./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 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/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_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/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_87064464-e413-4d1f-a776-a9597d0a7820/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_87064464-e413-4d1f-a776-a9597d0a7820/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 065f95e1f01b1c2bb5cc332c26e118823e72d0e75cb3966f20aacf6dc1740b4a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:25:13,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:25:13,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:25:13,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:25:13,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:25:13,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:25:13,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:25:13,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:25:13,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:25:14,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:25:14,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:25:14,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:25:14,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:25:14,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:25:14,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:25:14,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:25:14,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:25:14,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:25:14,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:25:14,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:25:14,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:25:14,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:25:14,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:25:14,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:25:14,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:25:14,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:25:14,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:25:14,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:25:14,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:25:14,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:25:14,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:25:14,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:25:14,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:25:14,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:25:14,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:25:14,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:25:14,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:25:14,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:25:14,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:25:14,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:25:14,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:25:14,068 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:25:14,097 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:25:14,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:25:14,098 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:25:14,098 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:25:14,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:25:14,099 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:25:14,099 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:25:14,099 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:25:14,100 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:25:14,100 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:25:14,100 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:25:14,100 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:25:14,100 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:25:14,101 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:25:14,101 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:25:14,101 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:25:14,101 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:25:14,101 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:25:14,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:25:14,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:25:14,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:25:14,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:25:14,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:25:14,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:25:14,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:25:14,104 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:25:14,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:25:14,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:25:14,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:25:14,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:25:14,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:25:14,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:25:14,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:25:14,105 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:25:14,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:25:14,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:25:14,106 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:25:14,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:25:14,106 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_87064464-e413-4d1f-a776-a9597d0a7820/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 065f95e1f01b1c2bb5cc332c26e118823e72d0e75cb3966f20aacf6dc1740b4a [2021-11-21 01:25:14,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:25:14,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:25:14,419 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:25:14,420 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:25:14,421 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:25:14,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i [2021-11-21 01:25:14,492 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/data/2da3b5563/86d97de8eac9405a9fcd6d4f0db65af7/FLAGaada7d58e [2021-11-21 01:25:15,346 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:25:15,346 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i [2021-11-21 01:25:15,386 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/data/2da3b5563/86d97de8eac9405a9fcd6d4f0db65af7/FLAGaada7d58e [2021-11-21 01:25:15,847 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/data/2da3b5563/86d97de8eac9405a9fcd6d4f0db65af7 [2021-11-21 01:25:15,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:25:15,851 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:25:15,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:25:15,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:25:15,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:25:15,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:25:15" (1/1) ... [2021-11-21 01:25:15,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68b46f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:15, skipping insertion in model container [2021-11-21 01:25:15,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:25:15" (1/1) ... [2021-11-21 01:25:15,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:25:16,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:25:16,394 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_87064464-e413-4d1f-a776-a9597d0a7820/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i[4499,4512] [2021-11-21 01:25:16,402 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_87064464-e413-4d1f-a776-a9597d0a7820/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i[4559,4572] [2021-11-21 01:25:17,695 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:17,696 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:17,697 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:17,698 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:17,703 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:17,729 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:17,730 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:17,732 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:17,732 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:18,274 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:25:18,275 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:25:18,276 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:25:18,277 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:25:18,279 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:25:18,279 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:25:18,280 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:25:18,281 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:25:18,281 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:25:18,282 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:25:18,458 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:25:18,545 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:18,546 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:18,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:25:18,726 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:25:18,740 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_87064464-e413-4d1f-a776-a9597d0a7820/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i[4499,4512] [2021-11-21 01:25:18,741 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_87064464-e413-4d1f-a776-a9597d0a7820/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be32_harness.i[4559,4572] [2021-11-21 01:25:18,799 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:18,799 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:18,800 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:18,800 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:18,801 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:18,807 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:18,807 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:18,808 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:18,809 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:18,866 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:25:18,867 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:25:18,867 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:25:18,868 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:25:18,869 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:25:18,870 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:25:18,870 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:25:18,871 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:25:18,872 