./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 12:01:40,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:01:40,052 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:01:40,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:01:40,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:01:40,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:01:40,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:01:40,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:01:40,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:01:40,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:01:40,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:01:40,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:01:40,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:01:40,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:01:40,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:01:40,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:01:40,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:01:40,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:01:40,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:01:40,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:01:40,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:01:40,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:01:40,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:01:40,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:01:40,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:01:40,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:01:40,096 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:01:40,097 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:01:40,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:01:40,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:01:40,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:01:40,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:01:40,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:01:40,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:01:40,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:01:40,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:01:40,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:01:40,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:01:40,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:01:40,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:01:40,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:01:40,105 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 12:01:40,123 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:01:40,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:01:40,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:01:40,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:01:40,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:01:40,130 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:01:40,130 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:01:40,130 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:01:40,130 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:01:40,131 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:01:40,131 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:01:40,131 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:01:40,131 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:01:40,131 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:01:40,131 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:01:40,132 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:01:40,132 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:01:40,132 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:01:40,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:01:40,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:01:40,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:01:40,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:01:40,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:01:40,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:01:40,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:01:40,133 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:01:40,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:01:40,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:01:40,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:01:40,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:01:40,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:01:40,134 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:01:40,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:01:40,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:01:40,134 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:01:40,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:01:40,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:01:40,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:01:40,135 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_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 [2022-12-14 12:01:40,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:01:40,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:01:40,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:01:40,337 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:01:40,337 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:01:40,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2022-12-14 12:01:42,993 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:01:43,352 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:01:43,353 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2022-12-14 12:01:43,374 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/data/2a3ed3814/ab4ddc7b4eac40aca95abc23efb4b465/FLAG9e5046dfb [2022-12-14 12:01:43,387 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/data/2a3ed3814/ab4ddc7b4eac40aca95abc23efb4b465 [2022-12-14 12:01:43,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:01:43,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:01:43,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:01:43,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:01:43,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:01:43,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:01:43" (1/1) ... [2022-12-14 12:01:43,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f45a88d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:01:43, skipping insertion in model container [2022-12-14 12:01:43,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:01:43" (1/1) ... [2022-12-14 12:01:43,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:01:43,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:01:43,630 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2022-12-14 12:01:43,636 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2022-12-14 12:01:44,235 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,236 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,236 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,237 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,238 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,247 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,248 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,249 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,250 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,251 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,252 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,252 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,253 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,305 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 12:01:44,306 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 12:01:44,306 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 12:01:44,310 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 12:01:44,312 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 12:01:44,312 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 12:01:44,520 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 12:01:44,521 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 12:01:44,522 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 12:01:44,523 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 12:01:44,524 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 12:01:44,525 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 12:01:44,525 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 12:01:44,526 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 12:01:44,527 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 12:01:44,527 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 12:01:44,528 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 12:01:44,642 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 12:01:44,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:01:44,672 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:01:44,682 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2022-12-14 