./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 00:32:14,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:32:14,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:32:14,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:32:14,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:32:14,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:32:14,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:32:14,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:32:14,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:32:14,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:32:14,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:32:14,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:32:14,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:32:14,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:32:14,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:32:14,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:32:14,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:32:14,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:32:14,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:32:14,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:32:14,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:32:14,193 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:32:14,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:32:14,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:32:14,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:32:14,201 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:32:14,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:32:14,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:32:14,203 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:32:14,204 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:32:14,204 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:32:14,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:32:14,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:32:14,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:32:14,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:32:14,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:32:14,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:32:14,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:32:14,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:32:14,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:32:14,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:32:14,219 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-22 00:32:14,261 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:32:14,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:32:14,262 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:32:14,262 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:32:14,263 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:32:14,263 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:32:14,263 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:32:14,264 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:32:14,264 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:32:14,264 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:32:14,264 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:32:14,265 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:32:14,265 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:32:14,265 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:32:14,266 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:32:14,266 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:32:14,274 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:32:14,275 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:32:14,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:32:14,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:32:14,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:32:14,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:32:14,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:32:14,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:32:14,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:32:14,277 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:32:14,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:32:14,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:32:14,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:32:14,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:32:14,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:32:14,279 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:32:14,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:32:14,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:32:14,280 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:32:14,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:32:14,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:32:14,281 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:32:14,281 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_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 [2022-11-22 00:32:14,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:32:14,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:32:14,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:32:14,655 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:32:14,656 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:32:14,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2022-11-22 00:32:17,750 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:32:18,265 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:32:18,266 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2022-11-22 00:32:18,298 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/data/2bc6ef35a/55bdb4b4db68489fac19c4cb83b4f744/FLAG48d97454c [2022-11-22 00:32:18,314 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/data/2bc6ef35a/55bdb4b4db68489fac19c4cb83b4f744 [2022-11-22 00:32:18,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:32:18,318 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:32:18,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:32:18,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:32:18,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:32:18,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:32:18" (1/1) ... [2022-11-22 00:32:18,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59500f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:18, skipping insertion in model container [2022-11-22 00:32:18,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:32:18" (1/1) ... [2022-11-22 00:32:18,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:32:18,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:32:18,690 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_522b41cd-a73e-4a9c-ba99-e03da42430af/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2022-11-22 00:32:18,699 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_522b41cd-a73e-4a9c-ba99-e03da42430af/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2022-11-22 00:32:19,874 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:19,875 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:19,875 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:19,877 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:19,878 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:19,894 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:19,901 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:19,912 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:19,913 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:19,918 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:19,922 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:19,923 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:19,924 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:20,444 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-22 00:32:20,446 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-22 00:32:20,447 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-22 00:32:20,449 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-22 00:32:20,451 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-22 00:32:20,452 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-22 00:32:20,453 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-22 00:32:20,454 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-22 00:32:20,455 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-22 00:32:20,456 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-22 00:32:20,679 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-22 00:32:20,768 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:32:20,787 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:32:20,803 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_522b41cd-a73e-4a9c-ba99-e03da42430af/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2022-11-22 00:32:20,804 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_522b41cd-a73e-4a9c-ba99-e03da42430af/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2022-11-22 00:32:20,851 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:20,851 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:20,852 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:20,852 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:20,853 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:20,862 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:20,862 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:20,864 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:20,866 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:20,868 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:20,869 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:20,869 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:20,869 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 00:32:20,911 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-22 00:32:20,914 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-22 00:32:20,915 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-22 00:32:20,916 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-22 00:32:20,923 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-22 00:32:20,923 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-22 00:32:20,925 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-22 00:32:20,925 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-22 00:32:20,926 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-22 00:32:20,926 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-22 00:32:20,970 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-22 00:32:20,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:32:21,232 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:32:21,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:21 WrapperNode [2022-11-22 00:32:21,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:32:21,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:32:21,234 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:32:21,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:32:21,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:21" (1/1) ... [2022-11-22 00:32:21,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:21" (1/1) ... [2022-11-22 00:32:21,380 INFO L138 Inliner]: procedures = 679, calls = 1039, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 135 [2022-11-22 00:32:21,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:32:21,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:32:21,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:32:21,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:32:21,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:21" (1/1) ... [2022-11-22 00:32:21,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:21" (1/1) ... [2022-11-22 00:32:21,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:21" (1/1) ... [2022-11-22 00:32:21,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:21" (1/1) ... [2022-11-22 00:32:21,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:21" (1/1) ... [2022-11-22 00:32:21,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:21" (1/1) ... [2022-11-22 00:32:21,473 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:21" (1/1) ... [2022-11-22 00:32:21,475 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:21" (1/1) ... [2022-11-22 00:32:21,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:32:21,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:32:21,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:32:21,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:32:21,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:21" (1/1) ... [2022-11-22 00:32:21,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:32:21,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:32:21,536 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:32:21,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:32:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 00:32:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 00:32:21,586 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 00:32:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-22 00:32:21,587 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-22 00:32:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 00:32:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-22 00:32:21,587 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-22 00:32:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:32:21,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 00:32:21,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:32:21,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:32:21,590 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 00:32:21,590 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 00:32:21,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 00:32:21,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 00:32:21,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 00:32:21,591 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-22 00:32:21,591 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-22 00:32:21,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:32:21,867 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:32:21,870 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:32:22,218 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:32:22,419 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:32:22,420 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 00:32:22,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:32:22 BoogieIcfgContainer [2022-11-22 00:32:22,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:32:22,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:32:22,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:32:22,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:32:22,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:32:18" (1/3) ... [2022-11-22 00:32:22,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2893a2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:32:22, skipping insertion in model container [2022-11-22 00:32:22,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:32:21" (2/3) ... [2022-11-22 00:32:22,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2893a2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:32:22, skipping insertion in model container [2022-11-22 00:32:22,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:32:22" (3/3) ... [2022-11-22 00:32:22,434 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rend_harness.i [2022-11-22 00:32:22,451 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:32:22,451 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:32:22,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:32:22,513 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;@69079abe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:32:22,513 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:32:22,518 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-22 00:32:22,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 00:32:22,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:32:22,529 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:32:22,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:32:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:32:22,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1338419167, now seen corresponding path program 1 times [2022-11-22 00:32:22,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:32:22,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425620555] [2022-11-22 00:32:22,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:22,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:32:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:32:23,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:32:23,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425620555] [2022-11-22 00:32:23,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425620555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:32:23,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843897698] [2022-11-22 00:32:23,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:23,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:23,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:32:23,361 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:32:23,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:32:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:23,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-22 00:32:23,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:32:23,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-22 00:32:23,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-22 00:32:24,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:24,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:24,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:24,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-11-22 00:32:24,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:24,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:24,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:24,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-11-22 00:32:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:32:25,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:32:25,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843897698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:32:25,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:32:25,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2022-11-22 00:32:25,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219189161] [2022-11-22 00:32:25,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:32:25,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:32:25,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:32:25,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:32:25,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-22 00:32:25,885 INFO L87 Difference]: Start difference. First operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-22 00:32:26,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:32:26,797 INFO L93 Difference]: Finished difference Result 121 states and 170 transitions. [2022-11-22 00:32:26,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 00:32:26,800 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-11-22 00:32:26,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:32:26,811 INFO L225 Difference]: With dead ends: 121 [2022-11-22 00:32:26,811 INFO L226 Difference]: Without dead ends: 81 [2022-11-22 00:32:26,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:32:26,827 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 46 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 00:32:26,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 211 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 00:32:26,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-22 00:32:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-11-22 00:32:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 47 states have internal predecessors, (58), 24 states have call successors, (24), 9 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-11-22 00:32:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2022-11-22 00:32:26,920 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 37 [2022-11-22 00:32:26,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:32:26,921 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2022-11-22 00:32:26,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-22 00:32:26,921 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2022-11-22 00:32:26,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 00:32:26,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:32:26,927 