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:25:18,872 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:25:18,893 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:25:18,948 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:18,949 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:25:18,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:25:19,219 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:25:19,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:19 WrapperNode [2021-11-21 01:25:19,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:25:19,221 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:25:19,221 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:25:19,221 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:25:19,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:19" (1/1) ... [2021-11-21 01:25:19,341 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:19" (1/1) ... [2021-11-21 01:25:19,429 INFO L137 Inliner]: procedures = 691, calls = 2645, calls flagged for inlining = 62, calls inlined = 11, statements flattened = 975 [2021-11-21 01:25:19,430 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:25:19,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:25:19,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:25:19,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:25:19,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:19" (1/1) ... [2021-11-21 01:25:19,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:19" (1/1) ... [2021-11-21 01:25:19,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:19" (1/1) ... [2021-11-21 01:25:19,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:19" (1/1) ... [2021-11-21 01:25:19,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:19" (1/1) ... [2021-11-21 01:25:19,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:19" (1/1) ... [2021-11-21 01:25:19,543 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:19" (1/1) ... [2021-11-21 01:25:19,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:25:19,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:25:19,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:25:19,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:25:19,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:19" (1/1) ... [2021-11-21 01:25:19,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:25:19,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:19,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:25:19,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:25:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_read [2021-11-21 01:25:19,663 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_read [2021-11-21 01:25:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-21 01:25:19,664 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-21 01:25:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure ntohl [2021-11-21 01:25:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:25:19,665 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-21 01:25:19,666 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-21 01:25:19,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2021-11-21 01:25:19,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 01:25:19,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 01:25:19,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:25:19,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-21 01:25:19,667 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-21 01:25:19,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:25:19,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:25:19,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:25:19,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:25:19,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:25:19,667 INFO L130 BoogieDeclarations]: Found specification of procedure aws_ntoh32 [2021-11-21 01:25:19,668 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_ntoh32 [2021-11-21 01:25:19,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:25:19,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:25:19,669 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-21 01:25:19,669 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-21 01:25:19,669 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-21 01:25:19,669 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-21 01:25:19,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 01:25:19,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 01:25:19,670 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-21 01:25:19,670 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-21 01:25:19,671 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:25:19,671 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:25:19,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:25:19,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:25:19,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:25:19,671 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-21 01:25:19,672 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-21 01:25:19,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:25:19,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2021-11-21 01:25:19,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:25:20,060 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:25:20,062 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:25:21,674 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:25:21,883 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:25:21,883 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:25:21,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:25:21 BoogieIcfgContainer [2021-11-21 01:25:21,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:25:21,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:25:21,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:25:21,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:25:21,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:25:15" (1/3) ... [2021-11-21 01:25:21,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@525dc9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:25:21, skipping insertion in model container [2021-11-21 01:25:21,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:25:19" (2/3) ... [2021-11-21 01:25:21,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@525dc9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:25:21, skipping insertion in model container [2021-11-21 01:25:21,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:25:21" (3/3) ... [2021-11-21 01:25:21,910 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_read_be32_harness.i [2021-11-21 01:25:21,917 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:25:21,917 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:25:21,983 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:25:22,001 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 01:25:22,001 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:25:22,026 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) [2021-11-21 01:25:22,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-21 01:25:22,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:22,041 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] [2021-11-21 01:25:22,044 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:22,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:22,054 INFO L85 PathProgramCache]: Analyzing trace with hash -840891144, now seen corresponding path program 1 times [2021-11-21 01:25:22,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:22,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075219976] [2021-11-21 01:25:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:22,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-21 01:25:23,465 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:23,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075219976] [2021-11-21 01:25:23,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075219976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:23,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085672552] [2021-11-21 01:25:23,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:23,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:23,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:23,475 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:23,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:25:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:24,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 2641 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-21 01:25:24,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:24,432 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 [2021-11-21 01:25:24,439 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 [2021-11-21 01:25:26,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:26,194 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:25:26,195 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 [2021-11-21 01:25:26,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:26,203 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 01:25:26,204 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 [2021-11-21 01:25:26,428 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 [2021-11-21 01:25:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-21 01:25:26,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:25:26,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085672552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:26,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:25:26,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 20 [2021-11-21 01:25:26,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091240517] [2021-11-21 01:25:26,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:26,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:25:26,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:26,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:25:26,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:25:26,673 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) [2021-11-21 01:25:27,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:27,916 INFO L93 Difference]: Finished difference Result 234 states and 340 transitions. [2021-11-21 01:25:27,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:25:27,919 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 [2021-11-21 01:25:27,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:27,932 INFO L225 Difference]: With dead ends: 234 [2021-11-21 01:25:27,933 INFO L226 