./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:27:14,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:27:14,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:27:14,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:27:14,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:27:14,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:27:14,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:27:14,302 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:27:14,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:27:14,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:27:14,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:27:14,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:27:14,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:27:14,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:27:14,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:27:14,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:27:14,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:27:14,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:27:14,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:27:14,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:27:14,323 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:27:14,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:27:14,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:27:14,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:27:14,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:27:14,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:27:14,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:27:14,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:27:14,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:27:14,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:27:14,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:27:14,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:27:14,348 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:27:14,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:27:14,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:27:14,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:27:14,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:27:14,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:27:14,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:27:14,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:27:14,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:27:14,357 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:27:14,406 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:27:14,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:27:14,407 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:27:14,407 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:27:14,408 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:27:14,409 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:27:14,409 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:27:14,409 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:27:14,409 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:27:14,410 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:27:14,411 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:27:14,411 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:27:14,412 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:27:14,412 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:27:14,412 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:27:14,413 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:27:14,413 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:27:14,413 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:27:14,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:27:14,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:27:14,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:27:14,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:27:14,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:27:14,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:27:14,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:27:14,416 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:27:14,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:27:14,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:27:14,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:27:14,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:27:14,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:27:14,418 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:27:14,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:27:14,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:27:14,419 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:27:14,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:27:14,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:27:14,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:27:14,422 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_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 [2022-11-03 03:27:14,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:27:14,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:27:14,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:27:14,761 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:27:14,763 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:27:14,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2022-11-03 03:27:14,840 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/data/2c7ede805/520550717cbb4213940810aabb223524/FLAG461fd4db5 [2022-11-03 03:27:15,675 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:27:15,676 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2022-11-03 03:27:15,728 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/data/2c7ede805/520550717cbb4213940810aabb223524/FLAG461fd4db5 [2022-11-03 03:27:16,194 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/data/2c7ede805/520550717cbb4213940810aabb223524 [2022-11-03 03:27:16,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:27:16,201 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:27:16,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:27:16,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:27:16,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:27:16,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:27:16" (1/1) ... [2022-11-03 03:27:16,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aa5f30f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:16, skipping insertion in model container [2022-11-03 03:27:16,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:27:16" (1/1) ... [2022-11-03 03:27:16,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:27:16,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:27:16,572 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2022-11-03 03:27:16,578 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2022-11-03 03:27:17,468 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:17,469 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:17,469 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:17,470 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:17,471 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:17,505 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:17,508 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:17,510 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:17,511 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:17,513 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:17,514 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:17,514 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:17,515 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:17,896 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 03:27:17,899 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 03:27:17,903 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 03:27:17,905 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 03:27:17,907 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 03:27:17,908 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 03:27:17,909 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 03:27:17,910 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 03:27:17,912 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 03:27:17,913 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 03:27:18,116 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 03:27:18,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:27:18,155 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:27:18,172 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2022-11-03 03:27:18,173 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2022-11-03 03:27:18,220 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:18,221 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:18,221 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:18,222 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:18,223 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:18,234 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:18,235 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:18,236 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:18,238 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:18,240 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:18,240 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:18,242 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:18,243 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-03 03:27:18,325 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-03 03:27:18,328 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-03 03:27:18,329 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-03 03:27:18,331 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-03 03:27:18,337 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-03 03:27:18,338 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-03 03:27:18,339 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-03 03:27:18,340 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-03 03:27:18,341 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-03 03:27:18,342 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-03 03:27:18,376 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-03 03:27:18,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:27:18,694 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:27:18,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:18 WrapperNode [2022-11-03 03:27:18,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:27:18,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:27:18,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:27:18,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:27:18,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:18" (1/1) ... [2022-11-03 03:27:18,799 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:18" (1/1) ... [2022-11-03 03:27:18,850 INFO L138 Inliner]: procedures = 679, calls = 1032, calls flagged for inlining = 48, calls inlined = 3, statements flattened = 29 [2022-11-03 03:27:18,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:27:18,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:27:18,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:27:18,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:27:18,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:18" (1/1) ... [2022-11-03 03:27:18,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:18" (1/1) ... [2022-11-03 03:27:18,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:18" (1/1) ... [2022-11-03 03:27:18,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:18" (1/1) ... [2022-11-03 03:27:18,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:18" (1/1) ... [2022-11-03 03:27:18,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:18" (1/1) ... [2022-11-03 03:27:18,919 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:18" (1/1) ... [2022-11-03 03:27:18,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:18" (1/1) ... [2022-11-03 03:27:18,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:27:18,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:27:18,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:27:18,936 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:27:18,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:18" (1/1) ... [2022-11-03 03:27:18,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:27:18,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:27:18,977 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:27:19,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:27:19,047 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2022-11-03 03:27:19,048 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2022-11-03 03:27:19,048 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-11-03 03:27:19,049 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-11-03 03:27:19,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:27:19,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:27:19,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 03:27:19,050 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 03:27:19,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:27:19,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:27:19,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:27:19,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 03:27:19,050 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 03:27:19,051 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:27:19,051 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:27:19,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:27:19,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 03:27:19,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:27:19,353 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:27:19,356 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:27:19,480 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:27:19,550 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:27:19,559 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 03:27:19,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:27:19 BoogieIcfgContainer [2022-11-03 03:27:19,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:27:19,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:27:19,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:27:19,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:27:19,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:27:16" (1/3) ... [2022-11-03 03:27:19,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af6ed3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:27:19, skipping insertion in model container [2022-11-03 03:27:19,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:27:18" (2/3) ... [2022-11-03 03:27:19,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af6ed3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:27:19, skipping insertion in model container [2022-11-03 03:27:19,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:27:19" (3/3) ... [2022-11-03 03:27:19,584 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness.i [2022-11-03 03:27:19,611 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:27:19,612 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:27:19,664 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:27:19,671 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;@5fff5ba0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:27:19,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:27:19,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 03:27:19,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 03:27:19,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:19,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:19,685 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:19,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:19,690 INFO L85 PathProgramCache]: Analyzing trace with hash 325938203, now seen corresponding path program 1 times [2022-11-03 03:27:19,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:19,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651555995] [2022-11-03 03:27:19,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:19,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:20,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:20,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651555995] [2022-11-03 03:27:20,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651555995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:20,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:20,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:27:20,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41892048] [2022-11-03 03:27:20,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:20,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:27:20,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:20,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:27:20,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:27:20,153 INFO L87 Difference]: Start difference. First operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:27:20,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:20,217 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2022-11-03 03:27:20,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:27:20,220 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-11-03 03:27:20,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:20,229 INFO L225 Difference]: With dead ends: 56 [2022-11-03 03:27:20,235 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 03:27:20,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:27:20,247 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:20,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:27:20,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 03:27:20,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-03 03:27:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 03:27:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-11-03 03:27:20,296 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2022-11-03 03:27:20,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:20,297 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-11-03 03:27:20,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 03:27:20,297 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-11-03 03:27:20,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 03:27:20,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:20,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:20,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:27:20,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:20,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:20,305 INFO L85 PathProgramCache]: Analyzing trace with hash -805366998, now seen corresponding path program 1 times [2022-11-03 03:27:20,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:20,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555211166] [2022-11-03 03:27:20,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:20,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:20,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:20,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555211166] [2022-11-03 