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:32:26,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-22 00:32:27,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-22 00:32:27,134 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:32:27,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:32:27,134 INFO L85 PathProgramCache]: Analyzing trace with hash 2113362132, now seen corresponding path program 1 times [2022-11-22 00:32:27,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:32:27,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836318032] [2022-11-22 00:32:27,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:27,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:32:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 00:32:27,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:32:27,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836318032] [2022-11-22 00:32:27,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836318032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:32:27,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823450010] [2022-11-22 00:32:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:27,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:27,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:32:27,506 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:32:27,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:32:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:27,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-22 00:32:27,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:32:27,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-22 00:32:27,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-22 00:32:27,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:27,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:27,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-22 00:32:27,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:27,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-22 00:32:27,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:27,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:27,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-22 00:32:27,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:27,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-22 00:32:28,101 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-22 00:32:28,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 141 [2022-11-22 00:32:28,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:28,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:28,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:28,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 125 [2022-11-22 00:32:28,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:28,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:28,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-22 00:32:28,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:28,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:28,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:28,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 44 [2022-11-22 00:32:28,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-22 00:32:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:32:29,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:32:33,579 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 16 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|)) (.cse2 (+ 8 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|)) (.cse0 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (and (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse1) 0)) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|))))) (or (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse1) 0)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)) (let ((.cse3 (+ |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 24))) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse3) 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse3) 0))))))) is different from false [2022-11-22 00:32:33,713 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ 16 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|)) (.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0))) (.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse5 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse2 (+ 8 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|))) (and (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)))) (or (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_212 Int)) (or (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse3) 0)) (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse4 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse3) 0)))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|) 0))) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse6 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse6 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|) 0))))) (forall ((v_ArrVal_212 Int)) (let ((.cse8 (+ |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 24))) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse7 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse7 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse8) 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse8) 0)))))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse9 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse9 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)))))) is different from false [2022-11-22 00:32:33,792 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:32:33,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-11-22 00:32:33,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:32:33,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 167 [2022-11-22 00:32:33,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 148 [2022-11-22 00:32:33,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 69 [2022-11-22 00:32:33,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 00:32:33,921 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:32:33,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 80 [2022-11-22 00:32:34,005 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-22 00:32:34,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-22 00:32:34,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:32:34,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-11-22 00:32:34,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:34,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:34,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-11-22 00:32:34,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:32:34,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-11-22 00:32:34,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:34,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 68 [2022-11-22 00:32:34,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:34,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:34,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:34,078 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-22 00:32:34,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 44 [2022-11-22 00:32:34,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:34,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-22 00:32:34,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:34,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:34,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:34,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 00:32:34,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:34,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:34,121 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-22 00:32:34,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-22 00:32:34,132 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 00:32:34,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:34,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:34,142 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-22 00:32:34,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-22 00:32:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-11-22 00:32:34,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823450010] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:32:34,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1323931304] [2022-11-22 00:32:34,260 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-22 00:32:34,261 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:32:34,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:32:34,269 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:32:34,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:32:34,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:34,383 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 00:32:34,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-22 00:32:34,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:34,457 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 00:32:34,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 00:32:34,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:34,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:34,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:34,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:34,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:34,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:32:34,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-22 00:32:34,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:34,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 00:32:34,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:34,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:34,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:34,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:34,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:32:35,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,158 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 00:32:35,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-22 00:32:35,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 00:32:35,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:35,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 00:32:35,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:32:35,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-22 00:32:35,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 00:32:35,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:35,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:35,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:35,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:35,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:35,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:35,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:36,139 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-22 00:32:36,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-11-22 00:32:36,597 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-11-22 00:32:36,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 650 treesize of output 680 [2022-11-22 00:32:36,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:36,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:36,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:36,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:36,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:36,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:36,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:36,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:36,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:36,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:36,973 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-22 00:32:36,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 14 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 678 treesize of output 687 [2022-11-22 00:32:37,132 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-11-22 00:32:37,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 645 treesize of output 656 [2022-11-22 00:32:37,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:37,207 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-22 00:32:37,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 682 treesize of output 635 [2022-11-22 00:32:37,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 656 treesize of output 635 [2022-11-22 00:32:45,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:45,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 00:32:46,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:46,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 00:32:46,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:46,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-22 00:32:46,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:46,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:46,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-22 00:32:46,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:46,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 00:32:46,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:32:46,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:32:46,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:46,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 00:32:46,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:46,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:46,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-22 00:32:46,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:46,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:32:46,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:32:46,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:32:46,609 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2022-11-22 00:32:46,818 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 136 for LOIs [2022-11-22 00:32:46,874 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-22 00:32:46,895 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:32:50,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1323931304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:32:50,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:32:50,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 9, 8] total 30 [2022-11-22 00:32:50,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862021994] [2022-11-22 00:32:50,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:32:50,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 00:32:50,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:32:50,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 00:32:50,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=666, Unknown=6, NotChecked=106, Total=870 [2022-11-22 00:32:50,202 INFO L87 Difference]: Start difference. First operand 79 states and 106 transitions. Second operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-22 00:32:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:32:52,224 INFO L93 Difference]: Finished difference Result 142 states and 188 transitions. [2022-11-22 00:32:52,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 00:32:52,225 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2022-11-22 00:32:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:32:52,226 INFO L225 Difference]: With dead ends: 142 [2022-11-22 00:32:52,226 INFO L226 Difference]: Without dead ends: 105 [2022-11-22 00:32:52,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=113, Invalid=819, Unknown=6, NotChecked=118, Total=1056 [2022-11-22 00:32:52,231 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:32:52,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 195 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 00:32:52,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-22 00:32:52,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2022-11-22 00:32:52,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 66 states have internal predecessors, (86), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-22 00:32:52,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2022-11-22 00:32:52,266 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 38 [2022-11-22 00:32:52,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:32:52,267 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2022-11-22 00:32:52,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-22 00:32:52,267 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2022-11-22 00:32:52,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-22 00:32:52,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:32:52,269 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:32:52,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-22 00:32:52,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:52,475 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:32:52,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:32:52,475 INFO L85 PathProgramCache]: Analyzing trace with hash -303925925, now seen corresponding path program 1 times [2022-11-22 00:32:52,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:32:52,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725634874] [2022-11-22 00:32:52,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:52,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:32:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:32:52,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:32:52,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725634874] [2022-11-22 00:32:52,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725634874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:32:52,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240884612] [2022-11-22 00:32:52,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:52,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:52,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:32:52,671 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:32:52,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:32:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:52,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 00:32:52,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:32:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:32:52,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:32:52,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240884612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:32:52,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:32:52,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-22 00:32:52,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606973003] [2022-11-22 00:32:52,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:32:52,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:32:52,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:32:52,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:32:52,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-22 00:32:52,962 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:32:53,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:32:53,168 INFO L93 Difference]: Finished difference Result 209 states and 279 transitions. [2022-11-22 00:32:53,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:32:53,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 39 [2022-11-22 00:32:53,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:32:53,170 INFO L225 Difference]: With dead ends: 209 [2022-11-22 00:32:53,170 INFO L226 Difference]: Without dead ends: 113 [2022-11-22 00:32:53,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:32:53,172 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:32:53,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 144 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:32:53,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-22 00:32:53,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2022-11-22 00:32:53,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 66 states have internal predecessors, (84), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-22 00:32:53,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2022-11-22 00:32:53,221 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 39 [2022-11-22 00:32:53,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:32:53,221 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2022-11-22 00:32:53,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:32:53,222 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2022-11-22 00:32:53,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 00:32:53,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:32:53,230 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:32:53,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:32:53,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:53,437 