Difference]: Without dead ends: 124 [2021-11-21 01:25:27,943 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 [2021-11-21 01:25:27,950 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 34 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:27,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1127 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 347 Invalid, 0 Unknown, 64 Unchecked, 1.0s Time] [2021-11-21 01:25:27,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-21 01:25:28,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-11-21 01:25:28,035 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) [2021-11-21 01:25:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 170 transitions. [2021-11-21 01:25:28,053 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 170 transitions. Word has length 82 [2021-11-21 01:25:28,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:28,054 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 170 transitions. [2021-11-21 01:25:28,055 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) [2021-11-21 01:25:28,055 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 170 transitions. [2021-11-21 01:25:28,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-21 01:25:28,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:28,063 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] [2021-11-21 01:25:28,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:28,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 01:25:28,279 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:28,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:28,280 INFO L85 PathProgramCache]: Analyzing trace with hash 393458270, now seen corresponding path program 1 times [2021-11-21 01:25:28,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:28,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633099963] [2021-11-21 01:25:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:28,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-21 01:25:29,142 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:29,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633099963] [2021-11-21 01:25:29,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633099963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:29,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:25:29,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:25:29,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914612850] [2021-11-21 01:25:29,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:29,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:25:29,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:29,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:25:29,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:25:29,146 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) [2021-11-21 01:25:29,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:29,656 INFO L93 Difference]: Finished difference Result 217 states and 300 transitions. [2021-11-21 01:25:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:25:29,657 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 [2021-11-21 01:25:29,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:29,661 INFO L225 Difference]: With dead ends: 217 [2021-11-21 01:25:29,661 INFO L226 Difference]: Without dead ends: 127 [2021-11-21 01:25:29,662 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 [2021-11-21 01:25:29,663 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 [2021-11-21 01:25:29,664 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] [2021-11-21 01:25:29,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-21 01:25:29,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-11-21 01:25:29,681 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) [2021-11-21 01:25:29,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 175 transitions. [2021-11-21 01:25:29,683 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 175 transitions. Word has length 90 [2021-11-21 01:25:29,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:29,684 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 175 transitions. [2021-11-21 01:25:29,684 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) [2021-11-21 01:25:29,684 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 175 transitions. [2021-11-21 01:25:29,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-21 01:25:29,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:29,687 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] [2021-11-21 01:25:29,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:25:29,687 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:29,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:29,688 INFO L85 PathProgramCache]: Analyzing trace with hash 231810663, now seen corresponding path program 1 times [2021-11-21 01:25:29,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:29,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446454629] [2021-11-21 01:25:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:29,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-21 01:25:30,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:30,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446454629] [2021-11-21 01:25:30,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446454629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:30,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185123569] [2021-11-21 01:25:30,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:30,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:30,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:30,488 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:30,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:25:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:31,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 2716 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:25:31,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-21 01:25:31,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:25:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-21 01:25:31,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185123569] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:31,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:25:31,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2021-11-21 01:25:31,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452397428] [2021-11-21 01:25:31,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:31,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:25:31,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:31,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:25:31,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:25:31,518 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) [2021-11-21 01:25:32,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:32,070 INFO L93 Difference]: Finished difference Result 226 states and 317 transitions. [2021-11-21 01:25:32,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:25:32,072 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 [2021-11-21 01:25:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:32,075 INFO L225 Difference]: With dead ends: 226 [2021-11-21 01:25:32,075 INFO L226 Difference]: Without dead ends: 132 [2021-11-21 01:25:32,076 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 [2021-11-21 01:25:32,077 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 [2021-11-21 01:25:32,078 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] [2021-11-21 01:25:32,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-21 01:25:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2021-11-21 01:25:32,117 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) [2021-11-21 01:25:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 178 transitions. [2021-11-21 01:25:32,122 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 178 transitions. Word has length 91 [2021-11-21 01:25:32,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:32,123 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 178 transitions. [2021-11-21 01:25:32,123 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) [2021-11-21 01:25:32,123 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 178 transitions. [2021-11-21 01:25:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-21 01:25:32,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:32,125 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, 1] [2021-11-21 01:25:32,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:32,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:32,343 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:32,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:32,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1064019776, now seen corresponding path program 1 times [2021-11-21 01:25:32,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:32,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140473735] [2021-11-21 01:25:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:32,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-21 01:25:32,770 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:32,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140473735] [2021-11-21 01:25:32,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140473735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:32,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239978680] [2021-11-21 01:25:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:32,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:32,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:32,775 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:32,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87064464-e413-4d1f-a776-a9597d0a7820/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:25:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:33,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 2727 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-21 01:25:33,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:33,746 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 01:25:36,426 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 [2021-11-21 01:25:36,431 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 [2021-11-21 01:25:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 01:25:36,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:25:38,475 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 13430 disjunctions. This might take some time... [2021-11-21 01:26:01,168 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.