./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P --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 82914be9df39aade96902f979c145aa97bb18d611f7f0e9a90ee0ab6b53af5a2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:47:14,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:47:14,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:47:14,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:47:14,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:47:14,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:47:14,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:47:14,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:47:14,277 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:47:14,278 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:47:14,280 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:47:14,282 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:47:14,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:47:14,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:47:14,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:47:14,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:47:14,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:47:14,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:47:14,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:47:14,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:47:14,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:47:14,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:47:14,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:47:14,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:47:14,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:47:14,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:47:14,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:47:14,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:47:14,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:47:14,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:47:14,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:47:14,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:47:14,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:47:14,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:47:14,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:47:14,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:47:14,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:47:14,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:47:14,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:47:14,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:47:14,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:47:14,325 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:47:14,369 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:47:14,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:47:14,370 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:47:14,370 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:47:14,371 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:47:14,371 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:47:14,372 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:47:14,372 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:47:14,379 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:47:14,379 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:47:14,380 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:47:14,381 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:47:14,381 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:47:14,381 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:47:14,382 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:47:14,382 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:47:14,382 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:47:14,382 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:47:14,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:47:14,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:47:14,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:47:14,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:47:14,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:47:14,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:47:14,386 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:47:14,386 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:47:14,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:47:14,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:47:14,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:47:14,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:47:14,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:47:14,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:47:14,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:47:14,393 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:47:14,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:47:14,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:47:14,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:47:14,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:47:14,394 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82914be9df39aade96902f979c145aa97bb18d611f7f0e9a90ee0ab6b53af5a2 [2021-11-21 01:47:14,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:47:14,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:47:14,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:47:14,801 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:47:14,802 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:47:14,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i [2021-11-21 01:47:14,880 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P/data/e99cd28cb/d00c9eb0f4884947ae81b60b79a1e245/FLAG455ccc0ed [2021-11-21 01:47:15,924 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:47:15,925 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i [2021-11-21 01:47:16,002 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P/data/e99cd28cb/d00c9eb0f4884947ae81b60b79a1e245/FLAG455ccc0ed [2021-11-21 01:47:16,258 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P/data/e99cd28cb/d00c9eb0f4884947ae81b60b79a1e245 [2021-11-21 01:47:16,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:47:16,264 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:47:16,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:47:16,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:47:16,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:47:16,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:47:16" (1/1) ... [2021-11-21 01:47:16,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5733221d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:16, skipping insertion in model container [2021-11-21 01:47:16,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:47:16" (1/1) ... [2021-11-21 01:47:16,295 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:47:16,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:47:16,832 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_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4501,4514] [2021-11-21 01:47:16,842 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_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4561,4574] [2021-11-21 01:47:18,094 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:18,095 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:18,096 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:18,097 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:18,098 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:18,116 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:18,117 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:18,119 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:18,120 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:18,575 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:47:18,577 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:47:18,578 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:47:18,580 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:47:18,582 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:47:18,583 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:47:18,584 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:47:18,585 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:47:18,586 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:47:18,586 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:47:18,850 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:47:19,044 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:19,044 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:19,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:47:19,231 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:47:19,261 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_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4501,4514] [2021-11-21 01:47:19,268 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_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_ignore_case_harness.i[4561,4574] [2021-11-21 