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:32:53,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:32:53,437 INFO L85 PathProgramCache]: Analyzing trace with hash 840951937, now seen corresponding path program 1 times [2022-11-22 00:32:53,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:32:53,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042917444] [2022-11-22 00:32:53,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:53,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:32:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:32:53,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:32:53,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042917444] [2022-11-22 00:32:53,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042917444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:32:53,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103594578] [2022-11-22 00:32:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:53,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:53,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:32:53,627 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:32:53,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:32:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:53,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 00:32:53,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:32:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:32:53,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:32:53,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103594578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:32:53,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:32:53,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-22 00:32:53,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632485850] [2022-11-22 00:32:53,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:32:53,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:32:53,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:32:53,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:32:53,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:32:53,894 INFO L87 Difference]: Start difference. First operand 103 states and 135 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:32:54,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:32:54,215 INFO L93 Difference]: Finished difference Result 251 states and 339 transitions. [2022-11-22 00:32:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 00:32:54,216 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2022-11-22 00:32:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:32:54,217 INFO L225 Difference]: With dead ends: 251 [2022-11-22 00:32:54,217 INFO L226 Difference]: Without dead ends: 153 [2022-11-22 00:32:54,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-22 00:32:54,219 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 62 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:32:54,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 167 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:32:54,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-22 00:32:54,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 105. [2022-11-22 00:32:54,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.323076923076923) internal successors, (86), 68 states have internal predecessors, (86), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-22 00:32:54,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 137 transitions. [2022-11-22 00:32:54,292 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 137 transitions. Word has length 41 [2022-11-22 00:32:54,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:32:54,292 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 137 transitions. [2022-11-22 00:32:54,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:32:54,292 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 137 transitions. [2022-11-22 00:32:54,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 00:32:54,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:32:54,294 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:32:54,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:32:54,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:54,494 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:32:54,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:32:54,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1878159694, now seen corresponding path program 1 times [2022-11-22 00:32:54,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:32:54,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561260755] [2022-11-22 00:32:54,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:54,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:32:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:32:54,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:32:54,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561260755] [2022-11-22 00:32:54,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561260755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:32:54,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586504010] [2022-11-22 00:32:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:54,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:54,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:32:54,806 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:32:54,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:32:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:55,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 00:32:55,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:32:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 00:32:55,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:32:55,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586504010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:32:55,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:32:55,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-22 00:32:55,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870812951] [2022-11-22 00:32:55,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:32:55,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:32:55,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:32:55,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:32:55,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:32:55,029 INFO L87 Difference]: Start difference. First operand 105 states and 137 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:32:55,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:32:55,117 INFO L93 Difference]: Finished difference Result 225 states and 311 transitions. [2022-11-22 00:32:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:32:55,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-11-22 00:32:55,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:32:55,124 INFO L225 Difference]: With dead ends: 225 [2022-11-22 00:32:55,124 INFO L226 Difference]: Without dead ends: 133 [2022-11-22 00:32:55,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:32:55,131 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:32:55,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:32:55,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-22 00:32:55,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2022-11-22 00:32:55,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 71 states have (on average 1.323943661971831) internal successors, (94), 74 states have internal predecessors, (94), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-22 00:32:55,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 145 transitions. [2022-11-22 00:32:55,189 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 145 transitions. Word has length 42 [2022-11-22 00:32:55,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:32:55,191 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 145 transitions. [2022-11-22 00:32:55,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-22 00:32:55,191 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 145 transitions. [2022-11-22 00:32:55,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-22 00:32:55,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:32:55,196 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:32:55,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:32:55,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:55,404 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:32:55,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:32:55,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1695628998, now seen corresponding path program 1 times [2022-11-22 00:32:55,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:32:55,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906128768] [2022-11-22 00:32:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:55,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:32:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:32:55,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:32:55,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906128768] [2022-11-22 00:32:55,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906128768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:32:55,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105263146] [2022-11-22 00:32:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:32:55,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:55,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:32:55,666 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:32:55,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:32:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:55,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-22 00:32:55,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:32:55,995 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-22 00:32:55,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-22 00:32:56,016 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 00:32:56,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-22 00:32:56,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 00:32:56,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-22 00:32:56,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:32:56,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2022-11-22 00:32:56,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:33:11,731 WARN L233 SmtUtils]: Spent 13.69s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:33:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:33:14,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:33:19,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105263146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:19,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [184788384] [2022-11-22 00:33:19,146 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-22 00:33:19,146 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:33:19,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:33:19,147 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:33:19,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:33:19,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,218 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 00:33:19,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-22 00:33:19,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,293 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 00:33:19,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 00:33:19,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:33:19,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-22 00:33:19,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:33:19,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 00:33:19,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-22 00:33:19,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 00:33:19,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:33:19,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:19,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 00:33:20,529 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 130 for LOIs [2022-11-22 00:33:21,183 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 170 for LOIs [2022-11-22 00:33:21,248 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-22 00:33:21,266 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-22 00:33:21,332 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:33:28,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [184788384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:33:28,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:33:28,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14, 8] total 42 [2022-11-22 00:33:28,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426928412] [2022-11-22 00:33:28,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:33:28,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 00:33:28,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:33:28,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 00:33:28,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 00:33:28,609 INFO L87 Difference]: Start difference. First operand 111 states and 145 transitions. Second operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 00:33:33,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:33,038 INFO L93 Difference]: Finished difference Result 172 states and 221 transitions. [2022-11-22 00:33:33,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 00:33:33,039 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2022-11-22 00:33:33,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:33,041 INFO L225 Difference]: With dead ends: 172 [2022-11-22 00:33:33,041 INFO L226 Difference]: Without dead ends: 121 [2022-11-22 00:33:33,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=256, Invalid=1906, Unknown=0, NotChecked=0, Total=2162 [2022-11-22 00:33:33,043 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 80 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:33,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 362 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-22 00:33:33,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-22 00:33:33,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-11-22 00:33:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 75 states have (on average 1.32) internal successors, (99), 79 states have internal predecessors, (99), 27 states have call successors, (27), 13 states have call predecessors, (27), 15 states have return successors, (27), 25 states have call predecessors, (27), 25 states have call successors, (27) [2022-11-22 00:33:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 153 transitions. [2022-11-22 00:33:33,096 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 153 transitions. Word has length 45 [2022-11-22 00:33:33,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:33,097 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 153 transitions. [2022-11-22 00:33:33,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 00:33:33,097 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 153 transitions. [2022-11-22 00:33:33,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 00:33:33,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:33,098 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:33:33,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:33,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-22 00:33:33,305 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:33:33,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:33,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1964135121, now seen corresponding path program 1 times [2022-11-22 00:33:33,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:33,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381902700] [2022-11-22 00:33:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:33,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 00:33:33,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:33:33,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381902700] [2022-11-22 00:33:33,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381902700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:33:33,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402511202] [2022-11-22 00:33:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:33,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:33,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:33:33,629 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:33:33,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 00:33:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:33:33,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-22 00:33:33,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:33:34,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-22 00:33:34,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:34,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 00:33:34,079 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-22 00:33:34,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 115 [2022-11-22 00:33:34,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:34,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 91 [2022-11-22 00:33:34,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:34,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-22 00:33:34,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-22 00:33:34,216 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|))) (let ((.cse0 (select .cse1 24))) (and (not (= .cse0 0)) (= (select .cse1 0) .cse0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| v_DerPreprocessor_21) .cse0 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| v_DerPreprocessor_21) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= .cse0 (select v_DerPreprocessor_21 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|) (<= (+ 2 .cse0) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|))))) is different from true [2022-11-22 00:33:42,870 WARN L233 SmtUtils]: Spent 5.07s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:33:44,348 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49| Int) (v_DerPreprocessor_22 (Array Int Int)) (v_DerPreprocessor_23 (Array Int Int))) (let ((.cse2 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|))) (let ((.cse1 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|)) (.cse0 (select .cse2 24))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_22) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49| v_DerPreprocessor_23) .cse0 v_DerPreprocessor_22) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49| v_DerPreprocessor_23) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= (select .cse1 8) 0) (not (= .cse0 0)) (= (select .cse1 16) 0) (= (select .cse2 8) 0) (= .cse0 (select v_DerPreprocessor_23 24)) (= .cse0 (select .cse2 0)) (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|) (= (select .cse2 16) 0) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|))))) (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| Int)) (let ((.cse4 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|))) (let ((.cse3 (select .cse4 24))) (and (not (= .cse3 0)) (= (select .cse4 0) .cse3) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse3 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| v_DerPreprocessor_21) .cse3 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| v_DerPreprocessor_21) .cse3) (select |c_#memory_$Pointer$.base| .cse3)) (= .cse3 (select v_DerPreprocessor_21 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|) (<= (+ 2 .cse3) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|)))))) is different from true [2022-11-22 00:33:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-11-22 00:33:49,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:33:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 00:33:53,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402511202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:33:53,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [507551862] [2022-11-22 00:33:53,783 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-22 00:33:53,784 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:33:53,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:33:53,784 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:33:53,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:33:53,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:53,854 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 00:33:53,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 00:33:53,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:53,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-22 00:33:54,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-22 