12:01:44,682 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2022-12-14 12:01:44,711 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,711 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,712 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,712 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,713 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,718 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,718 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,719 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,719 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,720 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,721 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,721 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,722 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:01:44,727 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 12:01:44,727 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 12:01:44,728 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 12:01:44,730 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 12:01:44,731 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 12:01:44,732 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 12:01:44,761 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 12:01:44,762 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 12:01:44,763 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 12:01:44,763 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 12:01:44,764 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 12:01:44,764 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 12:01:44,765 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 12:01:44,765 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 12:01:44,765 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 12:01:44,776 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 12:01:44,777 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 12:01:44,795 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 12:01:44,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:01:44,928 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:01:44,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:01:44 WrapperNode [2022-12-14 12:01:44,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:01:44,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:01:44,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:01:44,929 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:01:44,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:01:44" (1/1) ... [2022-12-14 12:01:44,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:01:44" (1/1) ... [2022-12-14 12:01:45,001 INFO L138 Inliner]: procedures = 679, calls = 1047, calls flagged for inlining = 49, calls inlined = 4, statements flattened = 88 [2022-12-14 12:01:45,002 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:01:45,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:01:45,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:01:45,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:01:45,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:01:44" (1/1) ... [2022-12-14 12:01:45,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:01:44" (1/1) ... [2022-12-14 12:01:45,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:01:44" (1/1) ... [2022-12-14 12:01:45,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:01:44" (1/1) ... [2022-12-14 12:01:45,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:01:44" (1/1) ... [2022-12-14 12:01:45,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:01:44" (1/1) ... [2022-12-14 12:01:45,033 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:01:44" (1/1) ... [2022-12-14 12:01:45,035 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:01:44" (1/1) ... [2022-12-14 12:01:45,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:01:45,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:01:45,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:01:45,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:01:45,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:01:44" (1/1) ... [2022-12-14 12:01:45,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:01:45,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:01:45,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:01:45,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:01:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-12-14 12:01:45,106 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-12-14 12:01:45,107 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2022-12-14 12:01:45,107 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2022-12-14 12:01:45,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:01:45,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 12:01:45,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 12:01:45,107 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 12:01:45,107 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-12-14 12:01:45,107 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-12-14 12:01:45,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:01:45,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 12:01:45,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:01:45,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:01:45,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-12-14 12:01:45,108 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-12-14 12:01:45,108 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 12:01:45,108 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 12:01:45,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 12:01:45,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 12:01:45,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 12:01:45,109 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-12-14 12:01:45,109 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-12-14 12:01:45,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:01:45,307 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:01:45,309 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:01:45,510 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:01:45,578 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:01:45,578 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 12:01:45,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:01:45 BoogieIcfgContainer [2022-12-14 12:01:45,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:01:45,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:01:45,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:01:45,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:01:45,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:01:43" (1/3) ... [2022-12-14 12:01:45,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da809d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:01:45, skipping insertion in model container [2022-12-14 12:01:45,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:01:44" (2/3) ... [2022-12-14 12:01:45,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6da809d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:01:45, skipping insertion in model container [2022-12-14 12:01:45,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:01:45" (3/3) ... [2022-12-14 12:01:45,589 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_remove_harness.i [2022-12-14 12:01:45,607 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:01:45,607 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:01:45,642 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:01:45,647 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;@11154933, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:01:45,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:01:45,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-12-14 12:01:45,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 12:01:45,657 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:01:45,658 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-12-14 12:01:45,659 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:01:45,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:01:45,663 INFO L85 PathProgramCache]: Analyzing trace with hash -102561370, now seen corresponding path program 1 times [2022-12-14 12:01:45,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:01:45,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592775792] [2022-12-14 12:01:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:01:45,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:01:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:01:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:01:45,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:01:45,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592775792] [2022-12-14 