./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 69a4e17497471d2fff231bad199d28dc26e616d1fdaf7fc57a8b45b8dfdd40ce --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:29:28,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:29:28,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:29:28,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:29:28,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:29:28,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:29:28,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:29:28,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:29:29,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:29:29,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:29:29,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:29:29,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:29:29,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:29:29,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:29:29,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:29:29,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:29:29,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:29:29,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:29:29,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:29:29,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:29:29,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:29:29,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:29:29,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:29:29,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:29:29,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:29:29,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:29:29,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:29:29,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:29:29,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:29:29,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:29:29,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:29:29,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:29:29,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:29:29,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:29:29,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:29:29,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:29:29,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:29:29,054 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:29:29,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:29:29,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:29:29,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:29:29,060 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-22 01:29:29,092 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:29:29,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:29:29,093 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:29:29,093 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:29:29,094 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:29:29,094 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:29:29,094 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:29:29,095 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:29:29,095 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:29:29,095 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:29:29,096 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:29:29,096 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:29:29,097 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:29:29,097 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:29:29,097 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:29:29,097 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:29:29,098 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:29:29,098 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:29:29,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:29:29,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:29:29,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:29:29,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:29:29,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:29:29,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:29:29,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:29:29,100 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:29:29,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:29:29,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:29:29,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:29:29,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:29:29,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:29:29,102 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:29:29,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:29:29,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:29:29,102 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:29:29,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:29:29,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:29:29,103 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:29:29,103 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69a4e17497471d2fff231bad199d28dc26e616d1fdaf7fc57a8b45b8dfdd40ce [2022-11-22 01:29:29,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:29:29,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:29:29,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:29:29,469 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:29:29,470 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:29:29,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i [2022-11-22 01:29:32,536 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:29:33,138 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:29:33,139 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i [2022-11-22 01:29:33,195 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/bin/utaipan-g80aRyZoba/data/f4f4d1fc4/a19ad4e6431e4de68542c102dc62a7b4/FLAG8973b1fe3 [2022-11-22 01:29:33,215 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/bin/utaipan-g80aRyZoba/data/f4f4d1fc4/a19ad4e6431e4de68542c102dc62a7b4 [2022-11-22 01:29:33,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:29:33,222 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:29:33,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:29:33,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:29:33,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:29:33,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:29:33" (1/1) ... [2022-11-22 01:29:33,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3df62098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:33, skipping insertion in model container [2022-11-22 01:29:33,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:29:33" (1/1) ... [2022-11-22 01:29:33,243 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:29:33,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:29:33,680 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4496,4509] [2022-11-22 01:29:33,692 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4556,4569] [2022-11-22 01:29:34,981 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:34,982 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:34,983 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:34,984 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:34,985 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:35,001 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:35,002 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:35,004 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:35,005 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:35,649 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-22 01:29:35,651 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-22 01:29:35,653 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-22 01:29:35,654 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-22 01:29:35,656 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-22 01:29:35,657 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-22 01:29:35,658 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-22 01:29:35,659 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-22 01:29:35,660 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-22 01:29:35,660 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-22 01:29:35,922 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-22 01:29:36,105 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:36,112 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:36,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:29:36,307 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:29:36,321 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4496,4509] [2022-11-22 01:29:36,322 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4556,4569] [2022-11-22 01:29:36,358 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:36,358 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:36,359 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:36,359 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:36,360 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:36,366 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:36,367 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:36,368 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:36,368 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:36,402 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-22 01:29:36,403 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-22 01:29:36,404 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-22 01:29:36,404 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-22 01:29:36,405 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-22 01:29:36,406 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-22 01:29:36,406 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-22 01:29:36,407 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-22 01:29:36,407 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-22 01:29:36,408 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-22 01:29:36,429 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-22 01:29:36,487 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:36,488 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:29:36,563 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:29:36,854 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:29:36,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:36 WrapperNode [2022-11-22 01:29:36,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:29:36,856 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:29:36,856 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:29:36,856 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:29:36,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:36" (1/1) ... [2022-11-22 01:29:36,993 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:36" (1/1) ... [2022-11-22 01:29:37,128 INFO L138 Inliner]: procedures = 693, calls = 2791, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 873 [2022-11-22 