00:33:54,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:33:54,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:33:54,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 00:33:54,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:33:54,255 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 00:33:54,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-22 00:33:54,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 00:33:54,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,372 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 00:33:54,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-22 00:33:54,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:33:54,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 00:33:54,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:33:54,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-22 00:33:54,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:33:54,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:33:54,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:33:54,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 00:33:54,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-22 00:33:54,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 00:33:54,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 00:33:54,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:33:54,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:33:54,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 00:33:54,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-22 00:33:54,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-22 00:33:54,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:33:54,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-22 00:33:54,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-22 00:33:54,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 00:33:54,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:33:54,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:33:54,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:33:55,948 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-22 00:33:56,365 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 156 for LOIs [2022-11-22 00:33:56,420 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-22 00:33:56,439 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-22 00:33:56,511 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:34:03,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [507551862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:34:03,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:34:03,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 23, 8] total 52 [2022-11-22 00:34:03,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300803711] [2022-11-22 00:34:03,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:34:03,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 00:34:03,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:34:03,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 00:34:03,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2202, Unknown=71, NotChecked=194, Total=2652 [2022-11-22 00:34:03,190 INFO L87 Difference]: Start difference. First operand 118 states and 153 transitions. Second operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 00:34:07,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:34:07,048 INFO L93 Difference]: Finished difference Result 178 states and 229 transitions. [2022-11-22 00:34:07,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 00:34:07,049 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2022-11-22 00:34:07,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:34:07,050 INFO L225 Difference]: With dead ends: 178 [2022-11-22 00:34:07,050 INFO L226 Difference]: Without dead ends: 125 [2022-11-22 00:34:07,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=237, Invalid=2775, Unknown=76, NotChecked=218, Total=3306 [2022-11-22 00:34:07,052 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 34 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:34:07,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 206 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 00:34:07,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-22 00:34:07,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-11-22 00:34:07,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 78 states have (on average 1.3205128205128205) internal successors, (103), 82 states have internal predecessors, (103), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-11-22 00:34:07,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 159 transitions. [2022-11-22 00:34:07,097 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 159 transitions. Word has length 46 [2022-11-22 00:34:07,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:34:07,098 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 159 transitions. [2022-11-22 00:34:07,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 00:34:07,098 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 159 transitions. [2022-11-22 00:34:07,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 00:34:07,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:34:07,099 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:34:07,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 00:34:07,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 00:34:07,300 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:34:07,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:34:07,300 INFO L85 PathProgramCache]: Analyzing trace with hash -850872160, now seen corresponding path program 1 times [2022-11-22 00:34:07,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:34:07,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388800591] [2022-11-22 00:34:07,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:34:07,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:34:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:34:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:34:08,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:34:08,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388800591] [2022-11-22 00:34:08,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388800591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:34:08,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375662802] [2022-11-22 00:34:08,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:34:08,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:34:08,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:34:08,011 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:34:08,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 00:34:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:34:08,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-22 00:34:08,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:34:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 00:34:10,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:34:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:34:11,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375662802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:34:11,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1372530488] [2022-11-22 00:34:11,074 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 00:34:11,075 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:34:11,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:34:11,075 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:34:11,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:34:11,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,131 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 00:34:11,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-22 00:34:11,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,191 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 00:34:11,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 00:34:11,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-22 00:34:11,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:34:11,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 00:34:11,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:34:11,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-22 00:34:11,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:34:11,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 00:34:11,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:11,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 00:34:12,321 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 128 for LOIs [2022-11-22 00:34:13,266 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 173 for LOIs [2022-11-22 00:34:13,335 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-22 00:34:13,351 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 00:34:13,409 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:34:20,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1372530488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:34:20,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:34:20,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-22 00:34:20,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665023129] [2022-11-22 00:34:20,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:34:20,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 00:34:20,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:34:20,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 00:34:20,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 00:34:20,558 INFO L87 Difference]: Start difference. First operand 123 states and 159 transitions. Second operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 00:34:26,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:34:26,235 INFO L93 Difference]: Finished difference Result 191 states and 243 transitions. [2022-11-22 00:34:26,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 00:34:26,236 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 47 [2022-11-22 00:34:26,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:34:26,237 INFO L225 Difference]: With dead ends: 191 [2022-11-22 00:34:26,237 INFO L226 Difference]: Without dead ends: 133 [2022-11-22 00:34:26,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 00:34:26,238 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 130 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-22 00:34:26,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 204 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-22 00:34:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-22 00:34:26,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2022-11-22 00:34:26,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 79 states have (on average 1.3164556962025316) internal successors, (104), 83 states have internal predecessors, (104), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-11-22 00:34:26,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2022-11-22 00:34:26,302 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 47 [2022-11-22 00:34:26,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:34:26,303 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2022-11-22 00:34:26,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-22 00:34:26,303 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2022-11-22 00:34:26,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-22 00:34:26,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:34:26,304 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:34:26,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 00:34:26,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-22 00:34:26,511 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:34:26,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:34:26,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1509868147, now seen corresponding path program 1 times [2022-11-22 00:34:26,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:34:26,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934487984] [2022-11-22 00:34:26,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:34:26,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:34:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:34:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 00:34:26,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:34:26,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934487984] [2022-11-22 00:34:26,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934487984] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:34:26,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065202284] [2022-11-22 00:34:26,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:34:26,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:34:26,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:34:26,715 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:34:26,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 00:34:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:34:26,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-22 00:34:26,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:34:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 00:34:31,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:34:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:34:36,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065202284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:34:36,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1537878118] [2022-11-22 00:34:36,253 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 00:34:36,253 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:34:36,253 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:34:36,253 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:34:36,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:34:36,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,327 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 00:34:36,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-22 00:34:36,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,386 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 00:34:36,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 00:34:36,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 00:34:36,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:34:36,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:34:36,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-22 00:34:36,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 00:34:36,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-22 00:34:36,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 00:34:36,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:34:36,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:34:38,280 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 126 for LOIs [2022-11-22 00:34:38,351 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-22 00:34:39,050 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-22 00:34:39,051 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-22 00:34:39,067 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 00:34:39,121 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:34:51,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5587#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| Int)) (and (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| 0)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 24))) (<= 0 |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 8) 0) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| 4)) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 1) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| 2)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| 3)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 24) 0) (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 24)) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 24)) |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 16) 0))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:34:51,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:34:51,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:34:51,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 11] total 26 [2022-11-22 00:34:51,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625483889] [2022-11-22 00:34:51,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:34:51,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 00:34:51,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:34:51,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 00:34:51,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2438, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 00:34:51,602 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 10 states have call successors, (22), 4 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-22 00:34:53,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:34:55,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:35:00,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:35:00,120 INFO L93 Difference]: Finished difference Result 460 states and 620 transitions. [2022-11-22 00:35:00,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-22 00:35:00,121 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 10 states have call successors, (22), 4 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 48 [2022-11-22 00:35:00,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:35:00,124 INFO L225 Difference]: With dead ends: 460 [2022-11-22 00:35:00,124 INFO L226 Difference]: Without dead ends: 353 [2022-11-22 00:35:00,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 94 SyntacticMatches, 10 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=501, Invalid=4191, Unknown=0, NotChecked=0, Total=4692 [2022-11-22 00:35:00,127 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 224 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 187 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:35:00,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 348 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 949 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2022-11-22 00:35:00,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-22 00:35:00,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 186. [2022-11-22 00:35:00,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 121 states have (on average 1.2396694214876034) internal successors, (150), 128 states have internal predecessors, (150), 40 states have call successors, (40), 20 states have call predecessors, (40), 24 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2022-11-22 00:35:00,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 233 transitions. [2022-11-22 00:35:00,238 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 233 transitions. Word has length 48 [2022-11-22 00:35:00,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:35:00,238 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 233 transitions. [2022-11-22 00:35:00,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 10 states have call successors, (22), 4 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-22 00:35:00,239 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 233 transitions. [2022-11-22 00:35:00,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-22 00:35:00,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:35:00,241 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:35:00,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-22 00:35:00,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:35:00,446 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:35:00,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:35:00,447 INFO L85 PathProgramCache]: Analyzing trace with hash 557997523, now seen corresponding path program 1 times [2022-11-22 00:35:00,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:35:00,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148293259] [2022-11-22 00:35:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:35:00,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:35:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:35:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 00:35:00,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:35:00,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148293259] [2022-11-22 00:35:00,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148293259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:35:00,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741327622] [2022-11-22 00:35:00,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:35:00,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:35:00,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:35:00,672 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:35:00,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 