03:27:20,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555211166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:20,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:20,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:27:20,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887511869] [2022-11-03 03:27:20,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:20,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:27:20,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:20,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:27:20,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:27:20,606 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 03:27:20,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:20,680 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-11-03 03:27:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:27:20,681 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2022-11-03 03:27:20,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:20,684 INFO L225 Difference]: With dead ends: 39 [2022-11-03 03:27:20,684 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 03:27:20,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:27:20,685 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:20,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 117 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:27:20,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 03:27:20,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-11-03 03:27:20,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-03 03:27:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-03 03:27:20,695 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2022-11-03 03:27:20,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:20,696 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-03 03:27:20,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 03:27:20,696 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-03 03:27:20,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 03:27:20,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:20,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:20,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:27:20,698 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:20,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:20,699 INFO L85 PathProgramCache]: Analyzing trace with hash 989415369, now seen corresponding path program 1 times [2022-11-03 03:27:20,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:20,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739119673] [2022-11-03 03:27:20,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:20,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:20,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:20,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739119673] [2022-11-03 03:27:20,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739119673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:27:20,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:27:20,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:27:20,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281038635] [2022-11-03 03:27:20,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:27:20,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:27:20,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:20,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:27:20,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:27:20,997 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 03:27:21,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:21,057 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2022-11-03 03:27:21,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:27:21,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-11-03 03:27:21,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:21,061 INFO L225 Difference]: With dead ends: 64 [2022-11-03 03:27:21,062 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 03:27:21,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:27:21,066 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:21,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 76 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:27:21,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 03:27:21,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-03 03:27:21,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-03 03:27:21,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-03 03:27:21,073 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2022-11-03 03:27:21,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:21,074 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-03 03:27:21,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 03:27:21,074 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-03 03:27:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 03:27:21,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:21,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:21,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:27:21,075 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:21,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:21,085 INFO L85 PathProgramCache]: Analyzing trace with hash -518460441, now seen corresponding path program 1 times [2022-11-03 03:27:21,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:21,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286170931] [2022-11-03 03:27:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:21,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:21,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:21,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286170931] [2022-11-03 03:27:21,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286170931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:27:21,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740205611] [2022-11-03 03:27:21,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:21,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:27:21,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:27:21,457 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:27:21,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:27:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:21,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-03 03:27:21,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:21,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:27:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:21,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:27:22,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-03 03:27:22,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-03 03:27:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:22,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740205611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:27:22,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1077502944] [2022-11-03 03:27:22,429 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 03:27:22,430 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:27:22,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:27:22,438 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:27:22,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:27:22,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:22,562 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 03:27:22,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 03:27:22,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:22,675 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:27:22,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:27:22,734 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2022-11-03 03:27:23,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:23,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:27:23,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:23,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:23,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:23,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-03 03:27:23,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-03 03:27:23,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2022-11-03 03:27:23,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:23,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:23,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:27:23,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:23,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:23,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:23,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:23,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:23,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:23,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:23,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:23,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:23,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:23,774 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 82 for LOIs [2022-11-03 03:27:23,843 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2022-11-03 03:27:23,875 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 78 for LOIs [2022-11-03 03:27:23,926 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 133 for LOIs [2022-11-03 03:27:24,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:24,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:24,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:24,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:27:24,683 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:27:29,870 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '575#(and (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= ~tl_last_error~0 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (exists ((|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| Int)) (and (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 2)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 5)) (not (= (mod (ite (= (ite (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 0)) 1 0) 0) 0 1) 256) 0)) (= 16 (select |#length| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 4)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 0)) (not (= (mod (select (select |#memory_int| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) 0) 256) 0)) (= (select |#valid| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) 1) (<= 0 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) (< |#StackHeapBarrier| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 3)))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:27:29,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:27:29,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:27:29,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 8] total 17 [2022-11-03 03:27:29,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28479129] [2022-11-03 03:27:29,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:27:29,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 03:27:29,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:29,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 03:27:29,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 03:27:29,873 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:27:30,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:30,103 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2022-11-03 03:27:30,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:27:30,104 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 23 [2022-11-03 03:27:30,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:30,105 INFO L225 Difference]: With dead ends: 74 [2022-11-03 03:27:30,105 INFO L226 Difference]: Without dead ends: 45 [2022-11-03 03:27:30,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2022-11-03 03:27:30,107 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:30,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 215 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-11-03 03:27:30,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-03 03:27:30,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-03 03:27:30,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.25) internal successors, (35), 30 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-03 03:27:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-11-03 03:27:30,117 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 23 [2022-11-03 03:27:30,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:30,117 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-11-03 03:27:30,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:27:30,126 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-11-03 03:27:30,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 03:27:30,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:30,127 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:30,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:30,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:27:30,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:30,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:30,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1249058711, now seen corresponding path program 1 times [2022-11-03 03:27:30,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:30,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607128526] [2022-11-03 03:27:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:30,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:27:30,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:30,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607128526] [2022-11-03 03:27:30,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607128526] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:27:30,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130142464] [2022-11-03 03:27:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:30,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:27:30,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:27:30,620 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:27:30,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:27:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:30,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 03:27:30,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:30,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:30,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 03:27:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:31,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:27:32,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 44 treesize of output 40 [2022-11-03 03:27:32,576 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:27:32,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 108 [2022-11-03 03:27:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:32,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130142464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:27:32,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2073730785] [2022-11-03 03:27:32,643 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 03:27:32,643 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:27:32,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:27:32,644 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:27:32,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:27:32,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:32,736 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 03:27:32,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 03:27:32,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:32,832 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:27:32,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:27:32,868 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2022-11-03 03:27:33,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:27:33,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:27:33,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:27:33,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:27:33,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:33,153 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:27:33,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 54 [2022-11-03 03:27:33,183 INFO L356 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-03 03:27:33,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-03 03:27:33,212 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:27:33,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 46 [2022-11-03 03:27:33,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:33,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:33,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:27:33,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:33,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:33,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:33,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:33,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:33,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:33,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:33,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:33,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:33,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:33,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:33,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:33,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:33,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:33,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:33,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:33,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:33,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:33,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:33,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:33,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:33,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 545 treesize of output 489 [2022-11-03 03:27:33,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 489 treesize of output 433 [2022-11-03 03:27:33,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 433 treesize of output 417 [2022-11-03 03:27:34,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:34,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:34,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:34,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:34,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:34,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:34,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:34,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:34,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:34,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:34,287 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs [2022-11-03 03:27:34,514 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2022-11-03 03:27:34,538 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 78 for LOIs [2022-11-03 03:27:34,702 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 135 for LOIs [2022-11-03 03:27:35,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:35,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:35,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:35,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:27:35,198 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:27:44,743 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '943#(and (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 5 |~#s_can_fail_allocator_static~0.base|) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_4 Int) (aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4_67 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_4 Int)) (and (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_4) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_4 (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4_67 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4_67 18446744073709551616) (+ (- 18446744073709551616) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4_67 18446744073709551616))))) 256) 0)) (<= aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4_67 18446744073709551614) (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4_67))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (<= 0 ~tl_last_error~0) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (<= 0 |#NULL.offset|) (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 Int)) (and (= (select |#length| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) 16) (not (= 5 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23)) (<= 0 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 0)) (not (= (mod (ite (= 0 (ite (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 0)) 1 0)) 0 1) 256) 0)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 4)) (= (select |#valid| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) 1) (< |#StackHeapBarrier| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 3)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 2)))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:27:44,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:27:44,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:27:44,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 11] total 27 [2022-11-03 03:27:44,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566168800] [2022-11-03 03:27:44,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:27:44,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 03:27:44,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:27:44,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 03:27:44,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1837, Unknown=1, NotChecked=0, Total=1980 [2022-11-03 03:27:44,746 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 27 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 03:27:45,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:27:45,443 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2022-11-03 03:27:45,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-03 03:27:45,444 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 26 [2022-11-03 03:27:45,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:27:45,446 INFO L225 Difference]: With dead ends: 88 [2022-11-03 03:27:45,446 INFO L226 Difference]: Without dead ends: 52 [2022-11-03 03:27:45,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=173, Invalid=2178, Unknown=1, NotChecked=0, Total=2352 [2022-11-03 03:27:45,448 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:27:45,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 302 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 290 Invalid, 0 Unknown, 92 Unchecked, 0.5s Time] [2022-11-03 03:27:45,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-03 03:27:45,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-11-03 03:27:45,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-03 03:27:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2022-11-03 03:27:45,460 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 26 [2022-11-03 03:27:45,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:27:45,460 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2022-11-03 03:27:45,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.75) internal successors, (42), 25 states have internal predecessors, (42), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 03:27:45,461 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2022-11-03 03:27:45,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 03:27:45,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:27:45,462 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:27:45,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:27:45,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:27:45,676 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:27:45,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:27:45,677 INFO L85 PathProgramCache]: Analyzing trace with hash -842842685, now seen corresponding path program 2 times [2022-11-03 03:27:45,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:27:45,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476716819] [2022-11-03 03:27:45,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:27:45,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:27:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:27:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:27:45,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:27:45,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476716819] [2022-11-03 03:27:45,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476716819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:27:45,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818487167] [2022-11-03 03:27:45,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:27:45,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:27:45,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:27:45,998 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:27:46,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:27:46,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:27:46,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:27:46,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:27:46,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:27:46,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:27:46,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-03 03:27:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:46,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:27:47,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-03 03:27:47,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2022-11-03 03:27:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:27:47,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818487167] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:27:47,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694510666] [2022-11-03 03:27:47,867 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 03:27:47,867 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:27:47,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:27:47,868 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:27:47,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:27:47,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:47,949 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:27:47,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:27:47,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:47,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 03:27:47,999 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2022-11-03 03:27:48,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:48,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:27:48,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:48,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:48,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:48,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-03 03:27:48,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-03 03:27:48,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2022-11-03 03:27:48,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:48,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:27:48,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:48,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:48,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:48,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:48,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:48,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:48,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:48,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:48,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:48,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:48,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:48,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:48,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:48,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:48,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:48,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:48,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:48,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:48,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:48,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:48,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:48,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:48,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 545 treesize of output 489 [2022-11-03 03:27:48,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 489 treesize of output 473 [2022-11-03 03:27:48,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 473 treesize of output 417 [2022-11-03 03:27:49,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:49,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:49,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:49,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:49,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:49,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:49,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:49,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:49,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:27:49,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:27:49,228 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs [2022-11-03 03:27:49,433 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2022-11-03 03:27:49,457 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 76 for LOIs [2022-11-03 03:27:49,602 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 135 for LOIs [2022-11-03 03:27:50,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:27:50,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:50,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:50,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:27:50,078 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:28:04,434 WARN L234 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 191 DAG size of output: 135 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:28:05,185 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1363#(and (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36 Int)) (and (< |#StackHeapBarrier| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36 3)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36 0)) (<= 0 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36 2)) (not (= 0 (mod (ite (= (ite (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36 0)) 1 0) 0) 0 1) 256))) (= (select |#length| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36) 16) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36 4)) (= (select |#valid| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36) 1) (not (= 5 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36)))) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_6 Int) (aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6_67 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_6 Int)) (and (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6_67) (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_6) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_6 (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6_67 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6_67 18446744073709551616) (+ (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6_67 18446744073709551616) (- 18446744073709551616))))) 256) 0)) (<= aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6_67 18446744073709551614))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= ~tl_last_error~0 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:28:05,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:28:05,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:28:05,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 12] total 27 [2022-11-03 03:28:05,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652226053] [2022-11-03 03:28:05,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:28:05,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 03:28:05,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:05,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 03:28:05,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1760, Unknown=3, NotChecked=0, Total=1892 [2022-11-03 03:28:05,196 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 27 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:28:05,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:05,778 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2022-11-03 03:28:05,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 03:28:05,779 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 29 [2022-11-03 03:28:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:05,781 INFO L225 Difference]: With dead ends: 97 [2022-11-03 03:28:05,781 INFO L226 Difference]: Without dead ends: 57 [2022-11-03 03:28:05,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=150, Invalid=2009, Unknown=3, NotChecked=0, Total=2162 [2022-11-03 03:28:05,783 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:05,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 229 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 156 Invalid, 0 Unknown, 29 Unchecked, 0.3s Time] [2022-11-03 03:28:05,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-03 03:28:05,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2022-11-03 03:28:05,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 40 states have internal predecessors, (51), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-03 03:28:05,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2022-11-03 03:28:05,797 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 29 [2022-11-03 03:28:05,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:05,798 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2022-11-03 03:28:05,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:28:05,799 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2022-11-03 03:28:05,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 03:28:05,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:05,800 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:05,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:06,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 03:28:06,016 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:06,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:06,017 INFO L85 PathProgramCache]: Analyzing trace with hash 864618739, now seen corresponding path program 3 times [2022-11-03 03:28:06,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:06,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825359416] [2022-11-03 03:28:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:06,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:28:06,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:06,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825359416] [2022-11-03 03:28:06,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825359416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:28:06,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357628923] [2022-11-03 03:28:06,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:28:06,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:06,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:06,480 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:28:06,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:28:06,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:28:06,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:28:06,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 03:28:06,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:06,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:28:06,723 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-03 03:28:06,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 03:28:06,756 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:28:06,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 32 treesize of output 34 [2022-11-03 03:28:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:07,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:28:09,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 58 treesize of output 54 [2022-11-03 03:28:09,335 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:28:09,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 236 treesize of output 228 [2022-11-03 03:28:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:09,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357628923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:28:09,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [969325990] [2022-11-03 03:28:09,526 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 03:28:09,527 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:28:09,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:28:09,527 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:28:09,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:28:09,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:09,619 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:28:09,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:28:09,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:09,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 03:28:09,663 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2022-11-03 03:28:09,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:09,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:09,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:09,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:28:09,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-03 03:28:09,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-03 03:28:09,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2022-11-03 03:28:09,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:09,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:09,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:09,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:28:09,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:10,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:28:10,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:28:10,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:28:10,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:28:10,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 545 treesize of output 489 [2022-11-03 03:28:10,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 489 treesize of output 433 [2022-11-03 03:28:10,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 433 treesize of output 417 [2022-11-03 