:54:05,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,575 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 [2022-11-19 07:54:05,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:05,746 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 07:54:05,746 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 [2022-11-19 07:54:05,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,789 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 [2022-11-19 07:54:05,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:05,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,130 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:54:06,130 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 [2022-11-19 07:54:06,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:06,200 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 [2022-11-19 07:54:06,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,256 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 [2022-11-19 07:54:06,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,294 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 [2022-11-19 07:54:06,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,377 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 [2022-11-19 07:54:06,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:54:06,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 07:54:06,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,454 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 [2022-11-19 07:54:06,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,496 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 [2022-11-19 07:54:06,526 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 [2022-11-19 07:54:06,545 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 [2022-11-19 07:54:06,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,594 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 [2022-11-19 07:54:06,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,615 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 [2022-11-19 07:54:06,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,654 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 [2022-11-19 07:54:06,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:54:06,696 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 [2022-11-19 07:54:08,053 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2022-11-19 07:54:08,073 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 58 for LOIs [2022-11-19 07:54:09,371 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 31 for LOIs [2022-11-19 07:54:09,377 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-19 07:54:09,396 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 07:54:09,460 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:54:40,715 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15737#(and (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:54:40,715 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:54:40,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:54:40,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 16] total 42 [2022-11-19 07:54:40,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067396857] [2022-11-19 07:54:40,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:54:40,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-19 07:54:40,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:40,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-19 07:54:40,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=4292, Unknown=1, NotChecked=132, Total=4692 [2022-11-19 07:54:40,719 INFO L87 Difference]: Start difference. First operand 197 states and 226 transitions. Second operand has 42 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 38 states have internal predecessors, (93), 15 states have call successors, (29), 3 states have call predecessors, (29), 11 states have return successors, (28), 12 states have call predecessors, (28), 15 states have call successors, (28) [2022-11-19 07:54:45,603 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse20 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|))) (let ((.cse19 (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)) (.cse21 (+ 8 .cse20))) (let ((.cse6 (= (select (select |c_#memory_$Pointer$.base| .cse19) .cse21) |c_aws_linked_list_node_next_is_valid_#in~node.base|)) (.cse5 (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| (select (select |c_#memory_$Pointer$.offset| .cse19) .cse21)))) (let ((.cse7 (not .cse5)) (.cse0 (= 0 |c_aws_linked_list_node_next_is_valid_#in~node.base|)) (.cse1 (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| 0)) (.cse3 (= .cse20 0)) (.cse4 (= .cse19 0)) (.cse8 (not .cse6))) (and (let ((.cse2 (= |c_aws_linked_list_node_next_is_valid_#res| 0))) (or (and .cse0 .cse1 .cse2) (and (or (and .cse3 .cse4 .cse2) (and (or (not .cse3) (not .cse4)) (or (and .cse5 .cse6 (= |c_aws_linked_list_node_next_is_valid_#res| 1)) (and (or .cse7 .cse8) .cse2)))) (or (not .cse1) (not .cse0))))) (or .cse7 (and (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124| Int)) (or (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124| 0) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| Int)) (let ((.cse9 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127|)) (.cse10 (+ 8 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127|)))) (or (= .cse9 0) (not (= (select (select |c_#memory_$Pointer$.base| .cse9) .cse10) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|)) (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| (select (select |c_#memory_$Pointer$.offset| .cse9) .cse10)))))))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| Int)) (or (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124| Int)) (let ((.cse11 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127|)) (.cse12 (+ 8 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127|)))) (or (= .cse11 0) (not (= (select (select |c_#memory_$Pointer$.base| .cse11) .cse12) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|)) (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| (select (select |c_#memory_$Pointer$.offset| .cse11) .cse12)))))) (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| 0))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| Int)) (or (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| 0) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124| Int)) (let ((.cse13 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127|))) (let ((.cse14 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127|)) (.cse15 (+ 8 .cse13))) (or (= .cse13 0) (not (= (select (select |c_#memory_$Pointer$.base| .cse14) .cse15) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|)) (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| (select (select |c_#memory_$Pointer$.offset| .cse14) .cse15))))))))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124| Int)) (or (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124| 0) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| Int)) (let ((.cse16 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127|))) (let ((.cse17 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127|)) (.cse18 (+ 8 .cse16))) (or (= .cse16 0) (not (= (select (select |c_#memory_$Pointer$.base| .cse17) .cse18) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_124|)) (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_127| (select (select |c_#memory_$Pointer$.offset| .cse17) .cse18)))))))))) (and .cse0 .cse1) (not (<= (mod |c_aws_linked_list_node_next_is_valid_#res| 256) 0)) (and .cse3 .cse4) .cse8)))))) is different from false [2022-11-19 07:54:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:57,672 INFO L93 Difference]: Finished difference Result 251 states and 294 transitions. [2022-11-19 07:54:57,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-19 07:54:57,673 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 38 states have internal predecessors, (93), 15 states have call successors, (29), 3 states have call predecessors, (29), 11 states have return successors, (28), 12 states have call predecessors, (28), 15 states have call successors, (28) Word has length 74 [2022-11-19 07:54:57,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:57,675 INFO L225 Difference]: With dead ends: 251 [2022-11-19 07:54:57,676 INFO L226 Difference]: Without dead ends: 182 [2022-11-19 07:54:57,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 160 SyntacticMatches, 14 SemanticMatches, 85 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 2304 ImplicationChecksByTransitivity, 58.7s TimeCoverageRelationStatistics Valid=449, Invalid=6697, Unknown=2, NotChecked=334, Total=7482 [2022-11-19 07:54:57,679 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 98 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:57,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 608 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 916 Invalid, 0 Unknown, 339 Unchecked, 5.2s Time] [2022-11-19 07:54:57,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-19 07:54:57,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 170. [2022-11-19 07:54:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 116 states have (on average 1.103448275862069) internal successors, (128), 119 states have internal predecessors, (128), 32 states have call successors, (32), 21 states have call predecessors, (32), 21 states have return successors, (33), 29 states have call predecessors, (33), 31 states have call successors, (33) [2022-11-19 07:54:57,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 193 transitions. [2022-11-19 07:54:57,816 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 193 transitions. Word has length 74 [2022-11-19 07:54:57,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:57,816 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 193 transitions. [2022-11-19 07:54:57,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 38 states have internal predecessors, (93), 15 states have call successors, (29), 3 states have call predecessors, (29), 11 states have return successors, (28), 12 states have call predecessors, (28), 15 states have call successors, (28) [2022-11-19 07:54:57,817 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 193 transitions. [2022-11-19 07:54:57,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 07:54:57,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:57,818 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] [2022-11-19 07:54:57,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 07:54:58,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:54:58,026 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:58,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1472651218, now seen corresponding path program 1 times [2022-11-19 07:54:58,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:58,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330955548] [2022-11-19 07:54:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:58,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:54:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-19 07:54:58,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:54:58,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330955548] [2022-11-19 07:54:58,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330955548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:54:58,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:54:58,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:54:58,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963947008] [2022-11-19 07:54:58,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:54:58,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:54:58,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:54:58,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:54:58,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:54:58,526 INFO L87 Difference]: Start difference. First operand 170 states and 193 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) [2022-11-19 07:54:59,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:54:59,066 INFO L93 Difference]: Finished difference Result 176 states and 198 transitions. [2022-11-19 07:54:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:54:59,067 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 [2022-11-19 07:54:59,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:54:59,068 INFO L225 Difference]: With dead ends: 176 [2022-11-19 07:54:59,068 INFO L226 Difference]: Without dead ends: 174 [2022-11-19 07:54:59,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:54:59,070 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:54:59,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 157 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:54:59,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-19 07:54:59,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-11-19 07:54:59,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 119 states have (on average 1.1008403361344539) internal successors, (131), 122 states have internal predecessors, (131), 32 states have call successors, (32), 22 states have call predecessors, (32), 22 states have return successors, (33), 29 states have call predecessors, (33), 31 states have call successors, (33) [2022-11-19 07:54:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 196 transitions. [2022-11-19 07:54:59,216 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 196 transitions. Word has length 76 [2022-11-19 07:54:59,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:54:59,216 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 196 transitions. [2022-11-19 07:54:59,217 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) [2022-11-19 07:54:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 196 transitions. [2022-11-19 07:54:59,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-19 07:54:59,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:54:59,219 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, 1] [2022-11-19 07:54:59,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-19 07:54:59,219 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:54:59,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:54:59,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1828961022, now seen corresponding path program 3 times [2022-11-19 07:54:59,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:54:59,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284313751] [2022-11-19 07:54:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:54:59,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:54:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 6 proven. 