00:35:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:35:00,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 00:35:00,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:35:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 00:35:01,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:35:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-22 00:35:01,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741327622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:35:01,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [758803112] [2022-11-22 00:35:01,232 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 00:35:01,232 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:35:01,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:35:01,233 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:35:01,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:35:01,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,313 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 00:35:01,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 00:35:01,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-22 00:35:01,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-22 00:35:01,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 00:35:01,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:35:01,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:35:01,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-22 00:35:01,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:35:01,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 00:35:01,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:01,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 00:35:11,336 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 145 for LOIs [2022-11-22 00:35:11,603 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-22 00:35:12,319 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-22 00:35:12,321 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-22 00:35:12,337 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 00:35:12,397 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:35:30,181 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6985#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31| Int)) (and (<= 0 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 24)) 0) 16) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 24) 0) (not (= 2 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) (not (= 3 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 16) 0) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 1) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 24)) 0) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) (not (= 0 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 24)) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 24) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 16) 0) (not (= 4 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 8) 0))) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:35:30,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:35:30,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:35:30,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 14 [2022-11-22 00:35:30,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399304377] [2022-11-22 00:35:30,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:35:30,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 00:35:30,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:35:30,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 00:35:30,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2022-11-22 00:35:30,184 INFO L87 Difference]: Start difference. First operand 186 states and 233 transitions. Second operand has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 00:35:30,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:35:30,667 INFO L93 Difference]: Finished difference Result 392 states and 488 transitions. [2022-11-22 00:35:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 00:35:30,668 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 64 [2022-11-22 00:35:30,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:35:30,671 INFO L225 Difference]: With dead ends: 392 [2022-11-22 00:35:30,671 INFO L226 Difference]: Without dead ends: 234 [2022-11-22 00:35:30,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 152 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=198, Invalid=1694, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 00:35:30,673 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:35:30,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 524 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:35:30,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-22 00:35:30,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 195. [2022-11-22 00:35:30,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 127 states have (on average 1.2283464566929134) internal successors, (156), 137 states have internal predecessors, (156), 40 states have call successors, (40), 20 states have call predecessors, (40), 27 states have return successors, (46), 37 states have call predecessors, (46), 37 states have call successors, (46) [2022-11-22 00:35:30,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 242 transitions. [2022-11-22 00:35:30,781 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 242 transitions. Word has length 64 [2022-11-22 00:35:30,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:35:30,782 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 242 transitions. [2022-11-22 00:35:30,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 00:35:30,782 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 242 transitions. [2022-11-22 00:35:30,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-22 00:35:30,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:35:30,784 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:35:30,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 00:35:30,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:35:30,990 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:35:30,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:35:30,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1356635027, now seen corresponding path program 1 times [2022-11-22 00:35:30,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:35:30,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502086694] [2022-11-22 00:35:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:35:30,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:35:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:35:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 00:35:31,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:35:31,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502086694] [2022-11-22 00:35:31,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502086694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:35:31,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940482203] [2022-11-22 00:35:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:35:31,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:35:31,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:35:31,756 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:35:31,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 00:35:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:35:32,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-22 00:35:32,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:35:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:35:32,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:35:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-22 00:35:32,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940482203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:35:32,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1557829026] [2022-11-22 00:35:32,675 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 00:35:32,675 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:35:32,675 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:35:32,676 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:35:32,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:35:32,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:32,754 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 00:35:32,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-22 00:35:32,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:32,829 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 00:35:32,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 00:35:33,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-22 00:35:33,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:35:33,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 00:35:33,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:35:33,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:35:33,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-22 00:35:33,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 00:35:33,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:35:33,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 00:35:34,772 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 129 for LOIs [2022-11-22 00:35:34,842 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 17 for LOIs [2022-11-22 00:35:35,467 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-22 00:35:35,469 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-22 00:35:35,486 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 00:35:35,551 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:35:48,502 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8291#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64| Int)) (and (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) 24) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) 16) 0) (not (= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) (not (= 2 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0))) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0) 16) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) 8) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) 8) 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) 1) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) (= 32 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0))) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) (not (= 3 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) (not (= 4 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) 16) 0))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:35:48,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:35:48,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:35:48,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 26 [2022-11-22 00:35:48,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261813488] [2022-11-22 00:35:48,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:35:48,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 00:35:48,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:35:48,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 00:35:48,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2517, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 00:35:48,505 INFO L87 Difference]: Start difference. First operand 195 states and 242 transitions. Second operand has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-22 00:35:50,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:35:50,548 INFO L93 Difference]: Finished difference Result 496 states and 624 transitions. [2022-11-22 00:35:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-22 00:35:50,549 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) Word has length 66 [2022-11-22 00:35:50,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:35:50,551 INFO L225 Difference]: With dead ends: 496 [2022-11-22 00:35:50,551 INFO L226 Difference]: Without dead ends: 318 [2022-11-22 00:35:50,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=523, Invalid=5483, Unknown=0, NotChecked=0, Total=6006 [2022-11-22 00:35:50,554 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 155 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 00:35:50,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 537 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 00:35:50,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-22 00:35:50,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 203. [2022-11-22 00:35:50,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 134 states have (on average 1.2313432835820894) internal successors, (165), 143 states have internal predecessors, (165), 41 states have call successors, (41), 20 states have call predecessors, (41), 27 states have return successors, (47), 39 states have call predecessors, (47), 38 states have call successors, (47) [2022-11-22 00:35:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 253 transitions. [2022-11-22 00:35:50,695 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 253 transitions. Word has length 66 [2022-11-22 00:35:50,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:35:50,696 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 253 transitions. [2022-11-22 00:35:50,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-22 00:35:50,696 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 253 transitions. [2022-11-22 00:35:50,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-22 00:35:50,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:35:50,697 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:35:50,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-22 00:35:50,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 00:35:50,905 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:35:50,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:35:50,905 INFO L85 PathProgramCache]: Analyzing trace with hash -277742896, now seen corresponding path program 2 times [2022-11-22 00:35:50,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:35:50,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654876120] [2022-11-22 00:35:50,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:35:50,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:35:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:35:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 00:35:53,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:35:53,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654876120] [2022-11-22 00:35:53,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654876120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:35:53,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904327334] [2022-11-22 00:35:53,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:35:53,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:35:53,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:35:53,419 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:35:53,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 00:35:53,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 00:35:53,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:35:53,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-22 00:35:53,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:35:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:35:56,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:36:02,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:36:02,486 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:36:02,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 46 [2022-11-22 00:36:02,493 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-22 00:36:02,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2022-11-22 00:36:03,763 INFO L321 Elim1Store]: treesize reduction 13, result has 85.1 percent of original size [2022-11-22 00:36:03,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 120 [2022-11-22 00:36:03,941 INFO L321 Elim1Store]: treesize reduction 4, result has 94.5 percent of original size [2022-11-22 00:36:03,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 146 [2022-11-22 00:36:06,719 INFO L321 Elim1Store]: treesize reduction 45, result has 2.2 percent of original size [2022-11-22 00:36:06,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 1 [2022-11-22 00:36:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 00:36:07,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904327334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:36:07,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1845031994] [2022-11-22 00:36:07,075 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 00:36:07,075 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:36:07,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:36:07,075 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:36:07,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:36:07,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,148 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 00:36:07,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 00:36:07,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-22 00:36:07,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:36:07,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-22 00:36:07,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:36:07,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 00:36:07,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 00:36:07,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-22 00:36:07,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:36:07,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:36:07,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 00:36:17,188 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 145 for LOIs [2022-11-22 00:36:17,407 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-22 00:36:18,109 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-22 00:36:18,147 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-22 00:36:18,162 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 00:36:18,222 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:36:40,854 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9827#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57| Int)) (and (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 8) 0) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 1) (<= 0 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) (not (= 0 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 24) 0) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 24)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|)) (= 16 (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 24)) 0)) (not (= 4 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 24) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 16) 0) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 24)) 0) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|))) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:36:40,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:36:40,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:36:40,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 22] total 52 [2022-11-22 00:36:40,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992317959] [2022-11-22 00:36:40,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:36:40,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-22 00:36:40,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:36:40,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-22 00:36:40,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=5888, Unknown=0, NotChecked=0, Total=6320 [2022-11-22 00:36:40,859 INFO L87 Difference]: Start difference. First operand 203 states and 253 transitions. Second operand has 52 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 44 states have internal predecessors, (95), 19 states have call successors, (30), 4 states have call predecessors, (30), 13 states have return successors, (28), 16 states have call predecessors, (28), 17 states have call successors, (28) [2022-11-22 00:36:59,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:36:59,143 INFO L93 Difference]: Finished difference Result 626 states and 819 transitions. [2022-11-22 00:36:59,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-22 00:36:59,144 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 44 states have internal predecessors, (95), 19 states have call successors, (30), 4 states have call predecessors, (30), 13 states have return successors, (28), 16 states have call predecessors, (28), 17 states have call successors, (28) Word has length 67 [2022-11-22 00:36:59,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:36:59,147 INFO L225 Difference]: With dead ends: 626 [2022-11-22 00:36:59,147 INFO L226 Difference]: Without dead ends: 462 [2022-11-22 00:36:59,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 