12:01:45,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592775792] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:01:45,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:01:45,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:01:45,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739392734] [2022-12-14 12:01:45,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:01:45,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 12:01:45,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:01:45,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 12:01:45,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 12:01:45,961 INFO L87 Difference]: Start difference. First operand has 52 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 12:01:46,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:01:46,008 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2022-12-14 12:01:46,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 12:01:46,010 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2022-12-14 12:01:46,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:01:46,015 INFO L225 Difference]: With dead ends: 92 [2022-12-14 12:01:46,016 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 12:01:46,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 12:01:46,020 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:01:46,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:01:46,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 12:01:46,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-12-14 12:01:46,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 12:01:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-12-14 12:01:46,048 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 30 [2022-12-14 12:01:46,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:01:46,050 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-12-14 12:01:46,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 12:01:46,050 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-12-14 12:01:46,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 12:01:46,051 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:01:46,051 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-12-14 12:01:46,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:01:46,051 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:01:46,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:01:46,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1837047811, now seen corresponding path program 1 times [2022-12-14 12:01:46,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:01:46,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226710177] [2022-12-14 12:01:46,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:01:46,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:01:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:01:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:01:46,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:01:46,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226710177] [2022-12-14 12:01:46,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226710177] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:01:46,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:01:46,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 12:01:46,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542797782] [2022-12-14 12:01:46,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:01:46,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 12:01:46,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:01:46,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 12:01:46,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:01:46,326 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 12:01:46,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:01:46,469 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-12-14 12:01:46,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:01:46,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 35 [2022-12-14 12:01:46,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:01:46,470 INFO L225 Difference]: With dead ends: 60 [2022-12-14 12:01:46,471 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 12:01:46,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:01:46,472 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 5 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:01:46,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 242 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:01:46,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 12:01:46,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-12-14 12:01:46,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 18 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-12-14 12:01:46,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-12-14 12:01:46,479 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 35 [2022-12-14 12:01:46,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:01:46,479 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-12-14 12:01:46,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 12:01:46,479 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-12-14 12:01:46,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 12:01:46,480 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:01:46,480 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:01:46,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:01:46,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:01:46,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:01:46,481 INFO L85 PathProgramCache]: Analyzing trace with hash 775983286, now seen corresponding path program 1 times [2022-12-14 12:01:46,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:01:46,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326917801] [2022-12-14 12:01:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:01:46,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:01:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:01:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:01:46,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:01:46,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326917801] [2022-12-14 12:01:46,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326917801] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:01:46,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:01:46,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:01:46,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902426303] [2022-12-14 12:01:46,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:01:46,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:01:46,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:01:46,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:01:46,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:01:46,735 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:01:46,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:01:46,809 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2022-12-14 12:01:46,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:01:46,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 36 [2022-12-14 12:01:46,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:01:46,812 INFO L225 Difference]: With dead ends: 100 [2022-12-14 12:01:46,813 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 12:01:46,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:01:46,814 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:01:46,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 154 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:01:46,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 12:01:46,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-12-14 12:01:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 32 states have internal predecessors, (34), 18 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-12-14 12:01:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-12-14 12:01:46,824 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 36 [2022-12-14 12:01:46,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:01:46,824 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-12-14 12:01:46,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:01:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-12-14 12:01:46,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 12:01:46,826 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:01:46,826 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:01:46,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 12:01:46,826 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:01:46,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:01:46,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1082045479, now seen corresponding path program 1 times [2022-12-14 12:01:46,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:01:46,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308262987] [2022-12-14 