03:28:10,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:28:10,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:10,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:28:10,777 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs [2022-11-03 03:28:10,973 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2022-11-03 03:28:10,998 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 76 for LOIs [2022-11-03 03:28:11,202 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 135 for LOIs [2022-11-03 03:28:11,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:11,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:11,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:11,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:28:11,704 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:28:22,675 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1826#(and (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_8 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_8 Int) (aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8_67 Int)) (and (<= aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8_67 18446744073709551614) (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8_67) (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_8) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_8 (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8_67 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8_67 18446744073709551616) (+ (- 18446744073709551616) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8_67 18446744073709551616))))) 256) 0)))) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49 Int)) (and (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49 2)) (<= 0 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49) (< |#StackHeapBarrier| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49) (not (= 5 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49 3)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49 4)) (not (= (mod (ite (= (ite (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49 0)) 1 0) 0) 0 1) 256) 0)) (= (select |#valid| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49) 1) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49 0)) (= 16 (select |#length| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49)))) (= (select |#valid| 0) 0) (= ~tl_last_error~0 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:28:22,675 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:28:22,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:28:22,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16, 15] total 34 [2022-11-03 03:28:22,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233669673] [2022-11-03 03:28:22,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:28:22,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-03 03:28:22,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:22,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-03 03:28:22,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2382, Unknown=3, NotChecked=0, Total=2550 [2022-11-03 03:28:22,679 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 34 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:28:23,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:23,487 INFO L93 Difference]: Finished difference Result 106 states and 138 transitions. [2022-11-03 03:28:23,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 03:28:23,488 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 32 [2022-11-03 03:28:23,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:23,489 INFO L225 Difference]: With dead ends: 106 [2022-11-03 03:28:23,490 INFO L226 Difference]: Without dead ends: 62 [2022-11-03 03:28:23,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=184, Invalid=2569, Unknown=3, NotChecked=0, Total=2756 [2022-11-03 03:28:23,492 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:23,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 293 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 238 Invalid, 0 Unknown, 40 Unchecked, 0.6s Time] [2022-11-03 03:28:23,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-03 03:28:23,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-11-03 03:28:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.372093023255814) internal successors, (59), 45 states have internal predecessors, (59), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-03 03:28:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2022-11-03 03:28:23,512 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 32 [2022-11-03 03:28:23,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:23,512 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2022-11-03 03:28:23,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:28:23,513 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2022-11-03 03:28:23,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-03 03:28:23,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:23,514 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:23,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 03:28:23,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:23,728 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:23,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:23,728 INFO L85 PathProgramCache]: Analyzing trace with hash 408490399, now seen corresponding path program 4 times [2022-11-03 03:28:23,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:23,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608700718] [2022-11-03 03:28:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:23,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 03:28:24,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:24,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608700718] [2022-11-03 03:28:24,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608700718] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:28:24,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474565500] [2022-11-03 03:28:24,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:28:24,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:24,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:24,246 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:28:24,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:28:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:24,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 03:28:24,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:24,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:28:24,586 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:28:24,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-11-03 03:28:24,634 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:28:24,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 34 [2022-11-03 03:28:24,687 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-03 03:28:24,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 47 [2022-11-03 03:28:24,749 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:28:24,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 48 treesize of output 56 [2022-11-03 03:28:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:25,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:28:28,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 80 treesize of output 76 [2022-11-03 03:28:28,272 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:28:28,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1086 treesize of output 1080 [2022-11-03 03:28:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:28,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474565500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:28:28,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1660984442] [2022-11-03 03:28:28,517 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 03:28:28,518 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:28:28,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:28:28,518 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:28:28,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:28:28,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:28,605 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:28:28,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:28:28,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:28,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 03:28:28,662 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2022-11-03 03:28:28,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:28:28,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:28:28,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:28:28,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:28:28,844 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:28:28,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 54 [2022-11-03 03:28:28,869 INFO L356 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-03 03:28:28,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-03 03:28:28,893 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:28:28,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 46 [2022-11-03 03:28:28,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:28,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:28,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:28,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:28,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:28:29,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:28:29,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:28:29,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:28:29,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:28:29,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 545 treesize of output 489 [2022-11-03 03:28:29,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 489 treesize of output 433 [2022-11-03 03:28:29,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 433 treesize of output 417 [2022-11-03 03:28:29,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:28:29,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:29,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:28:29,712 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs [2022-11-03 03:28:29,898 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2022-11-03 03:28:29,921 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 78 for LOIs [2022-11-03 03:28:30,045 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 135 for LOIs [2022-11-03 03:28:30,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:30,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:30,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:28:30,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:30,459 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:28:44,692 WARN L234 SmtUtils]: Spent 8.83s on a formula simplification. DAG size of input: 191 DAG size of output: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:28:47,354 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2332#(and (exists ((v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_9 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_9 Int) (aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9_67 Int)) (and (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_9) (+ (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9_67 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9_67 18446744073709551616) (+ (- 18446744073709551616) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9_67 18446744073709551616))) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_9)) 256) 0)) (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9_67) (<= aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9_67 18446744073709551614))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 5 |~#s_can_fail_allocator_static~0.base|) (exists ((|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| Int)) (and (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 4)) (= (select |#valid| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|) 1) (not (= 5 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 2)) (= (select |#length| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|) 16) (not (= (mod (ite (= (ite (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 0)) 1 0) 0) 0 1) 256) 0)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 0)) (< |#StackHeapBarrier| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 3)) (<= 0 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|))) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (<= 0 ~tl_last_error~0) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (<= 0 |#NULL.offset|) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:28:47,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:28:47,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:28:47,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18, 17] total 39 [2022-11-03 03:28:47,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312052922] [2022-11-03 03:28:47,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:28:47,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 03:28:47,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:47,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 03:28:47,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2867, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 03:28:47,358 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 39 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:28:48,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:48,375 INFO L93 Difference]: Finished difference Result 115 states and 153 transitions. [2022-11-03 03:28:48,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 03:28:48,376 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 35 [2022-11-03 03:28:48,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:48,378 INFO L225 Difference]: With dead ends: 115 [2022-11-03 03:28:48,378 INFO L226 Difference]: Without dead ends: 67 [2022-11-03 03:28:48,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=248, Invalid=3174, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 03:28:48,380 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:48,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 335 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 284 Invalid, 0 Unknown, 78 Unchecked, 0.7s Time] [2022-11-03 03:28:48,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-03 03:28:48,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2022-11-03 03:28:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 50 states have internal predecessors, (67), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-03 03:28:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 85 transitions. [2022-11-03 03:28:48,402 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 85 transitions. Word has length 35 [2022-11-03 03:28:48,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:48,402 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 85 transitions. [2022-11-03 03:28:48,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:28:48,403 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 85 transitions. [2022-11-03 03:28:48,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 03:28:48,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:48,405 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:48,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:48,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:48,612 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:48,612 INFO L85 PathProgramCache]: Analyzing trace with hash 277695749, now seen corresponding path program 1 times [2022-11-03 03:28:48,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:48,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708618007] [2022-11-03 03:28:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:48,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 03:28:48,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:48,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708618007] [2022-11-03 03:28:48,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708618007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:48,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:48,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:28:48,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182284902] [2022-11-03 03:28:48,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:48,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:28:48,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:48,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:28:48,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:28:48,809 INFO L87 Difference]: Start difference. First operand 65 states and 85 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 03:28:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:48,876 INFO L93 Difference]: Finished difference Result 72 states and 91 transitions. [2022-11-03 03:28:48,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:28:48,877 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2022-11-03 03:28:48,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:48,878 INFO L225 Difference]: With dead ends: 72 [2022-11-03 03:28:48,878 INFO L226 Difference]: Without dead ends: 65 [2022-11-03 03:28:48,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:28:48,880 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:48,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 133 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:28:48,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-03 03:28:48,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-03 03:28:48,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 50 states have internal predecessors, (67), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-03 03:28:48,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2022-11-03 03:28:48,907 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 39 [2022-11-03 03:28:48,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:48,908 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2022-11-03 03:28:48,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-03 03:28:48,908 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2022-11-03 03:28:48,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 03:28:48,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:48,919 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:48,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:28:48,920 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:48,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:48,921 INFO L85 PathProgramCache]: Analyzing trace with hash 258020431, now seen corresponding path program 5 times [2022-11-03 03:28:48,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:48,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778225471] [2022-11-03 03:28:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:48,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:28:49,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:49,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778225471] [2022-11-03 03:28:49,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778225471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:28:49,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94259465] [2022-11-03 