./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 2329fc70 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_62b6c1a3-49c6-44ed-afac-32114375d891/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b6c1a3-49c6-44ed-afac-32114375d891/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b6c1a3-49c6-44ed-afac-32114375d891/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b6c1a3-49c6-44ed-afac-32114375d891/bin/utaipan-gh47qXpMRh/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_62b6c1a3-49c6-44ed-afac-32114375d891/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b6c1a3-49c6-44ed-afac-32114375d891/bin/utaipan-gh47qXpMRh --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-2329fc7 [2022-12-14 12:22:44,847 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:22:44,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:22:44,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:22:44,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:22:44,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:22:44,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:22:44,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:22:44,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:22:44,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:22:44,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:22:44,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:22:44,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:22:44,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:22:44,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:22:44,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:22:44,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:22:44,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:22:44,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:22:44,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:22:44,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:22:44,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:22:44,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:22:44,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:22:44,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:22:44,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:22:44,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:22:44,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:22:44,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:22:44,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:22:44,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:22:44,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:22:44,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:22:44,879 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:22:44,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:22:44,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:22:44,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:22:44,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:22:44,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:22:44,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:22:44,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:22:44,882 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b6c1a3-49c6-44ed-afac-32114375d891/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 12:22:44,896 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:22:44,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:22:44,896 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:22:44,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:22:44,900 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:22:44,901 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:22:44,901 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:22:44,901 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:22:44,901 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:22:44,902 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:22:44,902 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:22:44,902 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:22:44,902 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:22:44,902 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:22:44,902 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:22:44,903 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:22:44,903 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:22:44,903 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:22:44,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:22:44,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:22:44,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:22:44,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:22:44,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:22:44,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:22:44,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:22:44,905 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:22:44,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:22:44,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:22:44,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:22:44,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:22:44,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:22:44,906 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:22:44,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:22:44,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:22:44,907 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:22:44,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:22:44,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:22:44,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:22:44,908 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_62b6c1a3-49c6-44ed-afac-32114375d891/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b6c1a3-49c6-44ed-afac-32114375d891/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69a4e17497471d2fff231bad199d28dc26e616d1fdaf7fc57a8b45b8dfdd40ce [2022-12-14 12:22:45,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:22:45,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:22:45,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:22:45,100 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:22:45,100 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:22:45,101 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b6c1a3-49c6-44ed-afac-32114375d891/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i [2022-12-14 12:22:47,765 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:22:48,138 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:22:48,138 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b6c1a3-49c6-44ed-afac-32114375d891/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i [2022-12-14 12:22:48,165 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b6c1a3-49c6-44ed-afac-32114375d891/bin/utaipan-gh47qXpMRh/data/2ffd924e6/4067b4cdb3b647b69f7eb4a6ac56428a/FLAG1bd57b766 [2022-12-14 12:22:48,175 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b6c1a3-49c6-44ed-afac-32114375d891/bin/utaipan-gh47qXpMRh/data/2ffd924e6/4067b4cdb3b647b69f7eb4a6ac56428a [2022-12-14 12:22:48,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:22:48,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:22:48,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:22:48,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:22:48,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:22:48,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:22:48" (1/1) ... [2022-12-14 12:22:48,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@585c93f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:48, skipping insertion in model container [2022-12-14 12:22:48,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:22:48" (1/1) ... [2022-12-14 12:22:48,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:22:48,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:22:48,441 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_62b6c1a3-49c6-44ed-afac-32114375d891/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4496,4509] [2022-12-14 12:22:48,447 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_62b6c1a3-49c6-44ed-afac-32114375d891/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4556,4569] [2022-12-14 12:22:49,132 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,132 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,133 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,133 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,134 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,152 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,153 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,154 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,155 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,233 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 12:22:49,233 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 12:22:49,234 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 12:22:49,238 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 12:22:49,240 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 12:22:49,240 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 12:22:49,490 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 12:22:49,491 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 12:22:49,492 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 12:22:49,493 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 12:22:49,493 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 12:22:49,494 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 12:22:49,495 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 12:22:49,495 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 12:22:49,496 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 12:22:49,496 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 12:22:49,497 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 12:22:49,629 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 12:22:49,657 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-12-14 12:22:49,665 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 12:22:49,686 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 12:22:49,692 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,693 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,736 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 12:22:49,744 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 12:22:49,745 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 12:22:49,749 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 12:22:49,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:22:49,786 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:22:49,795 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_62b6c1a3-49c6-44ed-afac-32114375d891/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4496,4509] [2022-12-14 12:22:49,796 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_62b6c1a3-49c6-44ed-afac-32114375d891/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4556,4569] [2022-12-14 12:22:49,818 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,818 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,819 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,819 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,819 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,823 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,824 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,824 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,825 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,829 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 12:22:49,829 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 12:22:49,829 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 12:22:49,831 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 12:22:49,832 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 12:22:49,833 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 12:22:49,845 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 12:22:49,846 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 12:22:49,847 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 12:22:49,847 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 12:22:49,848 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 12:22:49,848 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 12:22:49,849 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 12:22:49,849 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 12:22:49,849 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 12:22:49,850 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 12:22:49,850 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 12:22:49,863 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 12:22:49,877 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-12-14 