./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_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_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/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_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/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_17bbb6ef-71a2-4976-a885-fe7184c52065/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 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 --- 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 [2022-11-25 23:45:40,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:45:40,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:45:40,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:45:40,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:45:40,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:45:40,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:45:40,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:45:40,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:45:40,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:45:40,390 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:45:40,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:45:40,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:45:40,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:45:40,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:45:40,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:45:40,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:45:40,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:45:40,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:45:40,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:45:40,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:45:40,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:45:40,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:45:40,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:45:40,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:45:40,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:45:40,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:45:40,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:45:40,440 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:45:40,441 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:45:40,441 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:45:40,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:45:40,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:45:40,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:45:40,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:45:40,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:45:40,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:45:40,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:45:40,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:45:40,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:45:40,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:45:40,453 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-25 23:45:40,490 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:45:40,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:45:40,491 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:45:40,491 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:45:40,492 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:45:40,492 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:45:40,493 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:45:40,493 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:45:40,493 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:45:40,493 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:45:40,495 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:45:40,495 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:45:40,495 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:45:40,495 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:45:40,496 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:45:40,496 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:45:40,496 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:45:40,496 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:45:40,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:45:40,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:45:40,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:45:40,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:45:40,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:45:40,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:45:40,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:45:40,499 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:45:40,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:45:40,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:45:40,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:45:40,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:45:40,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:45:40,501 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:45:40,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:45:40,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:45:40,502 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:45:40,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:45:40,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:45:40,504 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:45:40,504 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_17bbb6ef-71a2-4976-a885-fe7184c52065/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 588c504bc2fd23c9ce280a0a1b43a680048f163183a3674ad6d00cde5eb05799 [2022-11-25 23:45:40,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:45:40,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:45:40,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:45:40,870 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:45:40,871 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:45:40,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2022-11-25 23:45:44,045 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:45:44,669 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:45:44,671 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i [2022-11-25 23:45:44,717 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur/data/7f4af602e/bcc18d8dde764dafb136a77c09d652e2/FLAGbcaa1d279 [2022-11-25 23:45:44,740 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur/data/7f4af602e/bcc18d8dde764dafb136a77c09d652e2 [2022-11-25 23:45:44,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:45:44,745 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:45:44,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:45:44,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:45:44,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:45:44,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:45:44" (1/1) ... [2022-11-25 23:45:44,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43708a2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:45:44, skipping insertion in model container [2022-11-25 23:45:44,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:45:44" (1/1) ... [2022-11-25 23:45:44,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:45:44,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:45:45,178 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_17bbb6ef-71a2-4976-a885-fe7184c52065/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2022-11-25 23:45:45,188 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_17bbb6ef-71a2-4976-a885-fe7184c52065/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2022-11-25 23:45:46,201 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:46,202 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:46,203 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:46,204 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:46,205 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:46,224 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:46,225 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:46,227 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:46,228 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:46,231 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:46,233 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:46,234 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:46,235 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:46,353 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 23:45:46,354 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 23:45:46,355 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 23:45:46,361 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 23:45:46,364 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 23:45:46,365 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 23:45:46,769 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 23:45:46,772 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 23:45:46,775 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 23:45:46,778 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 23:45:46,780 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 23:45:46,782 