03:28:49,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:28:49,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:49,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:49,459 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:28:49,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:28:49,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 03:28:49,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:28:49,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-03 03:28:49,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:49,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:49,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-03 03:28:49,964 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:28:49,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-11-03 03:28:50,025 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:28:50,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2022-11-03 03:28:50,121 INFO L356 Elim1Store]: treesize reduction 70, result has 33.3 percent of original size [2022-11-03 03:28:50,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 57 [2022-11-03 03:28:50,189 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:28:50,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2022-11-03 03:28:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:28:50,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:28:50,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94259465] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:28:50,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1617565558] [2022-11-03 03:28:50,516 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 03:28:50,517 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:28:50,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:28:50,517 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:28:50,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:28:50,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:50,591 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 03:28:50,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 03:28:50,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:50,673 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:28:50,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:28:50,701 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2022-11-03 03:28:50,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:28:50,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:28:50,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:28:50,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:28:50,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:50,914 INFO L356 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-03 03:28:50,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 56 [2022-11-03 03:28:50,938 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:28:50,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 50 [2022-11-03 03:28:50,968 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:28:50,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 46 [2022-11-03 03:28:50,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:50,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:28:50,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:51,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:51,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:28:51,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:28:51,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:28:51,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:28:51,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 545 treesize of output 489 [2022-11-03 03:28:51,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 489 treesize of output 473 [2022-11-03 03:28:51,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 473 treesize of output 417 [2022-11-03 03:28:51,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:28:51,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:51,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:28:51,793 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs [2022-11-03 03:28:52,018 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2022-11-03 03:28:52,044 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 76 for LOIs [2022-11-03 03:28:52,167 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 133 for LOIs [2022-11-03 03:28:52,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:28:52,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:52,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:52,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:28:52,608 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:00,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2976#(and (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| Int)) (and (= (select |#valid| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57|) 1) (not (= (mod (ite (= (ite (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| 0)) 1 0) 0) 0 1) 256) 0)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| 0)) (<= 0 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57|) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| 2)) (= 16 (select |#length| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57|)) (not (= 5 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57|)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| 4)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57| 3)) (< |#StackHeapBarrier| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_57|))) (exists ((aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11_68 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_11 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_11 Int)) (and (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11_68) (<= aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11_68 18446744073709551614) (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_11) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_11 (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11_68 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11_68 18446744073709551616) (+ (- 18446744073709551616) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11_68 18446744073709551616))))) 256) 0)))) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= ~tl_last_error~0 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:00,647 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:00,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:29:00,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-03 03:29:00,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253105557] [2022-11-03 03:29:00,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:00,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 03:29:00,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:00,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 03:29:00,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1162, Unknown=1, NotChecked=0, Total=1260 [2022-11-03 03:29:00,650 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 17 states, 15 states have (on average 2.2) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:29:00,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:00,899 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2022-11-03 03:29:00,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 03:29:00,900 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2022-11-03 03:29:00,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:00,901 INFO L225 Difference]: With dead ends: 116 [2022-11-03 03:29:00,901 INFO L226 Difference]: Without dead ends: 66 [2022-11-03 03:29:00,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=103, Invalid=1228, Unknown=1, NotChecked=0, Total=1332 [2022-11-03 03:29:00,903 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:00,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 171 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:29:00,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-03 03:29:00,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-03 03:29:00,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 51 states have internal predecessors, (68), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-03 03:29:00,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 85 transitions. [2022-11-03 03:29:00,920 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 85 transitions. Word has length 38 [2022-11-03 03:29:00,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:00,920 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 85 transitions. [2022-11-03 03:29:00,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:29:00,921 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 85 transitions. [2022-11-03 03:29:00,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 03:29:00,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:00,922 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:00,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:01,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 03:29:01,132 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:01,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:01,133 INFO L85 PathProgramCache]: Analyzing trace with hash -576668563, now seen corresponding path program 6 times [2022-11-03 03:29:01,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:01,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935649379] [2022-11-03 03:29:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:01,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:01,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:01,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935649379] [2022-11-03 03:29:01,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935649379] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:01,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028850570] [2022-11-03 03:29:01,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:29:01,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:01,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:01,746 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:01,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:29:02,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:29:02,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:29:02,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-03 03:29:02,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:02,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:02,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 03:29:02,253 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:02,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 30 treesize of output 32 [2022-11-03 03:29:02,314 INFO L356 Elim1Store]: treesize reduction 52, result has 33.3 percent of original size [2022-11-03 03:29:02,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 45 [2022-11-03 03:29:02,387 INFO L356 Elim1Store]: treesize reduction 76, result has 25.5 percent of original size [2022-11-03 03:29:02,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 50 treesize of output 58 [2022-11-03 03:29:02,484 INFO L356 Elim1Store]: treesize reduction 100, result has 20.6 percent of original size [2022-11-03 03:29:02,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 60 treesize of output 71 [2022-11-03 03:29:02,559 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:02,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2022-11-03 03:29:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:04,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:08,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 102 [2022-11-03 03:29:08,921 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:08,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 4236 treesize of output 4228 [2022-11-03 03:29:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:09,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028850570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:09,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2138162709] [2022-11-03 03:29:09,207 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 03:29:09,207 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:09,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:09,208 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:09,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:09,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:09,289 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:29:09,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:29:09,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:09,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 03:29:09,323 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2022-11-03 03:29:09,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:29:09,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:29:09,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:29:09,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:29:09,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:09,540 INFO L356 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-03 03:29:09,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 56 [2022-11-03 03:29:09,573 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:29:09,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 50 [2022-11-03 03:29:09,598 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:29:09,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 46 [2022-11-03 03:29:09,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:09,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:09,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:09,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:09,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:09,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:09,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:09,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:09,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:09,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:09,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:09,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:09,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:09,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:09,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:09,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:09,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:09,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:09,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:09,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:09,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:09,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:09,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:09,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:10,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 545 treesize of output 489 [2022-11-03 03:29:10,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 489 treesize of output 433 [2022-11-03 03:29:10,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 433 treesize of output 417 [2022-11-03 03:29:10,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:10,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:10,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:10,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:10,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:10,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:10,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:10,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:10,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:10,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:10,447 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs [2022-11-03 03:29:10,634 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2022-11-03 03:29:10,659 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 76 for LOIs [2022-11-03 03:29:10,809 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 135 for LOIs [2022-11-03 03:29:11,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:11,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:11,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:11,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:11,300 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:23,273 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3541#(and (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= ~tl_last_error~0 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (exists ((|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| Int)) (and (= (select |#valid| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67|) 1) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| 0)) (= 16 (select |#length| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67|)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| 4)) (not (= (mod (ite (= (ite (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| 0)) 1 0) 0) 0 1) 256) 0)) (< |#StackHeapBarrier| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67|) (<= 0 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67|) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| 2)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| 3)) (not (= 5 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67|)))) (exists ((aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13_68 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_13 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_13 Int)) (and (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13_68) (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_13) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_13 (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13_68 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13_68 18446744073709551616) (+ (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13_68 18446744073709551616) (- 18446744073709551616))))) 256) 0)) (<= aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13_68 18446744073709551614))))' at error location [2022-11-03 03:29:23,273 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:23,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:29:23,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21, 20] total 47 [2022-11-03 03:29:23,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500755397] [2022-11-03 03:29:23,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:23,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-03 03:29:23,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:23,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-03 03:29:23,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=3787, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 03:29:23,276 INFO L87 Difference]: Start difference. First operand 66 states and 85 transitions. Second operand has 47 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 46 states have internal predecessors, (71), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:29:24,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:24,788 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2022-11-03 03:29:24,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-03 03:29:24,789 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 46 states have internal predecessors, (71), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 39 [2022-11-03 