01:47:19,321 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:19,322 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:19,322 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:19,331 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:19,332 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:19,347 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:19,348 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:19,350 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:19,351 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:19,417 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:47:19,418 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:47:19,419 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:47:19,420 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:47:19,421 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:47:19,421 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:47:19,422 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:47:19,423 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:47:19,423 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:47:19,427 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:47:19,491 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:47:19,578 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:19,578 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:47:19,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:47:19,906 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:47:19,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:19 WrapperNode [2021-11-21 01:47:19,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:47:19,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:47:19,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:47:19,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:47:19,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:19" (1/1) ... [2021-11-21 01:47:20,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:19" (1/1) ... [2021-11-21 01:47:20,206 INFO L137 Inliner]: procedures = 691, calls = 2661, calls flagged for inlining = 59, calls inlined = 5, statements flattened = 862 [2021-11-21 01:47:20,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:47:20,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:47:20,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:47:20,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:47:20,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:19" (1/1) ... [2021-11-21 01:47:20,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:19" (1/1) ... [2021-11-21 01:47:20,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:19" (1/1) ... [2021-11-21 01:47:20,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:19" (1/1) ... [2021-11-21 01:47:20,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:19" (1/1) ... [2021-11-21 01:47:20,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:19" (1/1) ... [2021-11-21 01:47:20,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:19" (1/1) ... [2021-11-21 01:47:20,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:47:20,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:47:20,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:47:20,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:47:20,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:19" (1/1) ... [2021-11-21 01:47:20,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:47:20,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:20,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:47:20,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:47:20,460 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-21 01:47:20,460 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-21 01:47:20,460 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_ignore_case [2021-11-21 01:47:20,465 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_ignore_case [2021-11-21 01:47:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:47:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-21 01:47:20,466 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-21 01:47:20,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:47:20,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:47:20,467 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:47:20,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:47:20,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:47:20,468 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-21 01:47:20,468 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-21 01:47:20,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:47:20,469 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-21 01:47:20,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-21 01:47:20,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:47:20,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:47:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-21 01:47:20,470 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-21 01:47:20,470 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-21 01:47:20,470 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-21 01:47:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:47:20,471 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:47:20,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:47:20,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:47:20,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:47:20,472 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-21 01:47:20,472 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-21 01:47:20,472 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_bounded [2021-11-21 01:47:20,472 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_bounded [2021-11-21 01:47:20,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:47:20,473 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_buf_equivalence [2021-11-21 01:47:20,473 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_buf_equivalence [2021-11-21 01:47:20,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:47:20,814 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:47:20,829 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:47:22,513 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:47:22,676 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:47:22,676 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:47:22,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:47:22 BoogieIcfgContainer [2021-11-21 01:47:22,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:47:22,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:47:22,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:47:22,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:47:22,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:47:16" (1/3) ... [2021-11-21 01:47:22,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7566570a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:47:22, skipping insertion in model container [2021-11-21 01:47:22,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:47:19" (2/3) ... [2021-11-21 01:47:22,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7566570a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:47:22, skipping insertion in model container [2021-11-21 01:47:22,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:47:22" (3/3) ... [2021-11-21 01:47:22,688 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_eq_ignore_case_harness.i [2021-11-21 01:47:22,694 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:47:22,694 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:47:22,752 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:47:22,759 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:47:22,760 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:47:22,783 INFO L276 IsEmpty]: Start isEmpty. Operand has 113 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 58 states have internal predecessors, (69), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-21 01:47:22,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-21 01:47:22,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:22,794 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:22,795 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:22,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:22,801 INFO L85 PathProgramCache]: Analyzing trace with hash 599684611, now seen corresponding path program 1 times [2021-11-21 01:47:22,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:22,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108320039] [2021-11-21 01:47:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:22,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-21 01:47:25,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:25,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108320039] [2021-11-21 01:47:25,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108320039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:47:25,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:47:25,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-21 