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 23:45:46,785 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 23:45:46,785 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 23:45:46,786 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 23:45:46,788 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 23:45:46,789 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 23:45:47,010 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 23:45:47,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:45:47,058 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:45:47,073 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_17bbb6ef-71a2-4976-a885-fe7184c52065/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4496,4509] [2022-11-25 23:45:47,073 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_17bbb6ef-71a2-4976-a885-fe7184c52065/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness.i[4556,4569] [2022-11-25 23:45:47,120 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:47,121 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:47,122 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:47,122 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:47,124 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:47,133 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:47,134 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:47,136 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:47,136 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:47,138 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:47,139 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:47,139 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:47,140 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 23:45:47,149 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 23:45:47,150 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 23:45:47,151 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 23:45:47,155 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 23:45:47,158 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 23:45:47,159 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 23:45:47,188 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 23:45:47,189 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 23:45:47,190 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 23:45:47,191 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 23:45:47,192 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 23:45:47,193 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 23:45:47,194 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 23:45:47,195 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 23:45:47,195 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 23:45:47,196 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 23:45:47,196 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 23:45:47,291 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 23:45:47,315 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:45:47,522 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:45:47,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:45:47 WrapperNode [2022-11-25 23:45:47,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:45:47,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:45:47,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:45:47,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:45:47,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:45:47" (1/1) ... [2022-11-25 23:45:47,678 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:45:47" (1/1) ... [2022-11-25 23:45:47,738 INFO L138 Inliner]: procedures = 679, calls = 1047, calls flagged for inlining = 49, calls inlined = 4, statements flattened = 88 [2022-11-25 23:45:47,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:45:47,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:45:47,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:45:47,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:45:47,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:45:47" (1/1) ... [2022-11-25 23:45:47,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:45:47" (1/1) ... [2022-11-25 23:45:47,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:45:47" (1/1) ... [2022-11-25 23:45:47,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:45:47" (1/1) ... [2022-11-25 23:45:47,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:45:47" (1/1) ... [2022-11-25 23:45:47,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:45:47" (1/1) ... [2022-11-25 23:45:47,776 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:45:47" (1/1) ... [2022-11-25 23:45:47,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:45:47" (1/1) ... [2022-11-25 23:45:47,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:45:47,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:45:47,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:45:47,784 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:45:47,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:45:47" (1/1) ... [2022-11-25 23:45:47,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:45:47,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:45:47,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:45:47,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:45:47,889 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-11-25 23:45:47,890 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-11-25 23:45:47,890 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2022-11-25 23:45:47,890 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2022-11-25 23:45:47,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:45:47,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 23:45:47,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 23:45:47,891 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 23:45:47,891 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-25 23:45:47,891 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-25 23:45:47,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:45:47,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 23:45:47,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:45:47,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:45:47,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-25 23:45:47,892 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-25 23:45:47,892 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 23:45:47,893 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 23:45:47,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:45:47,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 23:45:47,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 23:45:47,893 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-11-25 23:45:47,894 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-11-25 23:45:47,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:45:48,135 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:45:48,138 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:45:48,516 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:45:48,703 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:45:48,703 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 23:45:48,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:45:48 BoogieIcfgContainer [2022-11-25 23:45:48,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:45:48,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:45:48,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:45:48,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:45:48,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:45:44" (1/3) ... [2022-11-25 23:45:48,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2ab7ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:45:48, skipping insertion in model container [2022-11-25 23:45:48,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:45:47" (2/3) ... [2022-11-25 23:45:48,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2ab7ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:45:48, skipping insertion in model container [2022-11-25 23:45:48,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:45:48" (3/3) ... [2022-11-25 23:45:48,716 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_remove_harness.i [2022-11-25 23:45:48,736 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:45:48,736 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:45:48,796 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:45:48,809 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;@502dd0f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:45:48,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:45:48,817 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-25 23:45:48,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 23:45:48,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:45:48,832 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:45:48,833 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:45:48,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:45:48,841 INFO L85 PathProgramCache]: Analyzing trace with hash -113877497, now seen corresponding path