03:29:24,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:24,790 INFO L225 Difference]: With dead ends: 125 [2022-11-03 03:29:24,790 INFO L226 Difference]: Without dead ends: 73 [2022-11-03 03:29:24,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=331, Invalid=4781, Unknown=0, NotChecked=0, Total=5112 [2022-11-03 03:29:24,793 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 33 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:24,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 508 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 293 Invalid, 0 Unknown, 88 Unchecked, 0.6s Time] [2022-11-03 03:29:24,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-03 03:29:24,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-11-03 03:29:24,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 56 states have internal predecessors, (76), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-03 03:29:24,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2022-11-03 03:29:24,814 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 39 [2022-11-03 03:29:24,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:24,814 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2022-11-03 03:29:24,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 46 states have internal predecessors, (71), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:29:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2022-11-03 03:29:24,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 03:29:24,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:24,816 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:24,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:25,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 03:29:25,020 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:25,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:25,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1197965554, now seen corresponding path program 1 times [2022-11-03 03:29:25,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:25,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239363650] [2022-11-03 03:29:25,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:25,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 03:29:25,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:25,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239363650] [2022-11-03 03:29:25,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239363650] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:25,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171455392] [2022-11-03 03:29:25,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:25,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:25,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:25,600 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:25,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:29:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:25,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:29:25,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 03:29:25,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 03:29:26,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171455392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:26,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1585372421] [2022-11-03 03:29:26,047 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-03 03:29:26,047 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:26,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:26,047 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:26,048 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:26,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,138 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:29:26,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:29:26,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-03 03:29:26,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:26,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:26,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:26,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:26,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-03 03:29:26,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-03 03:29:26,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2022-11-03 03:29:26,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:26,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:26,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:26,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:26,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:26,383 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2022-11-03 03:29:26,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:26,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:26,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:26,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:26,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:26,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:26,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:26,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:26,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:27,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:27,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:27,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:27,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:27,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:27,145 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2022-11-03 03:29:27,170 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 82 for LOIs [2022-11-03 03:29:27,238 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 78 for LOIs [2022-11-03 03:29:27,266 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 135 for LOIs [2022-11-03 03:29:27,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:27,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:27,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:27,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:27,704 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:32,539 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4127#(and (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (exists ((|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| Int)) (and (not (= (mod (select (select |#memory_int| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87|) 0) 256) 0)) (< |#StackHeapBarrier| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87|) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| 4)) (not (= (mod (ite (= (ite (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| 0)) 1 0) 0) 0 1) 256) 0)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| 3)) (= 16 (select |#length| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87|)) (not (= 5 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87|)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| 2)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| 0)) (<= 0 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87|) (= (select |#valid| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87|) 1))) (= (select |#valid| 0) 0) (= ~tl_last_error~0 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:32,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:32,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:29:32,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 4] total 17 [2022-11-03 03:29:32,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147750485] [2022-11-03 03:29:32,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:32,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 03:29:32,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:32,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 03:29:32,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 03:29:32,542 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 17 states, 16 states have (on average 2.9375) internal successors, (47), 17 states have internal predecessors, (47), 2 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:29:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:33,070 INFO L93 Difference]: Finished difference Result 132 states and 176 transitions. [2022-11-03 03:29:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 03:29:33,071 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.9375) internal successors, (47), 17 states have internal predecessors, (47), 2 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 42 [2022-11-03 03:29:33,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:33,073 INFO L225 Difference]: With dead ends: 132 [2022-11-03 03:29:33,073 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 03:29:33,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 03:29:33,077 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:33,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 247 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:29:33,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 03:29:33,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2022-11-03 03:29:33,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 57 states have internal predecessors, (73), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-03 03:29:33,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2022-11-03 03:29:33,106 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 42 [2022-11-03 03:29:33,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:33,107 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2022-11-03 03:29:33,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.9375) internal successors, (47), 17 states have internal predecessors, (47), 2 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:29:33,107 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2022-11-03 03:29:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 03:29:33,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:33,109 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:33,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:33,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 03:29:33,324 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:33,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:33,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2117284933, now seen corresponding path program 7 times [2022-11-03 03:29:33,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:33,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950454577] [2022-11-03 03:29:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:33,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 03:29:34,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:34,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950454577] [2022-11-03 03:29:34,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950454577] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:34,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419959975] [2022-11-03 03:29:34,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:29:34,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:34,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:34,003 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:34,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:29:34,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:34,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-03 03:29:34,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:34,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:34,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 03:29:34,478 INFO L356 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2022-11-03 03:29:34,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 03:29:34,542 INFO L356 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2022-11-03 03:29:34,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 03:29:34,610 INFO L356 Elim1Store]: treesize reduction 66, result has 20.5 percent of original size [2022-11-03 03:29:34,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 51 treesize of output 59 [2022-11-03 03:29:34,708 INFO L356 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2022-11-03 03:29:34,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 61 treesize of output 72 [2022-11-03 03:29:34,809 INFO L356 Elim1Store]: treesize reduction 98, result has 14.8 percent of original size [2022-11-03 03:29:34,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 71 treesize of output 85 [2022-11-03 03:29:34,887 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:34,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2022-11-03 03:29:34,967 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:34,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2022-11-03 03:29:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:36,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:42,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 128 treesize of output 124 [2022-11-03 03:29:42,319 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:42,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17918 treesize of output 17912 [2022-11-03 03:29:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:42,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419959975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:42,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [427208609] [2022-11-03 03:29:42,828 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 03:29:42,828 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:42,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:42,829 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:42,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:42,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,897 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 03:29:42,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 03:29:42,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:42,970 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:29:42,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:29:42,996 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2022-11-03 03:29:43,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:29:43,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:29:43,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:29:43,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:29:43,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:43,223 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:29:43,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 54 [2022-11-03 03:29:43,258 INFO L356 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-03 03:29:43,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-03 03:29:43,290 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:29:43,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 46 [2022-11-03 03:29:43,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:43,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:43,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:43,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:43,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:43,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:43,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:43,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:43,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:43,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 545 treesize of output 489 [2022-11-03 03:29:43,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 489 treesize of output 473 [2022-11-03 03:29:43,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 473 treesize of output 417 [2022-11-03 03:29:44,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:44,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:44,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:44,091 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs [2022-11-03 03:29:44,260 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2022-11-03 03:29:44,280 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 76 for LOIs [2022-11-03 03:29:44,406 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 135 for LOIs [2022-11-03 03:29:44,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:44,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:44,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:44,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:44,806 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:53,387 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4761#(and (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_20 Int) (aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_20_68 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_20 Int)) (and (<= aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_20_68 18446744073709551614) (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_20) (+ (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_20_68 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_20_68 18446744073709551616) (+ (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_20_68 18446744073709551616) (- 18446744073709551616))) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_20)) 256) 0)) (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_20_68))) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= ~tl_last_error~0 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (exists ((|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| Int)) (and (< |#StackHeapBarrier| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97|) (= (select |#length| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97|) 16) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| 3)) (not (= (mod (ite (= (ite (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| 0)) 1 0) 0) 0 1) 256) 0)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| 2)) (not (= 5 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97|)) (= (select |#valid| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97|) 1) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| 4)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97| 0)) (<= 0 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_97|))) (= 5 |~#s_can_fail_allocator_static~0.base|) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:29:53,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:53,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:29:53,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 24, 23] total 55 [2022-11-03 03:29:53,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584085996] [2022-11-03 03:29:53,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:53,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-03 03:29:53,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:53,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-03 03:29:53,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=4816, Unknown=0, NotChecked=0, Total=5112 [2022-11-03 03:29:53,391 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 55 states, 54 states have (on average 1.5) internal successors, (81), 54 states have internal predecessors, (81), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:29:55,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:55,166 INFO L93 Difference]: Finished difference Result 135 states and 175 transitions. [2022-11-03 03:29:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-03 