144 SyntacticMatches, 4 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5792 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=1965, Invalid=18915, Unknown=0, NotChecked=0, Total=20880 [2022-11-22 00:36:59,153 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 647 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 3476 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 4285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 3476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-22 00:36:59,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 882 Invalid, 4285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [809 Valid, 3476 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-22 00:36:59,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-22 00:36:59,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 336. [2022-11-22 00:36:59,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 230 states have (on average 1.208695652173913) internal successors, (278), 243 states have internal predecessors, (278), 64 states have call successors, (64), 30 states have call predecessors, (64), 41 states have return successors, (79), 62 states have call predecessors, (79), 60 states have call successors, (79) [2022-11-22 00:36:59,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 421 transitions. [2022-11-22 00:36:59,426 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 421 transitions. Word has length 67 [2022-11-22 00:36:59,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:36:59,426 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 421 transitions. [2022-11-22 00:36:59,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 44 states have internal predecessors, (95), 19 states have call successors, (30), 4 states have call predecessors, (30), 13 states have return successors, (28), 16 states have call predecessors, (28), 17 states have call successors, (28) [2022-11-22 00:36:59,426 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 421 transitions. [2022-11-22 00:36:59,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 00:36:59,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:36:59,428 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:36:59,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 00:36:59,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 00:36:59,636 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:36:59,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:36:59,637 INFO L85 PathProgramCache]: Analyzing trace with hash -573706957, now seen corresponding path program 1 times [2022-11-22 00:36:59,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:36:59,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654090335] [2022-11-22 00:36:59,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:36:59,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:36:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:36:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-22 00:36:59,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:36:59,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654090335] [2022-11-22 00:36:59,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654090335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:36:59,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:36:59,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 00:36:59,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682582227] [2022-11-22 00:36:59,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:36:59,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:36:59,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:36:59,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:36:59,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:36:59,920 INFO L87 Difference]: Start difference. First operand 336 states and 421 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-22 00:37:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:37:00,378 INFO L93 Difference]: Finished difference Result 389 states and 479 transitions. [2022-11-22 00:37:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 00:37:00,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 70 [2022-11-22 00:37:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:37:00,383 INFO L225 Difference]: With dead ends: 389 [2022-11-22 00:37:00,383 INFO L226 Difference]: Without dead ends: 387 [2022-11-22 00:37:00,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-22 00:37:00,385 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:37:00,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 283 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:37:00,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-11-22 00:37:00,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 363. [2022-11-22 00:37:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 248 states have (on average 1.1935483870967742) internal successors, (296), 264 states have internal predecessors, (296), 67 states have call successors, (67), 33 states have call predecessors, (67), 47 states have return successors, (85), 65 states have call predecessors, (85), 63 states have call successors, (85) [2022-11-22 00:37:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 448 transitions. [2022-11-22 00:37:00,687 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 448 transitions. Word has length 70 [2022-11-22 00:37:00,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:37:00,689 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 448 transitions. [2022-11-22 00:37:00,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-22 00:37:00,690 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 448 transitions. [2022-11-22 00:37:00,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 00:37:00,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:37:00,696 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:37:00,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 00:37:00,696 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:37:00,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:37:00,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1081195759, now seen corresponding path program 3 times [2022-11-22 00:37:00,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:37:00,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575522675] [2022-11-22 00:37:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:37:00,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:37:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:37:02,527 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 00:37:02,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:37:02,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575522675] [2022-11-22 00:37:02,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575522675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:37:02,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159511166] [2022-11-22 00:37:02,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:37:02,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:37:02,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:37:02,531 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:37:02,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 00:37:02,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:37:02,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:37:02,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-22 00:37:02,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:37:02,960 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 00:37:02,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-22 00:37:02,976 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 00:37:02,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-22 00:37:28,298 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:37:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 00:37:28,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:37:29,562 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-22 00:37:29,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159511166] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:37:29,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1439906693] [2022-11-22 00:37:29,569 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 00:37:29,569 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:37:29,569 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:37:29,569 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:37:29,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:37:29,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:29,637 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 00:37:29,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-22 00:37:29,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:29,701 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 00:37:29,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 00:37:29,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:29,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 00:37:29,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:29,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:29,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:29,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:29,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:29,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:37:29,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-22 00:37:29,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:29,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:29,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:29,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:29,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:29,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:37:30,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:30,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:30,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:30,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:30,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:30,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-22 00:37:30,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:30,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:30,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 00:37:30,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:30,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:37:30,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:30,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:30,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:30,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:30,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:30,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:30,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:30,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:37:30,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 00:37:39,602 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 145 for LOIs [2022-11-22 00:37:39,808 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-22 00:37:40,482 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-22 00:37:40,522 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-22 00:37:40,538 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 00:37:40,597 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:38:00,736 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12960#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96| Int)) (and (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 24) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 0)) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 1) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 2)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 4)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 16) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 8) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 3)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 8) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 16) 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 24)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 32))) (= |__VERIFIER_assert_#in~cond| 0) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:38:00,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:38:00,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:38:00,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 14] total 39 [2022-11-22 00:38:00,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934260937] [2022-11-22 00:38:00,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:38:00,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-22 00:38:00,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:38:00,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-22 00:38:00,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=3991, Unknown=7, NotChecked=0, Total=4422 [2022-11-22 00:38:00,740 INFO L87 Difference]: Start difference. First operand 363 states and 448 transitions. Second operand has 39 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 37 states have internal predecessors, (105), 20 states have call successors, (33), 4 states have call predecessors, (33), 8 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) [2022-11-22 00:38:21,041 WARN L233 SmtUtils]: Spent 20.06s on a formula simplification. DAG size of input: 45 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:38:31,197 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:38:41,318 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:38:51,410 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:39:11,568 WARN L233 SmtUtils]: Spent 20.10s on a formula simplification. DAG size of input: 50 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:39:21,852 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:39:24,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:39:28,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:39:30,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:39:50,826 WARN L233 SmtUtils]: Spent 20.08s on a formula simplification. DAG size of input: 54 DAG size of output: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:39:52,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:39:54,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:39:59,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:40:05,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:40:13,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:40:23,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:40:35,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:40:37,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:40:39,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:40:41,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:40:43,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:40:45,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:40:57,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:40:59,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:01,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:03,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:05,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:07,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:09,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:12,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:14,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:16,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:18,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:22,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:24,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:26,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:28,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:30,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:32,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:35,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:37,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:39,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:41,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:43,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:45,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:47,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:49,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:51,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:53,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:55,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:57,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:41:59,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:42:01,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 00:42:01,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:42:01,615 INFO L93 Difference]: Finished difference Result 571 states and 685 transitions. [2022-11-22 00:42:01,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-22 00:42:01,615 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 37 states have internal predecessors, (105), 20 states have call successors, (33), 4 states have call predecessors, (33), 8 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) Word has length 73 [2022-11-22 00:42:01,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:42:01,618 INFO L225 Difference]: With dead ends: 571 [2022-11-22 00:42:01,618 INFO L226 Difference]: Without dead ends: 336 [2022-11-22 00:42:01,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 168 SyntacticMatches, 11 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2825 ImplicationChecksByTransitivity, 191.7s TimeCoverageRelationStatistics Valid=934, Invalid=7779, Unknown=29, NotChecked=0, Total=8742 [2022-11-22 00:42:01,621 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 471 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 212 mSolverCounterUnsat, 46 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 94.