program 1 times [2022-11-25 23:45:48,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:45:48,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742181983] [2022-11-25 23:45:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:48,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:45:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:45:49,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:45:49,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742181983] [2022-11-25 23:45:49,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742181983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:45:49,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:45:49,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:45:49,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052041635] [2022-11-25 23:45:49,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:45:49,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 23:45:49,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:45:49,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 23:45:49,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:45:49,627 INFO L87 Difference]: Start difference. First operand has 52 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:45:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:45:49,699 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2022-11-25 23:45:49,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 23:45:49,702 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2022-11-25 23:45:49,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:45:49,712 INFO L225 Difference]: With dead ends: 92 [2022-11-25 23:45:49,712 INFO L226 Difference]: Without dead ends: 50 [2022-11-25 23:45:49,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 23:45:49,744 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:45:49,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:45:49,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-25 23:45:49,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-25 23:45:49,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-25 23:45:49,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-11-25 23:45:49,815 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 30 [2022-11-25 23:45:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:45:49,830 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-11-25 23:45:49,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:45:49,835 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-11-25 23:45:49,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 23:45:49,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:45:49,839 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:45:49,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:45:49,841 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:45:49,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:45:49,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1025841595, now seen corresponding path program 1 times [2022-11-25 23:45:49,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:45:49,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486284224] [2022-11-25 23:45:49,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:49,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:45:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:45:50,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:45:50,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486284224] [2022-11-25 23:45:50,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486284224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:45:50,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:45:50,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:45:50,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658262444] [2022-11-25 23:45:50,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:45:50,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:45:50,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:45:50,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:45:50,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:45:50,395 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-25 23:45:50,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:45:50,617 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-11-25 23:45:50,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:45:50,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 35 [2022-11-25 23:45:50,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:45:50,619 INFO L225 Difference]: With dead ends: 60 [2022-11-25 23:45:50,619 INFO L226 Difference]: Without dead ends: 58 [2022-11-25 23:45:50,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:45:50,621 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 5 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:45:50,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 242 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:45:50,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-25 23:45:50,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-11-25 23:45:50,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 18 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-11-25 23:45:50,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-11-25 23:45:50,644 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 35 [2022-11-25 23:45:50,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:45:50,646 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-11-25 23:45:50,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-25 23:45:50,647 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-11-25 23:45:50,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 23:45:50,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:45:50,648 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:45:50,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:45:50,649 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:45:50,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:45:50,660 INFO L85 PathProgramCache]: Analyzing trace with hash -668758344, now seen corresponding path program 1 times [2022-11-25 23:45:50,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:45:50,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094390151] [2022-11-25 23:45:50,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:50,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:45:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:45:51,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:45:51,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094390151] [2022-11-25 23:45:51,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094390151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:45:51,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:45:51,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:45:51,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982331838] [2022-11-25 23:45:51,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:45:51,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:45:51,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:45:51,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:45:51,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:45:51,225 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:45:51,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:45:51,349 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2022-11-25 23:45:51,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:45:51,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 36 [2022-11-25 23:45:51,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:45:51,354 INFO L225 Difference]: With dead ends: 100 [2022-11-25 23:45:51,355 INFO L226 Difference]: Without dead ends: 58 [2022-11-25 23:45:51,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:45:51,357 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:45:51,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 154 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:45:51,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-25 23:45:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-11-25 23:45:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 32 states have internal predecessors, (34), 18 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-11-25 23:45:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-11-25 23:45:51,379 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 36 [2022-11-25 23:45:51,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:45:51,385 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-11-25 23:45:51,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 23:45:51,386 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-11-25 23:45:51,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 23:45:51,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:45:51,388 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 23:45:51,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 23:45:51,389 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:45:51,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:45:51,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1257838343, now