12:01:46,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:01:46,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:01:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:01:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:01:47,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:01:47,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308262987] [2022-12-14 12:01:47,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308262987] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:01:47,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040576309] [2022-12-14 12:01:47,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:01:47,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:01:47,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:01:47,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:01:47,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:01:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:01:47,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 12:01:47,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:01:47,457 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 12:01:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:01:47,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:01:47,927 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 14 treesize of output 12 [2022-12-14 12:01:47,931 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 22 treesize of output 20 [2022-12-14 12:01:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:01:47,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040576309] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:01:47,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1217245359] [2022-12-14 12:01:47,978 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 12:01:47,978 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:01:47,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:01:47,985 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:01:47,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:01:48,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:01:48,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:01:48,096 INFO L321 Elim1Store]: treesize reduction 84, result has 39.6 percent of original size [2022-12-14 12:01:48,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 179 treesize of output 113 [2022-12-14 12:01:48,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:01:48,166 INFO L321 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2022-12-14 12:01:48,167 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 1 case distinctions, treesize of input 86 treesize of output 41 [2022-12-14 12:01:48,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-12-14 12:01:48,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:01:48,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:01:48,266 INFO L321 Elim1Store]: treesize reduction 92, result has 33.8 percent of original size [2022-12-14 12:01:48,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 179 treesize of output 105 [2022-12-14 12:01:48,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,428 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-12-14 12:01:48,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 65 treesize of output 113 [2022-12-14 12:01:48,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 16 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 26 [2022-12-14 12:01:48,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:48,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 24 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 48 [2022-12-14 12:01:48,558 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_remove with input of size 37 for LOIs [2022-12-14 12:01:48,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:49,219 INFO L321 Elim1Store]: treesize reduction 327, result has 24.8 percent of original size [2022-12-14 12:01:49,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 726 treesize of output 493 [2022-12-14 12:01:49,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:49,458 INFO L321 Elim1Store]: treesize reduction 387, result has 27.1 percent of original size [2022-12-14 12:01:49,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 637 treesize of output 599 [2022-12-14 12:01:49,535 INFO L321 Elim1Store]: treesize reduction 101, result has 44.5 percent of original size [2022-12-14 12:01:49,535 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 151 treesize of output 81 [2022-12-14 12:01:49,596 INFO L321 Elim1Store]: treesize reduction 101, result has 44.5 percent of original size [2022-12-14 12:01:49,597 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 151 treesize of output 81 [2022-12-14 12:01:49,665 INFO L321 Elim1Store]: treesize reduction 131, result has 10.9 percent of original size [2022-12-14 12:01:49,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 815 treesize of output 608 [2022-12-14 12:01:49,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:49,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-12-14 12:01:49,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:49,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:01:49,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 551 treesize of output 391 [2022-12-14 12:01:49,945 INFO L321 Elim1Store]: treesize reduction 194, result has 30.5 percent of original size [2022-12-14 12:01:49,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1652 treesize of output 1082 [2022-12-14 12:01:49,970 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 27 treesize of output 5 [2022-12-14 12:01:49,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:49,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:50,006 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-12-14 12:01:50,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 113 [2022-12-14 12:01:50,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:50,062 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-12-14 12:01:50,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 952 treesize of output 884 [2022-12-14 12:01:50,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:50,103 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:01:50,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 980 treesize of output 970 [2022-12-14 12:01:50,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:50,233 INFO L321 Elim1Store]: treesize reduction 8, result has 92.4 percent of original size [2022-12-14 12:01:50,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 1021 treesize of output 1043 [2022-12-14 12:01:50,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:50,330 INFO L321 Elim1Store]: treesize reduction 65, result has 13.3 percent of original size [2022-12-14 12:01:50,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 993 treesize of output 929 [2022-12-14 12:01:50,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:50,622 INFO L321 Elim1Store]: treesize reduction 72, result has 4.0 percent of original size [2022-12-14 12:01:50,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 912 treesize of output 845 [2022-12-14 12:01:50,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 12:01:50,675 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 852 treesize of output 818 [2022-12-14 12:01:50,765 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 880 treesize of output 840 [2022-12-14 12:01:53,099 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:01:53,104 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:01:53,108 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:01:53,113 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:01:53,125 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:01:53,132 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 64 treesize of output 63 [2022-12-14 12:01:53,139 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 64 treesize of output 63 [2022-12-14 12:01:53,145 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 66 treesize of output 65 [2022-12-14 12:01:53,159 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:01:53,168 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:01:53,174 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:01:53,180 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:01:53,333 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 48 for LOIs [2022-12-14 12:01:53,362 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2022-12-14 12:01:53,372 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 41 for LOIs [2022-12-14 12:01:53,386 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 25 for LOIs [2022-12-14 12:01:53,446 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 55 for LOIs [2022-12-14 12:01:53,552 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:01:53,560 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 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:01:53,571 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:01:53,579 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:01:53,592 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-12-14 12:01:53,665 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:01:56,317 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '924#(and (<= |~#s_can_fail_allocator_static~0.base| 4) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (<= 4 |~#s_can_fail_allocator_static~0.