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 46 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94.8s IncrementalHoareTripleChecker+Time [2022-11-22 00:42:01,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 935 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1805 Invalid, 46 Unknown, 0 Unchecked, 94.8s Time] [2022-11-22 00:42:01,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-22 00:42:01,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 228. [2022-11-22 00:42:01,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 155 states have (on average 1.135483870967742) internal successors, (176), 162 states have internal predecessors, (176), 41 states have call successors, (41), 26 states have call predecessors, (41), 31 states have return successors, (46), 39 states have call predecessors, (46), 38 states have call successors, (46) [2022-11-22 00:42:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 263 transitions. [2022-11-22 00:42:01,765 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 263 transitions. Word has length 73 [2022-11-22 00:42:01,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:42:01,766 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 263 transitions. [2022-11-22 00:42:01,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 37 states have internal predecessors, (105), 20 states have call successors, (33), 4 states have call predecessors, (33), 8 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) [2022-11-22 00:42:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 263 transitions. [2022-11-22 00:42:01,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-22 00:42:01,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:42:01,768 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:42:01,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 00:42:01,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 00:42:01,971 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:42:01,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:42:01,971 INFO L85 PathProgramCache]: Analyzing trace with hash -79775404, now seen corresponding path program 1 times [2022-11-22 00:42:01,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:42:01,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488895284] [2022-11-22 00:42:01,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:42:01,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:42:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:42:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-22 00:42:02,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:42:02,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488895284] [2022-11-22 00:42:02,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488895284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:42:02,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:42:02,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 00:42:02,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036213222] [2022-11-22 00:42:02,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:42:02,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:42:02,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:42:02,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:42:02,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:42:02,273 INFO L87 Difference]: Start difference. First operand 228 states and 263 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-22 00:42:02,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:42:02,527 INFO L93 Difference]: Finished difference Result 242 states and 276 transitions. [2022-11-22 00:42:02,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:42:02,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 76 [2022-11-22 00:42:02,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:42:02,529 INFO L225 Difference]: With dead ends: 242 [2022-11-22 00:42:02,529 INFO L226 Difference]: Without dead ends: 240 [2022-11-22 00:42:02,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:42:02,532 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:42:02,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 157 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:42:02,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-22 00:42:02,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-11-22 00:42:02,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 164 states have (on average 1.1280487804878048) internal successors, (185), 171 states have internal predecessors, (185), 41 states have call successors, (41), 29 states have call predecessors, (41), 34 states have return successors, (46), 39 states have call predecessors, (46), 38 states have call successors, (46) [2022-11-22 00:42:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 272 transitions. [2022-11-22 00:42:02,701 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 272 transitions. Word has length 76 [2022-11-22 00:42:02,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:42:02,701 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 272 transitions. [2022-11-22 00:42:02,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-22 00:42:02,702 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 272 transitions. [2022-11-22 00:42:02,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-22 00:42:02,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:42:02,703 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:42:02,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-22 00:42:02,703 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:42:02,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:42:02,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1977405740, now seen corresponding path program 1 times [2022-11-22 00:42:02,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:42:02,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504350131] [2022-11-22 00:42:02,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:42:02,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:42:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:42:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-22 00:42:03,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:42:03,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504350131] [2022-11-22 00:42:03,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504350131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:42:03,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17630722] [2022-11-22 00:42:03,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:42:03,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:42:03,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:42:03,622 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:42:03,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 00:42:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:42:04,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-22 00:42:04,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:42:24,754 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:42:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 74 proven. 20 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-22 00:42:24,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:42:25,597 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-22 00:42:25,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-22 00:42:25,607 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-22 00:42:25,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2022-11-22 00:42:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 61 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-22 00:42:25,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17630722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:42:25,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [634824596] [2022-11-22 00:42:25,640 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 00:42:25,640 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:42:25,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:42:25,641 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:42:25,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:42:25,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:25,707 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-22 00:42:25,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-22 00:42:25,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:25,771 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 00:42:25,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 00:42:25,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:25,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:25,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:25,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:25,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:25,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:42:25,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:25,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 00:42:26,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:42:26,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-22 00:42:26,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:42:26,140 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 00:42:26,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-22 00:42:26,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:42:26,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,283 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 00:42:26,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-22 00:42:26,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-22 00:42:26,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 00:42:26,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:42:26,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 00:42:26,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:42:26,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 00:42:26,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:42:26,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-22 00:42:26,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 00:42:26,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 00:42:26,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:42:26,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:42:26,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:42:26,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 00:42:26,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:42:26,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-22 00:42:26,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 00:42:26,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 00:42:26,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:42:26,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 00:42:26,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-22 00:42:26,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:42:26,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:42:29,128 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-22 00:42:29,148 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-22 00:42:29,821 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-22 00:42:29,823 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-22 00:42:29,840 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 00:42:29,898 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:42:38,800 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15402#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_185| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183| Int)) (and (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_185|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183| 24)) 0) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183| 0) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_185|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183| 24))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_185|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_185|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_185|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_185|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_185|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183| 24))) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183| 16)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_185|))) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:42:38,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:42:38,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:42:38,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 17, 14] total 31 [2022-11-22 00:42:38,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753135814] [2022-11-22 00:42:38,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:42:38,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-22 00:42:38,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:42:38,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-22 00:42:38,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=3054, Unknown=7, NotChecked=0, Total=3306 [2022-11-22 00:42:38,803 INFO L87 Difference]: Start difference. First operand 240 states and 272 transitions. Second operand has 31 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 14 states have call successors, (28), 4 states have call predecessors, (28), 8 states have return successors, (27), 12 states have call predecessors, (27), 14 states have call successors, (27) [2022-11-22 00:42:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:42:40,632 INFO L93 Difference]: Finished difference Result 433 states and 499 transitions. [2022-11-22 00:42:40,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 00:42:40,632 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 14 states have call successors, (28), 4 states have call predecessors, (28), 8 states have return successors, (27), 12 states have call predecessors, (27), 14 states have call successors, (27) Word has length 79 [2022-11-22 00:42:40,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:42:40,634 INFO L225 Difference]: With dead ends: 433 [2022-11-22 00:42:40,634 INFO L226 Difference]: Without dead ends: 269 [2022-11-22 00:42:40,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 180 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=364, Invalid=4051, Unknown=7, NotChecked=0, Total=4422 [2022-11-22 00:42:40,636 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 223 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:42:40,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 681 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 00:42:40,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-22 00:42:40,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 240. [2022-11-22 00:42:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 164 states have (on average 1.1219512195121952) internal successors, (184), 171 states have internal predecessors, (184), 41 states have call successors, (41), 29 states have call predecessors, (41), 34 states have return successors, (46), 39 states have call predecessors, (46), 38 states have call successors, (46) [2022-11-22 00:42:40,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 271 transitions. [2022-11-22 00:42:40,753 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 271 transitions. Word has length 79 [2022-11-22 00:42:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:42:40,753 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 271 transitions. [2022-11-22 00:42:40,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 14 states have call successors, (28), 4 states have call predecessors, (28), 8 states have return successors, (27), 12 states have call predecessors, (27), 14 states have call successors, (27) [2022-11-22 00:42:40,754 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 271 transitions. [2022-11-22 00:42:40,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-22 00:42:40,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:42:40,755 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:42:40,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 00:42:40,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 00:42:40,963 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:42:40,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:42:40,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1751529687, now seen corresponding path program 1 times [2022-11-22 00:42:40,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:42:40,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144233775] [2022-11-22 00:42:40,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:42:40,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:42:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:42:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-22 00:42:41,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:42:41,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144233775] [2022-11-22 00:42:41,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144233775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:42:41,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:42:41,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 00:42:41,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774192132] [2022-11-22 00:42:41,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:42:41,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:42:41,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:42:41,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:42:41,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:42:41,400 INFO L87 Difference]: Start difference. First operand 240 states and 271 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 00:42:41,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:42:41,703 INFO L93 Difference]: Finished difference Result 254 states and 284 transitions. [2022-11-22 00:42:41,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:42:41,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 82 [2022-11-22 00:42:41,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:42:41,705 INFO L225 Difference]: With dead ends: 254 [2022-11-22 00:42:41,705 INFO L226 Difference]: Without dead ends: 248 [2022-11-22 00:42:41,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-22 00:42:41,706 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:42:41,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 202 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:42:41,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-22 00:42:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2022-11-22 00:42:41,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 165 states have (on average 1.103030303030303) internal successors, (182), 170 states have internal predecessors, (182), 40 states have call successors, (40), 31 states have call predecessors, (40), 34 states have return successors, (45), 38 states have call predecessors, (45), 38 states have call successors, (45) [2022-11-22 00:42:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 267 transitions. [2022-11-22 00:42:41,847 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 267 transitions. Word has length 82 [2022-11-22 00:42:41,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:42:41,850 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 267 transitions. [2022-11-22 00:42:41,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-22 00:42:41,851 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 267 transitions. [2022-11-22 00:42:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-22 00:42:41,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:42:41,852 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:42:41,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-22 00:42:41,852 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:42:41,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:42:41,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1211099987, now seen corresponding path program 1 times [2022-11-22 00:42:41,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:42:41,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613295206] [2022-11-22 00:42:41,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:42:41,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:42:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:42:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-22 00:42:42,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:42:42,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613295206] [2022-11-22 00:42:42,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613295206] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:42:42,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239727636] [2022-11-22 00:42:42,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:42:42,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:42:42,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:42:42,124 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:42:42,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 00:42:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:42:42,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 00:42:42,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:42:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-22 00:42:42,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:42:42,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239727636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:42:42,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:42:42,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-22 00:42:42,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883192420] [2022-11-22 00:42:42,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:42:42,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:42:42,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:42:42,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:42:42,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:42:42,563 INFO L87 Difference]: Start difference. First operand 240 states and 267 transitions. Second operand has 6 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 00:42:42,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:42:42,800 INFO L93 Difference]: Finished difference Result 405 states and 454 transitions. [2022-11-22 00:42:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:42:42,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 83 [2022-11-22 00:42:42,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:42:42,802 INFO L225 Difference]: With dead ends: 405 [2022-11-22 00:42:42,803 INFO L226 Difference]: Without dead ends: 249 [2022-11-22 00:42:42,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:42:42,804 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:42:42,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 204 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:42:42,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-22 00:42:42,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 240. [2022-11-22 00:42:42,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 165 states have (on average 1.103030303030303) internal successors, (182), 170 states have internal predecessors, (182), 40 states have call successors, (40), 31 states have call predecessors, (40), 34 states have return successors, (45), 38 states have call predecessors, (45), 38 states have call successors, (45) [2022-11-22 00:42:42,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 267 transitions. [2022-11-22 00:42:42,938 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 267 transitions. Word has length 83 [2022-11-22 