./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V --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 065f95e1f01b1c2bb5cc332c26e118823e72d0e75cb3966f20aacf6dc1740b4a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:21:16,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:21:16,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:21:16,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:21:16,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:21:16,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:21:16,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:21:16,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:21:16,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:21:16,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:21:16,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:21:16,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:21:16,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:21:16,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:21:16,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:21:16,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:21:16,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:21:16,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:21:16,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:21:16,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:21:16,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:21:16,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:21:16,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:21:16,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:21:16,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:21:16,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:21:16,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:21:16,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:21:16,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:21:16,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:21:16,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:21:16,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:21:16,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:21:16,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:21:16,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:21:16,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:21:16,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:21:16,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:21:16,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:21:16,457 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:21:16,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:21:16,459 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:21:16,504 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:21:16,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:21:16,504 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:21:16,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:21:16,505 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:21:16,506 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:21:16,506 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:21:16,506 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:21:16,506 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:21:16,506 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:21:16,507 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:21:16,507 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:21:16,507 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:21:16,507 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:21:16,507 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:21:16,508 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:21:16,508 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:21:16,508 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:21:16,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:21:16,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:21:16,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:21:16,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:21:16,510 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:21:16,510 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:21:16,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:21:16,510 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:21:16,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:21:16,511 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:21:16,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:21:16,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:21:16,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:21:16,512 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:21:16,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:21:16,512 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:21:16,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:21:16,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:21:16,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:21:16,513 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:21:16,513 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_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 065f95e1f01b1c2bb5cc332c26e118823e72d0e75cb3966f20aacf6dc1740b4a [2021-11-23 02:21:16,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:21:16,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:21:16,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:21:16,803 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:21:16,804 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:21:16,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i [2021-11-23 02:21:16,890 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/data/962a29977/c4e7406d1f8643b6aa61af09b62873bf/FLAGbc38fe2c9 [2021-11-23 02:21:17,792 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:21:17,793 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i [2021-11-23 02:21:17,842 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/data/962a29977/c4e7406d1f8643b6aa61af09b62873bf/FLAGbc38fe2c9 [2021-11-23 02:21:18,312 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/data/962a29977/c4e7406d1f8643b6aa61af09b62873bf [2021-11-23 02:21:18,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:21:18,316 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:21:18,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:21:18,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:21:18,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:21:18,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:21:18" (1/1) ... [2021-11-23 02:21:18,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c29d25b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:18, skipping insertion in model container [2021-11-23 02:21:18,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:21:18" (1/1) ... [2021-11-23 02:21:18,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:21:18,456 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:21:18,758 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_eee4b8b7-43fc-484c-90ff-a678f0f93e25/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i[4499,4512] [2021-11-23 02:21:18,764 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_eee4b8b7-43fc-484c-90ff-a678f0f93e25/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i[4559,4572] [2021-11-23 02:21:19,852 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:19,853 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:19,853 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:19,858 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:19,861 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:19,876 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:19,885 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:19,887 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:19,888 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:20,272 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 02:21:20,274 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 02:21:20,278 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 02:21:20,279 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 02:21:20,281 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 02:21:20,282 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 02:21:20,282 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 02:21:20,286 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 02:21:20,287 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 02:21:20,288 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 02:21:20,460 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 02:21:20,583 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:20,584 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:20,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:21:20,709 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:21:20,737 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_eee4b8b7-43fc-484c-90ff-a678f0f93e25/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i[4499,4512] [2021-11-23 02:21:20,739 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_eee4b8b7-43fc-484c-90ff-a678f0f93e25/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i[4559,4572] [2021-11-23 02:21:20,779 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:20,779 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:20,780 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:20,780 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:20,781 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:20,798 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:20,800 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:20,804 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:20,805 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:20,894 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 02:21:20,896 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 02:21:20,897 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 02:21:20,898 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 02:21:20,901 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 02:21:20,902 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 02:21:20,903 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 02:21:20,904 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 02:21:20,904 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 02:21:20,904 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 02:21:20,934 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 02:21:21,017 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:21,017 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:21:21,064 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:21:21,288 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:21:21,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:21 WrapperNode [2021-11-23 02:21:21,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:21:21,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:21:21,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:21:21,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:21:21,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:21" (1/1) ... [2021-11-23 02:21:21,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:21" (1/1) ... [2021-11-23 