seen corresponding path program 1 times [2022-11-25 23:45:51,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:45:51,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168490856] [2022-11-25 23:45:51,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:51,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:45:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:45:52,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:45:52,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168490856] [2022-11-25 23:45:52,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168490856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:45:52,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234776989] [2022-11-25 23:45:52,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:52,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:45:52,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:45:52,099 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:45:52,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:45:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:52,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 23:45:52,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:52,603 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 23:45:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:45:52,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:45:53,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-25 23:45:53,341 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 22 treesize of output 20 [2022-11-25 23:45:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:45:53,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234776989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:45:53,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1591172948] [2022-11-25 23:45:53,419 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:45:53,419 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:45:53,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:45:53,430 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:45:53,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:45:53,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:45:53,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:45:53,676 INFO L321 Elim1Store]: treesize reduction 84, result has 39.6 percent of original size [2022-11-25 23:45:53,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 179 treesize of output 113 [2022-11-25 23:45:53,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:45:53,775 INFO L321 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2022-11-25 23:45:53,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 41 [2022-11-25 23:45:53,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-11-25 23:45:53,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:45:53,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:45:53,924 INFO L321 Elim1Store]: treesize reduction 92, result has 33.8 percent of original size [2022-11-25 23:45:53,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 179 treesize of output 105 [2022-11-25 23:45:53,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:53,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 23:45:54,030 INFO L321 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-11-25 23:45:54,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 139 treesize of output 34 [2022-11-25 23:45:54,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:54,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:54,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:54,274 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-25 23:45:54,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 65 treesize of output 113 [2022-11-25 23:45:54,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:54,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:54,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:54,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 24 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 48 [2022-11-25 23:45:54,452 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_remove with input of size 37 for LOIs [2022-11-25 23:45:54,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:55,368 INFO L321 Elim1Store]: treesize reduction 327, result has 24.8 percent of original size [2022-11-25 23:45:55,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 726 treesize of output 493 [2022-11-25 23:45:55,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:55,744 INFO L321 Elim1Store]: treesize reduction 387, result has 27.1 percent of original size [2022-11-25 23:45:55,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 637 treesize of output 599 [2022-11-25 23:45:55,862 INFO L321 Elim1Store]: treesize reduction 101, result has 44.5 percent of original size [2022-11-25 23:45:55,863 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 0 new quantified variables, introduced 1 case distinctions, treesize of input 151 treesize of output 81 [2022-11-25 23:45:55,961 INFO L321 Elim1Store]: treesize reduction 101, result has 44.5 percent of original size [2022-11-25 23:45:55,961 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 0 new quantified variables, introduced 1 case distinctions, treesize of input 151 treesize of output 81 [2022-11-25 23:45:56,094 INFO L321 Elim1Store]: treesize reduction 131, result has 10.9 percent of original size [2022-11-25 23:45:56,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 815 treesize of output 608 [2022-11-25 23:45:56,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:56,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 82 [2022-11-25 23:45:56,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:56,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:45:56,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 551 treesize of output 391 [2022-11-25 23:45:56,524 INFO L321 Elim1Store]: treesize reduction 194, result has 30.5 percent of original size [2022-11-25 23:45:56,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1652 treesize of output 1082 [2022-11-25 23:45:56,563 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 27 treesize of output 5 [2022-11-25 23:45:56,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:56,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:56,613 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-25 23:45:56,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 113 [2022-11-25 23:45:56,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:56,706 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-25 23:45:56,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 952 treesize of output 884 [2022-11-25 23:45:56,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:56,767 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:45:56,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 980 treesize of output 970 [2022-11-25 23:45:56,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:56,953 INFO L321 Elim1Store]: treesize reduction 8, result has 92.4 percent of original size [2022-11-25 23:45:56,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 1021 treesize of output 1043 [2022-11-25 23:45:57,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:57,079 INFO L321 Elim1Store]: treesize reduction 65, result has 13.3 percent of original size [2022-11-25 23:45:57,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 993 treesize of output 929 [2022-11-25 23:45:57,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:45:57,599 INFO L321 Elim1Store]: treesize reduction 72, result has 4.0 percent of original size [2022-11-25 23:45:57,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 912 treesize of output 845 [2022-11-25 23:45:57,663 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 23:45:57,664 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 852 treesize of output 818 [2022-11-25 23:45:57,862 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 880 treesize of output 840 [2022-11-25 23:46:01,706 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:46:01,714 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:46:01,720 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:46:01,727 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:46:01,747 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:46:01,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-25 23:46:01,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 63 [2022-11-25 23:46:01,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 65 [2022-11-25 23:46:01,799 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:46:01,806 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:46:01,814 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:46:01,822 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:46:02,122 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 48 for LOIs [2022-11-25 23:46:02,164 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 43 for LOIs [2022-11-25 23:46:02,179 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 41 for LOIs [2022-11-25 23:46:02,201 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 25 for LOIs [2022-11-25 23:46:02,305 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 55 for LOIs [2022-11-25 23:46:02,469 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:46:02,478 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 23:46:02,489 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:46:02,498 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:46:02,511 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-25 23:46:02,600 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:46:07,854 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '924#(and (<= |~#s_can_fail_allocator_static~0.base| 4) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (<= 4 |~#s_can_fail_allocator_static~0.