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (exists ((|v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.base_BEFORE_CALL_10| Int) (|v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.offset_BEFORE_CALL_10| Int)) (and (not (= (mod (select (select |#memory_int| |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.base_BEFORE_CALL_10|) |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.offset_BEFORE_CALL_10|) 256) 0)) (not (= (mod (ite (= (ite (or (not (= |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.base_BEFORE_CALL_10| 0)) (not (= |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.offset_BEFORE_CALL_10| 0))) 1 0) 0) 0 1) 256) 0)) (<= 0 |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.offset_BEFORE_CALL_10|) (<= 0 |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.base_BEFORE_CALL_10|) (<= |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.offset_BEFORE_CALL_10| 0))) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-12-14 12:01:56,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:01:56,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:01:56,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 8] total 17 [2022-12-14 12:01:56,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438043285] [2022-12-14 12:01:56,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:01:56,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 12:01:56,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:01:56,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 12:01:56,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1758, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 12:01:56,320 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 12:01:57,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:01:57,021 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2022-12-14 12:01:57,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 12:01:57,022 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 37 [2022-12-14 12:01:57,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:01:57,023 INFO L225 Difference]: With dead ends: 109 [2022-12-14 12:01:57,023 INFO L226 Difference]: Without dead ends: 65 [2022-12-14 12:01:57,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=161, Invalid=2095, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 12:01:57,024 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 51 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 12:01:57,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 325 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 12:01:57,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-14 12:01:57,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-12-14 12:01:57,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 18 states have call successors, (18), 9 states have call predecessors, (18), 10 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-12-14 12:01:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-12-14 12:01:57,030 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 37 [2022-12-14 12:01:57,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:01:57,030 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-12-14 12:01:57,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 12:01:57,030 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-12-14 12:01:57,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 12:01:57,031 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:01:57,031 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:01:57,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:01:57,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:01:57,233 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:01:57,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:01:57,234 INFO L85 PathProgramCache]: Analyzing trace with hash 307653960, now seen corresponding path program 1 times [2022-12-14 12:01:57,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:01:57,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322128142] [2022-12-14 12:01:57,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:01:57,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:01:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:01:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:01:57,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:01:57,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322128142] [2022-12-14 12:01:57,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322128142] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:01:57,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175110723] [2022-12-14 12:01:57,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:01:57,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:01:57,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:01:57,515 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:01:57,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20f46de1-78d3-4590-8e47-3417af3ec642/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:01:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:01:57,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 12:01:57,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:01:57,766 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 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 12:01:57,783 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 21 treesize of output 20 [2022-12-14 12:01:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:01:58,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:01:58,529 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 22 treesize of output 20 [2022-12-14 12:01:58,532 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 54 treesize of output 50 [2022-12-14 12:01:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 12:01:58,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175110723] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:01:58,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [79058467] [2022-12-14 12:01:58,579 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 12:01:58,579 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:01:58,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:01:58,579 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:01:58,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:01:58,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,740 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-12-14 12:01:58,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 65 treesize of output 113 [2022-12-14 12:01:58,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 26 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 91 [2022-12-14 12:01:58,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 37 [2022-12-14 12:01:58,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,809 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 30 treesize of output 21 [2022-12-14 12:01:58,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 26 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 91 [2022-12-14 12:01:58,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 24 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 48 [2022-12-14 12:01:58,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:58,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 16 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 26 [2022-12-14 12:01:58,946 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_remove with input of size 170 for LOIs [2022-12-14 12:01:59,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:59,670 INFO L321 Elim1Store]: treesize reduction 327, result has 24.8 percent of original size [2022-12-14 12:01:59,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 726 treesize of output 493 [2022-12-14 12:01:59,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:01:59,891 INFO L321 Elim1Store]: treesize reduction 387, result has 27.1 percent of original size [2022-12-14 12:01:59,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 637 treesize of output 599 [2022-12-14 12:01:59,953 INFO L321 Elim1Store]: treesize reduction 97, result has 45.5 percent of original size [2022-12-14 12:01:59,953 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 139 treesize of output 81 [2022-12-14 12:02:00,011 INFO L321 Elim1Store]: treesize reduction 97, result has 45.5 percent of original size [2022-12-14 12:02:00,012 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 139 treesize of output 81