01:29:37,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:29:37,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:29:37,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:29:37,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:29:37,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:36" (1/1) ... [2022-11-22 01:29:37,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:36" (1/1) ... [2022-11-22 01:29:37,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:36" (1/1) ... [2022-11-22 01:29:37,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:36" (1/1) ... [2022-11-22 01:29:37,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:36" (1/1) ... [2022-11-22 01:29:37,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:36" (1/1) ... [2022-11-22 01:29:37,243 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:36" (1/1) ... [2022-11-22 01:29:37,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:36" (1/1) ... [2022-11-22 01:29:37,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:29:37,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:29:37,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:29:37,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:29:37,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:36" (1/1) ... [2022-11-22 01:29:37,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:29:37,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:29:37,314 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:29:37,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:29:37,364 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2022-11-22 01:29:37,364 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2022-11-22 01:29:37,365 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-22 01:29:37,365 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-22 01:29:37,366 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2022-11-22 01:29:37,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2022-11-22 01:29:37,367 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-22 01:29:37,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:29:37,367 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-22 01:29:37,367 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-22 01:29:37,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:29:37,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 01:29:37,369 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 01:29:37,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:29:37,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:29:37,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 01:29:37,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:29:37,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:29:37,370 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-22 01:29:37,370 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-22 01:29:37,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-22 01:29:37,370 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 01:29:37,371 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 01:29:37,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:29:37,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 01:29:37,371 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2022-11-22 01:29:37,371 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2022-11-22 01:29:37,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 01:29:37,372 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-22 01:29:37,372 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-22 01:29:37,372 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-22 01:29:37,372 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-22 01:29:37,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:29:37,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:29:37,740 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:29:37,743 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:29:39,453 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:29:39,805 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:29:39,805 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 01:29:39,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:29:39 BoogieIcfgContainer [2022-11-22 01:29:39,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:29:39,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:29:39,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:29:39,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:29:39,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:29:33" (1/3) ... [2022-11-22 01:29:39,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a37335f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:29:39, skipping insertion in model container [2022-11-22 01:29:39,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:29:36" (2/3) ... [2022-11-22 01:29:39,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a37335f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:29:39, skipping insertion in model container [2022-11-22 01:29:39,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:29:39" (3/3) ... [2022-11-22 01:29:39,826 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_eq_byte_buf_harness.i [2022-11-22 01:29:39,850 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:29:39,850 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:29:39,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:29:39,936 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2aa463b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:29:39,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:29:39,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 52 states have internal predecessors, (62), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-22 01:29:39,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 01:29:39,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:39,958 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:29:39,959 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:29:39,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:39,969 INFO L85 PathProgramCache]: Analyzing trace with hash 2113904576, now seen corresponding path program 1 times [2022-11-22 01:29:39,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:39,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943616483] [2022-11-22 01:29:39,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:39,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 01:29:41,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:41,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943616483] [2022-11-22 01:29:41,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943616483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:29:41,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:29:41,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:29:41,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107894072] [2022-11-22 01:29:41,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:29:41,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:29:41,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:29:41,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:29:41,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:29:41,479 INFO L87 Difference]: Start difference. First operand has 94 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 52 states have internal predecessors, (62), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 01:29:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:41,717 INFO L93 Difference]: Finished difference Result 161 states and 221 transitions. [2022-11-22 01:29:41,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:29:41,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 51 [2022-11-22 01:29:41,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:41,732 INFO L225 Difference]: With dead ends: 161 [2022-11-22 01:29:41,732 INFO L226 Difference]: Without dead ends: 125 [2022-11-22 01:29:41,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:29:41,744 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 12 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:41,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 347 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:29:41,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-22 01:29:41,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-11-22 01:29:41,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 70 states have internal predecessors, (84), 43 states have call successors, (43), 10 states have call predecessors, (43), 10 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-22 01:29:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 169 transitions. [2022-11-22 01:29:41,824 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 169 transitions. Word has length 51 [2022-11-22 01:29:41,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:41,824 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 169 transitions. [2022-11-22 01:29:41,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-22 01:29:41,824 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 169 transitions. [2022-11-22 01:29:41,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-22 01:29:41,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:41,827 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:29:41,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:29:41,827 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:29:41,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:41,828 INFO L85 PathProgramCache]: Analyzing trace with hash -819770497, now seen corresponding path program 1 times [2022-11-22 01:29:41,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:29:41,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308007938] [2022-11-22 01:29:41,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:41,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:29:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 01:29:56,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:29:56,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308007938] [2022-11-22 01:29:56,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308007938] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:29:56,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106827132] [2022-11-22 01:29:56,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:29:56,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:29:56,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:29:56,234 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:29:56,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_baa5e83d-e3e1-448f-b6c8-78e5f8a3ab4c/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:29:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:29:56,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 2543 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-22 01:29:56,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:29:57,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 01:30:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:30:06,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:30:10,073 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2022-11-22 01:38:56,974 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.