02:21:21,481 INFO L137 Inliner]: procedures = 691, calls = 2645, calls flagged for inlining = 62, calls inlined = 11, statements flattened = 975 [2021-11-23 02:21:21,481 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:21:21,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:21:21,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:21:21,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:21:21,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:21" (1/1) ... [2021-11-23 02:21:21,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:21" (1/1) ... [2021-11-23 02:21:21,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:21" (1/1) ... [2021-11-23 02:21:21,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:21" (1/1) ... [2021-11-23 02:21:21,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:21" (1/1) ... [2021-11-23 02:21:21,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:21" (1/1) ... [2021-11-23 02:21:21,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:21" (1/1) ... [2021-11-23 02:21:21,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:21:21,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:21:21,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:21:21,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:21:21,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:21" (1/1) ... [2021-11-23 02:21:21,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:21:21,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:21:21,695 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:21:21,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:21:21,750 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_read [2021-11-23 02:21:21,751 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_read [2021-11-23 02:21:21,752 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-23 02:21:21,752 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-23 02:21:21,753 INFO L130 BoogieDeclarations]: Found specification of procedure ntohl [2021-11-23 02:21:21,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:21:21,753 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-23 02:21:21,754 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-23 02:21:21,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2021-11-23 02:21:21,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:21:21,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:21:21,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:21:21,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 02:21:21,755 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 02:21:21,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 02:21:21,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 02:21:21,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:21:21,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:21:21,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:21:21,756 INFO L130 BoogieDeclarations]: Found specification of procedure aws_ntoh32 [2021-11-23 02:21:21,756 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_ntoh32 [2021-11-23 02:21:21,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:21:21,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:21:21,757 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-23 02:21:21,758 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-23 02:21:21,758 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-23 02:21:21,758 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-23 02:21:21,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:21:21,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:21:21,759 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-23 02:21:21,759 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-23 02:21:21,759 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:21:21,759 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:21:21,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:21:21,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:21:21,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:21:21,760 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-23 02:21:21,760 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-23 02:21:21,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:21:21,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2021-11-23 02:21:21,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:21:22,127 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:21:22,128 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:21:23,776 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:21:23,975 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:21:23,976 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:21:23,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:21:23 BoogieIcfgContainer [2021-11-23 02:21:23,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:21:23,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:21:23,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:21:23,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:21:23,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:21:18" (1/3) ... [2021-11-23 02:21:23,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@256dfae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:21:23, skipping insertion in model container [2021-11-23 02:21:23,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:21:21" (2/3) ... [2021-11-23 02:21:23,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@256dfae5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:21:23, skipping insertion in model container [2021-11-23 02:21:23,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:21:23" (3/3) ... [2021-11-23 02:21:23,989 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_read_be32_harness.i [2021-11-23 02:21:23,998 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:21:23,998 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:21:24,058 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:21:24,077 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 [2021-11-23 02:21:24,079 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:21:24,102 INFO L276 IsEmpty]: Start isEmpty. Operand has 126 states, 65 states have (on average 1.2) internal successors, (78), 66 states have internal predecessors, (78), 48 states have call successors, (48), 11 states have call predecessors, (48), 11 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-23 02:21:24,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 02:21:24,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:24,116 INFO L514 BasicCegarLoop]: trace histogram [9, 5, 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] [2021-11-23 02:21:24,119 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:24,126 INFO L85 PathProgramCache]: Analyzing trace with hash -840891144, now seen corresponding path program 1 times [2021-11-23 02:21:24,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:24,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947720194] [2021-11-23 02:21:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:24,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-23 02:21:25,632 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:25,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947720194] [2021-11-23 02:21:25,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947720194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:21:25,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835258939] [2021-11-23 02:21:25,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:25,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:21:25,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:21:25,637 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:21:25,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:21:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:26,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 2641 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-23 02:21:26,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:21:26,709 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 13 treesize of output 9 [2021-11-23 02:21:26,720 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 13 treesize of output 9 [2021-11-23 02:21:28,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:21:28,549 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:21:28,550 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 36 treesize of output 26 [2021-11-23 02:21:28,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:21:28,563 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:21:28,563 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 20 treesize of output 10 [2021-11-23 02:21:28,805 INFO L388 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 20 treesize of output 12 [2021-11-23 02:21:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-23 02:21:28,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:21:28,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835258939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:28,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:21:28,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 20 [2021-11-23 02:21:28,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957864134] [2021-11-23 02:21:28,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:28,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:21:28,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:29,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:21:29,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:21:29,034 INFO L87 Difference]: Start difference. First operand has 126 states, 65 states have (on average 1.2) internal successors, (78), 66 states have internal predecessors, (78), 48 states have call successors, (48), 11 states have call predecessors, (48), 11 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) Second operand has 12 states, 7 states have (on average 4.428571428571429) internal successors, (31), 9 states have internal predecessors, (31), 7 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2021-11-23 02:21:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:30,361 INFO L93 Difference]: Finished difference Result 234 states and 340 transitions. [2021-11-23 02:21:30,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:21:30,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 4.428571428571429) internal successors, (31), 9 states have internal predecessors, (31), 7 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 82 [2021-11-23 02:21:30,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:30,376 INFO L225 Difference]: With dead ends: 234 [2021-11-23 02:21:30,376 INFO L226 Difference]: Without dead ends: 124 [2021-11-23 02:21:30,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:21:30,384 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 34 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:30,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1127 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 347 Invalid, 0 Unknown, 64 Unchecked, 1.1s Time] [2021-11-23 02:21:30,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-23 02:21:30,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-11-23 02:21:30,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 