68 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 07:55:07,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:55:07,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284313751] [2022-11-19 07:55:07,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284313751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:55:07,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232884478] [2022-11-19 07:55:07,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:55:07,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:55:07,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:55:07,544 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:55:07,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d9b428-054a-4236-a69c-1bbe5926623e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 07:55:08,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:55:08,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:55:08,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 155 conjunts are in the unsatisfiable core [2022-11-19 07:55:08,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:09,170 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 [2022-11-19 07:55:09,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:09,190 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 [2022-11-19 07:55:09,250 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 [2022-11-19 07:55:09,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:09,269 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 [2022-11-19 07:55:09,746 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-19 07:55:09,747 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 101 treesize of output 123 [2022-11-19 07:55:09,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:09,769 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 109 treesize of output 91 [2022-11-19 07:55:09,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:09,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:09,799 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 28 treesize of output 25 [2022-11-19 07:55:09,825 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 [2022-11-19 07:55:09,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:09,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 23 [2022-11-19 07:55:09,883 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 [2022-11-19 07:55:09,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:09,925 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 [2022-11-19 07:56:11,276 WARN L233 SmtUtils]: Spent 19.93s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:56:14,394 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse13 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_is_valid_#in~list#1.base|) |c_aws_linked_list_is_valid_#in~list#1.offset|))) (let ((.cse12 (+ .cse13 8)) (.cse11 (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_is_valid_#in~list#1.base|) |c_aws_linked_list_is_valid_#in~list#1.offset|))) (and (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_351| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_351|) 0))) (and (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_351|) 0) 0) (<= (+ 2 .cse0) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_351|) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_351|) (not (= .cse0 0))))) (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_138| Int)) (and (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_138| 0)) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_135| Int)) (let ((.cse3 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_135|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_138|))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_135|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_138|)) (.cse2 (+ .cse3 8))) (and (= (select (select |c_#memory_$Pointer$.base| .cse1) .cse2) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_135|) (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_138| (select (select |c_#memory_$Pointer$.offset| .cse1) .cse2)) (not (= .cse3 0)))))))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_135| Int)) (and (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_138| Int)) (let ((.cse6 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_135|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_138|))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_135|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_138|)) (.cse5 (+ .cse6 8))) (and (= (select (select |c_#memory_$Pointer$.base| .cse4) .cse5) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_135|) (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_138| (select (select |c_#memory_$Pointer$.offset| .cse4) .cse5)) (not (= .cse6 0)))))) (not (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_135| 0)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_135| Int)) (and (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_138| Int)) (let ((.cse7 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_135|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_138|)) (.cse8 (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_135|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_138|) 8))) (and (not (= .cse7 0)) (= (select (select |c_#memory_$Pointer$.base| .cse7) .cse8) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_135|) (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_138| (select (select |c_#memory_$Pointer$.offset| .cse7) .cse8))))) (not (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_135| 0)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_138| Int)) (and (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_135| Int)) (let ((.cse9 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_135|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_138|)) (.cse10 (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_135|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_138|) 8))) (and (not (= .cse9 0)) (= (select (select |c_#memory_$Pointer$.base| .cse9) .cse10) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_135|) (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_138| (select (select |c_#memory_$Pointer$.offset| .cse9) .cse10))))) (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_138| 0))))) (= |c_aws_linked_list_is_valid_#in~list#1.offset| (select (select |c_#memory_$Pointer$.offset| .cse11) .cse12)) (= |c_aws_linked_list_is_valid_#in~list#1.base| (select (select |c_#memory_$Pointer$.base| .cse11) .cse12)) (or (not (= |c_aws_linked_list_is_valid_#in~list#1.offset| 0)) (not (= |c_aws_linked_list_is_valid_#in~list#1.base| 0))) (or (not (= .cse11 0)) (not (= .cse13 0)))))) is different from true [2022-11-19 07:56:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 46 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 23 not checked. [2022-11-19 07:56:52,932 INFO L328 TraceCheckSpWp]: Computing backward predicates...