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (exists ((|v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.base_BEFORE_CALL_10| Int) (|v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.offset_BEFORE_CALL_10| Int)) (and (not (= (mod (select (select |#memory_int| |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.base_BEFORE_CALL_10|) |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.offset_BEFORE_CALL_10|) 256) 0)) (not (= (mod (ite (= (ite (or (not (= |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.base_BEFORE_CALL_10| 0)) (not (= |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.offset_BEFORE_CALL_10| 0))) 1 0) 0) 0 1) 256) 0)) (<= 0 |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.offset_BEFORE_CALL_10|) (<= 0 |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.base_BEFORE_CALL_10|) (<= |v_aws_linked_list_remove_aws_linked_list_node_reset_~node#1.offset_BEFORE_CALL_10| 0))) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-11-25 23:46:07,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:46:07,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:46:07,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 8] total 17 [2022-11-25 23:46:07,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032191406] [2022-11-25 23:46:07,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:46:07,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 23:46:07,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:46:07,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 23:46:07,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1758, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 23:46:07,859 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-25 23:46:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:09,014 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2022-11-25 23:46:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:46:09,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 37 [2022-11-25 23:46:09,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:09,016 INFO L225 Difference]: With dead ends: 109 [2022-11-25 23:46:09,016 INFO L226 Difference]: Without dead ends: 65 [2022-11-25 23:46:09,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=161, Invalid=2095, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 23:46:09,018 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 51 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:09,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 325 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 23:46:09,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-25 23:46:09,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-11-25 23:46:09,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 18 states have call successors, (18), 9 states have call predecessors, (18), 10 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-11-25 23:46:09,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-11-25 23:46:09,032 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 37 [2022-11-25 23:46:09,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:09,033 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-11-25 23:46:09,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (11), 3 states have call predecessors, (11), 6 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-25 23:46:09,033 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-11-25 23:46:09,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-25 23:46:09,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:09,034 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 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] [2022-11-25 23:46:09,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:46:09,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:09,235 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:46:09,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:09,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1164062601, now seen corresponding path program 1 times [2022-11-25 23:46:09,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:46:09,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440100699] [2022-11-25 23:46:09,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:09,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:46:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:46:09,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:46:09,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440100699] [2022-11-25 23:46:09,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440100699] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:46:09,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926315635] [2022-11-25 23:46:09,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:09,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:09,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:46:09,823 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:46:09,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17bbb6ef-71a2-4976-a885-fe7184c52065/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:46:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:10,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 23:46:10,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:10,185 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-25 23:46:10,215 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-25 23:46:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:46:10,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:11,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-25 23:46:11,405 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 54 treesize of output 50 [2022-11-25 23:46:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:46:11,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926315635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:11,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126158843] [2022-11-25 23:46:11,485 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:46:11,485 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:46:11,486 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:46:11,486 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:46:11,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:46:11,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,793 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-11-25 23:46:11,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 65 treesize of output 113 [2022-11-25 23:46:11,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 26 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 91 [2022-11-25 23:46:11,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 37 [2022-11-25 23:46:11,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-25 23:46:11,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 26 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 91 [2022-11-25 23:46:11,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:11,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 24 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 48 [2022-11-25 23:46:12,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:12,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 16 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 26 [2022-11-25 23:46:12,129 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_remove with input of size 170 for LOIs [2022-11-25 23:46:12,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:13,276 INFO L321 Elim1Store]: treesize reduction 327, result has 24.8 percent of original size [2022-11-25 23:46:13,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 726 treesize of output 493 [2022-11-25 23:46:13,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:46:13,636 INFO L321 Elim1Store]: treesize reduction 387, result has 27.1 percent of original size [2022-11-25 23:46:13,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 637 treesize of output 599 [2022-11-25 23:46:13,775 INFO L321 Elim1Store]: treesize reduction 97, result has 45.5 percent of original size [2022-11-25 23:46:13,775 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 0 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 81 [2022-11-25 23:46:13,882 INFO L321 Elim1Store]: treesize reduction 97, result has 45.5 percent of original size [2022-11-25 23:46:13,883 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 0 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 81