./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_insert_after_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_insert_after_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/bin/utaipan-ByfvJB40ur --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 811b19098d8792ad6e5000a82cea527dd92a4bca0da5ce1bf33c0114316cf54d --- 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-38b53e6 [2022-11-26 00:16:50,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:16:50,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:16:50,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:16:50,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:16:50,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:16:50,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:16:50,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:16:50,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:16:50,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:16:50,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:16:50,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:16:50,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:16:50,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:16:50,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:16:50,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:16:50,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:16:50,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:16:50,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:16:50,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:16:50,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:16:50,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:16:50,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:16:50,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:16:50,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:16:50,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:16:50,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:16:50,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:16:50,536 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:16:50,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:16:50,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:16:50,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:16:50,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:16:50,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:16:50,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:16:50,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:16:50,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:16:50,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:16:50,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:16:50,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:16:50,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:16:50,546 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-26 00:16:50,574 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:16:50,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:16:50,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:16:50,575 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:16:50,575 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:16:50,576 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:16:50,576 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:16:50,576 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:16:50,576 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:16:50,576 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:16:50,577 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:16:50,577 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:16:50,577 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:16:50,577 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:16:50,581 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:16:50,581 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:16:50,582 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:16:50,582 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:16:50,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:16:50,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:16:50,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:16:50,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:16:50,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:16:50,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:16:50,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:16:50,584 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:16:50,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:16:50,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:16:50,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:16:50,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:16:50,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:16:50,585 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:16:50,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:16:50,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:16:50,586 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:16:50,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:16:50,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:16:50,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:16:50,586 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_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 811b19098d8792ad6e5000a82cea527dd92a4bca0da5ce1bf33c0114316cf54d [2022-11-26 00:16:50,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:16:50,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:16:50,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:16:50,937 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:16:50,938 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:16:50,939 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/aws-c-common/aws_linked_list_insert_after_harness.i [2022-11-26 00:16:54,089 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:16:54,604 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:16:54,605 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/sv-benchmarks/c/aws-c-common/aws_linked_list_insert_after_harness.i [2022-11-26 00:16:54,643 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/bin/utaipan-ByfvJB40ur/data/f58c4f732/1d6e6fd8e1b24d1f833414af50e657cd/FLAG21352994b [2022-11-26 00:16:54,661 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/bin/utaipan-ByfvJB40ur/data/f58c4f732/1d6e6fd8e1b24d1f833414af50e657cd [2022-11-26 00:16:54,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:16:54,669 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:16:54,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:16:54,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:16:54,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:16:54,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:16:54" (1/1) ... [2022-11-26 00:16:54,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19505ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:54, skipping insertion in model container [2022-11-26 00:16:54,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:16:54" (1/1) ... [2022-11-26 00:16:54,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:16:54,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:16:55,053 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_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/sv-benchmarks/c/aws-c-common/aws_linked_list_insert_after_harness.i[4502,4515] [2022-11-26 00:16:55,063 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_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/sv-benchmarks/c/aws-c-common/aws_linked_list_insert_after_harness.i[4562,4575] [2022-11-26 00:16:56,058 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,059 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,059 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,060 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,061 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,076 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,076 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,079 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,079 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,082 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,083 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,084 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,084 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,152 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:16:56,153 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:16:56,154 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:16:56,159 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-26 00:16:56,162 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-26 00:16:56,162 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-26 00:16:56,492 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-26 00:16:56,496 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-26 00:16:56,499 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-26 00:16:56,503 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-26 00:16:56,504 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-26 00:16:56,507 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-26 00:16:56,510 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-26 00:16:56,511 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-26 00:16:56,511 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-26 00:16:56,512 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-26 00:16:56,514 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-26 00:16:56,711 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-26 00:16:56,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:16:56,775 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:16:56,803 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_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/sv-benchmarks/c/aws-c-common/aws_linked_list_insert_after_harness.i[4502,4515] [2022-11-26 00:16:56,803 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_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/sv-benchmarks/c/aws-c-common/aws_linked_list_insert_after_harness.i[4562,4575] [2022-11-26 00:16:56,867 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,867 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,868 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,868 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,869 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,877 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,877 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,879 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,879 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,881 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,881 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,882 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,882 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:16:56,890 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:16:56,891 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:16:56,892 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:16:56,896 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-26 00:16:56,897 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-26 00:16:56,898 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-26 00:16:56,932 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-26 00:16:56,933 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-26 00:16:56,934 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-26 00:16:56,935 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-26 00:16:56,936 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-26 00:16:56,942 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-26 00:16:56,943 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-26 00:16:56,944 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-26 00:16:56,945 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-26 