00:42:42,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:42:42,939 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 267 transitions. [2022-11-22 00:42:42,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 00:42:42,939 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 267 transitions. [2022-11-22 00:42:42,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-22 00:42:42,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:42:42,940 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:42:42,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 00:42:43,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 00:42:43,143 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:42:43,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:42:43,143 INFO L85 PathProgramCache]: Analyzing trace with hash -171176915, now seen corresponding path program 2 times [2022-11-22 00:42:43,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:42:43,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691701000] [2022-11-22 00:42:43,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:42:43,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:42:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:42:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 80 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-22 00:42:44,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:42:44,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691701000] [2022-11-22 00:42:44,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691701000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:42:44,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367501243] [2022-11-22 00:42:44,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:42:44,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:42:44,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:42:44,275 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:42:44,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 00:42:44,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 00:42:44,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:42:44,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-22 00:42:44,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:42:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 00:42:44,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:42:44,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367501243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:42:44,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:42:44,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [16] total 21 [2022-11-22 00:42:44,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120198417] [2022-11-22 00:42:44,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:42:44,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:42:44,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:42:44,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:42:44,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-11-22 00:42:44,864 INFO L87 Difference]: Start difference. First operand 240 states and 267 transitions. Second operand has 7 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-22 00:42:45,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:42:45,204 INFO L93 Difference]: Finished difference Result 404 states and 453 transitions. [2022-11-22 00:42:45,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:42:45,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 85 [2022-11-22 00:42:45,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:42:45,206 INFO L225 Difference]: With dead ends: 404 [2022-11-22 00:42:45,207 INFO L226 Difference]: Without dead ends: 248 [2022-11-22 00:42:45,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2022-11-22 00:42:45,208 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:42:45,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 239 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:42:45,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-22 00:42:45,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 241. [2022-11-22 00:42:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 166 states have (on average 1.1024096385542168) internal successors, (183), 171 states have internal predecessors, (183), 40 states have call successors, (40), 31 states have call predecessors, (40), 34 states have return successors, (45), 38 states have call predecessors, (45), 38 states have call successors, (45) [2022-11-22 00:42:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 268 transitions. [2022-11-22 00:42:45,394 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 268 transitions. Word has length 85 [2022-11-22 00:42:45,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:42:45,395 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 268 transitions. [2022-11-22 00:42:45,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-22 00:42:45,395 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 268 transitions. [2022-11-22 00:42:45,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-22 00:42:45,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:42:45,396 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:42:45,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 00:42:45,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:42:45,605 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:42:45,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:42:45,605 INFO L85 PathProgramCache]: Analyzing trace with hash -400229854, now seen corresponding path program 2 times [2022-11-22 00:42:45,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:42:45,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363031687] [2022-11-22 00:42:45,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:42:45,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:42:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:42:50,617 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 30 proven. 68 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-22 00:42:50,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:42:50,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363031687] [2022-11-22 00:42:50,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363031687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:42:50,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739871646] [2022-11-22 00:42:50,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:42:50,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:42:50,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:42:50,623 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:42:50,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_522b41cd-a73e-4a9c-ba99-e03da42430af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 00:42:51,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 00:42:51,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:42:51,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 146 conjunts are in the unsatisfiable core [2022-11-22 00:42:51,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:42:51,186 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 7 treesize of output 3 [2022-11-22 00:42:51,209 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-22 00:42:51,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-11-22 00:42:51,487 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-22 00:42:51,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-22 00:42:51,535 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-22 00:42:51,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-22 00:42:51,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 00:42:51,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 00:42:51,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 00:42:51,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-22 00:42:51,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 19 [2022-11-22 00:42:51,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 00:42:51,755 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-22 00:42:51,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 101 [2022-11-22 00:42:51,763 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 94 treesize of output 66 [2022-11-22 00:42:51,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 00:43:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 94 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 00:43:24,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:44:13,256 WARN L233 SmtUtils]: Spent 22.98s on a formula simplification. DAG size of input: 65 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 00:44:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 64 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-22 00:44:16,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739871646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:44:16,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1683886187] [2022-11-22 00:44:16,188 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-22 00:44:16,188 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:44:16,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:44:16,188 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:44:16,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:44:16,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,308 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 00:44:16,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-22 00:44:16,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-22 00:44:16,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-22 00:44:16,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-22 00:44:16,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:44:16,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-22 00:44:16,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,855 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 00:44:16,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-22 00:44:16,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:44:16,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 00:44:16,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:44:16,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:16,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-22 00:44:17,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:17,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:17,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-22 00:44:17,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:17,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:17,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-22 00:44:17,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:44:17,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:44:17,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:17,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:44:17,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:17,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:44:17,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:17,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:17,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:17,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:44:17,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:44:17,930 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-22 00:44:17,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-11-22 00:44:18,510 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-11-22 00:44:18,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 650 treesize of output 680 [2022-11-22 00:44:18,803 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-11-22 00:44:18,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 643 treesize of output 654 [2022-11-22 00:44:18,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:44:18,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:18,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:44:18,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:18,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:44:18,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:18,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:18,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:18,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:44:18,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:44:19,333 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-22 00:44:19,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 14 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 676 treesize of output 685 [2022-11-22 00:44:19,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:44:19,444 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-22 00:44:19,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 682 treesize of output 635 [2022-11-22 00:44:19,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 656 treesize of output 635 [2022-11-22 00:44:52,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:52,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 00:44:53,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:44:53,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:53,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 00:44:53,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:53,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-22 00:44:53,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:53,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 00:44:53,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:53,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-22 00:44:53,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:44:53,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:44:53,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:53,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:53,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-22 00:44:53,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:53,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:44:53,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:53,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 00:44:53,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:44:53,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-22 00:44:54,942 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 54 for LOIs [2022-11-22 00:44:55,000 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2022-11-22 00:44:55,750 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 134 for LOIs [2022-11-22 00:44:55,795 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-22 00:44:55,813 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-22 00:44:55,878 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:45:21,308 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20097#(and (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_209| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_207| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_209|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_207| 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_207|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_209|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_207| 24))) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_209|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_207| 24)) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_209|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_207| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_209|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_207| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_209|) (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_207| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_209|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_207| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_209|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_207| 24)))))) (<= |~#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|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-11-22 00:45:21,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:45:21,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:45:21,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 31, 18] total 66 [2022-11-22 00:45:21,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302995036] [2022-11-22 00:45:21,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:45:21,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-22 00:45:21,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:45:21,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-22 00:45:21,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=8221, Unknown=30, NotChecked=0, Total=8742 [2022-11-22 00:45:21,312 INFO L87 Difference]: Start difference. First operand 241 states and 268 transitions. Second operand has 66 states, 56 states have (on average 2.3214285714285716) internal successors, (130), 56 states have internal predecessors, (130), 26 states have call successors, (36), 7 states have call predecessors, (36), 17 states have return successors, (35), 24 states have call predecessors, (35), 25 states have call successors, (35) [2022-11-22 00:45:37,132 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse15 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|))) (let ((.cse14 (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)) (.cse16 (+ 8 .cse15))) (let ((.cse13 (= (select (select |c_#memory_$Pointer$.base| .cse14) .cse16) |c_aws_linked_list_node_next_is_valid_#in~node.base|)) (.cse12 (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| (select (select |c_#memory_$Pointer$.offset| .cse14) .cse16)))) (let ((.cse0 (not .cse12)) (.cse2 (not .cse13)) (.cse7 (= .cse15 0)) (.cse3 (= .cse14 0)) (.cse5 (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| 0)) (.cse1 (= 0 |c_aws_linked_list_node_next_is_valid_#in~node.base|)) (.cse6 (mod |c_aws_linked_list_node_next_is_valid_#res| 256))) (and (or .cse0 .cse1 (and (<= 1 |c_aws_linked_list_node_next_is_valid_#res|) (<= |c_aws_linked_list_node_next_is_valid_#res| 1)) .cse2 .cse3) (or (exists ((|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_236| Int)) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_236|) 24))) (and (not (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_236| 2)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_236| 4)) (exists ((v_DerPreprocessor_78 (Array Int Int)) (v_DerPreprocessor_79 (Array Int Int))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_78) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_236| v_DerPreprocessor_79) .cse4 v_DerPreprocessor_78) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_236| v_DerPreprocessor_79) .cse4) (select |c_#memory_$Pointer$.base| .cse4)) (= .cse4 (select v_DerPreprocessor_79 24)))) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_236|) (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_236|) 24) 0) (not (= .cse4 0)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_236| 3))))) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_236| Int)) (and (not (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_236| 2)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_236| 4)) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_236|) 24) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_236|) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_236|) (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_236|) 24) 0) (not (= |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_236| 3))))) (or .cse0 (and .cse1 .cse5) (not (<= .cse6 0)) (and .cse7 .cse3) .cse2) (or (and (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_85| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78| Int)) (or (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_85|) 0)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_85|) 0)))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_85| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78| Int)) (let ((.cse8 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_85|))) (= (let ((.cse9 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_85|))) (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| .cse8) .cse9)) (+ (select (select |c_#memory_$Pointer$.offset| .cse8) .cse9) 8))) .cse8))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_85| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78| Int)) (let ((.cse10 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_85|))) (= .cse10 (let ((.cse11 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_78|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_85|))) (select (select |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| .cse11) .cse10)) (+ (select (select |c_#memory_$Pointer$.offset| .cse11) .cse10) 8))))))) (and .cse12 (or (not .cse7) (not .cse3)) .cse13 (or (not .cse5) (not .cse1))) (= .cse6 0))))))) is different from false