64 states have (on average 1.171875) internal successors, (75), 65 states have internal predecessors, (75), 48 states have call successors, (48), 11 states have call predecessors, (48), 11 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-11-23 02:21:30,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 170 transitions. [2021-11-23 02:21:30,457 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 170 transitions. Word has length 82 [2021-11-23 02:21:30,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:30,458 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 170 transitions. [2021-11-23 02:21:30,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 4.428571428571429) internal successors, (31), 9 states have internal predecessors, (31), 7 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2021-11-23 02:21:30,459 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 170 transitions. [2021-11-23 02:21:30,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-23 02:21:30,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:30,466 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 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, 1, 1, 1, 1, 1, 1] [2021-11-23 02:21:30,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:21:30,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-23 02:21:30,694 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:30,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:30,695 INFO L85 PathProgramCache]: Analyzing trace with hash 393458270, now seen corresponding path program 1 times [2021-11-23 02:21:30,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:30,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788726072] [2021-11-23 02:21:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:30,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 02:21:31,542 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:31,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788726072] [2021-11-23 02:21:31,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788726072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:21:31,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:21:31,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:21:31,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739842155] [2021-11-23 02:21:31,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:31,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:21:31,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:31,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:21:31,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:21:31,552 INFO L87 Difference]: Start difference. First operand 124 states and 170 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-23 02:21:32,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:32,047 INFO L93 Difference]: Finished difference Result 217 states and 300 transitions. [2021-11-23 02:21:32,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:21:32,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 90 [2021-11-23 02:21:32,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:32,054 INFO L225 Difference]: With dead ends: 217 [2021-11-23 02:21:32,054 INFO L226 Difference]: Without dead ends: 127 [2021-11-23 02:21:32,056 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:21:32,058 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 4 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:32,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 451 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:21:32,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-23 02:21:32,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-11-23 02:21:32,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 66 states have (on average 1.196969696969697) internal successors, (79), 68 states have internal predecessors, (79), 48 states have call successors, (48), 11 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2021-11-23 02:21:32,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 175 transitions. [2021-11-23 02:21:32,118 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 175 transitions. Word has length 90 [2021-11-23 02:21:32,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:32,119 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 175 transitions. [2021-11-23 02:21:32,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-23 02:21:32,120 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 175 transitions. [2021-11-23 02:21:32,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-23 02:21:32,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:32,125 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:21:32,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:21:32,126 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:32,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:32,127 INFO L85 PathProgramCache]: Analyzing trace with hash 231810663, now seen corresponding path program 1 times [2021-11-23 02:21:32,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:32,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002156187] [2021-11-23 02:21:32,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:32,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 02:21:33,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:33,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002156187] [2021-11-23 02:21:33,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002156187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:21:33,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631825341] [2021-11-23 02:21:33,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:33,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:21:33,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:21:33,030 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:21:33,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:21:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:33,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 2716 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:21:33,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:21:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-23 02:21:33,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:21:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 02:21:34,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631825341] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:21:34,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:21:34,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2021-11-23 02:21:34,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732425872] [2021-11-23 02:21:34,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:21:34,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:21:34,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:21:34,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:21:34,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:21:34,139 INFO L87 Difference]: Start difference. First operand 127 states and 175 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-23 02:21:34,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:21:34,644 INFO L93 Difference]: Finished difference Result 226 states and 317 transitions. [2021-11-23 02:21:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:21:34,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 91 [2021-11-23 02:21:34,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:21:34,648 INFO L225 Difference]: With dead ends: 226 [2021-11-23 02:21:34,649 INFO L226 Difference]: Without dead ends: 132 [2021-11-23 02:21:34,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:21:34,651 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 4 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:21:34,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 301 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:21:34,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-23 02:21:34,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2021-11-23 02:21:34,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 70 states have internal predecessors, (82), 48 states have call successors, (48), 12 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2021-11-23 02:21:34,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 178 transitions. [2021-11-23 02:21:34,685 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 178 transitions. Word has length 91 [2021-11-23 02:21:34,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:21:34,685 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 178 transitions. [2021-11-23 02:21:34,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-23 02:21:34,686 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 178 transitions. [2021-11-23 02:21:34,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 02:21:34,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:21:34,692 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:21:34,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:21:34,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:21:34,918 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:21:34,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:21:34,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1064019776, now seen corresponding path program 1 times [2021-11-23 02:21:34,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:21:34,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063349749] [2021-11-23 02:21:34,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:34,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:21:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-23 02:21:35,408 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:21:35,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063349749] [2021-11-23 02:21:35,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063349749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:21:35,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943847960] [2021-11-23 02:21:35,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:21:35,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:21:35,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:21:35,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:21:35,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eee4b8b7-43fc-484c-90ff-a678f0f93e25/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:21:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:21:35,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 2727 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-23 02:21:35,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:21:36,262 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 [2021-11-23 02:21:38,778 INFO L388 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 35 treesize of output 27 [2021-11-23 02:21:38,782 INFO L388 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 24 treesize of output 16 [2021-11-23 02:21:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 02:21:38,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:21:40,771 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 13430 disjunctions. This might take some time... [2021-11-23 02:21:52,704 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.