00:16:56,945 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-26 00:16:56,946 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-26 00:16:56,976 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-26 00:16:57,008 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:16:57,234 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:16:57,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:57 WrapperNode [2022-11-26 00:16:57,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:16:57,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:16:57,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:16:57,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:16:57,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:57" (1/1) ... [2022-11-26 00:16:57,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:57" (1/1) ... [2022-11-26 00:16:57,345 INFO L138 Inliner]: procedures = 679, calls = 1047, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 77 [2022-11-26 00:16:57,345 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:16:57,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:16:57,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:16:57,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:16:57,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:57" (1/1) ... [2022-11-26 00:16:57,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:57" (1/1) ... [2022-11-26 00:16:57,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:57" (1/1) ... [2022-11-26 00:16:57,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:57" (1/1) ... [2022-11-26 00:16:57,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:57" (1/1) ... [2022-11-26 00:16:57,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:57" (1/1) ... [2022-11-26 00:16:57,377 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:57" (1/1) ... [2022-11-26 00:16:57,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:57" (1/1) ... [2022-11-26 00:16:57,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:16:57,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:16:57,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:16:57,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:16:57,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:57" (1/1) ... [2022-11-26 00:16:57,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:16:57,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:16:57,427 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:16:57,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:16:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:16:57,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:16:57,473 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:16:57,473 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-26 00:16:57,473 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-26 00:16:57,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:16:57,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 00:16:57,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:16:57,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:16:57,474 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:16:57,474 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:16:57,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:16:57,475 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 00:16:57,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-26 00:16:57,475 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-11-26 00:16:57,475 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-11-26 00:16:57,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:16:57,792 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:16:57,795 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:16:58,053 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:16:58,193 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:16:58,194 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-26 00:16:58,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:16:58 BoogieIcfgContainer [2022-11-26 00:16:58,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:16:58,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:16:58,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:16:58,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:16:58,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:16:54" (1/3) ... [2022-11-26 00:16:58,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@774cb59b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:16:58, skipping insertion in model container [2022-11-26 00:16:58,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:57" (2/3) ... [2022-11-26 00:16:58,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@774cb59b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:16:58, skipping insertion in model container [2022-11-26 00:16:58,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:16:58" (3/3) ... [2022-11-26 00:16:58,206 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_insert_after_harness.i [2022-11-26 00:16:58,226 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:16:58,226 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:16:58,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:16:58,307 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;@5bacad6a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:16:58,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:16:58,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-26 00:16:58,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:16:58,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:58,322 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:16:58,322 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:16:58,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:58,331 INFO L85 PathProgramCache]: Analyzing trace with hash -144968383, now seen corresponding path program 1 times [2022-11-26 00:16:58,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:58,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390190493] [2022-11-26 00:16:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:58,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:17:07,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:07,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390190493] [2022-11-26 00:17:07,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390190493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:17:07,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:17:07,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 00:17:07,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992702364] [2022-11-26 00:17:07,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:17:07,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:17:07,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:07,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:17:07,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:17:07,108 INFO L87 Difference]: Start difference. First operand has 46 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 8 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:17:07,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:07,717 INFO L93 Difference]: Finished difference Result 86 states and 124 transitions. [2022-11-26 00:17:07,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:17:07,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2022-11-26 00:17:07,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:07,728 INFO L225 Difference]: With dead ends: 86 [2022-11-26 00:17:07,729 INFO L226 Difference]: Without dead ends: 48 [2022-11-26 00:17:07,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:17:07,736 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:07,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 170 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:17:07,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-26 00:17:07,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-26 00:17:07,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 20 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-26 00:17:07,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2022-11-26 00:17:07,787 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 19 [2022-11-26 00:17:07,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:07,788 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2022-11-26 00:17:07,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:17:07,788 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2022-11-26 00:17:07,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:17:07,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:07,790 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:07,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:17:07,791 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:07,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:07,792 INFO L85 PathProgramCache]: Analyzing trace with hash 728698747, now seen corresponding path program 1 times [2022-11-26 00:17:07,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:07,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232367141] [2022-11-26 00:17:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:07,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:17:10,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:10,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232367141] [2022-11-26 00:17:10,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232367141] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:17:10,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573378742] [2022-11-26 00:17:10,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:10,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:10,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:10,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:10,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4a362e8-d3c0-418d-be9d-fddb5adaafe8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:17:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:11,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-26 00:17:11,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:11,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-26 00:17:11,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2022-11-26 00:17:11,382 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 00:17:11,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 52 [2022-11-26 00:17:11,413 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:17:11,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-26 00:17:11,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:17:11,483 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-26 00:17:11,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2022-11-26 00:17:12,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,637 INFO L321 Elim1Store]: treesize reduction 39, result has 11.4 percent of original size [2022-11-26 00:17:12,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 306 treesize of output 236 [2022-11-26 00:17:12,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 204 [2022-11-26 00:17:12,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 203 [2022-11-26 00:17:12,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 158 [2022-11-26 00:17:12,802 INFO L321 Elim1Store]: treesize reduction 142, result has 12.9 percent of original size [2022-11-26 00:17:12,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 197 treesize of output 237 [2022-11-26 00:17:12,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 168 [2022-11-26 00:17:12,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 17 [2022-11-26 00:17:12,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 145 [2022-11-26 00:17:12,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 76 [2022-11-26 00:17:13,955 INFO L321 Elim1Store]: treesize reduction 569, result has 9.3 percent of original size [2022-11-26 00:17:13,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 140030452 treesize of output 111547391