03:29:55,168 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.5) internal successors, (81), 54 states have internal predecessors, (81), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 43 [2022-11-03 03:29:55,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:55,169 INFO L225 Difference]: With dead ends: 135 [2022-11-03 03:29:55,169 INFO L226 Difference]: Without dead ends: 79 [2022-11-03 03:29:55,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=332, Invalid=5070, Unknown=0, NotChecked=0, Total=5402 [2022-11-03 03:29:55,172 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:55,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 638 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 643 Invalid, 0 Unknown, 184 Unchecked, 1.5s Time] [2022-11-03 03:29:55,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-03 03:29:55,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-11-03 03:29:55,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 60 states have (on average 1.35) internal successors, (81), 62 states have internal predecessors, (81), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-03 03:29:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2022-11-03 03:29:55,196 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 43 [2022-11-03 03:29:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:55,197 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2022-11-03 03:29:55,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.5) internal successors, (81), 54 states have internal predecessors, (81), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:29:55,197 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2022-11-03 03:29:55,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 03:29:55,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:55,198 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:55,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:55,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 03:29:55,424 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:55,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:55,424 INFO L85 PathProgramCache]: Analyzing trace with hash 4814187, now seen corresponding path program 8 times [2022-11-03 03:29:55,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:55,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614224528] [2022-11-03 03:29:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:55,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 03:29:56,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:56,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614224528] [2022-11-03 03:29:56,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614224528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:56,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513954573] [2022-11-03 03:29:56,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:29:56,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:56,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:56,144 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:56,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:29:57,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-03 03:29:57,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:29:57,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-03 03:29:57,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:57,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:29:57,827 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 03:29:57,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-11-03 03:29:57,867 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:29:57,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 34 [2022-11-03 03:29:57,912 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:57,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2022-11-03 03:29:57,986 INFO L356 Elim1Store]: treesize reduction 70, result has 33.3 percent of original size [2022-11-03 03:29:57,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 57 [2022-11-03 03:29:58,079 INFO L356 Elim1Store]: treesize reduction 102, result has 25.5 percent of original size [2022-11-03 03:29:58,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 59 treesize of output 70 [2022-11-03 03:29:58,188 INFO L356 Elim1Store]: treesize reduction 134, result has 20.7 percent of original size [2022-11-03 03:29:58,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 83 [2022-11-03 03:29:58,274 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:29:58,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2022-11-03 03:29:58,420 INFO L356 Elim1Store]: treesize reduction 142, result has 33.3 percent of original size [2022-11-03 03:29:58,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 85 treesize of output 105 [2022-11-03 03:29:58,606 INFO L356 Elim1Store]: treesize reduction 206, result has 25.6 percent of original size [2022-11-03 03:29:58,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 95 treesize of output 118 [2022-11-03 03:29:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 03:29:58,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:59,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513954573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:59,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [166910764] [2022-11-03 03:29:59,056 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 03:29:59,057 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:59,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:59,057 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:59,058 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:59,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,142 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 03:29:59,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 03:29:59,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,230 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:29:59,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:29:59,254 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2022-11-03 03:29:59,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:29:59,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:29:59,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:29:59,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:29:59,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:59,462 INFO L356 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-03 03:29:59,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 56 [2022-11-03 03:29:59,485 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:29:59,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 50 [2022-11-03 03:29:59,507 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:29:59,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 46 [2022-11-03 03:29:59,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:59,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:59,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:29:59,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:29:59,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:59,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:59,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:59,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:59,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:29:59,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 545 treesize of output 489 [2022-11-03 03:29:59,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 489 treesize of output 433 [2022-11-03 03:29:59,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 433 treesize of output 417 [2022-11-03 03:30:00,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:00,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:00,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:00,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:00,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:30:00,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:00,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:00,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:00,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:00,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:30:00,247 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs [2022-11-03 03:30:00,419 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2022-11-03 03:30:00,439 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 78 for LOIs [2022-11-03 03:30:00,554 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 133 for LOIs [2022-11-03 03:30:00,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:30:00,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:00,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:00,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:00,947 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:30:07,789 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5274#(and (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_128 Int)) (and (not (= 3 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_128)) (< |#StackHeapBarrier| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_128) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_128 4)) (= (select |#length| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_128) 16) (not (= 2 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_128)) (not (= (mod (ite (= (ite (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_128 0)) 1 0) 0) 0 1) 256) 0)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_128 0)) (<= 0 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_128) (not (= 5 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_128)) (= (select |#valid| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_128) 1))) (= 37 (select |#length| 2)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= ~tl_last_error~0 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_21 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_21 Int) (aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21_68 Int)) (and (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21_68) (<= aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21_68 18446744073709551614) (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_21) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_21 (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21_68 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21_68 18446744073709551616) (+ (- 18446744073709551616) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21_68 18446744073709551616))))) 256) 0)))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:30:07,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:30:07,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 03:30:07,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-11-03 03:30:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927709656] [2022-11-03 03:30:07,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 03:30:07,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 03:30:07,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:07,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 03:30:07,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1703, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 03:30:07,791 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand has 25 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 25 states have internal predecessors, (41), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:30:09,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:09,433 INFO L93 Difference]: Finished difference Result 136 states and 178 transitions. [2022-11-03 03:30:09,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 03:30:09,434 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 25 states have internal predecessors, (41), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-11-03 03:30:09,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:09,435 INFO L225 Difference]: With dead ends: 136 [2022-11-03 03:30:09,435 INFO L226 Difference]: Without dead ends: 78 [2022-11-03 03:30:09,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=154, Invalid=2602, Unknown=0, NotChecked=0, Total=2756 [2022-11-03 03:30:09,437 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:09,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 450 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 03:30:09,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-03 03:30:09,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-03 03:30:09,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 61 states have (on average 1.3442622950819672) internal successors, (82), 63 states have internal predecessors, (82), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-03 03:30:09,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2022-11-03 03:30:09,457 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 46 [2022-11-03 03:30:09,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:09,457 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2022-11-03 03:30:09,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 25 states have internal predecessors, (41), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 03:30:09,458 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2022-11-03 03:30:09,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 03:30:09,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:09,459 INFO L195 NwaCegarLoop]: trace histogram [11, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:09,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:09,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 03:30:09,661 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:09,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:09,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1751523209, now seen corresponding path program 9 times [2022-11-03 03:30:09,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:09,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641724483] [2022-11-03 03:30:09,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:09,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 03:30:10,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:10,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641724483] [2022-11-03 03:30:10,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641724483] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:10,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513401795] [2022-11-03 03:30:10,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:30:10,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:10,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:10,502 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:10,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 03:30:11,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:30:11,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:30:11,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-03 03:30:11,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:11,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:11,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 03:30:11,333 INFO L356 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2022-11-03 03:30:11,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 03:30:11,397 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:30:11,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2022-11-03 03:30:11,525 INFO L356 Elim1Store]: treesize reduction 70, result has 33.3 percent of original size [2022-11-03 03:30:11,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 57 [2022-11-03 03:30:11,660 INFO L356 Elim1Store]: treesize reduction 102, result has 25.5 percent of original size [2022-11-03 03:30:11,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 59 treesize of output 70 [2022-11-03 03:30:11,764 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:30:11,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2022-11-03 03:30:11,936 INFO L356 Elim1Store]: treesize reduction 124, result has 33.3 percent of original size [2022-11-03 03:30:11,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 93 [2022-11-03 03:30:12,114 INFO L356 Elim1Store]: treesize reduction 180, result has 25.6 percent of original size [2022-11-03 03:30:12,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 86 treesize of output 106 [2022-11-03 03:30:12,324 INFO L356 Elim1Store]: treesize reduction 236, result has 20.8 percent of original size [2022-11-03 03:30:12,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 43 case distinctions, treesize of input 96 treesize of output 119 [2022-11-03 03:30:12,451 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:30:12,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2022-11-03 03:30:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:15,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:27,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 154 treesize of output 150 [2022-11-03 03:30:27,640 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:30:27,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71748 treesize of output 71740 [2022-11-03 03:30:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 24 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:30:28,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513401795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:28,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1956530820] [2022-11-03 03:30:28,962 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 03:30:28,963 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:30:28,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:30:28,963 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:30:28,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:30:28,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,035 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 03:30:29,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 03:30:29,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,113 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:30:29,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:30:29,140 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2022-11-03 03:30:29,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:29,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:29,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:29,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:30:29,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:29,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-03 03:30:29,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-03 03:30:29,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2022-11-03 03:30:29,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:29,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:29,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:29,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:30:29,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:30:29,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:30:29,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:30:29,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:29,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:30:29,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 545 treesize of output 489 [2022-11-03 