12:22:49,881 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 12:22:49,904 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 12:22:49,910 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,910 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 12:22:49,927 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 12:22:49,930 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 12:22:49,930 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 12:22:49,933 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 12:22:49,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:22:50,077 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:22:50,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:50 WrapperNode [2022-12-14 12:22:50,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:22:50,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:22:50,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:22:50,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:22:50,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:50" (1/1) ... [2022-12-14 12:22:50,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:50" (1/1) ... [2022-12-14 12:22:50,179 INFO L138 Inliner]: procedures = 693, calls = 2791, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 873 [2022-12-14 12:22:50,180 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:22:50,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:22:50,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:22:50,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:22:50,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:50" (1/1) ... [2022-12-14 12:22:50,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:50" (1/1) ... [2022-12-14 12:22:50,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:50" (1/1) ... [2022-12-14 12:22:50,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:50" (1/1) ... [2022-12-14 12:22:50,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:50" (1/1) ... [2022-12-14 12:22:50,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:50" (1/1) ... [2022-12-14 12:22:50,220 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:50" (1/1) ... [2022-12-14 12:22:50,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:50" (1/1) ... [2022-12-14 12:22:50,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:22:50,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:22:50,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:22:50,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:22:50,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:50" (1/1) ... [2022-12-14 12:22:50,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:22:50,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b6c1a3-49c6-44ed-afac-32114375d891/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:22:50,253 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b6c1a3-49c6-44ed-afac-32114375d891/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:22:50,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b6c1a3-49c6-44ed-afac-32114375d891/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:22:50,288 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2022-12-14 12:22:50,288 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2022-12-14 12:22:50,288 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-12-14 12:22:50,288 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-12-14 12:22:50,288 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2022-12-14 12:22:50,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2022-12-14 12:22:50,288 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-12-14 12:22:50,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:22:50,289 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-12-14 12:22:50,289 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-12-14 12:22:50,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 12:22:50,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 12:22:50,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 12:22:50,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 12:22:50,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:22:50,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 12:22:50,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:22:50,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:22:50,290 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-12-14 12:22:50,290 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-12-14 12:22:50,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-12-14 12:22:50,290 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 12:22:50,290 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 12:22:50,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 12:22:50,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 12:22:50,290 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2022-12-14 12:22:50,290 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2022-12-14 12:22:50,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 12:22:50,291 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-12-14 12:22:50,291 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-12-14 12:22:50,291 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-12-14 12:22:50,291 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-12-14 12:22:50,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 12:22:50,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:22:50,461 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:22:50,463 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:22:51,233 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:22:51,366 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:22:51,366 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 12:22:51,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:22:51 BoogieIcfgContainer [2022-12-14 12:22:51,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:22:51,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:22:51,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:22:51,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:22:51,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:22:48" (1/3) ... [2022-12-14 12:22:51,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6897561a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:22:51, skipping insertion in model container [2022-12-14 12:22:51,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:22:50" (2/3) ... [2022-12-14 12:22:51,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6897561a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:22:51, skipping insertion in model container [2022-12-14 12:22:51,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:22:51" (3/3) ... [2022-12-14 12:22:51,374 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_eq_byte_buf_harness.i [2022-12-14 12:22:51,387 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:22:51,388 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:22:51,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:22:51,428 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;@4942991b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:22:51,428 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:22:51,432 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) [2022-12-14 12:22:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 12:22:51,439 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:51,440 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] [2022-12-14 12:22:51,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:22:51,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:51,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1408255076, now seen corresponding path program 1 times [2022-12-14 12:22:51,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:22:51,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225647486] [2022-12-14 12:22:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:51,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:22:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 12:22:52,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:22:52,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225647486] [2022-12-14 12:22:52,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225647486] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:22:52,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:22:52,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:22:52,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788200999] [2022-12-14 12:22:52,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:22:52,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:22:52,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:22:52,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:22:52,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:22:52,142 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) [2022-12-14 12:22:52,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:22:52,290 INFO L93 Difference]: Finished difference Result 161 states and 221 transitions. [2022-12-14 12:22:52,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:22:52,293 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 [2022-12-14 12:22:52,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:22:52,302 INFO L225 Difference]: With dead ends: 161 [2022-12-14 12:22:52,302 INFO L226 Difference]: Without dead ends: 125 [2022-12-14 12:22:52,305 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 [2022-12-14 12:22:52,308 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, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:22:52,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 347 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:22:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-14 12:22:52,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-12-14 12:22:52,356 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) [2022-12-14 12:22:52,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 169 transitions. [2022-12-14 12:22:52,360 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 169 transitions. Word has length 51 [2022-12-14 12:22:52,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:22:52,361 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 169 transitions. [2022-12-14 12:22:52,361 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) [2022-12-14 12:22:52,361 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 169 transitions. [2022-12-14 12:22:52,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 12:22:52,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:52,364 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] [2022-12-14 12:22:52,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:22:52,365 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:22:52,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:52,365 INFO L85 PathProgramCache]: Analyzing trace with hash 868045347, now seen corresponding path program 1 times [2022-12-14 12:22:52,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:22:52,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431949905] [2022-12-14 12:22:52,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:52,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:22:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 12:22:58,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:22:58,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431949905] [2022-12-14 12:22:58,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431949905] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:22:58,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603619180] [2022-12-14 12:22:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:58,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:22:58,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b6c1a3-49c6-44ed-afac-32114375d891/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:22:58,146 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b6c1a3-49c6-44ed-afac-32114375d891/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:22:58,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62b6c1a3-49c6-44ed-afac-32114375d891/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:22:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:22:58,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 2543 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-14 12:22:58,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:22:58,801 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 [2022-12-14 12:23:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 12:23:03,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:23:05,704 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2022-12-14 12:29:43,020 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.