01:47:25,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505275236] [2021-11-21 01:47:25,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:47:25,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:47:25,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:47:25,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:47:25,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:47:25,899 INFO L87 Difference]: Start difference. First operand has 113 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 58 states have internal predecessors, (69), 42 states have call successors, (42), 12 states have call predecessors, (42), 12 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 9 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-21 01:47:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:47:28,195 INFO L93 Difference]: Finished difference Result 198 states and 297 transitions. [2021-11-21 01:47:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:47:28,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 9 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) Word has length 81 [2021-11-21 01:47:28,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:47:28,216 INFO L225 Difference]: With dead ends: 198 [2021-11-21 01:47:28,216 INFO L226 Difference]: Without dead ends: 145 [2021-11-21 01:47:28,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:47:28,239 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 104 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:47:28,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 627 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-21 01:47:28,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-21 01:47:28,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 127. [2021-11-21 01:47:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 67 states have internal predecessors, (74), 49 states have call successors, (49), 12 states have call predecessors, (49), 14 states have return successors, (53), 47 states have call predecessors, (53), 48 states have call successors, (53) [2021-11-21 01:47:28,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 176 transitions. [2021-11-21 01:47:28,365 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 176 transitions. Word has length 81 [2021-11-21 01:47:28,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:47:28,366 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 176 transitions. [2021-11-21 01:47:28,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 9 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-21 01:47:28,367 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 176 transitions. [2021-11-21 01:47:28,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-21 01:47:28,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:47:28,384 INFO L514 BasicCegarLoop]: trace histogram [8, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:47:28,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:47:28,386 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:47:28,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:47:28,391 INFO L85 PathProgramCache]: Analyzing trace with hash -689011069, now seen corresponding path program 1 times [2021-11-21 01:47:28,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:47:28,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412071292] [2021-11-21 01:47:28,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:28,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:47:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-21 01:47:29,833 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:47:29,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412071292] [2021-11-21 01:47:29,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412071292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:47:29,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377292690] [2021-11-21 01:47:29,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:47:29,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:47:29,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:47:29,838 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:47:29,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d1ecf2b-c498-4340-9453-ac1ee70f0e28/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:47:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:47:30,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 2678 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-21 01:47:30,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:47:30,632 INFO L388 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 10 treesize of output 8 [2021-11-21 01:47:31,079 INFO L388 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 18 treesize of output 14 [2021-11-21 01:47:31,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:31,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 60 [2021-11-21 01:47:31,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:31,761 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-21 01:47:31,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 45 [2021-11-21 01:47:31,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:31,779 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 01:47:31,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2021-11-21 01:47:31,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:31,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:31,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2021-11-21 01:47:31,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:31,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:31,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:31,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:47:31,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-11-21 01:47:31,991 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-21 01:47:31,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 49 [2021-11-21 01:47:32,490 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-11-21 01:47:32,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 19 [2021-11-21 01:47:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 44 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:47:32,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:47:34,563 INFO L354 Elim1Store]: treesize reduction 156, result has 28.4 percent of original size [2021-11-21 01:47:34,564 INFO L388 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 4 case distinctions, treesize of input 132 treesize of output 154 [2021-11-21 01:47:34,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:47:34,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 214 [2021-11-21 01:47:34,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:34,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:47:34,770 INFO L388 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 16 treesize of output 12 [2021-11-21 01:47:35,400 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-11-21 01:47:35,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 450 treesize of output 448 [2021-11-21 01:47:41,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377292690] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:47:41,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [305656834] [2021-11-21 01:47:41,520 INFO L159 IcfgInterpreter]: Started Sifa with 60 locations of interest [2021-11-21 01:47:41,520 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:47:41,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:47:41,532 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:47:41,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:48:08,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:08,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:08,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:08,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:48:09,132 INFO L244 Elim1Store]: Index analysis took 768 ms [2021-11-21 01:50:14,157 WARN L227 SmtUtils]: Spent 2.08m on a formula simplification. DAG size of input: 3167 DAG size of output: 1583 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:50:14,175 INFO L354 Elim1Store]: treesize reduction 7508, result has 25.5 percent of original size [2021-11-21 01:50:14,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 201 select indices, 201 select index equivalence classes, 19705 disjoint index pairs (out of 20100 index pairs), introduced 201 new quantified variables, introduced 594 case distinctions, treesize of input 1019 treesize of output 3189 [2021-11-21 01:50:57,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:50:57,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:50:57,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 198 select indices, 198 select index equivalence classes, 19900 disjoint index pairs (out of 19503 index pairs), introduced 198 new quantified variables, introduced 0 case distinctions, treesize of input 1000 treesize of output 1595