03:30:29,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 489 treesize of output 473 [2022-11-03 03:30:29,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 473 treesize of output 417 [2022-11-03 03:30:30,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:30,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:30,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:30,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:30,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:30:30,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:30,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:30,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:30,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:30,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:30:30,156 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs [2022-11-03 03:30:30,356 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2022-11-03 03:30:30,377 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 78 for LOIs [2022-11-03 03:30:30,491 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 135 for LOIs [2022-11-03 03:30:30,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:30:30,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:30,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:30,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:30,904 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:30:45,400 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5972#(and (exists ((|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_117| Int)) (and (= (select |#valid| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_117|) 1) (not (= (mod (ite (= (ite (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_117| 0)) 1 0) 0) 0 1) 256) 0)) (<= 0 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_117|) (= 16 (select |#length| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_117|)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_117| 4)) (< |#StackHeapBarrier| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_117|) (not (= 5 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_117|)) (not (= 3 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_117|)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_117| 0)) (not (= 2 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_117|)))) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (<= 5 |~#s_can_fail_allocator_static~0.base|) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (<= |~#s_can_fail_allocator_static~0.base| 5) (<= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (exists ((aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_23_68 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_23 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_23 Int)) (and (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_23_68) (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_23) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_23 (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_23_68 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_23_68 18446744073709551616) (+ (- 18446744073709551616) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_23_68 18446744073709551616))))) 256) 0)) (<= aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_23_68 18446744073709551614))) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (<= 0 |#NULL.offset|) (< 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-11-03 03:30:45,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:30:45,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:30:45,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 27, 26] total 63 [2022-11-03 03:30:45,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418401446] [2022-11-03 03:30:45,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:30:45,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-03 03:30:45,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:45,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-03 03:30:45,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=5886, Unknown=0, NotChecked=0, Total=6320 [2022-11-03 03:30:45,404 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand has 63 states, 62 states have (on average 1.467741935483871) internal successors, (91), 62 states have internal predecessors, (91), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:30:48,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:30:48,053 INFO L93 Difference]: Finished difference Result 145 states and 191 transitions. [2022-11-03 03:30:48,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-03 03:30:48,054 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.467741935483871) internal successors, (91), 62 states have internal predecessors, (91), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2022-11-03 03:30:48,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:30:48,055 INFO L225 Difference]: With dead ends: 145 [2022-11-03 03:30:48,055 INFO L226 Difference]: Without dead ends: 85 [2022-11-03 03:30:48,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1907 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=500, Invalid=6640, Unknown=0, NotChecked=0, Total=7140 [2022-11-03 03:30:48,058 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:30:48,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 579 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 602 Invalid, 0 Unknown, 149 Unchecked, 1.7s Time] [2022-11-03 03:30:48,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-03 03:30:48,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2022-11-03 03:30:48,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 68 states have internal predecessors, (90), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-03 03:30:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 107 transitions. [2022-11-03 03:30:48,084 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 107 transitions. Word has length 47 [2022-11-03 03:30:48,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:30:48,085 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 107 transitions. [2022-11-03 03:30:48,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 1.467741935483871) internal successors, (91), 62 states have internal predecessors, (91), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-03 03:30:48,085 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 107 transitions. [2022-11-03 03:30:48,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-03 03:30:48,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:30:48,086 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:30:48,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:30:48,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:48,296 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:30:48,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:30:48,297 INFO L85 PathProgramCache]: Analyzing trace with hash -444774102, now seen corresponding path program 1 times [2022-11-03 03:30:48,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:30:48,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805699008] [2022-11-03 03:30:48,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:48,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:30:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:30:49,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:30:49,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805699008] [2022-11-03 03:30:49,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805699008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:30:49,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869358102] [2022-11-03 03:30:49,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:30:49,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:30:49,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:30:49,161 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:30:49,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:30:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:30:49,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 03:30:49,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:30:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 03:30:49,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:30:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-03 03:30:50,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869358102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:30:50,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [333966071] [2022-11-03 03:30:50,031 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-03 03:30:50,032 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:30:50,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:30:50,032 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:30:50,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:30:50,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:50,104 INFO L356 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-03 03:30:50,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-03 03:30:50,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:50,186 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 03:30:50,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-03 03:30:50,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:50,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:50,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:50,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:30:50,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-03 03:30:50,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2022-11-03 03:30:50,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-03 03:30:50,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:50,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:50,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:50,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:50,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:30:50,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:50,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:50,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:50,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:50,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:30:50,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:50,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:50,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:50,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:50,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:30:50,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:50,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:50,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:50,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:50,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:30:50,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:50,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:50,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:50,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:50,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:30:50,708 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2022-11-03 03:30:51,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:30:51,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:30:51,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:30:51,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:30:51,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:30:51,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:30:51,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-03 03:30:51,536 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2022-11-03 03:30:51,556 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 33 for LOIs [2022-11-03 03:30:51,572 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 96 for LOIs [2022-11-03 03:30:51,700 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 133 for LOIs [2022-11-03 03:30:52,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:52,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:52,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:30:52,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:30:52,120 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:30:58,402 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6662#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 03:30:58,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:30:58,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:30:58,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 6] total 27 [2022-11-03 03:30:58,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484264105] [2022-11-03 03:30:58,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:30:58,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 03:30:58,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:30:58,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 03:30:58,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2301, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 03:30:58,405 INFO L87 Difference]: Start difference. First operand 83 states and 107 transitions. Second operand has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:31:00,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:31:00,157 INFO L93 Difference]: Finished difference Result 160 states and 208 transitions. [2022-11-03 03:31:00,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 03:31:00,159 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 50 [2022-11-03 03:31:00,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:31:00,160 INFO L225 Difference]: With dead ends: 160 [2022-11-03 03:31:00,160 INFO L226 Difference]: Without dead ends: 94 [2022-11-03 03:31:00,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=263, Invalid=4159, Unknown=0, NotChecked=0, Total=4422 [2022-11-03 03:31:00,162 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 52 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:31:00,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 277 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:31:00,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-03 03:31:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2022-11-03 03:31:00,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 69 states have internal predecessors, (83), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-03 03:31:00,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2022-11-03 03:31:00,195 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 50 [2022-11-03 03:31:00,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:31:00,195 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2022-11-03 03:31:00,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:31:00,196 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2022-11-03 03:31:00,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-03 03:31:00,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:31:00,196 INFO L195 NwaCegarLoop]: trace histogram [13, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:31:00,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:31:00,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 03:31:00,412 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:31:00,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:31:00,413 INFO L85 PathProgramCache]: Analyzing trace with hash 775788503, now seen corresponding path program 10 times [2022-11-03 03:31:00,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:31:00,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071928192] [2022-11-03 03:31:00,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:31:00,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:31:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-03 03:31:01,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:31:01,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071928192] [2022-11-03 03:31:01,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071928192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:31:01,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535218430] [2022-11-03 03:31:01,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:31:01,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:31:01,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:31:01,316 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:31:01,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2598b3f4-f92e-4b00-a63b-7e98c01377b7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:31:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:31:02,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-03 03:31:02,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:31:02,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-03 03:31:02,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 03:31:02,315 INFO L356 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2022-11-03 03:31:02,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 33 [2022-11-03 03:31:02,419 INFO L356 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2022-11-03 03:31:02,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 03:31:02,531 INFO L356 Elim1Store]: treesize reduction 66, result has 20.5 percent of original size [2022-11-03 03:31:02,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 51 treesize of output 59 [2022-11-03 03:31:02,616 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:31:02,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2022-11-03 03:31:02,705 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:31:02,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2022-11-03 03:31:02,804 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:31:02,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2022-11-03 03:31:02,984 INFO L356 Elim1Store]: treesize reduction 142, result has 33.3 percent of original size [2022-11-03 03:31:02,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 85 treesize of output 105 [2022-11-03 03:31:03,083 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:31:03,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2022-11-03 03:31:03,196 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:31:03,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2022-11-03 03:31:03,417 INFO L356 Elim1Store]: treesize reduction 178, result has 33.3 percent of original size [2022-11-03 03:31:03,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 102 treesize of output 128 [2022-11-03 03:31:03,649 INFO L356 Elim1Store]: treesize reduction 178, result has 33.3 percent of original size [2022-11-03 03:31:03,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 102 treesize of output 128 [2022-11-03 03:31:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:31:07,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:31:34,478 WARN L234 SmtUtils]: Spent 16.19s on a formula simplification. DAG size of input: 179 DAG size of output: 177 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-03 03:32:47,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 174 treesize of output 170 [2022-11-03 03:32:47,215 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:32:47,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158701324 treesize of output 158697100 [2022-11-03 03:41:09,614 WARN L234 SmtUtils]: Spent 8.37m on a formula simplification that was a NOOP. DAG size: 2236 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)